0.53.0

This reload command wouldn't run before the fix:

  : | fzf --bind 'start:reload:echo \{}'

.github/workflows/typos.yml

@@ -7,4 +7,4 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
-    - uses: crate-ci/typos@v1.19.0
+    - uses: crate-ci/typos@v1.21.0

.goreleaser.yml

@@ -12,6 +12,8 @@ builds:
       - darwin
     goarch:
       - amd64
+    flags:
+      - -trimpath
     ldflags:
       - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
     hooks:
@@ -19,7 +21,7 @@ builds:
         sh -c '
         cat > /tmp/fzf-gon-amd64.hcl << EOF
         source = ["./dist/fzf-macos_darwin_amd64_v1/fzf"]
-        bundle_id = "kr.junegunn.fzf"
+        bundle_id = "junegunn.fzf"
         sign {
           application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
         }
@@ -36,6 +38,8 @@ builds:
       - darwin
     goarch:
       - arm64
+    flags:
+      - -trimpath
     ldflags:
       - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
     hooks:
@@ -43,7 +47,7 @@ builds:
         sh -c '
         cat > /tmp/fzf-gon-arm64.hcl << EOF
         source = ["./dist/fzf-macos-arm_darwin_arm64/fzf"]
-        bundle_id = "kr.junegunn.fzf"
+        bundle_id = "junegunn.fzf"
         sign {
           application_identity = "Developer ID Application: Junegunn Choi (Y254DRW44Z)"
         }
@@ -71,6 +75,8 @@ builds:
       - 5
       - 6
       - 7
+    flags:
+      - -trimpath
     ldflags:
       - "-s -w -X main.version={{ .Version }} -X main.revision={{ .ShortCommit }}"
     ignore:

ADVANCED.md

@@ -1,18 +1,17 @@
 Advanced fzf examples
 ======================
 
-* *Last update: 2024/01/20*
-* *Requires fzf 0.46.0 or above*
+* *Last update: 2024/06/06*
+* *Requires fzf 0.53.0 or later*
 
 ---
 
 <!-- vim-markdown-toc GFM -->
 
 * [Introduction](#introduction)
-* [Screen Layout](#screen-layout)
+* [Display modes](#display-modes)
     * [`--height`](#--height)
-    * [`fzf-tmux`](#fzf-tmux)
-        * [Popup window support](#popup-window-support)
+    * [`--tmux`](#--tmux)
 * [Dynamic reloading of the list](#dynamic-reloading-of-the-list)
     * [Updating the list of processes by pressing CTRL-R](#updating-the-list-of-processes-by-pressing-ctrl-r)
     * [Toggling between data sources](#toggling-between-data-sources)
@@ -63,7 +62,7 @@ learn its wide variety of features.
 This document will guide you through some examples that will familiarize you
 with the advanced features of fzf.
 
-Screen Layout
+Display modes
 -------------
 
 ### `--height`
@@ -104,56 +103,55 @@ Define `$FZF_DEFAULT_OPTS` like so:
 export FZF_DEFAULT_OPTS="--height=40% --layout=reverse --info=inline --border --margin=1 --padding=1"
 ```
 
-### `fzf-tmux`
+### `--tmux`
 
-Before fzf had `--height` option, we would open fzf in a tmux split pane not
-to take up the whole screen. This is done using `fzf-tmux` script.
+(Requires tmux 3.3 or later)
+
+If you're using tmux, you can open fzf in a tmux popup using `--tmux` option.
 
 ```sh
-# Open fzf on a tmux split pane below the current pane.
-# Takes the same set of options.
-fzf-tmux --layout=reverse
+# Open fzf in a tmux popup at the center of the screen with 70% width and height
+fzf --tmux 70%
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113379973-f1cc6500-93b5-11eb-8860-c9bc4498aadf.png)
+![image](https://github.com/junegunn/fzf/assets/700826/9c365405-c700-49b2-8985-60d822ed4cff)
 
-The limitation of `fzf-tmux` is that it only works when you're on tmux unlike
-`--height` option. But the advantage of it is that it's more flexible.
-(See `man fzf-tmux` for available options.)
+`--tmux` option is silently ignored if you're not on tmux. So if you're trying
+to avoid opening fzf in fullscreen, try specifying both `--height` and `--tmux`.
 
 ```sh
-# On the right (50%)
-fzf-tmux -r
-
-# On the left (30%)
-fzf-tmux -l30%
-
-# Above the cursor
-fzf-tmux -u30%
+# --tmux is specified later so it takes precedence over --height when on tmux.
+# If you're not on tmux, --tmux is ignored and --height is used instead.
+fzf  --height 70% --tmux 70%
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113379983-fa24a000-93b5-11eb-93eb-8a3d39b2f163.png)
+You can also specify the position, width, and height of the popup window in
+the following format:
 
-![image](https://user-images.githubusercontent.com/700826/113380001-0577cb80-93b6-11eb-95d0-2ba453866882.png)
-
-![image](https://user-images.githubusercontent.com/700826/113380040-1d4f4f80-93b6-11eb-9bef-737fb120aafe.png)
-
-#### Popup window support
-
-But here's the really cool part; tmux 3.2 added support for popup windows. So
-you can open fzf in a popup window, which is quite useful if you frequently
-use split panes.
+* `[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]`
 
 ```sh
-# Open tmux in a tmux popup window (default size: 50% of the screen)
-fzf-tmux -p
-
-# 80% width, 60% height
-fzf-tmux -p 80%,60%
+# 100% width and 60% height
+fzf --tmux 100%,60% --border horizontal
 ```
 
-![image](https://user-images.githubusercontent.com/700826/113380106-4a9bfd80-93b6-11eb-8cee-aeb1c4ce1a1f.png)
+![image](https://github.com/junegunn/fzf/assets/700826/f80d3514-d69f-42f2-a8de-a392a562bfcf)
 
+```sh
+# On the right (50% width)
+fzf --tmux right
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/4033ade4-7efa-421b-a3fb-a430d197098a)
+
+```sh
+# On the left (40% width and 70% height)
+fzf --tmux left,40%,70%
+```
+
+![image](https://github.com/junegunn/fzf/assets/700826/efe43881-2bf0-49ea-ab2e-1377f778cd52)
+
+> [!TIP]
 > You might also want to check out my tmux plugins which support this popup
 > window layout.
 >
@@ -536,8 +534,8 @@ pods() {
     --bind 'start:reload:$command' \
     --bind 'ctrl-r:reload:$command' \
     --bind 'ctrl-/:change-preview-window(80%,border-bottom|hidden|)' \
-    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash > /dev/tty' \
-    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2}) > /dev/tty' \
+    --bind 'enter:execute:kubectl exec -it --namespace {1} {2} -- bash' \
+    --bind 'ctrl-o:execute:${EDITOR:-vim} <(kubectl logs --all-containers --namespace {1} {2})' \
     --preview-window up:follow \
     --preview 'kubectl logs --follow --all-containers --tail=10000 --namespace {1} {2}' "$@"
 }

CHANGELOG.md

@@ -1,6 +1,139 @@
 CHANGELOG
 =========
 
+0.53.0
+------
+- Multi-line display
+    - See [Processing multi-line items](https://junegunn.github.io/fzf/tips/processing-multi-line-items/)
+    - fzf can now display multi-line items
+      ```sh
+      # All bash functions, highlighted
+      declare -f | perl -0777 -pe 's/^}\n/}\0/gm' |
+        bat --plain --language bash --color always |
+        fzf --read0 --ansi --reverse --multi --highlight-line
+
+      # Ripgrep multi-line output
+      rg --pretty bash | perl -0777 -pe 's/\n\n/\n\0/gm' |
+        fzf --read0 --ansi --multi --highlight-line --reverse --tmux 70%
+      ```
+        - To disable multi-line display, use `--no-multi-line`
+    - CTRL-R bindings of bash, zsh, and fish have been updated to leverage multi-line display
+    - The default `--pointer` and `--marker` have been changed from `>` to Unicode bar characters as they look better with multi-line items
+    - Added `--marker-multi-line` to customize the select marker for multi-line entries with the default set to `╻┃╹`
+      ```
+      ╻First line
+      ┃...
+      ╹Last line
+      ```
+- Native tmux integration
+    - Added `--tmux` option to replace fzf-tmux script and simplify distribution
+      ```sh
+      # --tmux [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
+      # Center, 100% width and 70% height
+      fzf --tmux 100%,70% --border horizontal --padding 1,2
+
+      # Left, 30% width
+      fzf --tmux left,30%
+
+      # Bottom, 50% height
+      fzf --tmux bottom,50%
+      ```
+        - To keep the implementation simple, it only uses popups. You need tmux 3.3 or later.
+    - To use `--tmux` in Vim plugin:
+      ```vim
+      let g:fzf_layout = { 'tmux': '100%,70%' }
+      ```
+- Added support for endless input streams
+    - See [Browsing log stream with fzf](https://junegunn.github.io/fzf/tips/browsing-log-streams/)
+    - Added `--tail=NUM` option to limit the number of items to keep in memory. This is useful when you want to browse an endless stream of data (e.g. log stream) with fzf while limiting memory usage.
+      ```sh
+      # Interactive filtering of a log stream
+      tail -f *.log | fzf --tail 100000 --tac --no-sort --exact
+      ```
+- Better Windows Support
+    - fzf now works on Git bash (mintty) out of the box via winpty integration
+    - Many fixes and improvements for Windows
+- man page is now embedded in the binary; `fzf --man` to see it
+- Changed the default `--scroll-off` to 3, as we think it's a better default
+- Process started by `execute` action now directly writes to and reads from `/dev/tty`. Manual `/dev/tty` redirection for interactive programs is no longer required.
+  ```sh
+  # Vim will work fine without /dev/tty redirection
+  ls | fzf --bind 'space:execute:vim {}' > selected
+  ```
+- Added `print(...)` action to queue an arbitrary string to be printed on exit. This was mainly added to work around the limitation of `--expect` where it's not compatible with `--bind` on the same key and it would ignore other actions bound to it.
+  ```sh
+  # This doesn't work as expected because --expect is not compatible with --bind
+  fzf --multi --expect ctrl-y --bind 'ctrl-y:select-all'
+
+  # This is something you can do instead
+  fzf --multi --bind 'enter:print()+accept,ctrl-y:select-all+print(ctrl-y)+accept'
+  ```
+    - We also considered making them compatible, but realized that some users may have been relying on the current behavior.
+- [`NO_COLOR`](https://no-color.org/) environment variable is now respected. If the variable is set, fzf defaults to `--no-color` unless otherwise specified.
+
+0.52.1
+------
+- Fixed a critical bug in the Windows version
+    - Windows users are strongly encouraged to upgrade to this version
+
+0.52.0
+------
+- Added `--highlight-line` to highlight the whole current line (à la `set cursorline` of Vim)
+- Added color names for selected lines: `selected-fg`, `selected-bg`, and `selected-hl`
+  ```sh
+  fzf --border --multi --info inline-right --layout reverse --marker ▏ --pointer ▌ --prompt '▌ '  \
+      --highlight-line --color gutter:-1,selected-bg:238,selected-fg:146,current-fg:189
+  ```
+- Added `click-header` event that is triggered when the header section is clicked. When the event is triggered, `$FZF_CLICK_HEADER_COLUMN` and `$FZF_CLICK_HEADER_LINE` are set.
+  ```sh
+  fd --type f |
+    fzf --header $'[Files] [Directories]' --header-first \
+        --bind 'click-header:transform:
+          (( FZF_CLICK_HEADER_COLUMN <= 7 )) && echo "reload(fd --type f)"
+          (( FZF_CLICK_HEADER_COLUMN >= 9 )) && echo "reload(fd --type d)"
+        '
+  ```
+- Add `$FZF_COMPLETION_{DIR,PATH}_OPTS` for separately customizing the behavior of fuzzy completion
+  ```sh
+  # Set --walker options without 'follow' not to follow symbolic links
+  FZF_COMPLETION_PATH_OPTS="--walker=file,dir,hidden"
+  FZF_COMPLETION_DIR_OPTS="--walker=dir,hidden"
+  ```
+- Fixed Windows argument escaping
+- Bug fixes and improvements
+- The code was heavily refactored to allow using fzf as a library in Go programs. The API is still experimental and subject to change.
+    - https://gist.github.com/junegunn/193990b65be48a38aac6ac49d5669170
+
+0.51.0
+------
+- Added a new environment variable `$FZF_POS` exported to the child processes. It's the vertical position of the cursor in the list starting from 1.
+  ```sh
+  # Toggle selection to the top or to the bottom
+  seq 30 | fzf --multi --bind 'load:pos(10)' \
+    --bind 'shift-up:transform:for _ in $(seq $FZF_POS $FZF_MATCH_COUNT); do echo -n +toggle+up; done' \
+    --bind 'shift-down:transform:for _ in $(seq 1 $FZF_POS); do echo -n +toggle+down; done'
+  ```
+- Added `--with-shell` option to start child processes with a custom shell command and flags
+  ```sh
+  gem list | fzf --with-shell 'ruby -e' \
+    --preview 'pp Gem::Specification.find_by_name({1})' \
+    --bind 'ctrl-o:execute-silent:
+        spec = Gem::Specification.find_by_name({1})
+        [spec.homepage, *spec.metadata.filter { _1.end_with?("uri") }.values].uniq.each do
+          system "open", _1
+        end
+    '
+  ```
+- Added `change-multi` action for dynamically changing `--multi` option
+    - `change-multi` - enable multi-select mode with no limit
+    - `change-multi(NUM)` - enable multi-select mode with a limit
+    - `change-multi(0)` - disable multi-select mode
+- Windows improvements
+    - `become` action is now supported on Windows
+        - Unlike in *nix, this does not use `execve(2)`. Instead it spawns a new process and waits for it to finish, so the exact behavior may differ.
+    - Fixed argument escaping for Windows cmd.exe. No redundant escaping of backslashes.
+- Bug fixes and improvements
+
 0.50.0
 ------
 - Search performance optimization. You can observe 50%+ improvement in some scenarios.

Dockerfile

@@ -1,6 +1,6 @@
-FROM --platform=linux/amd64 ubuntu:22.04
+FROM ubuntu:24.04
 RUN apt-get update -y && apt install -y git make golang zsh fish ruby tmux
-RUN gem install --no-document -v 5.14.2 minitest
+RUN gem install --no-document -v 5.22.3 minitest
 RUN echo '. /usr/share/bash-completion/completions/git' >> ~/.bashrc
 RUN echo '. ~/.bashrc' >> ~/.bash_profile
 

Makefile

@@ -1,10 +1,10 @@
 SHELL          := bash
 GO             ?= go
-GOOS           ?= $(word 1, $(subst /, " ", $(word 4, $(shell go version))))
+GOOS           ?= $(shell $(GO) env GOOS)
 
 MAKEFILE       := $(realpath $(lastword $(MAKEFILE_LIST)))
 ROOT_DIR       := $(shell dirname $(MAKEFILE))
-SOURCES        := $(wildcard *.go src/*.go src/*/*.go shell/*sh) $(MAKEFILE)
+SOURCES        := $(wildcard *.go src/*.go src/*/*.go shell/*sh man/man1/*.1) $(MAKEFILE)
 
 ifdef FZF_VERSION
 VERSION        := $(FZF_VERSION)
@@ -25,7 +25,7 @@ endif
 ifeq ($(REVISION),)
 $(error Not on git repository; cannot determine $$FZF_REVISION)
 endif
-BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision=$(REVISION)" -tags "$(TAGS)"
+BUILD_FLAGS    := -a -ldflags "-s -w -X main.version=$(VERSION) -X main.revision=$(REVISION)" -tags "$(TAGS)" -trimpath
 
 BINARY32       := fzf-$(GOOS)_386
 BINARY64       := fzf-$(GOOS)_amd64
@@ -79,7 +79,6 @@ all: target/$(BINARY)
 test: $(SOURCES)
 	[ -z "$$(gofmt -s -d src)" ] || (gofmt -s -d src; exit 1)
 	SHELL=/bin/sh GOOS= $(GO) test -v -tags "$(TAGS)" \
-				github.com/junegunn/fzf \
 				github.com/junegunn/fzf/src \
 				github.com/junegunn/fzf/src/algo \
 				github.com/junegunn/fzf/src/tui \
@@ -174,12 +173,12 @@ bin/fzf: target/$(BINARY) | bin
 	cp -f target/$(BINARY) bin/fzf
 
 docker:
-	docker build -t fzf-arch .
-	docker run -it fzf-arch tmux
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu tmux
 
 docker-test:
-	docker build -t fzf-arch .
-	docker run -it fzf-arch
+	docker build -t fzf-ubuntu .
+	docker run -it fzf-ubuntu
 
 update:
 	$(GO) get -u

README-VIM.md

@@ -294,7 +294,7 @@ The following table summarizes the available options.
 | `options`                  | string/list   | Options to fzf                                                        |
 | `dir`                      | string        | Working directory                                                     |
 | `up`/`down`/`left`/`right` | number/string | (Layout) Window position and size (e.g. `20`, `50%`)                  |
-| `tmux`                     | string        | (Layout) fzf-tmux options (e.g. `-p90%,60%`)                          |
+| `tmux`                     | string        | (Layout) `--tmux` options (e.g. `90%,70%`)                            |
 | `window` (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g. `vertical aboveleft 30new`) |
 | `window` (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g. `{'width': 0.9, 'height': 0.6}`) |
 
@@ -457,12 +457,13 @@ let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
 ```
 
 Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
-or above) by putting fzf-tmux options in `tmux` key.
+or above) by putting `--tmux` option value in `tmux` key.
 
 ```vim
-" See `man fzf-tmux` for available options
+" See `--tmux` option in `man fzf` for available options
+" [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
 if exists('$TMUX')
-  let g:fzf_layout = { 'tmux': '-p90%,60%' }
+  let g:fzf_layout = { 'tmux': '90%,70%' }
 else
   let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
 endif

bin/fzf-tmux

@@ -7,7 +7,7 @@ fail() {
   exit 2
 }
 
-fzf="$(command -v fzf 2> /dev/null)" || fzf="$(dirname "$0")/fzf"
+fzf="$(command which fzf)" || fzf="$(dirname "$0")/fzf"
 [[ -x "$fzf" ]] || fail 'fzf executable not found'
 
 args=()
@@ -132,8 +132,10 @@ if [[ -z "$TMUX" ]]; then
   exit $?
 fi
 
-# --height option is not allowed. CTRL-Z is also disabled.
-args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore")
+# * --height option is not allowed
+# * CTRL-Z is also disabled
+# * fzf-tmux script is not compatible with --tmux option in fzf 0.53.0 or later
+args=("${args[@]}" "--no-height" "--bind=ctrl-z:ignore" "--no-tmux")
 
 # Handle zoomed tmux pane without popup options by moving it to a temp window
 if [[ ! "$opt" =~ "-E" ]] && tmux list-panes -F '#F' | grep -q Z; then

doc/fzf.txt

@@ -311,7 +311,7 @@ The following table summarizes the available options.
   `options`                   | string/list   | Options to fzf
   `dir`                       | string        | Working directory
   `up` / `down` / `left` / `right`  | number/string | (Layout) Window position and size (e.g.  `20` ,  `50%` )
-  `tmux`                      | string        | (Layout) fzf-tmux options (e.g.  `-p90%,60%` )
+  `tmux`                      | string        | (Layout) `--tmux` options (e.g.  `90%,70%` )
   `window`  (Vim 8 / Neovim)  | string        | (Layout) Command to open fzf window (e.g.  `vertical aboveleft 30new` )
   `window`  (Vim 8 / Neovim)  | dict          | (Layout) Popup window settings (e.g.  `{'width': 0.9, 'height': 0.6}` )
  ---------------------------+---------------+----------------------------------------------------------------------
@@ -469,11 +469,12 @@ in Neovim.
     let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
 <
 Alternatively, you can make fzf open in a tmux popup window (requires tmux 3.2
-or above) by putting fzf-tmux options in `tmux` key.
+or above) by putting `--tmux` options in `tmux` key.
 >
-    " See `man fzf-tmux` for available options
+    " See `--tmux` option in `man fzf` for available options
+    " [center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]
     if exists('$TMUX')
-      let g:fzf_layout = { 'tmux': '-p90%,60%' }
+      let g:fzf_layout = { 'tmux': '90%,70%' }
     else
       let g:fzf_layout = { 'window': { 'width': 0.9, 'height': 0.6 } }
     endif

go.mod

@@ -6,8 +6,8 @@ require (
 	github.com/mattn/go-isatty v0.0.20
 	github.com/mattn/go-shellwords v1.0.12
 	github.com/rivo/uniseg v0.4.7
-	golang.org/x/sys v0.19.0
-	golang.org/x/term v0.19.0
+	golang.org/x/sys v0.20.0
+	golang.org/x/term v0.20.0
 )
 
 require (

go.sum

@@ -36,14 +36,14 @@ golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f/go.mod h1:oPkhp1MJrh7nUepCBc
 golang.org/x/sys v0.5.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
 golang.org/x/sys v0.17.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
-golang.org/x/sys v0.19.0 h1:q5f1RH2jigJ1MoAWp2KTp3gm5zAGFUTarQZ5U386+4o=
-golang.org/x/sys v0.19.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
+golang.org/x/sys v0.20.0 h1:Od9JTbYCk261bKm4M/mw7AklTlFYIa0bIp9BgSm1S8Y=
+golang.org/x/sys v0.20.0/go.mod h1:/VUhepiaJMQUp4+oa/7Zr1D23ma6VTLIYjOOTFZPUcA=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=
 golang.org/x/term v0.0.0-20210927222741-03fcf44c2211/go.mod h1:jbD1KX2456YbFQfuXm/mYQcufACuNUgVhRMnK/tPxf8=
 golang.org/x/term v0.5.0/go.mod h1:jMB1sMXY+tzblOD4FWmEbocvup2/aLOaQEp7JmGp78k=
 golang.org/x/term v0.17.0/go.mod h1:lLRBjIVuehSbZlaOtGMbcMncT+aqLLLmKrsjNrUguwk=
-golang.org/x/term v0.19.0 h1:+ThwsDv+tYfnJFhF4L8jITxu1tdTWRTZpdsWgEgjL6Q=
-golang.org/x/term v0.19.0/go.mod h1:2CuTdWZ7KHSQwUzKva0cbMg6q2DMI3Mmxp+gKJbskEk=
+golang.org/x/term v0.20.0 h1:VnkxpohqXaOBYJtBmEppKUG6mXpi+4O6purfc2+sMhw=
+golang.org/x/term v0.20.0/go.mod h1:8UkIAJTvZgivsXaD6/pH6U9ecQzZ45awqEOzuCvwpFY=
 golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.3/go.mod h1:5Zoc/QRtKVWzQhOtBMvqHzDpF6irO9z98xDceosuGiQ=
 golang.org/x/text v0.3.7/go.mod h1:u+2+/6zg+i71rQMx5EYifcz6MCKuco9NR6JIITiCfzQ=

install

@@ -2,7 +2,7 @@
 
 set -u
 
-version=0.50.0
+version=0.53.0
 auto_completion=
 key_bindings=
 update_config=2
@@ -115,7 +115,7 @@ link_fzf_in_path() {
 try_curl() {
   command -v curl > /dev/null &&
   if [[ $1 =~ tar.gz$ ]]; then
-    curl -fL $1 | tar -xzf -
+    curl -fL $1 | tar --no-same-owner -xzf -
   else
     local temp=${TMPDIR:-/tmp}/fzf.zip
     curl -fLo "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
@@ -125,7 +125,7 @@ try_curl() {
 try_wget() {
   command -v wget > /dev/null &&
   if [[ $1 =~ tar.gz$ ]]; then
-    wget -O - $1 | tar -xzf -
+    wget -O - $1 | tar --no-same-owner -xzf -
   else
     local temp=${TMPDIR:-/tmp}/fzf.zip
     wget -O "$temp" $1 && unzip -o "$temp" && rm -f "$temp"
@@ -265,7 +265,11 @@ fi
 EOF
 
   if [[ $auto_completion -eq 1 ]] && [[ $key_bindings -eq 1 ]]; then
-    echo "eval \"\$(fzf --$shell)\"" >> "$src"
+    if [[ "$shell" = zsh ]]; then
+      echo "source <(fzf --$shell)" >> "$src"
+    else
+      echo "eval \"\$(fzf --$shell)\"" >> "$src"
+    fi
   else
     cat >> "$src" << EOF
 # Auto-completion

install.ps1

@@ -1,4 +1,4 @@
-$version="0.50.0"
+$version="0.53.0"
 
 $fzf_base=Split-Path -Parent $MyInvocation.MyCommand.Definition
 

main.go

@@ -3,14 +3,16 @@ package main
 import (
 	_ "embed"
 	"fmt"
+	"os"
+	"os/exec"
 	"strings"
 
 	fzf "github.com/junegunn/fzf/src"
 	"github.com/junegunn/fzf/src/protector"
 )
 
-var version string = "0.50"
-var revision string = "devel"
+var version = "0.53"
+var revision = "devel"
 
 //go:embed shell/key-bindings.bash
 var bashKeyBindings []byte
@@ -27,15 +29,30 @@ var zshCompletion []byte
 //go:embed shell/key-bindings.fish
 var fishKeyBindings []byte
 
+//go:embed man/man1/fzf.1
+var manPage []byte
+
 func printScript(label string, content []byte) {
 	fmt.Println("### " + label + " ###")
 	fmt.Println(strings.TrimSpace(string(content)))
 	fmt.Println("### end: " + label + " ###")
 }
 
+func exit(code int, err error) {
+	if code == fzf.ExitError {
+		fmt.Fprintln(os.Stderr, err.Error())
+	}
+	os.Exit(code)
+}
+
 func main() {
 	protector.Protect()
-	options := fzf.ParseOptions()
+
+	options, err := fzf.ParseOptions(true, os.Args[1:])
+	if err != nil {
+		exit(fzf.ExitError, err)
+		return
+	}
 	if options.Bash {
 		printScript("key-bindings.bash", bashKeyBindings)
 		printScript("completion.bash", bashCompletion)
@@ -51,5 +68,34 @@ func main() {
 		fmt.Println("fzf_key_bindings")
 		return
 	}
-	fzf.Run(options, version, revision)
+	if options.Help {
+		fmt.Print(fzf.Usage)
+		return
+	}
+	if options.Version {
+		if len(revision) > 0 {
+			fmt.Printf("%s (%s)\n", version, revision)
+		} else {
+			fmt.Println(version)
+		}
+		return
+	}
+	if options.Man {
+		file := fzf.WriteTemporaryFile([]string{string(manPage)}, "\n")
+		if len(file) == 0 {
+			fmt.Print(string(manPage))
+			return
+		}
+		defer os.Remove(file)
+		cmd := exec.Command("man", file)
+		cmd.Stdin = os.Stdin
+		cmd.Stdout = os.Stdout
+		if err := cmd.Run(); err != nil {
+			fmt.Print(string(manPage))
+		}
+		return
+	}
+
+	code, err := fzf.Run(options)
+	exit(code, err)
 }

main_test.go

@@ -1,158 +0,0 @@
-package main
-
-import (
-	"fmt"
-	"go/ast"
-	"go/build"
-	"go/importer"
-	"go/parser"
-	"go/token"
-	"go/types"
-	"io/fs"
-	"os"
-	"path/filepath"
-	"sort"
-	"strings"
-	"testing"
-)
-
-func loadPackages(t *testing.T) []*build.Package {
-	wd, err := os.Getwd()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	var pkgs []*build.Package
-	seen := make(map[string]bool)
-	err = filepath.WalkDir(wd, func(path string, d fs.DirEntry, err error) error {
-		if err != nil {
-			return err
-		}
-		name := d.Name()
-		if d.IsDir() {
-			if name == "" || name[0] == '.' || name[0] == '_' || name == "vendor" || name == "tmp" {
-				return filepath.SkipDir
-			}
-			return nil
-		}
-		if d.Type().IsRegular() && filepath.Ext(name) == ".go" && !strings.HasSuffix(name, "_test.go") {
-			dir := filepath.Dir(path)
-			if !seen[dir] {
-				pkg, err := build.ImportDir(dir, build.ImportComment)
-				if err != nil {
-					return fmt.Errorf("%s: %s", dir, err)
-				}
-				if pkg.ImportPath == "" || pkg.ImportPath == "." {
-					importPath, err := filepath.Rel(wd, dir)
-					if err != nil {
-						t.Fatal(err)
-					}
-					pkg.ImportPath = filepath.ToSlash(filepath.Join("github.com/junegunn/fzf", importPath))
-				}
-
-				pkgs = append(pkgs, pkg)
-				seen[dir] = true
-			}
-		}
-		return nil
-	})
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	sort.Slice(pkgs, func(i, j int) bool {
-		return pkgs[i].ImportPath < pkgs[j].ImportPath
-	})
-	return pkgs
-}
-
-var sourceImporter = importer.ForCompiler(token.NewFileSet(), "source", nil)
-
-func checkPackageForOsExit(t *testing.T, bpkg *build.Package, allowed map[string]int) (errOsExit bool) {
-	var files []*ast.File
-	fset := token.NewFileSet()
-	for _, name := range bpkg.GoFiles {
-		filename := filepath.Join(bpkg.Dir, name)
-		af, err := parser.ParseFile(fset, filename, nil, parser.ParseComments)
-		if err != nil {
-			t.Fatal(err)
-		}
-		files = append(files, af)
-	}
-
-	info := types.Info{
-		Uses: make(map[*ast.Ident]types.Object),
-	}
-	conf := types.Config{
-		Importer: sourceImporter,
-	}
-	_, err := conf.Check(bpkg.Name, fset, files, &info)
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	wd, err := os.Getwd()
-	if err != nil {
-		t.Fatal(err)
-	}
-
-	for id, obj := range info.Uses {
-		if obj.Pkg() != nil && obj.Pkg().Name() == "os" && obj.Name() == "Exit" {
-			pos := fset.Position(id.Pos())
-
-			name, err := filepath.Rel(wd, pos.Filename)
-			if err != nil {
-				t.Log(err)
-				name = pos.Filename
-			}
-			name = filepath.ToSlash(name)
-
-			// Check if the usage is allowed
-			if allowed[name] > 0 {
-				allowed[name]--
-				continue
-			}
-
-			t.Errorf("os.Exit referenced at: %s:%d:%d", name, pos.Line, pos.Column)
-			errOsExit = true
-		}
-	}
-	return errOsExit
-}
-
-// Enforce that src/util.Exit() is used instead of os.Exit by prohibiting
-// references to it anywhere else in the fzf code base.
-func TestOSExitNotAllowed(t *testing.T) {
-	if testing.Short() {
-		t.Skip("skipping: short test")
-	}
-	allowed := map[string]int{
-		"src/util/atexit.go": 1, // os.Exit allowed 1 time in "atexit.go"
-	}
-	var errOsExit bool
-	for _, pkg := range loadPackages(t) {
-		t.Run(pkg.ImportPath, func(t *testing.T) {
-			if checkPackageForOsExit(t, pkg, allowed) {
-				errOsExit = true
-			}
-		})
-	}
-	if t.Failed() && errOsExit {
-		var names []string
-		for name := range allowed {
-			names = append(names, fmt.Sprintf("%q", name))
-		}
-		sort.Strings(names)
-
-		const errMsg = `
-Test failed because os.Exit was referenced outside of the following files:
-
-    %s
-
-Use github.com/junegunn/fzf/src/util.Exit() instead to exit the program.
-This is enforced because calling os.Exit() prevents the functions
-registered with util.AtExit() from running.`
-
-		t.Errorf(errMsg, strings.Join(names, "\n    "))
-	}
-}

man/man1/fzf-tmux.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf-tmux 1 "Apr 2024" "fzf 0.50.0" "fzf-tmux - open fzf in tmux split pane"
+.TH fzf-tmux 1 "Jun 2024" "fzf 0.53.0" "fzf-tmux - open fzf in tmux split pane"
 
 .SH NAME
 fzf-tmux - open fzf in tmux split pane

man/man1/fzf.1

@@ -21,7 +21,7 @@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 THE SOFTWARE.
 ..
-.TH fzf 1 "Apr 2024" "fzf 0.50.0" "fzf - a command-line fuzzy finder"
+.TH fzf 1 "Jun 2024" "fzf 0.53.0" "fzf - a command-line fuzzy finder"
 
 .SH NAME
 fzf - a command-line fuzzy finder
@@ -30,7 +30,10 @@ fzf - a command-line fuzzy finder
 fzf [options]
 
 .SH DESCRIPTION
-fzf is a general-purpose command-line fuzzy finder.
+fzf is an interactive filter program for any kind of list.
+
+It implements a "fuzzy" matching algorithm, so you can quickly type in patterns
+with omitted characters and still get the results you want.
 
 .SH OPTIONS
 .SS Note
@@ -46,10 +49,10 @@ it with \fB+x\fR or \fB--no-extended\fR.
 .B "-e, --exact"
 Enable exact-match
 .TP
-.B "-i"
+.B "-i, --ignore-case"
 Case-insensitive match (default: smart-case match)
 .TP
-.B "+i"
+.B "+i, --no-ignore-case"
 Case-sensitive match
 .TP
 .B "--literal"
@@ -58,14 +61,32 @@ Do not normalize latin script letters for matching.
 .BI "--scheme=" SCHEME
 Choose scoring scheme tailored for different types of input.
 
-.br
-.BR default "  Generic scoring scheme designed to work well with any type of input"
-.br
-.BR path "     Scoring scheme well suited for file paths
-.br
-.BR history "  Scoring scheme well suited for command history or any input where chronological ordering is important
-         Sets \fB--tiebreak=index\fR as well.
-.br
+.RS
+.B default
+.RS
+Generic scoring scheme designed to work well with any type of input.
+.RE
+.RE
+
+.RS
+.B path
+.RS
+Additional bonus point is only given to the characters after path separator.
+You might want to choose this scheme over \fBdefault\fR if you have many files
+with spaces in their paths.
+.RE
+.RE
+
+.RS
+.B history
+.RS
+Scoring scheme well suited for command history or any input where chronological
+ordering is important. No additional bonus points are given so that we give
+more weight to the chronological ordering. This also sets
+\fB--tiebreak=index\fR.
+.RE
+.RE
+
 .TP
 .BI "--algo=" TYPE
 Fuzzy matching algorithm (default: v2)
@@ -85,7 +106,8 @@ See \fBFIELD INDEX EXPRESSION\fR for the details.
 Transform the presentation of each line using field index expressions
 .TP
 .BI "-d, --delimiter=" "STR"
-Field delimiter regex for \fB--nth\fR and \fB--with-nth\fR (default: AWK-style)
+Field delimiter regex for \fB--nth\fR, \fB--with-nth\fR, and field index
+expressions (default: AWK-style)
 .TP
 .BI "--disabled"
 Do not perform search. With this option, fzf becomes a simple selector
@@ -96,6 +118,16 @@ interface rather than a "fuzzy finder". You can later enable the search using
 .B "+s, --no-sort"
 Do not sort the result
 .TP
+.B "--tail=NUM"
+Maximum number of items to keep in memory. This is useful when you want to
+browse an endless stream of data (e.g. log stream) with fzf while limiting
+memory usage.
+.RS
+e.g.
+     \fB# Interactive filtering of a log stream
+     tail -f *.log | fzf --tail 100000 --tac --no-sort --exact\fR
+.RE
+.TP
 .B "--track"
 Make fzf track the current selection when the result list is updated.
 This can be useful when browsing logs using fzf with sorting disabled. It is
@@ -162,13 +194,16 @@ the details.
 .B "--cycle"
 Enable cyclic scroll
 .TP
+.B "--no-multi-line"
+Disable multi-line display of items when using \fB--read0\fR
+.TP
 .B "--keep-right"
 Keep the right end of the line visible when it's too long. Effective only when
 the query string is empty.
 .TP
 .BI "--scroll-off=" "LINES"
 Number of screen lines to keep above or below when scrolling to the top or to
-the bottom (default: 0).
+the bottom (default: 3).
 .TP
 .B "--no-hscroll"
 Disable horizontal scroll
@@ -204,17 +239,41 @@ height minus the given value.
   fzf --height=-1
 
 When prefixed with \fB~\fR, fzf will automatically determine the height in the
-range according to the input size. Note that adaptive height is not compatible
-with top/bottom margin and padding given in percent size. It is also not
-compatible with a negative height value.
+range according to the input size.
 
   # Will not take up 100% of the screen
   seq 5 | fzf --height=~100%
 
+Adaptive height has the following limitations:
+.br
+* Cannot be used with top/bottom margin and padding given in percent size
+.br
+* Negative value is not allowed
+.br
+* It will not find the right size when there are multi-line items
+
 .TP
 .BI "--min-height=" "HEIGHT"
 Minimum height when \fB--height\fR is given in percent (default: 10).
 Ignored when \fB--height\fR is not specified.
+.TP
+.BI "--tmux" "[=[center|top|bottom|left|right][,SIZE[%]][,SIZE[%]]]"
+Start fzf in a tmux popup (default \fBcenter,50%\fR). Requires tmux 3.3 or
+later. This option is ignored if you are not running fzf inside tmux.
+
+e.g.
+  \fB# Popup in the center with 70% width and height
+  fzf --tmux 70%
+
+  # Popup on the left with 40% width and 100% height
+  fzf --tmux right,40%
+
+  # Popup on the bottom with 100% width and 30% height
+  fzf --tmux bottom,30%
+
+  # Popup on the top with 80% width and 40% height
+  fzf --tmux top,80%,40%\fR
+
 .TP
 .BI "--layout=" "LAYOUT"
 Choose the layout (default: default)
@@ -420,10 +479,14 @@ Do not display scrollbar. A synonym for \fB--scrollbar=''\fB
 Input prompt (default: '> ')
 .TP
 .BI "--pointer=" "STR"
-Pointer to the current line (default: '>')
+Pointer to the current line (default: '▌' or '>' depending on \fB--no-unicode\fR)
 .TP
 .BI "--marker=" "STR"
-Multi-select marker (default: '>')
+Multi-select marker (default: '┃' or '>' depending on \fB--no-unicode\fR)
+.TP
+.BI "--marker-multi-line=" "STR"
+Multi-select marker for multi-line entries. 3 elements for top, middle, and bottom.
+(default: '╻┃╹' or '.|'' depending on \fB--no-unicode\fR)
 .TP
 .BI "--header=" "STR"
 The given string will be printed as the sticky header. The lines are displayed
@@ -455,7 +518,7 @@ color mappings.
 
 .RS
 .B BASE SCHEME:
-    (default: dark on 256-color terminal, otherwise 16)
+    (default: \fBdark\fR on 256-color terminal, otherwise \fB16\fR; If \fBNO_COLOR\fR is set, \fBbw\fR)
 
     \fBdark    \fRColor scheme for dark 256-color terminal
     \fBlight   \fRColor scheme for light 256-color terminal
@@ -464,14 +527,17 @@ color mappings.
 
 .B COLOR NAMES:
     \fBfg                  \fRText
+      \fBselected-fg       \fRSelected line text
       \fBpreview-fg        \fRPreview window text
     \fBbg                  \fRBackground
+      \fBselected-bg       \fRSelected line background
       \fBpreview-bg        \fRPreview window background
     \fBhl                  \fRHighlighted substrings
-    \fBfg+                 \fRText (current line)
-    \fBbg+                 \fRBackground (current line)
+      \fBselected-hl       \fRHighlighted substrings in the selected line
+    \fBcurrent-fg (fg+)    \fRText (current line)
+    \fBcurrent-bg (bg+)    \fRBackground (current line)
       \fBgutter            \fRGutter on the left
-    \fBhl+                 \fRHighlighted substrings (current line)
+    \fBcurrent-hl (hl+)    \fRHighlighted substrings (current line)
     \fBquery               \fRQuery string
       \fBdisabled          \fRQuery string when search is disabled (\fB--disabled\fR)
     \fBinfo                \fRInfo line (match counters)
@@ -534,6 +600,9 @@ color mappings.
          --color='pointer:#E12672,marker:#E17899,prompt:#98BEDE,hl+:#98BC99'\fR
 .RE
 .TP
+.B "--highlight-line"
+Highlight the whole current line
+.TP
 .B "--no-bold"
 Do not use bold text
 .TP
@@ -788,6 +857,14 @@ list.
 e.g.
      \fBfzf --expect=ctrl-v,ctrl-t,alt-s --expect=f1,f2,~,@\fR
 .RE
+
+This option is not compatible with \fB--bind\fR on the same key and will take
+precedence over it. To combine the two, use \fBprint\fR action.
+
+.RS
+e.g.
+     \fBfzf --multi --bind 'enter:print()+accept,ctrl-y:select-all+print(ctrl-y)+accept'\fR
+.RE
 .TP
 .B "--read0"
 Read input delimited by ASCII NUL characters instead of newline characters
@@ -812,12 +889,22 @@ e.g.
 .TP
 .B "--sync"
 Synchronous search for multi-staged filtering. If specified, fzf will launch
-ncurses finder only after the input stream is complete.
+the finder only after the input stream is complete.
 
 .RS
 e.g. \fBfzf --multi | fzf --sync\fR
 .RE
 .TP
+.B "--with-shell=STR"
+Shell command and flags to start child processes with. On *nix Systems, the
+default value is \fB$SHELL -c\fR if \fB$SHELL\fR is set, otherwise \fBsh -c\fR.
+On Windows, the default value is \fBcmd /s/c\fR when \fB$SHELL\fR is not
+set.
+
+.RS
+e.g. \fBgem list | fzf --with-shell 'ruby -e' --preview 'pp Gem::Specification.find_by_name({1})'\fR
+.RE
+.TP
 .B "--listen[=[ADDR:]PORT]" "--listen-unsafe[=[ADDR:]PORT]"
 Start HTTP server and listen on the given address. It allows external processes
 to send actions to perform via POST method.
@@ -855,9 +942,16 @@ e.g.
      # Choose port automatically and export it as $FZF_PORT to the child process
      fzf --listen --bind 'start:execute-silent:echo $FZF_PORT > /tmp/fzf-port'
      \fR
+.SS Help
 .TP
 .B "--version"
 Display version information and exit
+.TP
+.B "--help"
+Show help message
+.TP
+.B "--man"
+Show man page
 
 .SS Directory traversal
 .TP
@@ -895,7 +989,7 @@ e.g. \fBeval "$(fzf --bash)"\fR
 .B "--zsh"
 Print script to set up Zsh shell integration
 
-e.g. \fBeval "$(fzf --zsh)"\fR
+e.g. \fBsource <(fzf --zsh)\fR
 
 .TP
 .B "--fish"
@@ -932,6 +1026,10 @@ you need to protect against DNS rebinding and privilege escalation attacks.
 .br
 .BR 2 "      Error"
 .br
+.BR 126 "    Permission denied error from \fBbecome\fR action"
+.br
+.BR 127 "    Invalid shell command for \fBbecome\fR action"
+.br
 .BR 130 "    Interrupted with \fBCTRL-C\fR or \fBESC\fR"
 
 .SH FIELD INDEX EXPRESSION
@@ -972,6 +1070,8 @@ fzf exports the following environment variables to its child processes.
 .br
 .BR FZF_SELECT_COUNT "    Number of selected items"
 .br
+.BR FZF_POS "             Vertical position of the cursor in the list starting from 1"
+.br
 .BR FZF_QUERY "           Current query string"
 .br
 .BR FZF_PROMPT "          Prompt string"
@@ -1264,6 +1364,15 @@ e.g.
      \fBfzf --bind space:jump,jump:accept,jump-cancel:abort\fR
 .RE
 
+\fIclick-header\fR
+.RS
+Triggered when a mouse click occurs within the header. Sets \fBFZF_CLICK_HEADER_LINE\fR and \fBFZF_CLICK_HEADER_COLUMN\fR environment variables starting from 1.
+
+e.g.
+     \fBprintf "head1\\nhead2" | fzf --header-lines=2 --bind 'click-header:transform-prompt:printf ${FZF_CLICK_HEADER_LINE}x${FZF_CLICK_HEADER_COLUMN}'\fR
+
+.RE
+
 .SS AVAILABLE ACTIONS:
 A key or an event can be bound to one or more of the following actions.
 
@@ -1282,6 +1391,8 @@ A key or an event can be bound to one or more of the following actions.
     \fBcancel\fR                       (clear query string if not empty, abort fzf otherwise)
     \fBchange-border-label(...)\fR     (change \fB--border-label\fR to the given string)
     \fBchange-header(...)\fR           (change header to the given string; doesn't affect \fB--header-lines\fR)
+    \fBchange-multi\fR                 (enable multi-select mode with no limit)
+    \fBchange-multi(...)\fR            (enable multi-select mode with a limit or disable it with 0)
     \fBchange-preview(...)\fR          (change \fB--preview\fR option)
     \fBchange-preview-label(...)\fR    (change \fB--preview-label\fR to the given string)
     \fBchange-preview-window(...)\fR   (change \fB--preview-window\fR option; rotate through the multiple option sets separated by '|')
@@ -1331,7 +1442,7 @@ A key or an event can be bound to one or more of the following actions.
     \fBpreview-half-page-up\fR
     \fBpreview-bottom\fR
     \fBpreview-top\fR
-    \fBprint-query\fR                  (print query and exit)
+    \fBprint(...)\fR                   (add string to the output queue and print on exit)
     \fBput\fR                          (put the character to the prompt)
     \fBput(...)\fR                     (put the given string to the prompt)
     \fBrefresh-preview\fR
@@ -1439,8 +1550,6 @@ call.
 
     \fBfzf --bind "enter:become(vim {})"\fR
 
-\fBbecome(...)\fR is not supported on Windows.
-
 .SS RELOAD INPUT
 
 \fBreload(...)\fR action is used to dynamically update the input list

plugin/fzf.vim

@@ -59,12 +59,9 @@ if s:is_win
     return iconv(a:str, &encoding, 'cp'.s:codepage)
   endfunction
   function! s:wrap_cmds(cmds)
-    return map([
-      \ '@echo off',
-      \ 'setlocal enabledelayedexpansion']
+    return map(['@echo off']
     \ + (has('gui_running') ? ['set TERM= > nul'] : [])
-    \ + (type(a:cmds) == type([]) ? a:cmds : [a:cmds])
-    \ + ['endlocal'],
+    \ + (type(a:cmds) == type([]) ? a:cmds : [a:cmds]),
     \ '<SID>enc_to_cp(v:val."\r")')
   endfunction
 else
@@ -84,11 +81,21 @@ else
 endif
 
 function! s:shellesc_cmd(arg)
-  let escaped = substitute(a:arg, '[&|<>()@^]', '^&', 'g')
-  let escaped = substitute(escaped, '%', '%%', 'g')
-  let escaped = substitute(escaped, '"', '\\^&', 'g')
-  let escaped = substitute(escaped, '\(\\\+\)\(\\^\)', '\1\1\2', 'g')
-  return '^"'.substitute(escaped, '\(\\\+\)$', '\1\1', '').'^"'
+  let e = '"'
+  let slashes = 0
+  for c in split(a:arg, '\zs')
+    if c ==# '\'
+      let slashes += 1
+    elseif c ==# '"'
+      let e .= repeat('\', slashes + 1)
+      let slashes = 0
+    else
+      let slashes = 0
+    endif
+    let e .= c
+  endfor
+  let e .= repeat('\', slashes) .'"'
+  return substitute(substitute(e, '[&|<>()^!"]', '^&', 'g'), '%', '%%', 'g')
 endfunction
 
 function! fzf#shellescape(arg, ...)
@@ -320,7 +327,10 @@ function! s:common_sink(action, lines) abort
     " the execution (e.g. `set autochdir` or `autocmd BufEnter * lcd ...`)
     let cwd = exists('w:fzf_pushd') ? w:fzf_pushd.dir : expand('%:p:h')
     for item in a:lines
-      if item[0] != '~' && item !~ (s:is_win ? '^[A-Z]:\' : '^/')
+      if has('win32unix') && item !~ '/'
+        let item = substitute(item, '\', '/', 'g')
+      end
+      if item[0] != '~' && item !~ (s:is_win ? '^\([A-Z]:\)\?\' : '^/')
         let sep = s:is_win ? '\' : '/'
         let item = join([cwd, item], cwd[len(cwd)-1] == sep ? '' : sep)
       endif
@@ -480,6 +490,8 @@ function! s:extract_option(opts, name)
   return opt
 endfunction
 
+let s:need_cmd_window = has('win32unix') && $TERM_PROGRAM ==# 'mintty' && s:compare_versions($TERM_PROGRAM_VERSION, '3.4.5') < 0 && !executable('winpty')
+
 function! fzf#run(...) abort
 try
   let [shell, shellslash, shellcmdflag, shellxquote] = s:use_sh()
@@ -501,19 +513,19 @@ try
   endif
 
   if has_key(dict, 'source')
-    let source = remove(dict, 'source')
+    let source = dict.source
     let type = type(source)
     if type == 1
-      let source_command = source
+      let prefix = '('.source.')|'
     elseif type == 3
       let temps.input = s:fzf_tempname()
       call s:writefile(source, temps.input)
-      let source_command = (s:is_win ? 'type ' : 'cat ').fzf#shellescape(temps.input)
+      let prefix = (s:is_win ? 'type ' : 'command cat ').fzf#shellescape(temps.input).'|'
     else
       throw 'Invalid source type'
     endif
   else
-    let source_command = ''
+    let prefix = ''
   endif
 
   let prefer_tmux = get(g:, 'fzf_prefer_tmux', 0) || has_key(dict, 'tmux')
@@ -522,26 +534,23 @@ try
         \ executable('tput') && filereadable('/dev/tty')
   let has_vim8_term = has('terminal') && has('patch-8.0.995')
   let has_nvim_term = has('nvim-0.2.1') || has('nvim') && !s:is_win
-  let use_term = has_nvim_term ||
-    \ has_vim8_term && !has('win32unix') && (has('gui_running') || s:is_win || s:present(dict, 'down', 'up', 'left', 'right', 'window'))
+  let use_term = has_nvim_term || has_vim8_term
+    \ && !s:need_cmd_window
+    \ && (has('gui_running') || s:is_win || s:present(dict, 'down', 'up', 'left', 'right', 'window'))
   let use_tmux = (has_key(dict, 'tmux') || (!use_height && !use_term || prefer_tmux) && !has('win32unix') && s:splittable(dict)) && s:tmux_enabled()
   if prefer_tmux && use_tmux
     let use_height = 0
     let use_term = 0
   endif
   if use_term
-    let optstr .= ' --no-height'
+    let optstr .= ' --no-height --no-tmux'
   elseif use_height
     let height = s:calc_size(&lines, dict.down, dict)
-    let optstr .= ' --height='.height
+    let optstr .= ' --no-tmux --height='.height
   endif
   " Respect --border option given in $FZF_DEFAULT_OPTS and 'options'
   let optstr = join([s:border_opt(get(dict, 'window', 0)), s:extract_option($FZF_DEFAULT_OPTS, 'border'), optstr])
-  let prev_default_command = $FZF_DEFAULT_COMMAND
-  if len(source_command)
-    let $FZF_DEFAULT_COMMAND = source_command
-  endif
-  let command = (use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
+  let command = prefix.(use_tmux ? s:fzf_tmux(dict) : fzf_exec).' '.optstr.' > '.temps.result
 
   if use_term
     return s:execute_term(dict, command, temps)
@@ -552,14 +561,6 @@ try
   call s:callback(dict, lines)
   return lines
 finally
-  if exists('source_command') && len(source_command)
-    if len(prev_default_command)
-      let $FZF_DEFAULT_COMMAND = prev_default_command
-    else
-      let $FZF_DEFAULT_COMMAND = ''
-      silent! execute 'unlet $FZF_DEFAULT_COMMAND'
-    endif
-  endif
   let [&shell, &shellslash, &shellcmdflag, &shellxquote] = [shell, shellslash, shellcmdflag, shellxquote]
 endtry
 endfunction
@@ -578,19 +579,21 @@ function! s:fzf_tmux(dict)
   if empty(size)
     for o in ['up', 'down', 'left', 'right']
       if s:present(a:dict, o)
-        let spec = a:dict[o]
-        if (o == 'up' || o == 'down') && spec[0] == '~'
-          let size = '-'.o[0].s:calc_size(&lines, spec, a:dict)
-        else
-          " Legacy boolean option
-          let size = '-'.o[0].(spec == 1 ? '' : substitute(spec, '^\~', '', ''))
-        endif
+        let size = o . ',' . a:dict[o]
         break
       endif
     endfor
   endif
-  return printf('LINES=%d COLUMNS=%d %s %s - --',
-    \ &lines, &columns, fzf#shellescape(s:fzf_tmux), size)
+
+  " Legacy fzf-tmux options
+  if size =~ '-'
+    return printf('LINES=%d COLUMNS=%d %s %s %s --',
+          \ &lines, &columns, fzf#shellescape(s:fzf_tmux), size, (has_key(a:dict, 'source') ? '' : '-'))
+  end
+
+  " Using native --tmux option
+  let in = (has_key(a:dict, 'source') ? '' : ' --force-tty-in')
+  return printf('%s --tmux %s%s', fzf#shellescape(fzf#exec()), size, in)
 endfunction
 
 function! s:splittable(dict)
@@ -713,14 +716,15 @@ function! s:execute(dict, command, use_height, temps) abort
       call jobstart(cmd, fzf)
       return []
     endif
-  elseif has('win32unix') && $TERM !=# 'cygwin'
+  elseif s:need_cmd_window
     let shellscript = s:fzf_tempname()
     call s:writefile([command], shellscript)
-    let command = 'cmd.exe /C '.fzf#shellescape('set "TERM=" & start /WAIT sh -c '.shellscript)
+    let command = 'start //WAIT sh -c '.shellscript
     let a:temps.shellscript = shellscript
   endif
   if a:use_height
-    call system(printf('tput cup %d > /dev/tty; tput cnorm > /dev/tty; %s < /dev/tty 2> /dev/tty', &lines, command))
+    let stdin = has_key(a:dict, 'source') ? '' : '< /dev/tty'
+    call system(printf('tput cup %d > /dev/tty; tput cnorm > /dev/tty; %s %s 2> /dev/tty', &lines, command, stdin))
   else
     execute 'silent !'.command
   endif

shell/completion.bash

@@ -4,10 +4,12 @@
 #  / __/ / /_/ __/
 # /_/   /___/_/ completion.bash
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_OPTS          (default: empty)
-# - $FZF_COMPLETION_TRIGGER (default: '**')
-# - $FZF_COMPLETION_OPTS    (default: empty)
+# - $FZF_TMUX                 (default: 0)
+# - $FZF_TMUX_OPTS            (default: empty)
+# - $FZF_COMPLETION_TRIGGER   (default: '**')
+# - $FZF_COMPLETION_OPTS      (default: empty)
+# - $FZF_COMPLETION_PATH_OPTS (default: empty)
+# - $FZF_COMPLETION_DIR_OPTS  (default: empty)
 
 if [[ $- =~ i ]]; then
 
@@ -32,6 +34,14 @@ if [[ $- =~ i ]]; then
 # To redraw line after fzf closes (printf '\e[5n')
 bind '"\e[0n": redraw-current-line' 2> /dev/null
 
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_comprun() {
   if [[ "$(type -t _fzf_comprun 2>&1)" = function ]]; then
     _fzf_comprun "$@"
@@ -91,129 +101,86 @@ _fzf_opts_completion() {
   cur="${COMP_WORDS[COMP_CWORD]}"
   prev="${COMP_WORDS[COMP_CWORD-1]}"
   opts="
-    -h --help
-    -x --extended
-    -e --exact
-    --extended-exact
-    +x --no-extended
-    +e --no-exact
-    -q --query
-    -f --filter
-    --literal
-    --no-literal
-    --algo
-    --scheme
-    --expect
-    --no-expect
-    --enabled --no-phony
-    --disabled --phony
-    --tiebreak
-    --bind
-    --color
-    --toggle-sort
-    -d --delimiter
-    -n --nth
-    --with-nth
-    -s --sort
-    +s --no-sort
-    --track
-    --no-track
-    --tac
-    --no-tac
-    -i
-    +i
-    -m --multi
-    +m --no-multi
-    --ansi
-    --no-ansi
-    --no-mouse
     +c --no-color
-    +2 --no-256
-    --black
-    --no-black
-    --bold
-    --no-bold
-    --layout
-    --reverse
-    --no-reverse
-    --cycle
-    --no-cycle
-    --keep-right
-    --no-keep-right
-    --hscroll
-    --no-hscroll
-    --hscroll-off
-    --scroll-off
-    --filepath-word
-    --no-filepath-word
-    --info
-    --no-info
-    --inline-info
-    --no-inline-info
-    --separator
-    --no-separator
-    --scrollbar
-    --no-scrollbar
-    --jump-labels
-    -1 --select-1
-    +1 --no-select-1
-    -0 --exit-0
-    +0 --no-exit-0
-    --read0
-    --no-read0
-    --print0
-    --no-print0
-    --print-query
-    --no-print-query
-    --prompt
-    --pointer
-    --marker
-    --sync
-    --no-sync
-    --async
-    --no-history
-    --history
-    --history-size
-    --no-header
-    --no-header-lines
-    --header
-    --header-lines
-    --header-first
-    --no-header-first
-    --ellipsis
-    --preview
-    --no-preview
-    --preview-window
-    --height
-    --min-height
-    --no-height
-    --no-margin
-    --no-padding
-    --no-border
+    +i --no-ignore-case
+    +s --no-sort
+    +x --no-extended
+    --ansi
+    --bash
+    --bind
     --border
-    --no-border-label
     --border-label
     --border-label-pos
-    --no-preview-label
+    --color
+    --cycle
+    --disabled
+    --ellipsis
+    --expect
+    --filepath-word
+    --fish
+    --header
+    --header-first
+    --header-lines
+    --height
+    --highlight-line
+    --history
+    --history-size
+    --hscroll-off
+    --info
+    --jump-labels
+    --keep-right
+    --layout
+    --listen
+    --listen-unsafe
+    --literal
+    --man
+    --margin
+    --marker
+    --min-height
+    --no-bold
+    --no-clear
+    --no-hscroll
+    --no-mouse
+    --no-scrollbar
+    --no-separator
+    --no-unicode
+    --padding
+    --pointer
+    --preview
     --preview-label
     --preview-label-pos
-    --no-unicode
-    --unicode
-    --margin
-    --padding
+    --preview-window
+    --print-query
+    --print0
+    --prompt
+    --read0
+    --reverse
+    --scheme
+    --scroll-off
+    --separator
+    --sync
     --tabstop
-    --listen
-    --no-listen
-    --clear
-    --no-clear
+    --tac
+    --tiebreak
+    --tmux
+    --track
     --version
+    --with-nth
+    --with-shell
+    --zsh
+    -0 --exit-0
+    -1 --select-1
+    -d --delimiter
+    -e --exact
+    -f --filter
+    -h --help
+    -i --ignore-case
+    -m --multi
+    -n --nth
+    -q --query
     --"
 
   case "${prev}" in
-  --algo)
-    COMPREPLY=( $(compgen -W "v1 v2" -- "$cur") )
-    return 0
-    ;;
   --scheme)
     COMPREPLY=( $(compgen -W "default path history" -- "$cur") )
     return 0
@@ -335,13 +302,19 @@ __fzf_generic_path_completion() {
         [[ -z "$dir" ]] && dir='.'
         [[ "$dir" != "/" ]] && dir="${dir/%\//}"
         matches=$(
-          unset FZF_DEFAULT_COMMAND
-          export FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $2"
+          export FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-} $2")
+          unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
           if declare -F "$1" > /dev/null; then
             eval "$1 $(printf %q "$dir")" | __fzf_comprun "$4" -q "$leftover"
           else
-            [[ $1 =~ dir ]] && walker=dir,follow || walker=file,dir,follow,hidden
-            __fzf_comprun "$4" -q "$leftover" --walker "$walker" --walker-root="$dir"
+            if [[ $1 =~ dir ]]; then
+              walker=dir,follow
+              rest=${FZF_COMPLETION_DIR_OPTS-}
+            else
+              walker=file,dir,follow,hidden
+              rest=${FZF_COMPLETION_PATH_OPTS-}
+            fi
+            __fzf_comprun "$4" -q "$leftover" --walker "$walker" --walker-root="$dir" $rest
           fi | while read -r item; do
             printf "%q " "${item%$3}$3"
           done
@@ -399,7 +372,10 @@ _fzf_complete() {
   if [[ "$cur" == *"$trigger" ]] && [[ $cur != *'$('* ]] && [[ $cur != *':='* ]] && [[ $cur != *'`'* ]]; then
     cur=${cur:0:${#cur}-${#trigger}}
 
-    selected=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | command tr '\n' ' ')
+    selected=$(
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
+      FZF_DEFAULT_OPTS_FILE='' \
+        __fzf_comprun "${rest[0]}" "${args[@]}" -q "$cur" | $post | command tr '\n' ' ')
     selected=${selected% } # Strip trailing space not to repeat "-o nospace"
     if [[ -n "$selected" ]]; then
       COMPREPLY=("$selected")
@@ -503,8 +479,11 @@ complete -o default -F _fzf_opts_completion fzf
 # fzf-tmux specific options (like `-w WIDTH`) are left as a future patch.
 complete -o default -F _fzf_opts_completion fzf-tmux
 
-d_cmds="${FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir}"
-a_cmds="
+d_cmds="${FZF_COMPLETION_DIR_COMMANDS-cd pushd rmdir}"
+
+# NOTE: $FZF_COMPLETION_PATH_COMMANDS and $FZF_COMPLETION_VAR_COMMANDS are
+# undocumented and subject to change in the future.
+a_cmds="${FZF_COMPLETION_PATH_COMMANDS-"
   awk bat cat diff diff3
   emacs emacsclient ex file ftp g++ gcc gvim head hg hx java
   javac ld less more mvim nvim patch perl python ruby
@@ -512,10 +491,11 @@ a_cmds="
   basename bunzip2 bzip2 chmod chown curl cp dirname du
   find git grep gunzip gzip hg jar
   ln ls mv open rm rsync scp
-  svn tar unzip zip"
+  svn tar unzip zip"}"
+v_cmds="${FZF_COMPLETION_VAR_COMMANDS-export unset printenv}"
 
 # Preserve existing completion
-__fzf_orig_completion < <(complete -p $d_cmds $a_cmds ssh 2> /dev/null)
+__fzf_orig_completion < <(complete -p $d_cmds $a_cmds $v_cmds unalias kill ssh 2> /dev/null)
 
 if type _comp_load > /dev/null 2>&1; then
   # _comp_load was added in bash-completion 2.12 to replace _completion_loader.
@@ -551,10 +531,21 @@ for cmd in $d_cmds; do
   __fzf_defc "$cmd" _fzf_dir_completion "-o bashdefault -o nospace -o dirnames"
 done
 
+# Variables
+for cmd in $v_cmds; do
+  __fzf_defc "$cmd" _fzf_var_completion "-o default -o nospace -v"
+done
+
+# Aliases
+__fzf_defc unalias _fzf_alias_completion "-a"
+
+# Processes
+__fzf_defc kill _fzf_proc_completion "-o default -o bashdefault"
+
 # ssh
 __fzf_defc ssh _fzf_complete_ssh "-o default -o bashdefault"
 
-unset cmd d_cmds a_cmds
+unset cmd d_cmds a_cmds v_cmds
 
 _fzf_setup_completion() {
   local kind fn cmd
@@ -576,10 +567,4 @@ _fzf_setup_completion() {
   done
 }
 
-# Environment variables / Aliases / Hosts / Process
-_fzf_setup_completion 'var'   export unset printenv
-_fzf_setup_completion 'alias' unalias
-_fzf_setup_completion 'host'  telnet
-_fzf_setup_completion 'proc'  kill
-
 fi

shell/completion.zsh

@@ -4,12 +4,12 @@
 #  / __/ / /_/ __/
 # /_/   /___/_/ completion.zsh
 #
-# - $FZF_TMUX               (default: 0)
-# - $FZF_TMUX_OPTS          (default: '-d 40%')
-# - $FZF_COMPLETION_TRIGGER (default: '**')
-# - $FZF_COMPLETION_OPTS    (default: empty)
-
-if [[ -o interactive ]]; then
+# - $FZF_TMUX                 (default: 0)
+# - $FZF_TMUX_OPTS            (default: empty)
+# - $FZF_COMPLETION_TRIGGER   (default: '**')
+# - $FZF_COMPLETION_OPTS      (default: empty)
+# - $FZF_COMPLETION_PATH_OPTS (default: empty)
+# - $FZF_COMPLETION_DIR_OPTS  (default: empty)
 
 
 # Both branches of the following `if` do the same thing -- define
@@ -75,6 +75,9 @@ fi
 # This brace is the start of try-always block. The `always` part is like
 # `finally` in lesser languages. We use it to *always* restore user options.
 {
+# The 'emulate' command should not be placed inside the interactive if check;
+# placing it there fails to disable alias expansion. See #3731.
+if [[ -o interactive ]]; then
 
 # To use custom commands instead of find, override _fzf_compgen_{path,dir}
 #
@@ -93,6 +96,14 @@ fi
 
 ###########################################################
 
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_comprun() {
   if [[ "$(type _fzf_comprun 2>&1)" =~ function ]]; then
     _fzf_comprun "$@"
@@ -146,13 +157,19 @@ __fzf_generic_path_completion() {
       [ -z "$dir" ] && dir='.'
       [ "$dir" != "/" ] && dir="${dir/%\//}"
       matches=$(
-        unset FZF_DEFAULT_COMMAND
-        export FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-}"
+        export FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --scheme=path" "${FZF_COMPLETION_OPTS-}")
+        unset FZF_DEFAULT_COMMAND FZF_DEFAULT_OPTS_FILE
         if declare -f "$compgen" > /dev/null; then
           eval "$compgen $(printf %q "$dir")" | __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover"
         else
-          [[ $compgen =~ dir ]] && walker=dir,follow || walker=file,dir,follow,hidden
-          __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" --walker "$walker" --walker-root="$dir" < /dev/tty
+          if [[ $compgen =~ dir ]]; then
+            walker=dir,follow
+            rest=${FZF_COMPLETION_DIR_OPTS-}
+          else
+            walker=file,dir,follow,hidden
+            rest=${FZF_COMPLETION_PATH_OPTS-}
+          fi
+          __fzf_comprun "$cmd" ${(Q)${(Z+n+)fzf_opts}} -q "$leftover" --walker "$walker" --walker-root="$dir" ${(Q)${(Z+n+)rest}} < /dev/tty
         fi | while read item; do
           item="${item%$suffix}$suffix"
           echo -n "${(q)item} "
@@ -217,7 +234,10 @@ _fzf_complete() {
   type $post > /dev/null 2>&1 || post=cat
 
   _fzf_feed_fifo "$fifo"
-  matches=$(FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_COMPLETION_OPTS-} $str_arg" __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
+  matches=$(
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse" "${FZF_COMPLETION_OPTS-} $str_arg") \
+    FZF_DEFAULT_OPTS_FILE='' \
+      __fzf_comprun "$cmd" "${args[@]}" -q "${(Q)prefix}" < "$fifo" | $post | tr '\n' ' ')
   if [ -n "$matches" ]; then
     LBUFFER="$lbuf$matches"
   fi
@@ -315,7 +335,7 @@ fzf-completion() {
 
   # Trigger sequence given
   if [ ${#tokens} -gt 1 -a "$tail" = "$trigger" ]; then
-    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS:-cd pushd rmdir})
+    d_cmds=(${=FZF_COMPLETION_DIR_COMMANDS-cd pushd rmdir})
 
     [ -z "$trigger"      ] && prefix=${tokens[-1]} || prefix=${tokens[-1]:0:-${#trigger}}
     if [[ $prefix = *'$('* ]] || [[ $prefix = *'<('* ]] || [[ $prefix = *'>('* ]] || [[ $prefix = *':='* ]] || [[ $prefix = *'`'* ]]; then
@@ -345,11 +365,10 @@ fzf-completion() {
 
 zle     -N   fzf-completion
 bindkey '^I' fzf-completion
+fi
 
 } always {
   # Restore the original options.
   eval $__fzf_completion_options
   'unset' '__fzf_completion_options'
 }
-
-fi

shell/key-bindings.bash

@@ -16,10 +16,19 @@ if [[ $- =~ i ]]; then
 
 # Key bindings
 # ------------
+
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
+
 __fzf_select__() {
-  local opts
-  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse --walker=file,dir,follow,hidden --scheme=path ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-} -m"
-  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) "$@" |
+  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} \
+  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path" "${FZF_CTRL_T_OPTS-} -m") \
+  FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) "$@" |
     while read -r item; do
       printf '%q ' "$item"  # escape special chars
     done
@@ -37,25 +46,26 @@ fzf-file-widget() {
 }
 
 __fzf_cd__() {
-  local opts dir
-  opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore --reverse --walker=dir,follow,hidden --scheme=path ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-} +m"
+  local dir
   dir=$(
-    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} FZF_DEFAULT_OPTS="$opts" $(__fzfcmd)
+    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} \
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path" "${FZF_ALT_C_OPTS-} +m") \
+    FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd)
   ) && printf 'builtin cd -- %q' "$(builtin unset CDPATH && builtin cd -- "$dir" && builtin pwd)"
 }
 
 if command -v perl > /dev/null; then
   __fzf_history__() {
-    local output opts script
-    opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
-    script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
+    local output script
+    script='BEGIN { getc; $/ = "\n\t"; $HISTCOUNT = $ENV{last_hist} + 1 } s/^[ *]//; s/\n/\n\t/gm; print $HISTCOUNT - $. . "\t$_" if !$seen{$_}++'
     output=$(
       set +o pipefail
       builtin fc -lnr -2147483648 |
         last_hist=$(HISTTIMEFORMAT='' builtin history 1) command perl -n -l0 -e "$script" |
-        FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
     ) || return
-    READLINE_LINE=${output#*$'\t'}
+    READLINE_LINE=$(command perl -pe 's/^\d*\t//' <<< "$output")
     if [[ -z "$READLINE_POINT" ]]; then
       echo "$READLINE_LINE"
     else
@@ -64,14 +74,13 @@ if command -v perl > /dev/null; then
   }
 else # awk - fallback for POSIX systems
   __fzf_history__() {
-    local output opts script n x y z d
+    local output script n x y z d
     if [[ -z $__fzf_awk ]]; then
       __fzf_awk=awk
       # choose the faster mawk if: it's installed && build date >= 20230322 && version >= 1.3.4
       IFS=' .' read n x y z d <<< $(command mawk -W version 2> /dev/null)
       [[ $n == mawk ]] && (( d >= 20230302 && (x *1000 +y) *1000 +z >= 1003004 )) && __fzf_awk=mawk
     fi
-    opts="--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort ${FZF_CTRL_R_OPTS-} +m --read0"
     [[ $(HISTTIMEFORMAT='' builtin history 1) =~ [[:digit:]]+ ]]    # how many history entries
     script='function P(b) { ++n; sub(/^[ *]/, "", b); if (!seen[b]++) { printf "%d\t%s%c", '$((BASH_REMATCH + 1))' - n, b, 0 } }
     NR==1 { b = substr($0, 2); next }
@@ -82,7 +91,8 @@ else # awk - fallback for POSIX systems
       set +o pipefail
       builtin fc -lnr -2147483648 2> /dev/null |   # ( $'\t '<lines>$'\n' )* ; <lines> ::= [^\n]* ( $'\n'<lines> )*
         command $__fzf_awk "$script"           |   # ( <counter>$'\t'<lines>$'\000' )*
-        FZF_DEFAULT_OPTS="$opts" $(__fzfcmd) --query "$READLINE_LINE"
+        FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --highlight-line ${FZF_CTRL_R_OPTS-} +m --read0") \
+        FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) --query "$READLINE_LINE"
     ) || return
     READLINE_LINE=${output#*$'\t'}
     if [[ -z "$READLINE_POINT" ]]; then

shell/key-bindings.fish

@@ -18,6 +18,15 @@ status is-interactive; or exit 0
 # ------------
 function fzf_key_bindings
 
+  function __fzf_defaults
+    # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+    test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
+    echo "--height $FZF_TMUX_HEIGHT --bind=ctrl-z:ignore" $argv[1]
+    command cat "$FZF_DEFAULT_OPTS_FILE" 2> /dev/null
+    echo $FZF_DEFAULT_OPTS $argv[2]
+  end
+
   # Store current token in $dir as root for the 'find' command
   function fzf-file-widget -d "List files and folders"
     set -l commandline (__fzf_parse_commandline)
@@ -27,8 +36,9 @@ function fzf_key_bindings
 
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --walker=file,dir,follow,hidden --walker-root='$dir' --scheme=path --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_CTRL_T_OPTS"
+      set -lx FZF_DEFAULT_OPTS (__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path --walker-root='$dir'" "$FZF_CTRL_T_OPTS")
       set -lx FZF_DEFAULT_COMMAND "$FZF_CTRL_T_COMMAND"
+      set -lx FZF_DEFAULT_OPTS_FILE ''
       eval (__fzfcmd)' -m --query "'$fzf_query'"' | while read -l r; set result $result $r; end
     end
     if [ -z "$result" ]
@@ -49,8 +59,6 @@ function fzf_key_bindings
   function fzf-history-widget -d "Show command history"
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT $FZF_DEFAULT_OPTS --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore $FZF_CTRL_R_OPTS +m"
-
       set -l FISH_MAJOR (echo $version | cut -f1 -d.)
       set -l FISH_MINOR (echo $version | cut -f2 -d.)
 
@@ -58,10 +66,19 @@ function fzf_key_bindings
       # history's -z flag was added in fish 2.4.0, so don't use it for versions
       # before 2.4.0.
       if [ "$FISH_MAJOR" -gt 2 -o \( "$FISH_MAJOR" -eq 2 -a "$FISH_MINOR" -ge 4 \) ];
-        history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
-        and commandline -- $result
+        if type -P perl > /dev/null 2>&1
+          set -lx FZF_DEFAULT_OPTS (__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --highlight-line $FZF_CTRL_R_OPTS +m")
+          set -lx FZF_DEFAULT_OPTS_FILE ''
+          builtin history -z --reverse | command perl -0 -pe 's/^/$.\t/g; s/\n/\n\t/gm' | eval (__fzfcmd) --tac --read0 --print0 -q '(commandline)' | command perl -pe 's/^\d*\t//' | read -lz result
+          and commandline -- $result
+        else
+          set -lx FZF_DEFAULT_OPTS (__fzf_defaults "" "--scheme=history --bind=ctrl-r:toggle-sort --highlight-line $FZF_CTRL_R_OPTS +m")
+          set -lx FZF_DEFAULT_OPTS_FILE ''
+          builtin history -z | eval (__fzfcmd) --read0 --print0 -q '(commandline)' | read -lz result
+          and commandline -- $result
+        end
       else
-        history | eval (__fzfcmd) -q '(commandline)' | read -l result
+        builtin history | eval (__fzfcmd) -q '(commandline)' | read -l result
         and commandline -- $result
       end
     end
@@ -76,12 +93,13 @@ function fzf_key_bindings
 
     test -n "$FZF_TMUX_HEIGHT"; or set FZF_TMUX_HEIGHT 40%
     begin
-      set -lx FZF_DEFAULT_OPTS "--height $FZF_TMUX_HEIGHT --reverse --walker=dir,follow,hidden --walker-root='$dir' --scheme=path --bind=ctrl-z:ignore $FZF_DEFAULT_OPTS $FZF_ALT_C_OPTS"
+      set -lx FZF_DEFAULT_OPTS (__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path --walker-root='$dir'" "$FZF_ALT_C_OPTS")
+      set -lx FZF_DEFAULT_OPTS_FILE ''
       set -lx FZF_DEFAULT_COMMAND "$FZF_ALT_C_COMMAND"
       eval (__fzfcmd)' +m --query "'$fzf_query'"' | read -l result
 
       if [ -n "$result" ]
-        cd -- $result
+        builtin cd -- $result
 
         # Remove last token from commandline.
         commandline -t ""

shell/key-bindings.zsh

@@ -11,8 +11,6 @@
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
 
-if [[ -o interactive ]]; then
-
 
 # Key bindings
 # ------------
@@ -38,12 +36,23 @@ fi
 'builtin' 'emulate' 'zsh' && 'builtin' 'setopt' 'no_aliases'
 
 {
+if [[ -o interactive ]]; then
+
+__fzf_defaults() {
+  # $1: Prepend to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  # $2: Append to FZF_DEFAULT_OPTS_FILE and FZF_DEFAULT_OPTS
+  echo "--height ${FZF_TMUX_HEIGHT:-40%} --bind=ctrl-z:ignore $1"
+  command cat "${FZF_DEFAULT_OPTS_FILE-}" 2> /dev/null
+  echo "${FZF_DEFAULT_OPTS-} $2"
+}
 
 # CTRL-T - Paste the selected file path(s) into the command line
-__fsel() {
+__fzf_select() {
   setopt localoptions pipefail no_aliases 2> /dev/null
   local item
-  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --walker=file,dir,follow,hidden --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_CTRL_T_OPTS-}" $(__fzfcmd) -m "$@" < /dev/tty | while read item; do
+  FZF_DEFAULT_COMMAND=${FZF_CTRL_T_COMMAND:-} \
+  FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=file,dir,follow,hidden --scheme=path" "${FZF_CTRL_T_OPTS-} -m") \
+  FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) "$@" < /dev/tty | while read item; do
     echo -n "${(q)item} "
   done
   local ret=$?
@@ -57,7 +66,7 @@ __fzfcmd() {
 }
 
 fzf-file-widget() {
-  LBUFFER="${LBUFFER}$(__fsel)"
+  LBUFFER="${LBUFFER}$(__fzf_select)"
   local ret=$?
   zle reset-prompt
   return $ret
@@ -72,7 +81,10 @@ fi
 # ALT-C - cd into the selected directory
 fzf-cd-widget() {
   setopt localoptions pipefail no_aliases 2> /dev/null
-  local dir="$(FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} --reverse --walker=dir,follow,hidden --scheme=path --bind=ctrl-z:ignore ${FZF_DEFAULT_OPTS-} ${FZF_ALT_C_OPTS-}" $(__fzfcmd) +m < /dev/tty)"
+  local dir="$(
+    FZF_DEFAULT_COMMAND=${FZF_ALT_C_COMMAND:-} \
+    FZF_DEFAULT_OPTS=$(__fzf_defaults "--reverse --walker=dir,follow,hidden --scheme=path" "${FZF_ALT_C_OPTS-} +m") \
+    FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd) < /dev/tty)"
   if [[ -z "$dir" ]]; then
     zle redisplay
     return 0
@@ -96,13 +108,22 @@ fi
 fzf-history-widget() {
   local selected num
   setopt localoptions noglobsubst noposixbuiltins pipefail no_aliases 2> /dev/null
-  selected="$(fc -rl 1 | awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
-    FZF_DEFAULT_OPTS="--height ${FZF_TMUX_HEIGHT:-40%} ${FZF_DEFAULT_OPTS-} -n2..,.. --scheme=history --bind=ctrl-r:toggle-sort,ctrl-z:ignore ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m" $(__fzfcmd))"
+  # Ensure the associative history array, which maps event numbers to the full
+  # history lines, is loaded, and that Perl is installed for multi-line output.
+  if zmodload -F zsh/parameter p:history 2>/dev/null && (( ${#commands[perl]} )); then
+    selected="$(printf '%1$s\t%2$s\000' "${(vk)history[@]}" |
+      perl -0 -ne 'if (!$seen{(/^\s*[0-9]+\**\s+(.*)/, $1)}++) { s/\n/\n\t/gm; print; }' |
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m --read0") \
+      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
+  else
+    selected="$(fc -rl 1 | awk '{ cmd=$0; sub(/^[ \t]*[0-9]+\**[ \t]+/, "", cmd); if (!seen[cmd]++) print $0 }' |
+      FZF_DEFAULT_OPTS=$(__fzf_defaults "" "-n2..,.. --scheme=history --bind=ctrl-r:toggle-sort --highlight-line ${FZF_CTRL_R_OPTS-} --query=${(qqq)LBUFFER} +m") \
+      FZF_DEFAULT_OPTS_FILE='' $(__fzfcmd))"
+  fi
   local ret=$?
   if [ -n "$selected" ]; then
-    num=$(awk '{print $1}' <<< "$selected")
-    if [[ "$num" =~ '^[1-9][0-9]*\*?$' ]]; then
-      zle vi-fetch-history -n ${num%\*}
+    if num=$(awk '{print $1; exit}' <<< "$selected" | grep -o '^[1-9][0-9]*'); then
+      zle vi-fetch-history -n $num
     else # selected is a custom query, not from history
       LBUFFER="$selected"
     fi
@@ -114,10 +135,9 @@ zle     -N            fzf-history-widget
 bindkey -M emacs '^R' fzf-history-widget
 bindkey -M vicmd '^R' fzf-history-widget
 bindkey -M viins '^R' fzf-history-widget
+fi
 
 } always {
   eval $__fzf_key_bindings_options
   'unset' '__fzf_key_bindings_options'
 }
-
-fi

src/actiontype_string.go

@@ -26,102 +26,105 @@ func _() {
 	_ = x[actCancel-15]
 	_ = x[actChangeBorderLabel-16]
 	_ = x[actChangeHeader-17]
-	_ = x[actChangePreviewLabel-18]
-	_ = x[actChangePrompt-19]
-	_ = x[actChangeQuery-20]
-	_ = x[actClearScreen-21]
-	_ = x[actClearQuery-22]
-	_ = x[actClearSelection-23]
-	_ = x[actClose-24]
-	_ = x[actDeleteChar-25]
-	_ = x[actDeleteCharEof-26]
-	_ = x[actEndOfLine-27]
-	_ = x[actForwardChar-28]
-	_ = x[actForwardWord-29]
-	_ = x[actKillLine-30]
-	_ = x[actKillWord-31]
-	_ = x[actUnixLineDiscard-32]
-	_ = x[actUnixWordRubout-33]
-	_ = x[actYank-34]
-	_ = x[actBackwardKillWord-35]
-	_ = x[actSelectAll-36]
-	_ = x[actDeselectAll-37]
-	_ = x[actToggle-38]
-	_ = x[actToggleSearch-39]
-	_ = x[actToggleAll-40]
-	_ = x[actToggleDown-41]
-	_ = x[actToggleUp-42]
-	_ = x[actToggleIn-43]
-	_ = x[actToggleOut-44]
-	_ = x[actToggleTrack-45]
-	_ = x[actToggleTrackCurrent-46]
-	_ = x[actToggleHeader-47]
-	_ = x[actTrackCurrent-48]
-	_ = x[actUntrackCurrent-49]
-	_ = x[actDown-50]
-	_ = x[actUp-51]
-	_ = x[actPageUp-52]
-	_ = x[actPageDown-53]
-	_ = x[actPosition-54]
-	_ = x[actHalfPageUp-55]
-	_ = x[actHalfPageDown-56]
-	_ = x[actOffsetUp-57]
-	_ = x[actOffsetDown-58]
-	_ = x[actJump-59]
-	_ = x[actJumpAccept-60]
-	_ = x[actPrintQuery-61]
-	_ = x[actRefreshPreview-62]
-	_ = x[actReplaceQuery-63]
-	_ = x[actToggleSort-64]
-	_ = x[actShowPreview-65]
-	_ = x[actHidePreview-66]
-	_ = x[actTogglePreview-67]
-	_ = x[actTogglePreviewWrap-68]
-	_ = x[actTransform-69]
-	_ = x[actTransformBorderLabel-70]
-	_ = x[actTransformHeader-71]
-	_ = x[actTransformPreviewLabel-72]
-	_ = x[actTransformPrompt-73]
-	_ = x[actTransformQuery-74]
-	_ = x[actPreview-75]
-	_ = x[actChangePreview-76]
-	_ = x[actChangePreviewWindow-77]
-	_ = x[actPreviewTop-78]
-	_ = x[actPreviewBottom-79]
-	_ = x[actPreviewUp-80]
-	_ = x[actPreviewDown-81]
-	_ = x[actPreviewPageUp-82]
-	_ = x[actPreviewPageDown-83]
-	_ = x[actPreviewHalfPageUp-84]
-	_ = x[actPreviewHalfPageDown-85]
-	_ = x[actPrevHistory-86]
-	_ = x[actPrevSelected-87]
-	_ = x[actPut-88]
-	_ = x[actNextHistory-89]
-	_ = x[actNextSelected-90]
-	_ = x[actExecute-91]
-	_ = x[actExecuteSilent-92]
-	_ = x[actExecuteMulti-93]
-	_ = x[actSigStop-94]
-	_ = x[actFirst-95]
-	_ = x[actLast-96]
-	_ = x[actReload-97]
-	_ = x[actReloadSync-98]
-	_ = x[actDisableSearch-99]
-	_ = x[actEnableSearch-100]
-	_ = x[actSelect-101]
-	_ = x[actDeselect-102]
-	_ = x[actUnbind-103]
-	_ = x[actRebind-104]
-	_ = x[actBecome-105]
-	_ = x[actResponse-106]
-	_ = x[actShowHeader-107]
-	_ = x[actHideHeader-108]
+	_ = x[actChangeMulti-18]
+	_ = x[actChangePreviewLabel-19]
+	_ = x[actChangePrompt-20]
+	_ = x[actChangeQuery-21]
+	_ = x[actClearScreen-22]
+	_ = x[actClearQuery-23]
+	_ = x[actClearSelection-24]
+	_ = x[actClose-25]
+	_ = x[actDeleteChar-26]
+	_ = x[actDeleteCharEof-27]
+	_ = x[actEndOfLine-28]
+	_ = x[actFatal-29]
+	_ = x[actForwardChar-30]
+	_ = x[actForwardWord-31]
+	_ = x[actKillLine-32]
+	_ = x[actKillWord-33]
+	_ = x[actUnixLineDiscard-34]
+	_ = x[actUnixWordRubout-35]
+	_ = x[actYank-36]
+	_ = x[actBackwardKillWord-37]
+	_ = x[actSelectAll-38]
+	_ = x[actDeselectAll-39]
+	_ = x[actToggle-40]
+	_ = x[actToggleSearch-41]
+	_ = x[actToggleAll-42]
+	_ = x[actToggleDown-43]
+	_ = x[actToggleUp-44]
+	_ = x[actToggleIn-45]
+	_ = x[actToggleOut-46]
+	_ = x[actToggleTrack-47]
+	_ = x[actToggleTrackCurrent-48]
+	_ = x[actToggleHeader-49]
+	_ = x[actTrackCurrent-50]
+	_ = x[actUntrackCurrent-51]
+	_ = x[actDown-52]
+	_ = x[actUp-53]
+	_ = x[actPageUp-54]
+	_ = x[actPageDown-55]
+	_ = x[actPosition-56]
+	_ = x[actHalfPageUp-57]
+	_ = x[actHalfPageDown-58]
+	_ = x[actOffsetUp-59]
+	_ = x[actOffsetDown-60]
+	_ = x[actJump-61]
+	_ = x[actJumpAccept-62]
+	_ = x[actPrintQuery-63]
+	_ = x[actRefreshPreview-64]
+	_ = x[actReplaceQuery-65]
+	_ = x[actToggleSort-66]
+	_ = x[actShowPreview-67]
+	_ = x[actHidePreview-68]
+	_ = x[actTogglePreview-69]
+	_ = x[actTogglePreviewWrap-70]
+	_ = x[actTransform-71]
+	_ = x[actTransformBorderLabel-72]
+	_ = x[actTransformHeader-73]
+	_ = x[actTransformPreviewLabel-74]
+	_ = x[actTransformPrompt-75]
+	_ = x[actTransformQuery-76]
+	_ = x[actPreview-77]
+	_ = x[actChangePreview-78]
+	_ = x[actChangePreviewWindow-79]
+	_ = x[actPreviewTop-80]
+	_ = x[actPreviewBottom-81]
+	_ = x[actPreviewUp-82]
+	_ = x[actPreviewDown-83]
+	_ = x[actPreviewPageUp-84]
+	_ = x[actPreviewPageDown-85]
+	_ = x[actPreviewHalfPageUp-86]
+	_ = x[actPreviewHalfPageDown-87]
+	_ = x[actPrevHistory-88]
+	_ = x[actPrevSelected-89]
+	_ = x[actPrint-90]
+	_ = x[actPut-91]
+	_ = x[actNextHistory-92]
+	_ = x[actNextSelected-93]
+	_ = x[actExecute-94]
+	_ = x[actExecuteSilent-95]
+	_ = x[actExecuteMulti-96]
+	_ = x[actSigStop-97]
+	_ = x[actFirst-98]
+	_ = x[actLast-99]
+	_ = x[actReload-100]
+	_ = x[actReloadSync-101]
+	_ = x[actDisableSearch-102]
+	_ = x[actEnableSearch-103]
+	_ = x[actSelect-104]
+	_ = x[actDeselect-105]
+	_ = x[actUnbind-106]
+	_ = x[actRebind-107]
+	_ = x[actBecome-108]
+	_ = x[actResponse-109]
+	_ = x[actShowHeader-110]
+	_ = x[actHideHeader-111]
 }
 
-const _actionType_name = "actIgnoreactStartactClickactInvalidactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeHeaderactChangePreviewLabelactChangePromptactChangeQueryactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactTrackCurrentactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformHeaderactTransformPreviewLabelactTransformPromptactTransformQueryactPreviewactChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactBecomeactResponseactShowHeaderactHideHeader"
+const _actionType_name = "actIgnoreactStartactClickactInvalidactCharactMouseactBeginningOfLineactAbortactAcceptactAcceptNonEmptyactAcceptOrPrintQueryactBackwardCharactBackwardDeleteCharactBackwardDeleteCharEofactBackwardWordactCancelactChangeBorderLabelactChangeHeaderactChangeMultiactChangePreviewLabelactChangePromptactChangeQueryactClearScreenactClearQueryactClearSelectionactCloseactDeleteCharactDeleteCharEofactEndOfLineactFatalactForwardCharactForwardWordactKillLineactKillWordactUnixLineDiscardactUnixWordRuboutactYankactBackwardKillWordactSelectAllactDeselectAllactToggleactToggleSearchactToggleAllactToggleDownactToggleUpactToggleInactToggleOutactToggleTrackactToggleTrackCurrentactToggleHeaderactTrackCurrentactUntrackCurrentactDownactUpactPageUpactPageDownactPositionactHalfPageUpactHalfPageDownactOffsetUpactOffsetDownactJumpactJumpAcceptactPrintQueryactRefreshPreviewactReplaceQueryactToggleSortactShowPreviewactHidePreviewactTogglePreviewactTogglePreviewWrapactTransformactTransformBorderLabelactTransformHeaderactTransformPreviewLabelactTransformPromptactTransformQueryactPreviewactChangePreviewactChangePreviewWindowactPreviewTopactPreviewBottomactPreviewUpactPreviewDownactPreviewPageUpactPreviewPageDownactPreviewHalfPageUpactPreviewHalfPageDownactPrevHistoryactPrevSelectedactPrintactPutactNextHistoryactNextSelectedactExecuteactExecuteSilentactExecuteMultiactSigStopactFirstactLastactReloadactReloadSyncactDisableSearchactEnableSearchactSelectactDeselectactUnbindactRebindactBecomeactResponseactShowHeaderactHideHeader"
 
-var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 42, 50, 68, 76, 85, 102, 123, 138, 159, 183, 198, 207, 227, 242, 263, 278, 292, 306, 319, 336, 344, 357, 373, 385, 399, 413, 424, 435, 453, 470, 477, 496, 508, 522, 531, 546, 558, 571, 582, 593, 605, 619, 640, 655, 670, 687, 694, 699, 708, 719, 730, 743, 758, 769, 782, 789, 802, 815, 832, 847, 860, 874, 888, 904, 924, 936, 959, 977, 1001, 1019, 1036, 1046, 1062, 1084, 1097, 1113, 1125, 1139, 1155, 1173, 1193, 1215, 1229, 1244, 1250, 1264, 1279, 1289, 1305, 1320, 1330, 1338, 1345, 1354, 1367, 1383, 1398, 1407, 1418, 1427, 1436, 1445, 1456, 1469, 1482}
+var _actionType_index = [...]uint16{0, 9, 17, 25, 35, 42, 50, 68, 76, 85, 102, 123, 138, 159, 183, 198, 207, 227, 242, 256, 277, 292, 306, 320, 333, 350, 358, 371, 387, 399, 407, 421, 435, 446, 457, 475, 492, 499, 518, 530, 544, 553, 568, 580, 593, 604, 615, 627, 641, 662, 677, 692, 709, 716, 721, 730, 741, 752, 765, 780, 791, 804, 811, 824, 837, 854, 869, 882, 896, 910, 926, 946, 958, 981, 999, 1023, 1041, 1058, 1068, 1084, 1106, 1119, 1135, 1147, 1161, 1177, 1195, 1215, 1237, 1251, 1266, 1274, 1280, 1294, 1309, 1319, 1335, 1350, 1360, 1368, 1375, 1384, 1397, 1413, 1428, 1437, 1448, 1457, 1466, 1475, 1486, 1499, 1512}
 
 func (i actionType) String() string {
 	if i < 0 || i >= actionType(len(_actionType_index)-1) {

src/algo/algo.go

@@ -152,7 +152,7 @@ var (
 	// Extra bonus for word boundary after slash, colon, semi-colon, and comma
 	bonusBoundaryDelimiter int16 = bonusBoundary + 1
 
-	initialCharClass charClass = charWhite
+	initialCharClass = charWhite
 
 	// A minor optimization that can give 15%+ performance boost
 	asciiCharClasses [unicode.MaxASCII + 1]charClass

src/algo/normalize.go

@@ -3,7 +3,7 @@
 
 package algo
 
-var normalized map[rune]rune = map[rune]rune{
+var normalized = map[rune]rune{
 	0x00E1: 'a', //  WITH ACUTE, LATIN SMALL LETTER
 	0x0103: 'a', //  WITH BREVE, LATIN SMALL LETTER
 	0x01CE: 'a', //  WITH CARON, LATIN SMALL LETTER

src/ansi.go

@@ -292,7 +292,7 @@ func extractColor(str string, state *ansiState, proc func(string, *ansiState) bo
 
 func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
 	var remaining string
-	i := -1
+	var i int
 	if delimiter == 0 {
 		// Faster than strings.IndexAny(";:")
 		i = strings.IndexByte(s, ';')
@@ -312,7 +312,7 @@ func parseAnsiCode(s string, delimiter byte) (int, byte, string) {
 		// Inlined version of strconv.Atoi() that only handles positive
 		// integers and does not allocate on error.
 		code := 0
-		for _, ch := range sbytes(s) {
+		for _, ch := range stringBytes(s) {
 			ch -= '0'
 			if ch > 9 {
 				return -1, delimiter, remaining
@@ -350,7 +350,7 @@ func interpretCode(ansiCode string, prevState *ansiState) ansiState {
 	state256 := 0
 	ptr := &state.fg
 
-	var delimiter byte = 0
+	var delimiter byte
 	count := 0
 	for len(ansiCode) != 0 {
 		var num int

src/ansi_test.go

@@ -342,8 +342,8 @@ func TestAnsiCodeStringConversion(t *testing.T) {
 		state := interpretCode(code, prevState)
 		if expected != state.ToString() {
 			t.Errorf("expected: %s, actual: %s",
-				strings.Replace(expected, "\x1b[", "\\x1b[", -1),
-				strings.Replace(state.ToString(), "\x1b[", "\\x1b[", -1))
+				strings.ReplaceAll(expected, "\x1b[", "\\x1b["),
+				strings.ReplaceAll(state.ToString(), "\x1b[", "\\x1b["))
 		}
 	}
 	assert("\x1b[m", nil, "")

src/cache.go

@@ -12,8 +12,14 @@ type ChunkCache struct {
 }
 
 // NewChunkCache returns a new ChunkCache
-func NewChunkCache() ChunkCache {
-	return ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+func NewChunkCache() *ChunkCache {
+	return &ChunkCache{sync.Mutex{}, make(map[*Chunk]*queryCache)}
+}
+
+func (cc *ChunkCache) Clear() {
+	cc.mutex.Lock()
+	cc.cache = make(map[*Chunk]*queryCache)
+	cc.mutex.Unlock()
 }
 
 // Add adds the list to the cache

src/chunklist.go

@@ -48,7 +48,12 @@ func CountItems(cs []*Chunk) int {
 	if len(cs) == 0 {
 		return 0
 	}
-	return chunkSize*(len(cs)-1) + cs[len(cs)-1].count
+	if len(cs) == 1 {
+		return cs[0].count
+	}
+
+	// First chunk might not be full due to --tail=N
+	return cs[0].count + chunkSize*(len(cs)-2) + cs[len(cs)-1].count
 }
 
 // Push adds the item to the list
@@ -72,18 +77,53 @@ func (cl *ChunkList) Clear() {
 }
 
 // Snapshot returns immutable snapshot of the ChunkList
-func (cl *ChunkList) Snapshot() ([]*Chunk, int) {
+func (cl *ChunkList) Snapshot(tail int) ([]*Chunk, int, bool) {
 	cl.mutex.Lock()
 
+	changed := false
+	if tail > 0 && CountItems(cl.chunks) > tail {
+		changed = true
+		// Find the number of chunks to keep
+		numChunks := 0
+		for left, i := tail, len(cl.chunks)-1; left > 0 && i >= 0; i-- {
+			numChunks++
+			left -= cl.chunks[i].count
+		}
+
+		// Copy the chunks to keep
+		ret := make([]*Chunk, numChunks)
+		copy(ret, cl.chunks[len(cl.chunks)-numChunks:])
+
+		for left, i := tail, len(ret)-1; i >= 0; i-- {
+			chunk := ret[i]
+			if chunk.count > left {
+				newChunk := *chunk
+				newChunk.count = left
+				oldCount := chunk.count
+				for i := 0; i < left; i++ {
+					newChunk.items[i] = chunk.items[oldCount-left+i]
+				}
+				ret[i] = &newChunk
+				break
+			}
+			left -= chunk.count
+		}
+		cl.chunks = ret
+	}
+
 	ret := make([]*Chunk, len(cl.chunks))
 	copy(ret, cl.chunks)
 
-	// Duplicate the last chunk
+	// Duplicate the first and the last chunk
 	if cnt := len(ret); cnt > 0 {
+		if tail > 0 && cnt > 1 {
+			newChunk := *ret[0]
+			ret[0] = &newChunk
+		}
 		newChunk := *ret[cnt-1]
 		ret[cnt-1] = &newChunk
 	}
 
 	cl.mutex.Unlock()
-	return ret, CountItems(ret)
+	return ret, CountItems(ret), changed
 }

src/chunklist_test.go

@@ -17,7 +17,7 @@ func TestChunkList(t *testing.T) {
 	})
 
 	// Snapshot
-	snapshot, count := cl.Snapshot()
+	snapshot, count, _ := cl.Snapshot(0)
 	if len(snapshot) > 0 || count > 0 {
 		t.Error("Snapshot should be empty now")
 	}
@@ -32,7 +32,7 @@ func TestChunkList(t *testing.T) {
 	}
 
 	// But the new snapshot should contain the added items
-	snapshot, count = cl.Snapshot()
+	snapshot, count, _ = cl.Snapshot(0)
 	if len(snapshot) != 1 && count != 2 {
 		t.Error("Snapshot should not be empty now")
 	}
@@ -61,7 +61,7 @@ func TestChunkList(t *testing.T) {
 	}
 
 	// New snapshot
-	snapshot, count = cl.Snapshot()
+	snapshot, count, _ = cl.Snapshot(0)
 	if len(snapshot) != 3 || !snapshot[0].IsFull() ||
 		!snapshot[1].IsFull() || snapshot[2].IsFull() || count != chunkSize*2+2 {
 		t.Error("Expected two full chunks and one more chunk")
@@ -78,3 +78,39 @@ func TestChunkList(t *testing.T) {
 		t.Error("Unexpected number of items:", lastChunkCount)
 	}
 }
+
+func TestChunkListTail(t *testing.T) {
+	cl := NewChunkList(func(item *Item, s []byte) bool {
+		item.text = util.ToChars(s)
+		return true
+	})
+	total := chunkSize*2 + chunkSize/2
+	for i := 0; i < total; i++ {
+		cl.Push([]byte(fmt.Sprintf("item %d", i)))
+	}
+
+	snapshot, count, changed := cl.Snapshot(0)
+	assertCount := func(expected int, shouldChange bool) {
+		if count != expected || CountItems(snapshot) != expected {
+			t.Errorf("Unexpected count: %d (expected: %d)", count, expected)
+		}
+		if changed != shouldChange {
+			t.Error("Unexpected change status")
+		}
+	}
+	assertCount(total, false)
+
+	tail := chunkSize + chunkSize/2
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, true)
+
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, false)
+
+	snapshot, count, changed = cl.Snapshot(0)
+	assertCount(tail, false)
+
+	tail = chunkSize / 2
+	snapshot, count, changed = cl.Snapshot(tail)
+	assertCount(tail, true)
+}

src/constants.go

@@ -67,9 +67,9 @@ const (
 )
 
 const (
-	exitCancel    = -1
-	exitOk        = 0
-	exitNoMatch   = 1
-	exitError     = 2
-	exitInterrupt = 130
+	ExitOk        = 0
+	ExitNoMatch   = 1
+	ExitError     = 2
+	ExitBecome    = 126
+	ExitInterrupt = 130
 )

src/core.go

@@ -2,10 +2,9 @@
 package fzf
 
 import (
-	"fmt"
+	"os"
 	"sync"
 	"time"
-	"unsafe"
 
 	"github.com/junegunn/fzf/src/util"
 )
@@ -19,30 +18,54 @@ Matcher  -> EvtSearchFin      -> Terminal (update list)
 Matcher  -> EvtHeader         -> Terminal (update header)
 */
 
-func ustring(data []byte) string {
-	return unsafe.String(unsafe.SliceData(data), len(data))
+type revision struct {
+	major int
+	minor int
 }
 
-func sbytes(data string) []byte {
-	return unsafe.Slice(unsafe.StringData(data), len(data))
+func (r *revision) bumpMajor() {
+	r.major++
+	r.minor = 0
+}
+
+func (r *revision) bumpMinor() {
+	r.minor++
+}
+
+func (r revision) equals(other revision) bool {
+	return r.major == other.major && r.minor == other.minor
+}
+
+func (r revision) compatible(other revision) bool {
+	return r.major == other.major
 }
 
 // Run starts fzf
-func Run(opts *Options, version string, revision string) {
+func Run(opts *Options) (int, error) {
+	if opts.Tmux != nil && len(os.Getenv("TMUX")) > 0 && opts.Tmux.index >= opts.Height.index {
+		return runTmux(os.Args, opts)
+	}
+
+	if needWinpty(opts) {
+		return runWinpty(os.Args, opts)
+	}
+
+	if err := postProcessOptions(opts); err != nil {
+		return ExitError, err
+	}
+
 	defer util.RunAtExitFuncs()
 
+	// Output channel given
+	if opts.Output != nil {
+		opts.Printer = func(str string) {
+			opts.Output <- str
+		}
+	}
+
 	sort := opts.Sort > 0
 	sortCriteria = opts.Criteria
 
-	if opts.Version {
-		if len(revision) > 0 {
-			fmt.Printf("%s (%s)\n", version, revision)
-		} else {
-			fmt.Println(version)
-		}
-		util.Exit(exitOk)
-	}
-
 	// Event channel
 	eventBox := util.NewEventBox()
 
@@ -56,16 +79,16 @@ func Run(opts *Options, version string, revision string) {
 		if opts.Theme.Colored {
 			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
 				prevLineAnsiState = lineAnsiState
-				trimmed, offsets, newState := extractColor(ustring(data), lineAnsiState, nil)
+				trimmed, offsets, newState := extractColor(byteString(data), lineAnsiState, nil)
 				lineAnsiState = newState
-				return util.ToChars(sbytes(trimmed)), offsets
+				return util.ToChars(stringBytes(trimmed)), offsets
 			}
 		} else {
 			// When color is disabled but ansi option is given,
 			// we simply strip out ANSI codes from the input
 			ansiProcessor = func(data []byte) (util.Chars, *[]ansiOffset) {
-				trimmed, _, _ := extractColor(ustring(data), nil, nil)
-				return util.ToChars(sbytes(trimmed)), nil
+				trimmed, _, _ := extractColor(byteString(data), nil, nil)
+				return util.ToChars(stringBytes(trimmed)), nil
 			}
 		}
 	}
@@ -77,7 +100,7 @@ func Run(opts *Options, version string, revision string) {
 	if len(opts.WithNth) == 0 {
 		chunkList = NewChunkList(func(item *Item, data []byte) bool {
 			if len(header) < opts.HeaderLines {
-				header = append(header, ustring(data))
+				header = append(header, byteString(data))
 				eventBox.Set(EvtHeader, header)
 				return false
 			}
@@ -88,7 +111,7 @@ func Run(opts *Options, version string, revision string) {
 		})
 	} else {
 		chunkList = NewChunkList(func(item *Item, data []byte) bool {
-			tokens := Tokenize(ustring(data), opts.Delimiter)
+			tokens := Tokenize(byteString(data), opts.Delimiter)
 			if opts.Ansi && opts.Theme.Colored && len(tokens) > 1 {
 				var ansiState *ansiState
 				if prevLineAnsiState != nil {
@@ -112,7 +135,7 @@ func Run(opts *Options, version string, revision string) {
 				eventBox.Set(EvtHeader, header)
 				return false
 			}
-			item.text, item.colors = ansiProcessor(sbytes(transformed))
+			item.text, item.colors = ansiProcessor(stringBytes(transformed))
 			item.text.TrimTrailingWhitespaces()
 			item.text.Index = itemIndex
 			item.origText = &data
@@ -121,14 +144,17 @@ func Run(opts *Options, version string, revision string) {
 		})
 	}
 
+	// Process executor
+	executor := util.NewExecutor(opts.WithShell)
+
 	// Reader
 	streamingFilter := opts.Filter != nil && !sort && !opts.Tac && !opts.Sync
 	var reader *Reader
 	if !streamingFilter {
 		reader = NewReader(func(data []byte) bool {
 			return chunkList.Push(data)
-		}, eventBox, opts.ReadZero, opts.Filter == nil)
-		go reader.ReadSource(opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip)
+		}, eventBox, executor, opts.ReadZero, opts.Filter == nil)
+		go reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip)
 	}
 
 	// Matcher
@@ -144,14 +170,16 @@ func Run(opts *Options, version string, revision string) {
 			forward = true
 		}
 	}
+	cache := NewChunkCache()
+	patternCache := make(map[string]*Pattern)
 	patternBuilder := func(runes []rune) *Pattern {
-		return BuildPattern(
+		return BuildPattern(cache, patternCache,
 			opts.Fuzzy, opts.FuzzyAlgo, opts.Extended, opts.Case, opts.Normalize, forward, withPos,
 			opts.Filter == nil, opts.Nth, opts.Delimiter, runes)
 	}
-	inputRevision := 0
-	snapshotRevision := 0
-	matcher := NewMatcher(patternBuilder, sort, opts.Tac, eventBox, inputRevision)
+	inputRevision := revision{}
+	snapshotRevision := revision{}
+	matcher := NewMatcher(cache, patternBuilder, sort, opts.Tac, eventBox, inputRevision)
 
 	// Filtering mode
 	if opts.Filter != nil {
@@ -178,13 +206,14 @@ func Run(opts *Options, version string, revision string) {
 						mutex.Unlock()
 					}
 					return false
-				}, eventBox, opts.ReadZero, false)
-			reader.ReadSource(opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip)
+				}, eventBox, executor, opts.ReadZero, false)
+			reader.ReadSource(opts.Input, opts.WalkerRoot, opts.WalkerOpts, opts.WalkerSkip)
 		} else {
 			eventBox.Unwatch(EvtReadNew)
 			eventBox.WaitFor(EvtReadFin)
 
-			snapshot, _ := chunkList.Snapshot()
+			// NOTE: Streaming filter is inherently not compatible with --tail
+			snapshot, _, _ := chunkList.Snapshot(opts.Tail)
 			merger, _ := matcher.scan(MatchRequest{
 				chunks:  snapshot,
 				pattern: pattern})
@@ -194,9 +223,9 @@ func Run(opts *Options, version string, revision string) {
 			}
 		}
 		if found {
-			util.Exit(exitOk)
+			return ExitOk, nil
 		}
-		util.Exit(exitNoMatch)
+		return ExitNoMatch, nil
 	}
 
 	// Synchronous search
@@ -207,9 +236,13 @@ func Run(opts *Options, version string, revision string) {
 
 	// Go interactive
 	go matcher.Loop()
+	defer matcher.Stop()
 
 	// Terminal I/O
-	terminal := NewTerminal(opts, eventBox)
+	terminal, err := NewTerminal(opts, eventBox, executor)
+	if err != nil {
+		return ExitError, err
+	}
 	maxFit := 0 // Maximum number of items that can fit on screen
 	padHeight := 0
 	heightUnknown := opts.Height.auto
@@ -226,7 +259,7 @@ func Run(opts *Options, version string, revision string) {
 	// Event coordination
 	reading := true
 	ticks := 0
-	var nextCommand *string
+	var nextCommand *commandSpec
 	var nextEnviron []string
 	eventBox.Watch(EvtReadNew)
 	total := 0
@@ -247,14 +280,17 @@ func Run(opts *Options, version string, revision string) {
 	useSnapshot := false
 	var snapshot []*Chunk
 	var count int
-	restart := func(command string, environ []string) {
+	restart := func(command commandSpec, environ []string) {
 		reading = true
 		chunkList.Clear()
 		itemIndex = 0
-		inputRevision++
+		inputRevision.bumpMajor()
 		header = make([]string, 0, opts.HeaderLines)
 		go reader.restart(command, environ)
 	}
+
+	exitCode := ExitOk
+	stop := false
 	for {
 		delay := true
 		ticks++
@@ -275,7 +311,11 @@ func Run(opts *Options, version string, revision string) {
 					if reading {
 						reader.terminate()
 					}
-					util.Exit(value.(int))
+					quitSignal := value.(quitSignal)
+					exitCode = quitSignal.code
+					err = quitSignal.err
+					stop = true
+					return
 				case EvtReadNew, EvtReadFin:
 					if evt == EvtReadFin && nextCommand != nil {
 						restart(*nextCommand, nextEnviron)
@@ -289,17 +329,20 @@ func Run(opts *Options, version string, revision string) {
 						useSnapshot = false
 					}
 					if !useSnapshot {
-						if snapshotRevision != inputRevision {
+						if !snapshotRevision.compatible(inputRevision) {
 							query = []rune{}
 						}
-						snapshot, count = chunkList.Snapshot()
+						var changed bool
+						snapshot, count, changed = chunkList.Snapshot(opts.Tail)
+						if changed {
+							inputRevision.bumpMinor()
+						}
 						snapshotRevision = inputRevision
 					}
 					total = count
 					terminal.UpdateCount(total, !reading, value.(*string))
 					if opts.Sync {
-						opts.Sync = false
-						terminal.UpdateList(PassMerger(&snapshot, opts.Tac, snapshotRevision))
+						terminal.UpdateList(PassMerger(&snapshot, opts.Tac, snapshotRevision), false)
 					}
 					if heightUnknown && !deferred {
 						determine(!reading)
@@ -307,7 +350,7 @@ func Run(opts *Options, version string, revision string) {
 					matcher.Reset(snapshot, input(), false, !reading, sort, snapshotRevision)
 
 				case EvtSearchNew:
-					var command *string
+					var command *commandSpec
 					var environ []string
 					var changed bool
 					switch val := value.(type) {
@@ -333,7 +376,10 @@ func Run(opts *Options, version string, revision string) {
 						break
 					}
 					if !useSnapshot {
-						newSnapshot, newCount := chunkList.Snapshot()
+						newSnapshot, newCount, changed := chunkList.Snapshot(opts.Tail)
+						if changed {
+							inputRevision.bumpMinor()
+						}
 						// We want to avoid showing empty list when reload is triggered
 						// and the query string is changed at the same time i.e. command != nil && changed
 						if command == nil || newCount > 0 {
@@ -376,20 +422,24 @@ func Run(opts *Options, version string, revision string) {
 									for i := 0; i < count; i++ {
 										opts.Printer(val.Get(i).item.AsString(opts.Ansi))
 									}
-									if count > 0 {
-										util.Exit(exitOk)
+									if count == 0 {
+										exitCode = ExitNoMatch
 									}
-									util.Exit(exitNoMatch)
+									stop = true
+									return
 								}
 								determine(val.final)
 							}
 						}
-						terminal.UpdateList(val)
+						terminal.UpdateList(val, true)
 					}
 				}
 			}
 			events.Clear()
 		})
+		if stop {
+			break
+		}
 		if delay && reading {
 			dur := util.DurWithin(
 				time.Duration(ticks)*coordinatorDelayStep,
@@ -397,4 +447,5 @@ func Run(opts *Options, version string, revision string) {
 			time.Sleep(dur)
 		}
 	}
+	return exitCode, err
 }

src/functions.go

@@ -0,0 +1,35 @@
+package fzf
+
+import (
+	"os"
+	"strings"
+	"unsafe"
+)
+
+func WriteTemporaryFile(data []string, printSep string) string {
+	f, err := os.CreateTemp("", "fzf-temp-*")
+	if err != nil {
+		// Unable to create temporary file
+		// FIXME: Should we terminate the program?
+		return ""
+	}
+	defer f.Close()
+
+	f.WriteString(strings.Join(data, printSep))
+	f.WriteString(printSep)
+	return f.Name()
+}
+
+func removeFiles(files []string) {
+	for _, filename := range files {
+		os.Remove(filename)
+	}
+}
+
+func stringBytes(data string) []byte {
+	return unsafe.Slice(unsafe.StringData(data), len(data))
+}
+
+func byteString(data []byte) string {
+	return unsafe.String(unsafe.SliceData(data), len(data))
+}

src/item.go

@@ -1,6 +1,8 @@
 package fzf
 
 import (
+	"math"
+
 	"github.com/junegunn/fzf/src/util"
 )
 
@@ -17,7 +19,7 @@ func (item *Item) Index() int32 {
 	return item.text.Index
 }
 
-var minItem = Item{text: util.Chars{Index: -1}}
+var minItem = Item{text: util.Chars{Index: math.MinInt32}}
 
 func (item *Item) TrimLength() uint16 {
 	return item.text.TrimLength()

src/matcher.go

@@ -16,11 +16,12 @@ type MatchRequest struct {
 	pattern  *Pattern
 	final    bool
 	sort     bool
-	revision int
+	revision revision
 }
 
 // Matcher is responsible for performing search
 type Matcher struct {
+	cache          *ChunkCache
 	patternBuilder func([]rune) *Pattern
 	sort           bool
 	tac            bool
@@ -29,7 +30,7 @@ type Matcher struct {
 	partitions     int
 	slab           []*util.Slab
 	mergerCache    map[string]*Merger
-	revision       int
+	revision       revision
 }
 
 const (
@@ -38,10 +39,11 @@ const (
 )
 
 // NewMatcher returns a new Matcher
-func NewMatcher(patternBuilder func([]rune) *Pattern,
-	sort bool, tac bool, eventBox *util.EventBox, revision int) *Matcher {
+func NewMatcher(cache *ChunkCache, patternBuilder func([]rune) *Pattern,
+	sort bool, tac bool, eventBox *util.EventBox, revision revision) *Matcher {
 	partitions := util.Min(numPartitionsMultiplier*runtime.NumCPU(), maxPartitions)
 	return &Matcher{
+		cache:          cache,
 		patternBuilder: patternBuilder,
 		sort:           sort,
 		tac:            tac,
@@ -60,8 +62,13 @@ func (m *Matcher) Loop() {
 	for {
 		var request MatchRequest
 
+		stop := false
 		m.reqBox.Wait(func(events *util.Events) {
-			for _, val := range *events {
+			for t, val := range *events {
+				if t == reqQuit {
+					stop = true
+					return
+				}
 				switch val := val.(type) {
 				case MatchRequest:
 					request = val
@@ -71,12 +78,17 @@ func (m *Matcher) Loop() {
 			}
 			events.Clear()
 		})
+		if stop {
+			break
+		}
 
+		cacheCleared := false
 		if request.sort != m.sort || request.revision != m.revision {
 			m.sort = request.sort
 			m.revision = request.revision
 			m.mergerCache = make(map[string]*Merger)
-			clearChunkCache()
+			m.cache.Clear()
+			cacheCleared = true
 		}
 
 		// Restart search
@@ -85,20 +97,20 @@ func (m *Matcher) Loop() {
 		cancelled := false
 		count := CountItems(request.chunks)
 
-		foundCache := false
-		if count == prevCount {
-			// Look up mergerCache
-			if cached, found := m.mergerCache[patternString]; found {
-				foundCache = true
-				merger = cached
+		if !cacheCleared {
+			if count == prevCount {
+				// Look up mergerCache
+				if cached, found := m.mergerCache[patternString]; found {
+					merger = cached
+				}
+			} else {
+				// Invalidate mergerCache
+				prevCount = count
+				m.mergerCache = make(map[string]*Merger)
 			}
-		} else {
-			// Invalidate mergerCache
-			prevCount = count
-			m.mergerCache = make(map[string]*Merger)
 		}
 
-		if !foundCache {
+		if merger == nil {
 			merger, cancelled = m.scan(request)
 		}
 
@@ -150,6 +162,7 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 		return PassMerger(&request.chunks, m.tac, request.revision), false
 	}
 
+	minIndex := request.chunks[0].items[0].Index()
 	cancelled := util.NewAtomicBool(false)
 
 	slices := m.sliceChunks(request.chunks)
@@ -221,11 +234,11 @@ func (m *Matcher) scan(request MatchRequest) (*Merger, bool) {
 		partialResult := <-resultChan
 		partialResults[partialResult.index] = partialResult.matches
 	}
-	return NewMerger(pattern, partialResults, m.sort, m.tac, request.revision), false
+	return NewMerger(pattern, partialResults, m.sort, m.tac, request.revision, minIndex), false
 }
 
 // Reset is called to interrupt/signal the ongoing search
-func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool, revision int) {
+func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final bool, sort bool, revision revision) {
 	pattern := m.patternBuilder(patternRunes)
 
 	var event util.EventType
@@ -236,3 +249,7 @@ func (m *Matcher) Reset(chunks []*Chunk, patternRunes []rune, cancel bool, final
 	}
 	m.reqBox.Set(event, MatchRequest{chunks, pattern, final, sort && pattern.sortable, revision})
 }
+
+func (m *Matcher) Stop() {
+	m.reqBox.Set(reqQuit, nil)
+}

src/merger.go

@@ -3,8 +3,8 @@ package fzf
 import "fmt"
 
 // EmptyMerger is a Merger with no data
-func EmptyMerger(revision int) *Merger {
-	return NewMerger(nil, [][]Result{}, false, false, revision)
+func EmptyMerger(revision revision) *Merger {
+	return NewMerger(nil, [][]Result{}, false, false, revision, 0)
 }
 
 // Merger holds a set of locally sorted lists of items and provides the view of
@@ -20,19 +20,25 @@ type Merger struct {
 	final    bool
 	count    int
 	pass     bool
-	revision int
+	revision revision
+	minIndex int32
 }
 
 // PassMerger returns a new Merger that simply returns the items in the
 // original order
-func PassMerger(chunks *[]*Chunk, tac bool, revision int) *Merger {
+func PassMerger(chunks *[]*Chunk, tac bool, revision revision) *Merger {
+	var minIndex int32
+	if len(*chunks) > 0 {
+		minIndex = (*chunks)[0].items[0].Index()
+	}
 	mg := Merger{
 		pattern:  nil,
 		chunks:   chunks,
 		tac:      tac,
 		count:    0,
 		pass:     true,
-		revision: revision}
+		revision: revision,
+		minIndex: minIndex}
 
 	for _, chunk := range *mg.chunks {
 		mg.count += chunk.count
@@ -41,7 +47,7 @@ func PassMerger(chunks *[]*Chunk, tac bool, revision int) *Merger {
 }
 
 // NewMerger returns a new Merger
-func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revision int) *Merger {
+func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revision revision, minIndex int32) *Merger {
 	mg := Merger{
 		pattern:  pattern,
 		lists:    lists,
@@ -52,7 +58,8 @@ func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revisi
 		tac:      tac,
 		final:    false,
 		count:    0,
-		revision: revision}
+		revision: revision,
+		minIndex: minIndex}
 
 	for _, list := range mg.lists {
 		mg.count += len(list)
@@ -61,7 +68,7 @@ func NewMerger(pattern *Pattern, lists [][]Result, sorted bool, tac bool, revisi
 }
 
 // Revision returns revision number
-func (mg *Merger) Revision() int {
+func (mg *Merger) Revision() revision {
 	return mg.revision
 }
 
@@ -81,7 +88,7 @@ func (mg *Merger) First() Result {
 func (mg *Merger) FindIndex(itemIndex int32) int {
 	index := -1
 	if mg.pass {
-		index = int(itemIndex)
+		index = int(itemIndex - mg.minIndex)
 		if mg.tac {
 			index = mg.count - index - 1
 		}
@@ -102,6 +109,13 @@ func (mg *Merger) Get(idx int) Result {
 		if mg.tac {
 			idx = mg.count - idx - 1
 		}
+		firstChunk := (*mg.chunks)[0]
+		if firstChunk.count < chunkSize && idx >= firstChunk.count {
+			idx -= firstChunk.count
+
+			chunk := (*mg.chunks)[idx/chunkSize+1]
+			return Result{item: &chunk.items[idx%chunkSize]}
+		}
 		chunk := (*mg.chunks)[idx/chunkSize]
 		return Result{item: &chunk.items[idx%chunkSize]}
 	}

src/merger_test.go

@@ -23,10 +23,11 @@ func randResult() Result {
 }
 
 func TestEmptyMerger(t *testing.T) {
-	assert(t, EmptyMerger(0).Length() == 0, "Not empty")
-	assert(t, EmptyMerger(0).count == 0, "Invalid count")
-	assert(t, len(EmptyMerger(0).lists) == 0, "Invalid lists")
-	assert(t, len(EmptyMerger(0).merged) == 0, "Invalid merged list")
+	r := revision{}
+	assert(t, EmptyMerger(r).Length() == 0, "Not empty")
+	assert(t, EmptyMerger(r).count == 0, "Invalid count")
+	assert(t, len(EmptyMerger(r).lists) == 0, "Invalid lists")
+	assert(t, len(EmptyMerger(r).merged) == 0, "Invalid merged list")
 }
 
 func buildLists(partiallySorted bool) ([][]Result, []Result) {
@@ -57,7 +58,7 @@ func TestMergerUnsorted(t *testing.T) {
 	cnt := len(items)
 
 	// Not sorted: same order
-	mg := NewMerger(nil, lists, false, false, 0)
+	mg := NewMerger(nil, lists, false, false, revision{}, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	for i := 0; i < cnt; i++ {
 		assert(t, items[i] == mg.Get(i), "Invalid Get")
@@ -69,7 +70,7 @@ func TestMergerSorted(t *testing.T) {
 	cnt := len(items)
 
 	// Sorted sorted order
-	mg := NewMerger(nil, lists, true, false, 0)
+	mg := NewMerger(nil, lists, true, false, revision{}, 0)
 	assert(t, cnt == mg.Length(), "Invalid Length")
 	sort.Sort(ByRelevance(items))
 	for i := 0; i < cnt; i++ {
@@ -79,7 +80,7 @@ func TestMergerSorted(t *testing.T) {
 	}
 
 	// Inverse order
-	mg2 := NewMerger(nil, lists, true, false, 0)
+	mg2 := NewMerger(nil, lists, true, false, revision{}, 0)
 	for i := cnt - 1; i >= 0; i-- {
 		if items[i] != mg2.Get(i) {
 			t.Error("Not sorted", items[i], mg2.Get(i))

src/options_no_pprof.go

@@ -3,9 +3,11 @@
 
 package fzf
 
+import "errors"
+
 func (o *Options) initProfiling() error {
 	if o.CPUProfile != "" || o.MEMProfile != "" || o.BlockProfile != "" || o.MutexProfile != "" {
-		errorExit("error: profiling not supported: FZF must be built with '-tags=pprof' to enable profiling")
+		return errors.New("error: profiling not supported: FZF must be built with '-tags=pprof' to enable profiling")
 	}
 	return nil
 }

src/options_test.go

@@ -80,7 +80,7 @@ func TestDelimiterRegexRegexCaret(t *testing.T) {
 
 func TestSplitNth(t *testing.T) {
 	{
-		ranges := splitNth("..")
+		ranges, _ := splitNth("..")
 		if len(ranges) != 1 ||
 			ranges[0].begin != rangeEllipsis ||
 			ranges[0].end != rangeEllipsis {
@@ -88,7 +88,7 @@ func TestSplitNth(t *testing.T) {
 		}
 	}
 	{
-		ranges := splitNth("..3,1..,2..3,4..-1,-3..-2,..,2,-2,2..-2,1..-1")
+		ranges, _ := splitNth("..3,1..,2..3,4..-1,-3..-2,..,2,-2,2..-2,1..-1")
 		if len(ranges) != 10 ||
 			ranges[0].begin != rangeEllipsis || ranges[0].end != 3 ||
 			ranges[1].begin != rangeEllipsis || ranges[1].end != rangeEllipsis ||
@@ -106,10 +106,11 @@ func TestSplitNth(t *testing.T) {
 }
 
 func TestIrrelevantNth(t *testing.T) {
+	index := 0
 	{
 		opts := defaultOptions()
 		words := []string{"--nth", "..", "-x"}
-		parseOptions(opts, words)
+		parseOptions(&index, opts, words)
 		postProcessOptions(opts)
 		if len(opts.Nth) != 0 {
 			t.Errorf("nth should be empty: %v", opts.Nth)
@@ -118,7 +119,7 @@ func TestIrrelevantNth(t *testing.T) {
 	for _, words := range [][]string{{"--nth", "..,3", "+x"}, {"--nth", "3,1..", "+x"}, {"--nth", "..-1,1", "+x"}} {
 		{
 			opts := defaultOptions()
-			parseOptions(opts, words)
+			parseOptions(&index, opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 0 {
 				t.Errorf("nth should be empty: %v", opts.Nth)
@@ -127,7 +128,7 @@ func TestIrrelevantNth(t *testing.T) {
 		{
 			opts := defaultOptions()
 			words = append(words, "-x")
-			parseOptions(opts, words)
+			parseOptions(&index, opts, words)
 			postProcessOptions(opts)
 			if len(opts.Nth) != 2 {
 				t.Errorf("nth should not be empty: %v", opts.Nth)
@@ -137,7 +138,7 @@ func TestIrrelevantNth(t *testing.T) {
 }
 
 func TestParseKeys(t *testing.T) {
-	pairs := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ctrl-alt-a,ALT-enter,alt-SPACE", "")
+	pairs, _ := parseKeyChords("ctrl-z,alt-z,f2,@,Alt-a,!,ctrl-G,J,g,ctrl-alt-a,ALT-enter,alt-SPACE", "")
 	checkEvent := func(e tui.Event, s string) {
 		if pairs[e] != s {
 			t.Errorf("%s != %s", pairs[e], s)
@@ -163,7 +164,7 @@ func TestParseKeys(t *testing.T) {
 	checkEvent(tui.AltKey(' '), "alt-SPACE")
 
 	// Synonyms
-	pairs = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
+	pairs, _ = parseKeyChords("enter,Return,space,tab,btab,esc,up,down,left,right", "")
 	if len(pairs) != 9 {
 		t.Error(9)
 	}
@@ -177,7 +178,7 @@ func TestParseKeys(t *testing.T) {
 	check(tui.Left, "left")
 	check(tui.Right, "right")
 
-	pairs = parseKeyChords("Tab,Ctrl-I,PgUp,page-up,pgdn,Page-Down,Home,End,Alt-BS,Alt-BSpace,shift-left,shift-right,btab,shift-tab,return,Enter,bspace", "")
+	pairs, _ = parseKeyChords("Tab,Ctrl-I,PgUp,page-up,pgdn,Page-Down,Home,End,Alt-BS,Alt-BSpace,shift-left,shift-right,btab,shift-tab,return,Enter,bspace", "")
 	if len(pairs) != 11 {
 		t.Error(11)
 	}
@@ -206,40 +207,40 @@ func TestParseKeysWithComma(t *testing.T) {
 		}
 	}
 
-	pairs := parseKeyChords(",", "")
+	pairs, _ := parseKeyChords(",", "")
 	checkN(len(pairs), 1)
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",,a,b", "")
+	pairs, _ = parseKeyChords(",,a,b", "")
 	checkN(len(pairs), 3)
 	check(pairs, tui.Key('a'), "a")
 	check(pairs, tui.Key('b'), "b")
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,b,,", "")
+	pairs, _ = parseKeyChords("a,b,,", "")
 	checkN(len(pairs), 3)
 	check(pairs, tui.Key('a'), "a")
 	check(pairs, tui.Key('b'), "b")
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,,,b", "")
+	pairs, _ = parseKeyChords("a,,,b", "")
 	checkN(len(pairs), 3)
 	check(pairs, tui.Key('a'), "a")
 	check(pairs, tui.Key('b'), "b")
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords("a,,,b,c", "")
+	pairs, _ = parseKeyChords("a,,,b,c", "")
 	checkN(len(pairs), 4)
 	check(pairs, tui.Key('a'), "a")
 	check(pairs, tui.Key('b'), "b")
 	check(pairs, tui.Key('c'), "c")
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",,,", "")
+	pairs, _ = parseKeyChords(",,,", "")
 	checkN(len(pairs), 1)
 	check(pairs, tui.Key(','), ",")
 
-	pairs = parseKeyChords(",ALT-,,", "")
+	pairs, _ = parseKeyChords(",ALT-,,", "")
 	checkN(len(pairs), 1)
 	check(pairs, tui.AltKey(','), "ALT-,")
 }
@@ -262,17 +263,13 @@ func TestBind(t *testing.T) {
 		}
 	}
 	check(tui.CtrlA.AsEvent(), "", actBeginningOfLine)
-	errorString := ""
-	errorFn := func(e string) {
-		errorString = e
-	}
 	parseKeymap(keymap,
 		"ctrl-a:kill-line,ctrl-b:toggle-sort+up+down,c:page-up,alt-z:page-down,"+
 			"f1:execute(ls {+})+abort+execute(echo \n{+})+select-all,f2:execute/echo {}, {}, {}/,f3:execute[echo '({})'],f4:execute;less {};,"+
 			"alt-a:execute-Multi@echo (,),[,],/,:,;,%,{}@,alt-b:execute;echo (,),[,],/,:,@,%,{};,"+
 			"x:Execute(foo+bar),X:execute/bar+baz/"+
 			",f1:+first,f1:+top"+
-			",,:abort,::accept,+:execute:++\nfoobar,Y:execute(baz)+up", errorFn)
+			",,:abort,::accept,+:execute:++\nfoobar,Y:execute(baz)+up")
 	check(tui.CtrlA.AsEvent(), "", actKillLine)
 	check(tui.CtrlB.AsEvent(), "", actToggleSort, actUp, actDown)
 	check(tui.Key('c'), "", actPageUp)
@@ -290,20 +287,17 @@ func TestBind(t *testing.T) {
 	check(tui.Key('+'), "++\nfoobar,Y:execute(baz)+up", actExecute)
 
 	for idx, char := range []rune{'~', '!', '@', '#', '$', '%', '^', '&', '*', '|', ';', '/'} {
-		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char), errorFn)
+		parseKeymap(keymap, fmt.Sprintf("%d:execute%cfoobar%c", idx%10, char, char))
 		check(tui.Key([]rune(fmt.Sprintf("%d", idx%10))[0]), "foobar", actExecute)
 	}
 
-	parseKeymap(keymap, "f1:abort", errorFn)
+	parseKeymap(keymap, "f1:abort")
 	check(tui.F1.AsEvent(), "", actAbort)
-	if len(errorString) > 0 {
-		t.Errorf("error parsing keymap: %s", errorString)
-	}
 }
 
 func TestColorSpec(t *testing.T) {
 	theme := tui.Dark256
-	dark := parseTheme(theme, "dark")
+	dark, _ := parseTheme(theme, "dark")
 	if *dark != *theme {
 		t.Errorf("colors should be equivalent")
 	}
@@ -311,7 +305,7 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("point should not be equivalent")
 	}
 
-	light := parseTheme(theme, "dark,light")
+	light, _ := parseTheme(theme, "dark,light")
 	if *light == *theme {
 		t.Errorf("should not be equivalent")
 	}
@@ -322,7 +316,7 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("point should not be equivalent")
 	}
 
-	customized := parseTheme(theme, "fg:231,bg:232")
+	customized, _ := parseTheme(theme, "fg:231,bg:232")
 	if customized.Fg.Color != 231 || customized.Bg.Color != 232 {
 		t.Errorf("color not customized")
 	}
@@ -335,17 +329,18 @@ func TestColorSpec(t *testing.T) {
 		t.Errorf("colors should now be equivalent: %v, %v", tui.Dark256, customized)
 	}
 
-	customized = parseTheme(theme, "fg:231,dark,bg:232")
+	customized, _ = parseTheme(theme, "fg:231,dark,bg:232")
 	if customized.Fg != tui.Dark256.Fg || customized.Bg == tui.Dark256.Bg {
 		t.Errorf("color not customized")
 	}
 }
 
 func TestDefaultCtrlNP(t *testing.T) {
+	index := 0
 	check := func(words []string, et tui.EventType, expected actionType) {
 		e := et.AsEvent()
 		opts := defaultOptions()
-		parseOptions(opts, words)
+		parseOptions(&index, opts, words)
 		postProcessOptions(opts)
 		if opts.Keymap[e][0].t != expected {
 			t.Error()
@@ -371,8 +366,9 @@ func TestDefaultCtrlNP(t *testing.T) {
 }
 
 func optsFor(words ...string) *Options {
+	index := 0
 	opts := defaultOptions()
-	parseOptions(opts, words)
+	parseOptions(&index, opts, words)
 	postProcessOptions(opts)
 	return opts
 }
@@ -475,7 +471,7 @@ func TestValidateSign(t *testing.T) {
 }
 
 func TestParseSingleActionList(t *testing.T) {
-	actions := parseSingleActionList("Execute@foo+bar,baz@+up+up+reload:down+down", func(string) {})
+	actions, _ := parseSingleActionList("Execute@foo+bar,baz@+up+up+reload:down+down")
 	if len(actions) != 4 {
 		t.Errorf("Invalid number of actions parsed:%d", len(actions))
 	}
@@ -491,11 +487,8 @@ func TestParseSingleActionList(t *testing.T) {
 }
 
 func TestParseSingleActionListError(t *testing.T) {
-	err := ""
-	parseSingleActionList("change-query(foobar)baz", func(e string) {
-		err = e
-	})
-	if len(err) == 0 {
+	_, err := parseSingleActionList("change-query(foobar)baz")
+	if err == nil {
 		t.Errorf("Failed to detect error")
 	}
 }

src/pattern.go

@@ -60,32 +60,17 @@ type Pattern struct {
 	delimiter     Delimiter
 	nth           []Range
 	procFun       map[termType]algo.Algo
+	cache         *ChunkCache
 }
 
-var (
-	_patternCache map[string]*Pattern
-	_splitRegex   *regexp.Regexp
-	_cache        ChunkCache
-)
+var _splitRegex *regexp.Regexp
 
 func init() {
 	_splitRegex = regexp.MustCompile(" +")
-	clearPatternCache()
-	clearChunkCache()
-}
-
-func clearPatternCache() {
-	// We can uniquely identify the pattern for a given string since
-	// search mode and caseMode do not change while the program is running
-	_patternCache = make(map[string]*Pattern)
-}
-
-func clearChunkCache() {
-	_cache = NewChunkCache()
 }
 
 // BuildPattern builds Pattern object from the given arguments
-func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+func BuildPattern(cache *ChunkCache, patternCache map[string]*Pattern, fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
 	withPos bool, cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
 
 	var asString string
@@ -98,7 +83,9 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 		asString = string(runes)
 	}
 
-	cached, found := _patternCache[asString]
+	// We can uniquely identify the pattern for a given string since
+	// search mode and caseMode do not change while the program is running
+	cached, found := patternCache[asString]
 	if found {
 		return cached
 	}
@@ -153,6 +140,7 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 		cacheable:     cacheable,
 		nth:           nth,
 		delimiter:     delimiter,
+		cache:         cache,
 		procFun:       make(map[termType]algo.Algo)}
 
 	ptr.cacheKey = ptr.buildCacheKey()
@@ -162,19 +150,19 @@ func BuildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case,
 	ptr.procFun[termPrefix] = algo.PrefixMatch
 	ptr.procFun[termSuffix] = algo.SuffixMatch
 
-	_patternCache[asString] = ptr
+	patternCache[asString] = ptr
 	return ptr
 }
 
 func parseTerms(fuzzy bool, caseMode Case, normalize bool, str string) []termSet {
-	str = strings.Replace(str, "\\ ", "\t", -1)
+	str = strings.ReplaceAll(str, "\\ ", "\t")
 	tokens := _splitRegex.Split(str, -1)
 	sets := []termSet{}
 	set := termSet{}
 	switchSet := false
 	afterBar := false
 	for _, token := range tokens {
-		typ, inv, text := termFuzzy, false, strings.Replace(token, "\t", " ", -1)
+		typ, inv, text := termFuzzy, false, strings.ReplaceAll(token, "\t", " ")
 		lowerText := strings.ToLower(text)
 		caseSensitive := caseMode == CaseRespect ||
 			caseMode == CaseSmart && text != lowerText
@@ -282,18 +270,18 @@ func (p *Pattern) Match(chunk *Chunk, slab *util.Slab) []Result {
 	// ChunkCache: Exact match
 	cacheKey := p.CacheKey()
 	if p.cacheable {
-		if cached := _cache.Lookup(chunk, cacheKey); cached != nil {
+		if cached := p.cache.Lookup(chunk, cacheKey); cached != nil {
 			return cached
 		}
 	}
 
 	// Prefix/suffix cache
-	space := _cache.Search(chunk, cacheKey)
+	space := p.cache.Search(chunk, cacheKey)
 
 	matches := p.matchChunk(chunk, space, slab)
 
 	if p.cacheable {
-		_cache.Add(chunk, cacheKey, matches)
+		p.cache.Add(chunk, cacheKey, matches)
 	}
 	return matches
 }

src/pattern_test.go

@@ -64,10 +64,15 @@ func TestParseTermsEmpty(t *testing.T) {
 	}
 }
 
+func buildPattern(fuzzy bool, fuzzyAlgo algo.Algo, extended bool, caseMode Case, normalize bool, forward bool,
+	withPos bool, cacheable bool, nth []Range, delimiter Delimiter, runes []rune) *Pattern {
+	return BuildPattern(NewChunkCache(), make(map[string]*Pattern),
+		fuzzy, fuzzyAlgo, extended, caseMode, normalize, forward,
+		withPos, cacheable, nth, delimiter, runes)
+}
+
 func TestExact(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true,
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true,
 		[]Range{}, Delimiter{}, []rune("'abc"))
 	chars := util.ToChars([]byte("aabbcc abc"))
 	res, pos := algo.ExactMatchNaive(
@@ -81,9 +86,7 @@ func TestExact(t *testing.T) {
 }
 
 func TestEqual(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("^AbC$"))
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("^AbC$"))
 
 	match := func(str string, sidxExpected int, eidxExpected int) {
 		chars := util.ToChars([]byte(str))
@@ -104,19 +107,12 @@ func TestEqual(t *testing.T) {
 }
 
 func TestCaseSensitivity(t *testing.T) {
-	defer clearPatternCache()
-	clearPatternCache()
-	pat1 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat2 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat3 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat4 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
-	clearPatternCache()
-	pat5 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
-	clearPatternCache()
-	pat6 := BuildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat1 := buildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat2 := buildPattern(true, algo.FuzzyMatchV2, false, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat3 := buildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat4 := buildPattern(true, algo.FuzzyMatchV2, false, CaseIgnore, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
+	pat5 := buildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("abc"))
+	pat6 := buildPattern(true, algo.FuzzyMatchV2, false, CaseRespect, false, true, false, true, []Range{}, Delimiter{}, []rune("Abc"))
 
 	if string(pat1.text) != "abc" || pat1.caseSensitive != false ||
 		string(pat2.text) != "Abc" || pat2.caseSensitive != true ||
@@ -129,7 +125,7 @@ func TestCaseSensitivity(t *testing.T) {
 }
 
 func TestOrigTextAndTransformed(t *testing.T) {
-	pattern := BuildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("jg"))
+	pattern := buildPattern(true, algo.FuzzyMatchV2, true, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune("jg"))
 	tokens := Tokenize("junegunn", Delimiter{})
 	trans := Transform(tokens, []Range{{1, 1}})
 
@@ -163,15 +159,13 @@ func TestOrigTextAndTransformed(t *testing.T) {
 
 func TestCacheKey(t *testing.T) {
 	test := func(extended bool, patStr string, expected string, cacheable bool) {
-		clearPatternCache()
-		pat := BuildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune(patStr))
+		pat := buildPattern(true, algo.FuzzyMatchV2, extended, CaseSmart, false, true, false, true, []Range{}, Delimiter{}, []rune(patStr))
 		if pat.CacheKey() != expected {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}
 		if pat.cacheable != cacheable {
 			t.Errorf("Expected: %t, actual: %t (%s)", cacheable, pat.cacheable, patStr)
 		}
-		clearPatternCache()
 	}
 	test(false, "foo !bar", "foo !bar", true)
 	test(false, "foo | bar !baz", "foo | bar !baz", true)
@@ -187,15 +181,13 @@ func TestCacheKey(t *testing.T) {
 
 func TestCacheable(t *testing.T) {
 	test := func(fuzzy bool, str string, expected string, cacheable bool) {
-		clearPatternCache()
-		pat := BuildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, false, true, []Range{}, Delimiter{}, []rune(str))
+		pat := buildPattern(fuzzy, algo.FuzzyMatchV2, true, CaseSmart, true, true, false, true, []Range{}, Delimiter{}, []rune(str))
 		if pat.CacheKey() != expected {
 			t.Errorf("Expected: %s, actual: %s", expected, pat.CacheKey())
 		}
 		if cacheable != pat.cacheable {
 			t.Errorf("Invalid Pattern.cacheable for \"%s\": %v (expected: %v)", str, pat.cacheable, cacheable)
 		}
-		clearPatternCache()
 	}
 	test(true, "foo bar", "foo\tbar", true)
 	test(true, "foo 'bar", "foo\tbar", false)

src/protector/protector.go

@@ -3,6 +3,4 @@
 package protector
 
 // Protect calls OS specific protections like pledge on OpenBSD
-func Protect() {
-	return
-}
+func Protect() {}

src/proxy.go

@@ -0,0 +1,146 @@
+package fzf
+
+import (
+	"bufio"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"os/signal"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"github.com/junegunn/fzf/src/tui"
+	"github.com/junegunn/fzf/src/util"
+)
+
+const becomeSuffix = ".become"
+
+func escapeSingleQuote(str string) string {
+	return "'" + strings.ReplaceAll(str, "'", "'\\''") + "'"
+}
+
+func fifo(name string) (string, error) {
+	ns := time.Now().UnixNano()
+	output := filepath.Join(os.TempDir(), fmt.Sprintf("fzf-%s-%d", name, ns))
+	output, err := mkfifo(output, 0600)
+	if err != nil {
+		return output, err
+	}
+	return output, nil
+}
+
+func runProxy(commandPrefix string, cmdBuilder func(temp string) *exec.Cmd, opts *Options, withExports bool) (int, error) {
+	output, err := fifo("proxy-output")
+	if err != nil {
+		return ExitError, err
+	}
+	defer os.Remove(output)
+
+	// Take the output
+	go func() {
+		withOutputPipe(output, func(outputFile io.ReadCloser) {
+			if opts.Output == nil {
+				io.Copy(os.Stdout, outputFile)
+			} else {
+				reader := bufio.NewReader(outputFile)
+				sep := opts.PrintSep[0]
+				for {
+					item, err := reader.ReadString(sep)
+					if err != nil {
+						break
+					}
+					opts.Output <- item
+				}
+			}
+		})
+	}()
+
+	var command string
+	commandPrefix += ` --no-force-tty-in --proxy-script "$0"`
+	if opts.Input == nil && (opts.ForceTtyIn || util.IsTty(os.Stdin)) {
+		command = fmt.Sprintf(`%s > %q`, commandPrefix, output)
+	} else {
+		input, err := fifo("proxy-input")
+		if err != nil {
+			return ExitError, err
+		}
+		defer os.Remove(input)
+
+		go func() {
+			withInputPipe(input, func(inputFile io.WriteCloser) {
+				if opts.Input == nil {
+					io.Copy(inputFile, os.Stdin)
+				} else {
+					for item := range opts.Input {
+						fmt.Fprint(inputFile, item+opts.PrintSep)
+					}
+				}
+			})
+		}()
+
+		if withExports {
+			command = fmt.Sprintf(`%s < %q > %q`, commandPrefix, input, output)
+		} else {
+			// For mintty: cannot directly read named pipe from Go code
+			command = fmt.Sprintf(`command cat %q | %s > %q`, input, commandPrefix, output)
+		}
+	}
+
+	// To ensure that the options are processed by a POSIX-compliant shell,
+	// we need to write the command to a temporary file and execute it with sh.
+	var exports []string
+	if withExports {
+		exports = os.Environ()
+		for idx, pairStr := range exports {
+			pair := strings.SplitN(pairStr, "=", 2)
+			exports[idx] = fmt.Sprintf("export %s=%s", pair[0], escapeSingleQuote(pair[1]))
+		}
+	}
+	temp := WriteTemporaryFile(append(exports, command), "\n")
+	defer os.Remove(temp)
+
+	cmd := cmdBuilder(temp)
+	cmd.Stderr = os.Stderr
+	intChan := make(chan os.Signal, 1)
+	defer close(intChan)
+	go func() {
+		if sig, valid := <-intChan; valid {
+			cmd.Process.Signal(sig)
+		}
+	}()
+	signal.Notify(intChan, os.Interrupt)
+	if err := cmd.Run(); err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			code := exitError.ExitCode()
+			if code == ExitBecome {
+				becomeFile := temp + becomeSuffix
+				data, err := os.ReadFile(becomeFile)
+				os.Remove(becomeFile)
+				if err != nil {
+					return ExitError, err
+				}
+				elems := strings.Split(string(data), "\x00")
+				if len(elems) < 1 {
+					return ExitError, errors.New("invalid become command")
+				}
+				command := elems[0]
+				env := []string{}
+				if len(elems) > 1 {
+					env = elems[1:]
+				}
+				executor := util.NewExecutor(opts.WithShell)
+				ttyin, err := tui.TtyIn()
+				if err != nil {
+					return ExitError, err
+				}
+				executor.Become(ttyin, env, command)
+			}
+			return code, err
+		}
+	}
+
+	return ExitOk, nil
+}

src/proxy_unix.go

@@ -0,0 +1,38 @@
+//go:build !windows
+
+package fzf
+
+import (
+	"io"
+	"os"
+
+	"golang.org/x/sys/unix"
+)
+
+func sh() (string, error) {
+	return "sh", nil
+}
+
+func mkfifo(path string, mode uint32) (string, error) {
+	return path, unix.Mkfifo(path, mode)
+}
+
+func withOutputPipe(output string, task func(io.ReadCloser)) error {
+	outputFile, err := os.OpenFile(output, os.O_RDONLY, 0)
+	if err != nil {
+		return err
+	}
+	task(outputFile)
+	outputFile.Close()
+	return nil
+}
+
+func withInputPipe(input string, task func(io.WriteCloser)) error {
+	inputFile, err := os.OpenFile(input, os.O_WRONLY, 0)
+	if err != nil {
+		return err
+	}
+	task(inputFile)
+	inputFile.Close()
+	return nil
+}

src/proxy_windows.go

@@ -0,0 +1,81 @@
+//go:build windows
+
+package fzf
+
+import (
+	"fmt"
+	"io"
+	"os/exec"
+	"strconv"
+	"strings"
+	"sync/atomic"
+)
+
+var shPath atomic.Value
+
+func sh() (string, error) {
+	if cached := shPath.Load(); cached != nil {
+		return cached.(string), nil
+	}
+
+	cmd := exec.Command("cygpath", "-w", "/usr/bin/sh")
+	bytes, err := cmd.Output()
+	if err != nil {
+		return "", err
+	}
+
+	sh := strings.TrimSpace(string(bytes))
+	shPath.Store(sh)
+	return sh, nil
+}
+
+func mkfifo(path string, mode uint32) (string, error) {
+	m := strconv.FormatUint(uint64(mode), 8)
+	sh, err := sh()
+	if err != nil {
+		return path, err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command mkfifo -m %s %q`, m, path))
+	if err := cmd.Run(); err != nil {
+		return path, err
+	}
+	return path + ".lnk", nil
+}
+
+func withOutputPipe(output string, task func(io.ReadCloser)) error {
+	sh, err := sh()
+	if err != nil {
+		return err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command cat %q`, output))
+	outputFile, err := cmd.StdoutPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+
+	task(outputFile)
+	cmd.Wait()
+	return nil
+}
+
+func withInputPipe(input string, task func(io.WriteCloser)) error {
+	sh, err := sh()
+	if err != nil {
+		return err
+	}
+	cmd := exec.Command(sh, "-c", fmt.Sprintf(`command cat - > %q`, input))
+	inputFile, err := cmd.StdinPipe()
+	if err != nil {
+		return err
+	}
+	if err := cmd.Start(); err != nil {
+		return err
+	}
+	task(inputFile)
+	inputFile.Close()
+	cmd.Wait()
+	return nil
+}

src/reader.go

@@ -18,20 +18,22 @@ import (
 // Reader reads from command or standard input
 type Reader struct {
 	pusher   func([]byte) bool
+	executor *util.Executor
 	eventBox *util.EventBox
 	delimNil bool
 	event    int32
 	finChan  chan bool
 	mutex    sync.Mutex
 	exec     *exec.Cmd
+	execOut  io.ReadCloser
 	command  *string
 	killed   bool
 	wait     bool
 }
 
 // NewReader returns new Reader object
-func NewReader(pusher func([]byte) bool, eventBox *util.EventBox, delimNil bool, wait bool) *Reader {
-	return &Reader{pusher, eventBox, delimNil, int32(EvtReady), make(chan bool, 1), sync.Mutex{}, nil, nil, false, wait}
+func NewReader(pusher func([]byte) bool, eventBox *util.EventBox, executor *util.Executor, delimNil bool, wait bool) *Reader {
+	return &Reader{pusher, executor, eventBox, delimNil, int32(EvtReady), make(chan bool, 1), sync.Mutex{}, nil, nil, nil, false, wait}
 }
 
 func (r *Reader) startEventPoller() {
@@ -78,6 +80,7 @@ func (r *Reader) terminate() {
 	r.mutex.Lock()
 	r.killed = true
 	if r.exec != nil && r.exec.Process != nil {
+		r.execOut.Close()
 		util.KillCommand(r.exec)
 	} else {
 		os.Stdin.Close()
@@ -85,18 +88,34 @@ func (r *Reader) terminate() {
 	r.mutex.Unlock()
 }
 
-func (r *Reader) restart(command string, environ []string) {
+func (r *Reader) restart(command commandSpec, environ []string) {
 	r.event = int32(EvtReady)
 	r.startEventPoller()
-	success := r.readFromCommand(command, environ)
+	success := r.readFromCommand(command.command, environ)
 	r.fin(success)
+	removeFiles(command.tempFiles)
+}
+
+func (r *Reader) readChannel(inputChan chan string) bool {
+	for {
+		item, more := <-inputChan
+		if !more {
+			break
+		}
+		if r.pusher([]byte(item)) {
+			atomic.StoreInt32(&r.event, int32(EvtReadNew))
+		}
+	}
+	return true
 }
 
 // ReadSource reads data from the default command or from standard input
-func (r *Reader) ReadSource(root string, opts walkerOpts, ignores []string) {
+func (r *Reader) ReadSource(inputChan chan string, root string, opts walkerOpts, ignores []string) {
 	r.startEventPoller()
 	var success bool
-	if util.IsTty() {
+	if inputChan != nil {
+		success = r.readChannel(inputChan)
+	} else if util.IsTty(os.Stdin) {
 		cmd := os.Getenv("FZF_DEFAULT_COMMAND")
 		if len(cmd) == 0 {
 			success = r.readFiles(root, opts, ignores)
@@ -147,7 +166,7 @@ func (r *Reader) feed(src io.Reader) {
 		}
 
 		// We're not making any progress after 100 tries. Stop.
-		if n == 0 && err == nil {
+		if n == 0 {
 			break
 		}
 
@@ -242,20 +261,27 @@ func (r *Reader) readFromCommand(command string, environ []string) bool {
 	r.mutex.Lock()
 	r.killed = false
 	r.command = &command
-	r.exec = util.ExecCommand(command, true)
+	r.exec = r.executor.ExecCommand(command, true)
 	if environ != nil {
 		r.exec.Env = environ
 	}
-	out, err := r.exec.StdoutPipe()
+
+	var err error
+	r.execOut, err = r.exec.StdoutPipe()
 	if err != nil {
+		r.exec = nil
 		r.mutex.Unlock()
 		return false
 	}
+
 	err = r.exec.Start()
-	r.mutex.Unlock()
 	if err != nil {
+		r.exec = nil
+		r.mutex.Unlock()
 		return false
 	}
-	r.feed(out)
+
+	r.mutex.Unlock()
+	r.feed(r.execOut)
 	return r.exec.Wait() == nil
 }

src/reader_test.go

@@ -10,9 +10,10 @@ import (
 func TestReadFromCommand(t *testing.T) {
 	strs := []string{}
 	eb := util.NewEventBox()
+	exec := util.NewExecutor("")
 	reader := NewReader(
 		func(s []byte) bool { strs = append(strs, string(s)); return true },
-		eb, false, true)
+		eb, exec, false, true)
 
 	reader.startEventPoller()
 

src/result.go

@@ -15,6 +15,7 @@ type Offset [2]int32
 type colorOffset struct {
 	offset [2]int32
 	color  tui.ColorPair
+	match  bool
 }
 
 type Result struct {
@@ -109,7 +110,7 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 	if len(itemColors) == 0 {
 		var offsets []colorOffset
 		for _, off := range matchOffsets {
-			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch})
+			offsets = append(offsets, colorOffset{offset: [2]int32{off[0], off[1]}, color: colMatch, match: true})
 		}
 		return offsets
 	}
@@ -193,12 +194,13 @@ func (result *Result) colorOffsets(matchOffsets []Offset, theme *tui.ColorTheme,
 					}
 				}
 				colors = append(colors, colorOffset{
-					offset: [2]int32{int32(start), int32(idx)}, color: color})
+					offset: [2]int32{int32(start), int32(idx)}, color: color, match: true})
 			} else {
 				ansi := itemColors[curr-1]
 				colors = append(colors, colorOffset{
 					offset: [2]int32{int32(start), int32(idx)},
-					color:  ansiToColorPair(ansi, colBase)})
+					color:  ansiToColorPair(ansi, colBase),
+					match:  false})
 			}
 		}
 	}

src/server.go

@@ -73,28 +73,28 @@ func parseListenAddress(address string) (listenAddress, error) {
 	return listenAddress{parts[0], port}, nil
 }
 
-func startHttpServer(address listenAddress, actionChannel chan []*action, responseChannel chan string) (int, error) {
+func startHttpServer(address listenAddress, actionChannel chan []*action, responseChannel chan string) (net.Listener, int, error) {
 	host := address.host
 	port := address.port
 	apiKey := os.Getenv("FZF_API_KEY")
 	if !address.IsLocal() && len(apiKey) == 0 {
-		return port, fmt.Errorf("FZF_API_KEY is required to allow remote access")
+		return nil, port, errors.New("FZF_API_KEY is required to allow remote access")
 	}
 	addrStr := fmt.Sprintf("%s:%d", host, port)
 	listener, err := net.Listen("tcp", addrStr)
 	if err != nil {
-		return port, fmt.Errorf("failed to listen on %s", addrStr)
+		return nil, port, fmt.Errorf("failed to listen on %s", addrStr)
 	}
 	if port == 0 {
 		addr := listener.Addr().String()
 		parts := strings.Split(addr, ":")
 		if len(parts) < 2 {
-			return port, fmt.Errorf("cannot extract port: %s", addr)
+			return nil, port, fmt.Errorf("cannot extract port: %s", addr)
 		}
 		var err error
 		port, err = strconv.Atoi(parts[len(parts)-1])
 		if err != nil {
-			return port, err
+			return nil, port, err
 		}
 	}
 
@@ -109,18 +109,16 @@ func startHttpServer(address listenAddress, actionChannel chan []*action, respon
 			conn, err := listener.Accept()
 			if err != nil {
 				if errors.Is(err, net.ErrClosed) {
-					break
-				} else {
-					continue
+					return
 				}
+				continue
 			}
 			conn.Write([]byte(server.handleHttpRequest(conn)))
 			conn.Close()
 		}
-		listener.Close()
 	}()
 
-	return port, nil
+	return listener, port, nil
 }
 
 // Here we are writing a simplistic HTTP server without using net/http
@@ -217,12 +215,9 @@ func (server *httpServer) handleHttpRequest(conn net.Conn) string {
 	}
 	body = body[:contentLength]
 
-	errorMessage := ""
-	actions := parseSingleActionList(strings.Trim(string(body), "\r\n"), func(message string) {
-		errorMessage = message
-	})
-	if len(errorMessage) > 0 {
-		return bad(errorMessage)
+	actions, err := parseSingleActionList(strings.Trim(string(body), "\r\n"))
+	if err != nil {
+		return bad(err.Error())
 	}
 	if len(actions) == 0 {
 		return bad("no action specified")

src/terminal_test.go

@@ -13,7 +13,7 @@ import (
 )
 
 func replacePlaceholderTest(template string, stripAnsi bool, delimiter Delimiter, printsep string, forcePlus bool, query string, allItems []*Item) string {
-	return replacePlaceholder(replacePlaceholderParams{
+	replaced, _ := replacePlaceholder(replacePlaceholderParams{
 		template:   template,
 		stripAnsi:  stripAnsi,
 		delimiter:  delimiter,
@@ -23,7 +23,9 @@ func replacePlaceholderTest(template string, stripAnsi bool, delimiter Delimiter
 		allItems:   allItems,
 		lastAction: actBackwardDeleteCharEof,
 		prompt:     "prompt",
+		executor:   util.NewExecutor(""),
 	})
+	return replaced
 }
 
 func TestReplacePlaceholder(t *testing.T) {
@@ -244,6 +246,7 @@ func TestQuoteEntry(t *testing.T) {
 	unixStyle := quotes{``, `'`, `'\''`, `"`, `\`}
 	windowsStyle := quotes{`^`, `^"`, `'`, `\^"`, `\\`}
 	var effectiveStyle quotes
+	exec := util.NewExecutor("")
 
 	if util.IsWindows() {
 		effectiveStyle = windowsStyle
@@ -278,7 +281,7 @@ func TestQuoteEntry(t *testing.T) {
 	}
 
 	for input, expected := range tests {
-		escaped := quoteEntry(input)
+		escaped := exec.QuoteEntry(input)
 		expected = templateToString(expected, effectiveStyle)
 		if escaped != expected {
 			t.Errorf("Input: %s, expected: %s, actual %s", input, expected, escaped)
@@ -317,9 +320,9 @@ func TestUnixCommands(t *testing.T) {
 
 // purpose of this test is to demonstrate some shortcomings of fzf's templating system on Windows
 func TestWindowsCommands(t *testing.T) {
-	if !util.IsWindows() {
-		t.SkipNow()
-	}
+	// XXX Deprecated
+	t.SkipNow()
+
 	tests := []testCase{
 		// reference: give{template, query, items}, want{output OR match}
 

src/terminal_unix.go

@@ -5,26 +5,11 @@ package fzf
 import (
 	"os"
 	"os/signal"
-	"strings"
 	"syscall"
 
 	"golang.org/x/sys/unix"
 )
 
-var escaper *strings.Replacer
-
-func init() {
-	tokens := strings.Split(os.Getenv("SHELL"), "/")
-	if tokens[len(tokens)-1] == "fish" {
-		// https://fishshell.com/docs/current/language.html#quotes
-		// > The only meaningful escape sequences in single quotes are \', which
-		// > escapes a single quote and \\, which escapes the backslash symbol.
-		escaper = strings.NewReplacer("\\", "\\\\", "'", "\\'")
-	} else {
-		escaper = strings.NewReplacer("'", "'\\''")
-	}
-}
-
 func notifyOnResize(resizeChan chan<- os.Signal) {
 	signal.Notify(resizeChan, syscall.SIGWINCH)
 }
@@ -41,7 +26,3 @@ func notifyStop(p *os.Process) {
 func notifyOnCont(resizeChan chan<- os.Signal) {
 	signal.Notify(resizeChan, syscall.SIGCONT)
 }
-
-func quoteEntry(entry string) string {
-	return "'" + escaper.Replace(entry) + "'"
-}

src/terminal_windows.go

@@ -4,8 +4,6 @@ package fzf
 
 import (
 	"os"
-	"regexp"
-	"strings"
 )
 
 func notifyOnResize(resizeChan chan<- os.Signal) {
@@ -19,27 +17,3 @@ func notifyStop(p *os.Process) {
 func notifyOnCont(resizeChan chan<- os.Signal) {
 	// NOOP
 }
-
-func quoteEntry(entry string) string {
-	shell := os.Getenv("SHELL")
-	if len(shell) == 0 {
-		shell = "cmd"
-	}
-
-	if strings.Contains(shell, "cmd") {
-		// backslash escaping is done here for applications
-		// (see ripgrep test case in terminal_test.go#TestWindowsCommands)
-		escaped := strings.Replace(entry, `\`, `\\`, -1)
-		escaped = `"` + strings.Replace(escaped, `"`, `\"`, -1) + `"`
-		// caret is the escape character for cmd shell
-		r, _ := regexp.Compile(`[&|<>()@^%!"]`)
-		return r.ReplaceAllStringFunc(escaped, func(match string) string {
-			return "^" + match
-		})
-	} else if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
-		escaped := strings.Replace(entry, `"`, `\"`, -1)
-		return "'" + strings.Replace(escaped, "'", "''", -1) + "'"
-	} else {
-		return "'" + strings.Replace(entry, "'", "'\\''", -1) + "'"
-	}
-}

src/tmux.go

@@ -0,0 +1,57 @@
+package fzf
+
+import (
+	"os"
+	"os/exec"
+
+	"github.com/junegunn/fzf/src/tui"
+)
+
+func runTmux(args []string, opts *Options) (int, error) {
+	// Prepare arguments
+	fzf := args[0]
+	args = append([]string{"--bind=ctrl-z:ignore"}, args[1:]...)
+	if opts.BorderShape == tui.BorderUndefined {
+		args = append(args, "--border")
+	}
+	argStr := escapeSingleQuote(fzf)
+	for _, arg := range args {
+		argStr += " " + escapeSingleQuote(arg)
+	}
+	argStr += ` --no-tmux --no-height`
+
+	// Get current directory
+	dir, err := os.Getwd()
+	if err != nil {
+		dir = "."
+	}
+
+	// Set tmux options for popup placement
+	// C        Both    The centre of the terminal
+	// R        -x      The right side of the terminal
+	// P        Both    The bottom left of the pane
+	// M        Both    The mouse position
+	// W        Both    The window position on the status line
+	// S        -y      The line above or below the status line
+	tmuxArgs := []string{"display-popup", "-E", "-B", "-d", dir}
+	switch opts.Tmux.position {
+	case posUp:
+		tmuxArgs = append(tmuxArgs, "-xC", "-y0")
+	case posDown:
+		tmuxArgs = append(tmuxArgs, "-xC", "-yS")
+	case posLeft:
+		tmuxArgs = append(tmuxArgs, "-x0", "-yC")
+	case posRight:
+		tmuxArgs = append(tmuxArgs, "-xR", "-yC")
+	case posCenter:
+		tmuxArgs = append(tmuxArgs, "-xC", "-yC")
+	}
+	tmuxArgs = append(tmuxArgs, "-w"+opts.Tmux.width.String())
+	tmuxArgs = append(tmuxArgs, "-h"+opts.Tmux.height.String())
+
+	return runProxy(argStr, func(temp string) *exec.Cmd {
+		sh, _ := sh()
+		tmuxArgs = append(tmuxArgs, sh, temp)
+		return exec.Command("tmux", tmuxArgs...)
+	}, opts, true)
+}

src/tokenizer.go

@@ -91,7 +91,7 @@ func withPrefixLengths(tokens []string, begin int) []Token {
 
 	prefixLength := begin
 	for idx := range tokens {
-		chars := util.ToChars(sbytes(tokens[idx]))
+		chars := util.ToChars(stringBytes(tokens[idx]))
 		ret[idx] = Token{&chars, int32(prefixLength)}
 		prefixLength += chars.Length()
 	}
@@ -187,7 +187,7 @@ func Transform(tokens []Token, withNth []Range) []Token {
 		if r.begin == r.end {
 			idx := r.begin
 			if idx == rangeEllipsis {
-				chars := util.ToChars(sbytes(joinTokens(tokens)))
+				chars := util.ToChars(stringBytes(joinTokens(tokens)))
 				parts = append(parts, &chars)
 			} else {
 				if idx < 0 {

src/tokenizer_test.go

@@ -71,14 +71,14 @@ func TestTransform(t *testing.T) {
 	{
 		tokens := Tokenize(input, Delimiter{})
 		{
-			ranges := splitNth("1,2,3")
+			ranges, _ := splitNth("1,2,3")
 			tx := Transform(tokens, ranges)
 			if joinTokens(tx) != "abc:  def:  ghi:  " {
 				t.Errorf("%s", tx)
 			}
 		}
 		{
-			ranges := splitNth("1..2,3,2..,1")
+			ranges, _ := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
 			if string(joinTokens(tx)) != "abc:  def:  ghi:  def:  ghi:  jklabc:  " ||
 				len(tx) != 4 ||
@@ -93,7 +93,7 @@ func TestTransform(t *testing.T) {
 	{
 		tokens := Tokenize(input, delimiterRegexp(":"))
 		{
-			ranges := splitNth("1..2,3,2..,1")
+			ranges, _ := splitNth("1..2,3,2..,1")
 			tx := Transform(tokens, ranges)
 			if joinTokens(tx) != "  abc:  def:  ghi:  def:  ghi:  jkl  abc:" ||
 				len(tx) != 4 ||
@@ -108,5 +108,6 @@ func TestTransform(t *testing.T) {
 }
 
 func TestTransformIndexOutOfBounds(t *testing.T) {
-	Transform([]Token{}, splitNth("1"))
+	s, _ := splitNth("1")
+	Transform([]Token{}, s)
 }

src/tui/dummy.go

@@ -8,7 +8,7 @@ func HasFullscreenRenderer() bool {
 	return false
 }
 
-var DefaultBorderShape BorderShape = BorderRounded
+var DefaultBorderShape = BorderRounded
 
 func (a Attr) Merge(b Attr) Attr {
 	return a | b
@@ -29,7 +29,7 @@ const (
 	StrikeThrough = Attr(1 << 7)
 )
 
-func (r *FullscreenRenderer) Init()                              {}
+func (r *FullscreenRenderer) Init() error                        { return nil }
 func (r *FullscreenRenderer) Resize(maxHeightFunc func(int) int) {}
 func (r *FullscreenRenderer) Pause(bool)                         {}
 func (r *FullscreenRenderer) Resume(bool, bool)                  {}

src/tui/eventtype_string.go

@@ -83,34 +83,36 @@ func _() {
 	_ = x[Alt-72]
 	_ = x[CtrlAlt-73]
 	_ = x[Invalid-74]
-	_ = x[Mouse-75]
-	_ = x[DoubleClick-76]
-	_ = x[LeftClick-77]
-	_ = x[RightClick-78]
-	_ = x[SLeftClick-79]
-	_ = x[SRightClick-80]
-	_ = x[ScrollUp-81]
-	_ = x[ScrollDown-82]
-	_ = x[SScrollUp-83]
-	_ = x[SScrollDown-84]
-	_ = x[PreviewScrollUp-85]
-	_ = x[PreviewScrollDown-86]
-	_ = x[Resize-87]
-	_ = x[Change-88]
-	_ = x[BackwardEOF-89]
-	_ = x[Start-90]
-	_ = x[Load-91]
-	_ = x[Focus-92]
-	_ = x[One-93]
-	_ = x[Zero-94]
-	_ = x[Result-95]
-	_ = x[Jump-96]
-	_ = x[JumpCancel-97]
+	_ = x[Fatal-75]
+	_ = x[Mouse-76]
+	_ = x[DoubleClick-77]
+	_ = x[LeftClick-78]
+	_ = x[RightClick-79]
+	_ = x[SLeftClick-80]
+	_ = x[SRightClick-81]
+	_ = x[ScrollUp-82]
+	_ = x[ScrollDown-83]
+	_ = x[SScrollUp-84]
+	_ = x[SScrollDown-85]
+	_ = x[PreviewScrollUp-86]
+	_ = x[PreviewScrollDown-87]
+	_ = x[Resize-88]
+	_ = x[Change-89]
+	_ = x[BackwardEOF-90]
+	_ = x[Start-91]
+	_ = x[Load-92]
+	_ = x[Focus-93]
+	_ = x[One-94]
+	_ = x[Zero-95]
+	_ = x[Result-96]
+	_ = x[Jump-97]
+	_ = x[JumpCancel-98]
+	_ = x[ClickHeader-99]
 }
 
-const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLCtrlMCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancel"
+const _EventType_name = "RuneCtrlACtrlBCtrlCCtrlDCtrlECtrlFCtrlGCtrlHTabCtrlJCtrlKCtrlLCtrlMCtrlNCtrlOCtrlPCtrlQCtrlRCtrlSCtrlTCtrlUCtrlVCtrlWCtrlXCtrlYCtrlZEscCtrlSpaceCtrlDeleteCtrlBackSlashCtrlRightBracketCtrlCaretCtrlSlashShiftTabBackspaceDeletePageUpPageDownUpDownLeftRightHomeEndInsertShiftUpShiftDownShiftLeftShiftRightShiftDeleteF1F2F3F4F5F6F7F8F9F10F11F12AltBackspaceAltUpAltDownAltLeftAltRightAltShiftUpAltShiftDownAltShiftLeftAltShiftRightAltCtrlAltInvalidFatalMouseDoubleClickLeftClickRightClickSLeftClickSRightClickScrollUpScrollDownSScrollUpSScrollDownPreviewScrollUpPreviewScrollDownResizeChangeBackwardEOFStartLoadFocusOneZeroResultJumpJumpCancelClickHeader"
 
-var _EventType_index = [...]uint16{0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97, 102, 107, 112, 117, 122, 127, 132, 135, 144, 154, 167, 183, 192, 201, 209, 218, 224, 230, 238, 240, 244, 248, 253, 257, 260, 266, 273, 282, 291, 301, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 333, 336, 339, 351, 356, 363, 370, 378, 388, 400, 412, 425, 428, 435, 442, 447, 458, 467, 477, 487, 498, 506, 516, 525, 536, 551, 568, 574, 580, 591, 596, 600, 605, 608, 612, 618, 622, 632}
+var _EventType_index = [...]uint16{0, 4, 9, 14, 19, 24, 29, 34, 39, 44, 47, 52, 57, 62, 67, 72, 77, 82, 87, 92, 97, 102, 107, 112, 117, 122, 127, 132, 135, 144, 154, 167, 183, 192, 201, 209, 218, 224, 230, 238, 240, 244, 248, 253, 257, 260, 266, 273, 282, 291, 301, 312, 314, 316, 318, 320, 322, 324, 326, 328, 330, 333, 336, 339, 351, 356, 363, 370, 378, 388, 400, 412, 425, 428, 435, 442, 447, 452, 463, 472, 482, 492, 503, 511, 521, 530, 541, 556, 573, 579, 585, 596, 601, 605, 610, 613, 617, 623, 627, 637, 648}
 
 func (i EventType) String() string {
 	if i < 0 || i >= EventType(len(_EventType_index)-1) {

src/tui/light.go

@@ -2,6 +2,7 @@ package tui
 
 import (
 	"bytes"
+	"errors"
 	"fmt"
 	"os"
 	"regexp"
@@ -10,6 +11,7 @@ import (
 	"time"
 	"unicode/utf8"
 
+	"github.com/junegunn/fzf/src/util"
 	"github.com/rivo/uniseg"
 
 	"golang.org/x/term"
@@ -27,8 +29,8 @@ const (
 
 const consoleDevice string = "/dev/tty"
 
-var offsetRegexp *regexp.Regexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
-var offsetRegexpBegin *regexp.Regexp = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
+var offsetRegexp = regexp.MustCompile("(.*)\x1b\\[([0-9]+);([0-9]+)R")
+var offsetRegexpBegin = regexp.MustCompile("^\x1b\\[[0-9]+;[0-9]+R")
 
 func (r *LightRenderer) PassThrough(str string) {
 	r.queued.WriteString("\x1b7" + str + "\x1b8")
@@ -71,13 +73,14 @@ func (r *LightRenderer) csi(code string) string {
 
 func (r *LightRenderer) flush() {
 	if r.queued.Len() > 0 {
-		fmt.Fprint(os.Stderr, "\x1b[?7l\x1b[?25l"+r.queued.String()+"\x1b[?25h\x1b[?7h")
+		fmt.Fprint(r.ttyout, "\x1b[?7l\x1b[?25l"+r.queued.String()+"\x1b[?25h\x1b[?7h")
 		r.queued.Reset()
 	}
 }
 
 // Light renderer
 type LightRenderer struct {
+	closed        *util.AtomicBool
 	theme         *ColorTheme
 	mouse         bool
 	forceBlack    bool
@@ -85,6 +88,7 @@ type LightRenderer struct {
 	prevDownTime  time.Time
 	clicks        [][2]int
 	ttyin         *os.File
+	ttyout        *os.File
 	buffer        []byte
 	origState     *term.State
 	width         int
@@ -123,19 +127,25 @@ type LightWindow struct {
 	bg       Color
 }
 
-func NewLightRenderer(theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) Renderer {
+func NewLightRenderer(ttyin *os.File, theme *ColorTheme, forceBlack bool, mouse bool, tabstop int, clearOnExit bool, fullscreen bool, maxHeightFunc func(int) int) (Renderer, error) {
+	out, err := openTtyOut()
+	if err != nil {
+		out = os.Stderr
+	}
 	r := LightRenderer{
+		closed:        util.NewAtomicBool(false),
 		theme:         theme,
 		forceBlack:    forceBlack,
 		mouse:         mouse,
 		clearOnExit:   clearOnExit,
-		ttyin:         openTtyIn(),
+		ttyin:         ttyin,
+		ttyout:        out,
 		yoffset:       0,
 		tabstop:       tabstop,
 		fullscreen:    fullscreen,
 		upOneLine:     false,
 		maxHeightFunc: maxHeightFunc}
-	return &r
+	return &r, nil
 }
 
 func repeat(r rune, times int) string {
@@ -153,11 +163,11 @@ func atoi(s string, defaultValue int) int {
 	return value
 }
 
-func (r *LightRenderer) Init() {
+func (r *LightRenderer) Init() error {
 	r.escDelay = atoi(os.Getenv("ESCDELAY"), defaultEscDelay)
 
 	if err := r.initPlatform(); err != nil {
-		errorExit(err.Error())
+		return err
 	}
 	r.updateTerminalSize()
 	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
@@ -195,6 +205,7 @@ func (r *LightRenderer) Init() {
 	if !r.fullscreen && r.mouse {
 		r.yoffset, _ = r.findOffset()
 	}
+	return nil
 }
 
 func (r *LightRenderer) Resize(maxHeightFunc func(int) int) {
@@ -233,15 +244,16 @@ func getEnv(name string, defaultValue int) int {
 	return atoi(env, defaultValue)
 }
 
-func (r *LightRenderer) getBytes() []byte {
-	return r.getBytesInternal(r.buffer, false)
+func (r *LightRenderer) getBytes() ([]byte, error) {
+	bytes, err := r.getBytesInternal(r.buffer, false)
+	return bytes, err
 }
 
-func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
+func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) ([]byte, error) {
 	c, ok := r.getch(nonblock)
 	if !nonblock && !ok {
 		r.Close()
-		errorExit("Failed to read " + consoleDevice)
+		return nil, errors.New("failed to read " + consoleDevice)
 	}
 
 	retries := 0
@@ -272,19 +284,23 @@ func (r *LightRenderer) getBytesInternal(buffer []byte, nonblock bool) []byte {
 		// so terminate fzf immediately.
 		if len(buffer) > maxInputBuffer {
 			r.Close()
-			panic(fmt.Sprintf("Input buffer overflow (%d): %v", len(buffer), buffer))
+			return nil, fmt.Errorf("input buffer overflow (%d): %v", len(buffer), buffer)
 		}
 	}
 
-	return buffer
+	return buffer, nil
 }
 
 func (r *LightRenderer) GetChar() Event {
+	var err error
 	if len(r.buffer) == 0 {
-		r.buffer = r.getBytes()
+		r.buffer, err = r.getBytes()
+		if err != nil {
+			return Event{Fatal, 0, nil}
+		}
 	}
 	if len(r.buffer) == 0 {
-		panic("Empty buffer")
+		return Event{Fatal, 0, nil}
 	}
 
 	sz := 1
@@ -315,7 +331,9 @@ func (r *LightRenderer) GetChar() Event {
 		ev := r.escSequence(&sz)
 		// Second chance
 		if ev.Type == Invalid {
-			r.buffer = r.getBytes()
+			if r.buffer, err = r.getBytes(); err != nil {
+				return Event{Fatal, 0, nil}
+			}
 			ev = r.escSequence(&sz)
 		}
 		return ev
@@ -738,6 +756,7 @@ func (r *LightRenderer) Close() {
 	r.flush()
 	r.closePlatform()
 	r.restoreTerminal()
+	r.closed.Set(true)
 }
 
 func (r *LightRenderer) Top() int {
@@ -821,44 +840,32 @@ func (w *LightWindow) drawBorderHorizontal(top, bottom bool) {
 		color = ColPreviewBorder
 	}
 	hw := runeWidth(w.border.top)
-	pad := repeat(' ', w.width/hw)
-
-	w.Move(0, 0)
 	if top {
+		w.Move(0, 0)
 		w.CPrint(color, repeat(w.border.top, w.width/hw))
-	} else {
-		w.CPrint(color, pad)
 	}
 
-	for y := 1; y < w.height-1; y++ {
-		w.Move(y, 0)
-		w.CPrint(color, pad)
-	}
-
-	w.Move(w.height-1, 0)
 	if bottom {
+		w.Move(w.height-1, 0)
 		w.CPrint(color, repeat(w.border.bottom, w.width/hw))
-	} else {
-		w.CPrint(color, pad)
 	}
 }
 
 func (w *LightWindow) drawBorderVertical(left, right bool) {
-	width := w.width - 2
-	if !left || !right {
-		width++
-	}
+	vw := runeWidth(w.border.left)
 	color := ColBorder
 	if w.preview {
 		color = ColPreviewBorder
 	}
 	for y := 0; y < w.height; y++ {
-		w.Move(y, 0)
 		if left {
+			w.Move(y, 0)
 			w.CPrint(color, string(w.border.left))
+			w.CPrint(color, " ") // Margin
 		}
-		w.CPrint(color, repeat(' ', width))
 		if right {
+			w.Move(y, w.width-vw-1)
+			w.CPrint(color, " ") // Margin
 			w.CPrint(color, string(w.border.right))
 		}
 	}
@@ -880,7 +887,10 @@ func (w *LightWindow) drawBorderAround(onlyHorizontal bool) {
 		for y := 1; y < w.height-1; y++ {
 			w.Move(y, 0)
 			w.CPrint(color, string(w.border.left))
-			w.CPrint(color, repeat(' ', w.width-vw*2))
+			w.CPrint(color, " ") // Margin
+
+			w.Move(y, w.width-vw-1)
+			w.CPrint(color, " ") // Margin
 			w.CPrint(color, string(w.border.right))
 		}
 	}
@@ -1011,7 +1021,7 @@ func (w *LightWindow) Print(text string) {
 }
 
 func cleanse(str string) string {
-	return strings.Replace(str, "\x1b", "", -1)
+	return strings.ReplaceAll(str, "\x1b", "")
 }
 
 func (w *LightWindow) CPrint(pair ColorPair, text string) {

src/tui/light_unix.go

@@ -3,7 +3,7 @@
 package tui
 
 import (
-	"fmt"
+	"errors"
 	"os"
 	"os/exec"
 	"strings"
@@ -45,22 +45,29 @@ func (r *LightRenderer) initPlatform() error {
 }
 
 func (r *LightRenderer) closePlatform() {
-	// NOOP
+	r.ttyout.Close()
 }
 
-func openTtyIn() *os.File {
-	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
+func openTty(mode int) (*os.File, error) {
+	in, err := os.OpenFile(consoleDevice, mode, 0)
 	if err != nil {
 		tty := ttyname()
 		if len(tty) > 0 {
-			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
-				return in
+			if in, err := os.OpenFile(tty, mode, 0); err == nil {
+				return in, nil
 			}
 		}
-		fmt.Fprintln(os.Stderr, "Failed to open "+consoleDevice)
-		util.Exit(2)
+		return nil, errors.New("failed to open " + consoleDevice)
 	}
-	return in
+	return in, nil
+}
+
+func openTtyIn() (*os.File, error) {
+	return openTty(syscall.O_RDONLY)
+}
+
+func openTtyOut() (*os.File, error) {
+	return openTty(syscall.O_WRONLY)
 }
 
 func (r *LightRenderer) setupTerminal() {
@@ -86,9 +93,14 @@ func (r *LightRenderer) updateTerminalSize() {
 func (r *LightRenderer) findOffset() (row int, col int) {
 	r.csi("6n")
 	r.flush()
+	var err error
 	bytes := []byte{}
 	for tries := 0; tries < offsetPollTries; tries++ {
-		bytes = r.getBytesInternal(bytes, tries > 0)
+		bytes, err = r.getBytesInternal(bytes, tries > 0)
+		if err != nil {
+			return -1, -1
+		}
+
 		offsets := offsetRegexp.FindSubmatch(bytes)
 		if len(offsets) > 3 {
 			// Add anything we skipped over to the input buffer

src/tui/light_windows.go

@@ -72,7 +72,7 @@ func (r *LightRenderer) initPlatform() error {
 	go func() {
 		fd := int(r.inHandle)
 		b := make([]byte, 1)
-		for {
+		for !r.closed.Get() {
 			// HACK: if run from PSReadline, something resets ConsoleMode to remove ENABLE_VIRTUAL_TERMINAL_INPUT.
 			_ = windows.SetConsoleMode(windows.Handle(r.inHandle), consoleFlagsInput)
 
@@ -91,9 +91,13 @@ func (r *LightRenderer) closePlatform() {
 	windows.SetConsoleMode(windows.Handle(r.inHandle), r.origStateInput)
 }
 
-func openTtyIn() *os.File {
+func openTtyIn() (*os.File, error) {
 	// not used
-	return nil
+	return nil, nil
+}
+
+func openTtyOut() (*os.File, error) {
+	return os.Stderr, nil
 }
 
 func (r *LightRenderer) setupTerminal() error {

src/tui/tcell.go

@@ -7,7 +7,6 @@ import (
 	"time"
 
 	"github.com/gdamore/tcell/v2"
-	"github.com/gdamore/tcell/v2/encoding"
 	"github.com/junegunn/fzf/src/util"
 
 	"github.com/rivo/uniseg"
@@ -146,13 +145,13 @@ var (
 	_initialResize   bool = true
 )
 
-func (r *FullscreenRenderer) initScreen() {
+func (r *FullscreenRenderer) initScreen() error {
 	s, e := tcell.NewScreen()
 	if e != nil {
-		errorExit(e.Error())
+		return e
 	}
 	if e = s.Init(); e != nil {
-		errorExit(e.Error())
+		return e
 	}
 	if r.mouse {
 		s.EnableMouse()
@@ -160,16 +159,21 @@ func (r *FullscreenRenderer) initScreen() {
 		s.DisableMouse()
 	}
 	_screen = s
+
+	return nil
 }
 
-func (r *FullscreenRenderer) Init() {
+func (r *FullscreenRenderer) Init() error {
 	if os.Getenv("TERM") == "cygwin" {
 		os.Setenv("TERM", "")
 	}
-	encoding.Register()
 
-	r.initScreen()
+	if err := r.initScreen(); err != nil {
+		return err
+	}
 	initTheme(r.theme, r.defaultTheme(), r.forceBlack)
+
+	return nil
 }
 
 func (r *FullscreenRenderer) Top() int {
@@ -561,7 +565,11 @@ func fill(x, y, w, h int, n ColorPair, r rune) {
 }
 
 func (w *TcellWindow) Erase() {
-	fill(w.left-1, w.top, w.width+1, w.height-1, w.normal, ' ')
+	if w.borderStyle.shape.HasLeft() {
+		fill(w.left-1, w.top, w.width, w.height-1, w.normal, ' ')
+	} else {
+		fill(w.left, w.top, w.width-1, w.height-1, w.normal, ' ')
+	}
 	w.drawBorder(false)
 }
 

src/tui/tcell_test.go

@@ -3,6 +3,7 @@
 package tui
 
 import (
+	"os"
 	"testing"
 
 	"github.com/gdamore/tcell/v2"
@@ -20,7 +21,7 @@ func assert(t *testing.T, context string, got interface{}, want interface{}) boo
 
 // Test the handling of the tcell keyboard events.
 func TestGetCharEventKey(t *testing.T) {
-	if util.ToTty() {
+	if util.IsTty(os.Stdout) {
 		// This test is skipped when output goes to terminal, because it causes
 		// some glitches:
 		// - output lines may not start at the beginning of a row which makes

src/tui/ttyname_unix.go

@@ -4,12 +4,19 @@ package tui
 
 import (
 	"os"
+	"sync/atomic"
 	"syscall"
 )
 
 var devPrefixes = [...]string{"/dev/pts/", "/dev/"}
 
+var tty atomic.Value
+
 func ttyname() string {
+	if cached := tty.Load(); cached != nil {
+		return cached.(string)
+	}
+
 	var stderr syscall.Stat_t
 	if syscall.Fstat(2, &stderr) != nil {
 		return ""
@@ -27,24 +34,21 @@ func ttyname() string {
 				continue
 			}
 			if stat, ok := info.Sys().(*syscall.Stat_t); ok && stat.Rdev == stderr.Rdev {
-				return prefix + file.Name()
+				value := prefix + file.Name()
+				tty.Store(value)
+				return value
 			}
 		}
 	}
 	return ""
 }
 
-// TtyIn returns terminal device to be used as STDIN, falls back to os.Stdin
-func TtyIn() *os.File {
-	in, err := os.OpenFile(consoleDevice, syscall.O_RDONLY, 0)
-	if err != nil {
-		tty := ttyname()
-		if len(tty) > 0 {
-			if in, err := os.OpenFile(tty, syscall.O_RDONLY, 0); err == nil {
-				return in
-			}
-		}
-		return os.Stdin
-	}
-	return in
+// TtyIn returns terminal device to read user input
+func TtyIn() (*os.File, error) {
+	return openTtyIn()
+}
+
+// TtyIn returns terminal device to write to
+func TtyOut() (*os.File, error) {
+	return openTtyOut()
 }

src/tui/ttyname_windows.go

@@ -2,13 +2,20 @@
 
 package tui
 
-import "os"
+import (
+	"os"
+)
 
 func ttyname() string {
 	return ""
 }
 
 // TtyIn on Windows returns os.Stdin
-func TtyIn() *os.File {
-	return os.Stdin
+func TtyIn() (*os.File, error) {
+	return os.Stdin, nil
+}
+
+// TtyIn on Windows returns nil
+func TtyOut() (*os.File, error) {
+	return nil, nil
 }

src/tui/tui.go

@@ -1,8 +1,6 @@
 package tui
 
 import (
-	"fmt"
-	"os"
 	"strconv"
 	"time"
 
@@ -104,6 +102,7 @@ const (
 	CtrlAlt
 
 	Invalid
+	Fatal
 
 	Mouse
 	DoubleClick
@@ -130,6 +129,7 @@ const (
 	Result
 	Jump
 	JumpCancel
+	ClickHeader
 )
 
 func (t EventType) AsEvent() Event {
@@ -303,6 +303,9 @@ type ColorTheme struct {
 	Disabled         ColorAttr
 	Fg               ColorAttr
 	Bg               ColorAttr
+	SelectedFg       ColorAttr
+	SelectedBg       ColorAttr
+	SelectedMatch    ColorAttr
 	PreviewFg        ColorAttr
 	PreviewBg        ColorAttr
 	DarkBg           ColorAttr
@@ -314,7 +317,7 @@ type ColorTheme struct {
 	Spinner          ColorAttr
 	Info             ColorAttr
 	Cursor           ColorAttr
-	Selected         ColorAttr
+	Marker           ColorAttr
 	Header           ColorAttr
 	Separator        ColorAttr
 	Scrollbar        ColorAttr
@@ -353,7 +356,8 @@ type MouseEvent struct {
 type BorderShape int
 
 const (
-	BorderNone BorderShape = iota
+	BorderUndefined BorderShape = iota
+	BorderNone
 	BorderRounded
 	BorderSharp
 	BorderBold
@@ -368,6 +372,14 @@ const (
 	BorderRight
 )
 
+func (s BorderShape) HasLeft() bool {
+	switch s {
+	case BorderNone, BorderRight, BorderTop, BorderBottom, BorderHorizontal: // No Left
+		return false
+	}
+	return true
+}
+
 func (s BorderShape) HasRight() bool {
 	switch s {
 	case BorderNone, BorderLeft, BorderTop, BorderBottom, BorderHorizontal: // No right
@@ -516,7 +528,7 @@ type TermSize struct {
 }
 
 type Renderer interface {
-	Init()
+	Init() error
 	Resize(maxHeightFunc func(int) int)
 	Pause(clear bool)
 	Resume(clear bool, sigcont bool)
@@ -595,12 +607,14 @@ var (
 	ColMatch                ColorPair
 	ColCursor               ColorPair
 	ColCursorEmpty          ColorPair
+	ColMarker               ColorPair
 	ColSelected             ColorPair
+	ColSelectedMatch        ColorPair
 	ColCurrent              ColorPair
 	ColCurrentMatch         ColorPair
 	ColCurrentCursor        ColorPair
 	ColCurrentCursorEmpty   ColorPair
-	ColCurrentSelected      ColorPair
+	ColCurrentMarker        ColorPair
 	ColCurrentSelectedEmpty ColorPair
 	ColSpinner              ColorPair
 	ColInfo                 ColorPair
@@ -622,6 +636,9 @@ func EmptyTheme() *ColorTheme {
 		Input:            ColorAttr{colUndefined, AttrUndefined},
 		Fg:               ColorAttr{colUndefined, AttrUndefined},
 		Bg:               ColorAttr{colUndefined, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{colUndefined, AttrUndefined},
 		Prompt:           ColorAttr{colUndefined, AttrUndefined},
 		Match:            ColorAttr{colUndefined, AttrUndefined},
@@ -630,7 +647,7 @@ func EmptyTheme() *ColorTheme {
 		Spinner:          ColorAttr{colUndefined, AttrUndefined},
 		Info:             ColorAttr{colUndefined, AttrUndefined},
 		Cursor:           ColorAttr{colUndefined, AttrUndefined},
-		Selected:         ColorAttr{colUndefined, AttrUndefined},
+		Marker:           ColorAttr{colUndefined, AttrUndefined},
 		Header:           ColorAttr{colUndefined, AttrUndefined},
 		Border:           ColorAttr{colUndefined, AttrUndefined},
 		BorderLabel:      ColorAttr{colUndefined, AttrUndefined},
@@ -652,6 +669,9 @@ func NoColorTheme() *ColorTheme {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colDefault, AttrUndefined},
+		SelectedBg:       ColorAttr{colDefault, AttrUndefined},
+		SelectedMatch:    ColorAttr{colDefault, AttrUndefined},
 		DarkBg:           ColorAttr{colDefault, AttrUndefined},
 		Prompt:           ColorAttr{colDefault, AttrUndefined},
 		Match:            ColorAttr{colDefault, Underline},
@@ -660,7 +680,7 @@ func NoColorTheme() *ColorTheme {
 		Spinner:          ColorAttr{colDefault, AttrUndefined},
 		Info:             ColorAttr{colDefault, AttrUndefined},
 		Cursor:           ColorAttr{colDefault, AttrUndefined},
-		Selected:         ColorAttr{colDefault, AttrUndefined},
+		Marker:           ColorAttr{colDefault, AttrUndefined},
 		Header:           ColorAttr{colDefault, AttrUndefined},
 		Border:           ColorAttr{colDefault, AttrUndefined},
 		BorderLabel:      ColorAttr{colDefault, AttrUndefined},
@@ -676,17 +696,15 @@ func NoColorTheme() *ColorTheme {
 	}
 }
 
-func errorExit(message string) {
-	fmt.Fprintln(os.Stderr, message)
-	util.Exit(2)
-}
-
 func init() {
 	Default16 = &ColorTheme{
 		Colored:          true,
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{colBlack, AttrUndefined},
 		Prompt:           ColorAttr{colBlue, AttrUndefined},
 		Match:            ColorAttr{colGreen, AttrUndefined},
@@ -695,7 +713,7 @@ func init() {
 		Spinner:          ColorAttr{colGreen, AttrUndefined},
 		Info:             ColorAttr{colWhite, AttrUndefined},
 		Cursor:           ColorAttr{colRed, AttrUndefined},
-		Selected:         ColorAttr{colMagenta, AttrUndefined},
+		Marker:           ColorAttr{colMagenta, AttrUndefined},
 		Header:           ColorAttr{colCyan, AttrUndefined},
 		Border:           ColorAttr{colBlack, AttrUndefined},
 		BorderLabel:      ColorAttr{colWhite, AttrUndefined},
@@ -714,6 +732,9 @@ func init() {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{236, AttrUndefined},
 		Prompt:           ColorAttr{110, AttrUndefined},
 		Match:            ColorAttr{108, AttrUndefined},
@@ -722,7 +743,7 @@ func init() {
 		Spinner:          ColorAttr{148, AttrUndefined},
 		Info:             ColorAttr{144, AttrUndefined},
 		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:         ColorAttr{168, AttrUndefined},
+		Marker:           ColorAttr{168, AttrUndefined},
 		Header:           ColorAttr{109, AttrUndefined},
 		Border:           ColorAttr{59, AttrUndefined},
 		BorderLabel:      ColorAttr{145, AttrUndefined},
@@ -741,6 +762,9 @@ func init() {
 		Input:            ColorAttr{colDefault, AttrUndefined},
 		Fg:               ColorAttr{colDefault, AttrUndefined},
 		Bg:               ColorAttr{colDefault, AttrUndefined},
+		SelectedFg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedBg:       ColorAttr{colUndefined, AttrUndefined},
+		SelectedMatch:    ColorAttr{colUndefined, AttrUndefined},
 		DarkBg:           ColorAttr{251, AttrUndefined},
 		Prompt:           ColorAttr{25, AttrUndefined},
 		Match:            ColorAttr{66, AttrUndefined},
@@ -749,7 +773,7 @@ func init() {
 		Spinner:          ColorAttr{65, AttrUndefined},
 		Info:             ColorAttr{101, AttrUndefined},
 		Cursor:           ColorAttr{161, AttrUndefined},
-		Selected:         ColorAttr{168, AttrUndefined},
+		Marker:           ColorAttr{168, AttrUndefined},
 		Header:           ColorAttr{31, AttrUndefined},
 		Border:           ColorAttr{145, AttrUndefined},
 		BorderLabel:      ColorAttr{59, AttrUndefined},
@@ -791,12 +815,15 @@ func initTheme(theme *ColorTheme, baseTheme *ColorTheme, forceBlack bool) {
 	theme.Spinner = o(baseTheme.Spinner, theme.Spinner)
 	theme.Info = o(baseTheme.Info, theme.Info)
 	theme.Cursor = o(baseTheme.Cursor, theme.Cursor)
-	theme.Selected = o(baseTheme.Selected, theme.Selected)
+	theme.Marker = o(baseTheme.Marker, theme.Marker)
 	theme.Header = o(baseTheme.Header, theme.Header)
 	theme.Border = o(baseTheme.Border, theme.Border)
 	theme.BorderLabel = o(baseTheme.BorderLabel, theme.BorderLabel)
 
 	// These colors are not defined in the base themes
+	theme.SelectedFg = o(theme.Fg, theme.SelectedFg)
+	theme.SelectedBg = o(theme.Bg, theme.SelectedBg)
+	theme.SelectedMatch = o(theme.Match, theme.SelectedMatch)
 	theme.Disabled = o(theme.Input, theme.Disabled)
 	theme.Gutter = o(theme.DarkBg, theme.Gutter)
 	theme.PreviewFg = o(theme.Fg, theme.PreviewFg)
@@ -822,17 +849,23 @@ func initPalette(theme *ColorTheme) {
 
 	ColPrompt = pair(theme.Prompt, theme.Bg)
 	ColNormal = pair(theme.Fg, theme.Bg)
+	ColSelected = pair(theme.SelectedFg, theme.SelectedBg)
 	ColInput = pair(theme.Input, theme.Bg)
 	ColDisabled = pair(theme.Disabled, theme.Bg)
 	ColMatch = pair(theme.Match, theme.Bg)
+	ColSelectedMatch = pair(theme.SelectedMatch, theme.SelectedBg)
 	ColCursor = pair(theme.Cursor, theme.Gutter)
 	ColCursorEmpty = pair(blank, theme.Gutter)
-	ColSelected = pair(theme.Selected, theme.Gutter)
+	if theme.SelectedBg.Color != theme.Bg.Color {
+		ColMarker = pair(theme.Marker, theme.SelectedBg)
+	} else {
+		ColMarker = pair(theme.Marker, theme.Gutter)
+	}
 	ColCurrent = pair(theme.Current, theme.DarkBg)
 	ColCurrentMatch = pair(theme.CurrentMatch, theme.DarkBg)
 	ColCurrentCursor = pair(theme.Cursor, theme.DarkBg)
 	ColCurrentCursorEmpty = pair(blank, theme.DarkBg)
-	ColCurrentSelected = pair(theme.Selected, theme.DarkBg)
+	ColCurrentMarker = pair(theme.Marker, theme.DarkBg)
 	ColCurrentSelectedEmpty = pair(blank, theme.DarkBg)
 	ColSpinner = pair(theme.Spinner, theme.Bg)
 	ColInfo = pair(theme.Info, theme.Bg)

src/util/atexit.go

@@ -1,7 +1,6 @@
 package util
 
 import (
-	"os"
 	"sync"
 )
 
@@ -25,14 +24,5 @@ func RunAtExitFuncs() {
 	for i := len(fns) - 1; i >= 0; i-- {
 		fns[i]()
 	}
-}
-
-// Exit executes any functions registered with AtExit() then exits the program
-// with os.Exit(code).
-//
-// NOTE: It must be used instead of os.Exit() since calling os.Exit() terminates
-// the program before any of the AtExit functions can run.
-func Exit(code int) {
-	defer os.Exit(code)
-	RunAtExitFuncs()
+	atExitFuncs = nil
 }

src/util/chars.go

@@ -1,6 +1,7 @@
 package util
 
 import (
+	"bytes"
 	"fmt"
 	"unicode"
 	"unicode/utf8"
@@ -74,6 +75,35 @@ func (chars *Chars) Bytes() []byte {
 	return chars.slice
 }
 
+func (chars *Chars) NumLines(atMost int) (int, bool) {
+	lines := 1
+	if runes := chars.optionalRunes(); runes != nil {
+		for _, r := range runes {
+			if r == '\n' {
+				lines++
+			}
+			if lines > atMost {
+				return atMost, true
+			}
+		}
+		return lines, false
+	}
+
+	for idx := 0; idx < len(chars.slice); idx++ {
+		found := bytes.IndexByte(chars.slice[idx:], '\n')
+		if found < 0 {
+			break
+		}
+
+		idx += found
+		lines++
+		if lines > atMost {
+			return atMost, true
+		}
+	}
+	return lines, false
+}
+
 func (chars *Chars) optionalRunes() []rune {
 	if chars.inBytes {
 		return nil

src/util/util.go

@@ -3,6 +3,7 @@ package util
 import (
 	"math"
 	"os"
+	"strconv"
 	"strings"
 	"time"
 
@@ -137,14 +138,10 @@ func DurWithin(
 	return val
 }
 
-// IsTty returns true if stdin is a terminal
-func IsTty() bool {
-	return isatty.IsTerminal(os.Stdin.Fd())
-}
-
-// ToTty returns true if stdout is a terminal
-func ToTty() bool {
-	return isatty.IsTerminal(os.Stdout.Fd())
+// IsTty returns true if the file is a terminal
+func IsTty(file *os.File) bool {
+	fd := file.Fd()
+	return isatty.IsTerminal(fd) || isatty.IsCygwinTerminal(fd)
 }
 
 // Once returns a function that returns the specified boolean value only once
@@ -188,3 +185,34 @@ func ToKebabCase(s string) string {
 	}
 	return strings.ToLower(name)
 }
+
+// CompareVersions compares two version strings
+func CompareVersions(v1, v2 string) int {
+	parts1 := strings.Split(v1, ".")
+	parts2 := strings.Split(v2, ".")
+
+	atoi := func(s string) int {
+		n, e := strconv.Atoi(s)
+		if e != nil {
+			return 0
+		}
+		return n
+	}
+
+	for i := 0; i < Max(len(parts1), len(parts2)); i++ {
+		var p1, p2 int
+		if i < len(parts1) {
+			p1 = atoi(parts1[i])
+		}
+		if i < len(parts2) {
+			p2 = atoi(parts2[i])
+		}
+
+		if p1 > p2 {
+			return 1
+		} else if p1 < p2 {
+			return -1
+		}
+	}
+	return 0
+}

src/util/util_test.go

@@ -203,3 +203,34 @@ func TestStringWidth(t *testing.T) {
 		t.Errorf("Expected: %d, Actual: %d", 1, w)
 	}
 }
+
+func TestCompareVersions(t *testing.T) {
+	assert := func(a, b string, expected int) {
+		if result := CompareVersions(a, b); result != expected {
+			t.Errorf("Expected: %d, Actual: %d", expected, result)
+		}
+	}
+
+	assert("2", "1", 1)
+	assert("2", "2", 0)
+	assert("2", "10", -1)
+
+	assert("2.1", "2.2", -1)
+	assert("2.1", "2.1.1", -1)
+
+	assert("1.2.3", "1.2.2", 1)
+	assert("1.2.3", "1.2.3", 0)
+	assert("1.2.3", "1.2.3.0", 0)
+	assert("1.2.3", "1.2.4", -1)
+
+	// Different number of parts
+	assert("1.0.0", "1", 0)
+	assert("1.0.0", "1.0", 0)
+	assert("1.0.0", "1.0.0", 0)
+	assert("1.0", "1.0.0", 0)
+	assert("1", "1.0.0", 0)
+	assert("1.0.0", "1.0.0.1", -1)
+	assert("1.0.0.1.0", "1.0.0.1", 0)
+
+	assert("", "3.4.5", -1)
+}

src/util/util_unix.go

@@ -3,31 +3,71 @@
 package util
 
 import (
+	"fmt"
 	"os"
 	"os/exec"
+	"strings"
 	"syscall"
 
 	"golang.org/x/sys/unix"
 )
 
-// ExecCommand executes the given command with $SHELL
-func ExecCommand(command string, setpgid bool) *exec.Cmd {
-	shell := os.Getenv("SHELL")
-	if len(shell) == 0 {
-		shell = "sh"
-	}
-	return ExecCommandWith(shell, command, setpgid)
+type Executor struct {
+	shell   string
+	args    []string
+	escaper *strings.Replacer
 }
 
-// ExecCommandWith executes the given command with the specified shell
-func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
-	cmd := exec.Command(shell, "-c", command)
+func NewExecutor(withShell string) *Executor {
+	shell := os.Getenv("SHELL")
+	args := strings.Fields(withShell)
+	if len(args) > 0 {
+		shell = args[0]
+		args = args[1:]
+	} else {
+		if len(shell) == 0 {
+			shell = "sh"
+		}
+		args = []string{"-c"}
+	}
+
+	var escaper *strings.Replacer
+	tokens := strings.Split(shell, "/")
+	if tokens[len(tokens)-1] == "fish" {
+		// https://fishshell.com/docs/current/language.html#quotes
+		// > The only meaningful escape sequences in single quotes are \', which
+		// > escapes a single quote and \\, which escapes the backslash symbol.
+		escaper = strings.NewReplacer("\\", "\\\\", "'", "\\'")
+	} else {
+		escaper = strings.NewReplacer("'", "'\\''")
+	}
+	return &Executor{shell, args, escaper}
+}
+
+// ExecCommand executes the given command with $SHELL
+func (x *Executor) ExecCommand(command string, setpgid bool) *exec.Cmd {
+	cmd := exec.Command(x.shell, append(x.args, command)...)
 	if setpgid {
 		cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
 	}
 	return cmd
 }
 
+func (x *Executor) QuoteEntry(entry string) string {
+	return "'" + x.escaper.Replace(entry) + "'"
+}
+
+func (x *Executor) Become(stdin *os.File, environ []string, command string) {
+	shellPath, err := exec.LookPath(x.shell)
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "fzf (become): %s\n", err.Error())
+		os.Exit(127)
+	}
+	args := append([]string{shellPath}, append(x.args, command)...)
+	SetStdin(stdin)
+	syscall.Exec(shellPath, args, environ)
+}
+
 // KillCommand kills the process for the given command
 func KillCommand(cmd *exec.Cmd) error {
 	return syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)

src/util/util_windows.go

@@ -6,62 +6,164 @@ import (
 	"fmt"
 	"os"
 	"os/exec"
+	"path/filepath"
+	"regexp"
 	"strings"
 	"sync/atomic"
 	"syscall"
 )
 
-var shellPath atomic.Value
+type shellType int
+
+const (
+	shellTypeUnknown shellType = iota
+	shellTypeCmd
+	shellTypePowerShell
+)
+
+var escapeRegex = regexp.MustCompile(`[&|<>()^%!"]`)
+
+type Executor struct {
+	shell     string
+	shellType shellType
+	args      []string
+	shellPath atomic.Value
+}
+
+func NewExecutor(withShell string) *Executor {
+	shell := os.Getenv("SHELL")
+	args := strings.Fields(withShell)
+	if len(args) > 0 {
+		shell = args[0]
+	} else if len(shell) == 0 {
+		shell = "cmd"
+	}
+
+	shellType := shellTypeUnknown
+	basename := filepath.Base(shell)
+	if len(args) > 0 {
+		args = args[1:]
+	} else if strings.HasPrefix(basename, "cmd") {
+		shellType = shellTypeCmd
+		args = []string{"/s/c"}
+	} else if strings.HasPrefix(basename, "pwsh") || strings.HasPrefix(basename, "powershell") {
+		shellType = shellTypePowerShell
+		args = []string{"-NoProfile", "-Command"}
+	} else {
+		args = []string{"-c"}
+	}
+	return &Executor{shell: shell, shellType: shellType, args: args}
+}
 
 // ExecCommand executes the given command with $SHELL
-func ExecCommand(command string, setpgid bool) *exec.Cmd {
-	var shell string
-	if cached := shellPath.Load(); cached != nil {
+// FIXME: setpgid is unused. We set it in the Unix implementation so that we
+// can kill preview process with its child processes at once.
+// NOTE: For "powershell", we should ideally set output encoding to UTF8,
+// but it is left as is now because no adverse effect has been observed.
+func (x *Executor) ExecCommand(command string, setpgid bool) *exec.Cmd {
+	shell := x.shell
+	if cached := x.shellPath.Load(); cached != nil {
 		shell = cached.(string)
 	} else {
-		shell = os.Getenv("SHELL")
-		if len(shell) == 0 {
-			shell = "cmd"
-		} else if strings.Contains(shell, "/") {
+		if strings.Contains(shell, "/") {
 			out, err := exec.Command("cygpath", "-w", shell).Output()
 			if err == nil {
 				shell = strings.Trim(string(out), "\n")
 			}
 		}
-		shellPath.Store(shell)
+		x.shellPath.Store(shell)
 	}
-	return ExecCommandWith(shell, command, setpgid)
-}
-
-// ExecCommandWith executes the given command with the specified shell
-// FIXME: setpgid is unused. We set it in the Unix implementation so that we
-// can kill preview process with its child processes at once.
-// NOTE: For "powershell", we should ideally set output encoding to UTF8,
-// but it is left as is now because no adverse effect has been observed.
-func ExecCommandWith(shell string, command string, setpgid bool) *exec.Cmd {
 	var cmd *exec.Cmd
-	if strings.Contains(shell, "cmd") {
+	if x.shellType == shellTypeCmd {
 		cmd = exec.Command(shell)
 		cmd.SysProcAttr = &syscall.SysProcAttr{
 			HideWindow:    false,
-			CmdLine:       fmt.Sprintf(` /v:on/s/c "%s"`, command),
+			CmdLine:       fmt.Sprintf(`%s "%s"`, strings.Join(x.args, " "), command),
 			CreationFlags: 0,
 		}
-		return cmd
-	}
-
-	if strings.Contains(shell, "pwsh") || strings.Contains(shell, "powershell") {
-		cmd = exec.Command(shell, "-NoProfile", "-Command", command)
 	} else {
-		cmd = exec.Command(shell, "-c", command)
-	}
-	cmd.SysProcAttr = &syscall.SysProcAttr{
-		HideWindow:    false,
-		CreationFlags: 0,
+		cmd = exec.Command(shell, append(x.args, command)...)
+		cmd.SysProcAttr = &syscall.SysProcAttr{
+			HideWindow:    false,
+			CreationFlags: 0,
+		}
 	}
 	return cmd
 }
 
+func (x *Executor) Become(stdin *os.File, environ []string, command string) {
+	cmd := x.ExecCommand(command, false)
+	cmd.Stdin = stdin
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+	cmd.Env = environ
+	err := cmd.Start()
+	if err != nil {
+		fmt.Fprintf(os.Stderr, "fzf (become): %s\n", err.Error())
+		os.Exit(127)
+	}
+	err = cmd.Wait()
+	if err != nil {
+		if exitError, ok := err.(*exec.ExitError); ok {
+			os.Exit(exitError.ExitCode())
+		}
+	}
+	os.Exit(0)
+}
+
+func escapeArg(s string) string {
+	b := make([]byte, 0, len(s)+2)
+	b = append(b, '"')
+	slashes := 0
+	for i := 0; i < len(s); i++ {
+		c := s[i]
+		switch c {
+		default:
+			slashes = 0
+		case '\\':
+			slashes++
+		case '"':
+			for ; slashes > 0; slashes-- {
+				b = append(b, '\\')
+			}
+			b = append(b, '\\')
+		}
+		b = append(b, c)
+	}
+	for ; slashes > 0; slashes-- {
+		b = append(b, '\\')
+	}
+	b = append(b, '"')
+	return escapeRegex.ReplaceAllStringFunc(string(b), func(match string) string {
+		return "^" + match
+	})
+}
+
+func (x *Executor) QuoteEntry(entry string) string {
+	switch x.shellType {
+	case shellTypeCmd:
+		/* Manually tested with the following commands:
+		   fzf --preview "echo {}"
+		   fzf --preview "type {}"
+		   echo .git\refs\| fzf --preview "dir {}"
+		   echo .git\refs\\| fzf --preview "dir {}"
+		   echo .git\refs\\\| fzf --preview "dir {}"
+		   reg query HKCU | fzf --reverse --bind "enter:reload(reg query {})"
+		   fzf --disabled --preview "echo {q} {n} {}" --query "&|<>()@^%!"
+		   fd -H --no-ignore -td -d 4 | fzf --preview "dir {}"
+		   fd -H --no-ignore -td -d 4 | fzf --preview "eza {}" --preview-window up
+		   fd -H --no-ignore -td -d 4 | fzf --preview "eza --color=always --tree --level=3 --icons=always {}"
+		   fd -H --no-ignore -td -d 4 | fzf --preview ".\eza.exe --color=always --tree --level=3 --icons=always {}" --with-shell "powershell -NoProfile -Command"
+		*/
+		return escapeArg(entry)
+	case shellTypePowerShell:
+		escaped := strings.ReplaceAll(entry, `"`, `\"`)
+		return "'" + strings.ReplaceAll(escaped, "'", "''") + "'"
+	default:
+		return "'" + strings.ReplaceAll(entry, "'", "'\\''") + "'"
+	}
+}
+
 // KillCommand kills the process for the given command
 func KillCommand(cmd *exec.Cmd) error {
 	return cmd.Process.Kill()

src/winpty.go

@@ -0,0 +1,13 @@
+//go:build !windows
+
+package fzf
+
+import "errors"
+
+func needWinpty(_ *Options) bool {
+	return false
+}
+
+func runWinpty(_ []string, _ *Options) (int, error) {
+	return ExitError, errors.New("Not supported")
+}

src/winpty_windows.go

@@ -0,0 +1,75 @@
+//go:build windows
+
+package fzf
+
+import (
+	"fmt"
+	"os"
+	"os/exec"
+	"strings"
+
+	"github.com/junegunn/fzf/src/util"
+)
+
+func isMintty345() bool {
+	return util.CompareVersions(os.Getenv("TERM_PROGRAM_VERSION"), "3.4.5") >= 0
+}
+
+func needWinpty(opts *Options) bool {
+	if os.Getenv("TERM_PROGRAM") != "mintty" {
+		return false
+	}
+	if isMintty345() {
+		/*
+		 See: https://github.com/junegunn/fzf/issues/3809
+
+		 "MSYS=enable_pcon" allows fzf to run properly on mintty 3.4.5 or later.
+		*/
+		if strings.Contains(os.Getenv("MSYS"), "enable_pcon") {
+			return false
+		}
+
+		// Setting the environment variable here unfortunately doesn't help,
+		// so we need to start a child process with "MSYS=enable_pcon"
+		//   os.Setenv("MSYS", "enable_pcon")
+		return true
+	}
+	if opts.NoWinpty {
+		return false
+	}
+	if _, err := exec.LookPath("winpty"); err != nil {
+		return false
+	}
+	return true
+}
+
+func runWinpty(args []string, opts *Options) (int, error) {
+	sh, err := sh()
+	if err != nil {
+		return ExitError, err
+	}
+
+	argStr := escapeSingleQuote(args[0])
+	for _, arg := range args[1:] {
+		argStr += " " + escapeSingleQuote(arg)
+	}
+	argStr += ` --no-winpty`
+
+	if isMintty345() {
+		return runProxy(argStr, func(temp string) *exec.Cmd {
+			cmd := exec.Command(sh, temp)
+			cmd.Env = append(os.Environ(), "MSYS=enable_pcon")
+			cmd.Stdin = os.Stdin
+			cmd.Stdout = os.Stdout
+			cmd.Stderr = os.Stderr
+			return cmd
+		}, opts, false)
+	}
+
+	return runProxy(argStr, func(temp string) *exec.Cmd {
+		cmd := exec.Command(sh, "-c", fmt.Sprintf(`winpty < /dev/tty > /dev/tty -- sh %q`, temp))
+		cmd.Stdout = os.Stdout
+		cmd.Stderr = os.Stderr
+		return cmd
+	}, opts, false)
+}