feat: Allow disabling Ctrl-R binding in shell integration (#4535)

Close #4417

CHANGELOG.md

@@ -27,6 +27,7 @@ This version introduces many new features centered around the new "raw" mode.
 | Enhancement | Key     | `CTRL-N`            | `down` -> `down-match`                             |
 | Enhancement | Key     | `CTRL-P`            | `up` -> `up-match`                                 |
 | Enhancement | Shell   | `CTRL-R` binding    | Toggle raw mode with `ALT-R`                       |
+| Enhancement | Shell   | `CTRL-R` binding    | Opt-out with an empty `FZF_CTRL_R_COMMAND`         |
 
 ### Introducing "raw" mode
 
@@ -231,6 +232,17 @@ As described above, `$FZF_RAW` is now exported to child processes in raw mode,
 indicating whether the current item is a match (`1`) or not (`0`). It is not
 defined when not in raw mode.
 
+#### `$FZF_CTRL_R_COMMAND`
+
+You can opt-out `CTRL-R` binding from the shell integration by setting
+`FZF_CTRL_R_COMMAND` to an empty string. Setting it to any other value is not
+supported and will result in a warning.
+
+```sh
+# Disable the CTRL-R binding from the shell integration
+FZF_CTRL_R_COMMAND= eval "$(fzf --bash)"
+```
+
 ### Added key support for `--bind`
 
 Pull request #3996 added support for many additional keys for `--bind` option,

README.md

@@ -218,13 +218,13 @@ Add the following line to your shell configuration file.
 > (e.g. `apt show fzf`)
 
 > [!TIP]
-> You can disable CTRL-T or ALT-C binding by setting `FZF_CTRL_T_COMMAND` or
-> `FZF_ALT_C_COMMAND` to an empty string when sourcing the script.
-> For example, to disable ALT-C binding:
+> You can disable CTRL-T, CTRL-R, or ALT-C bindings by setting the
+> corresponding `*_COMMAND` variable to an empty string when sourcing the
+> script. For example, to disable CTRL-R and ALT-C:
 >
-> * bash: `FZF_ALT_C_COMMAND= eval "$(fzf --bash)"`
-> * zsh: `FZF_ALT_C_COMMAND= source <(fzf --zsh)`
-> * fish: `fzf --fish | FZF_ALT_C_COMMAND= source`
+> * bash: `FZF_CTRL_R_COMMAND= FZF_ALT_C_COMMAND= eval "$(fzf --bash)"`
+> * zsh: `FZF_CTRL_R_COMMAND= FZF_ALT_C_COMMAND= source <(fzf --zsh)`
+> * fish: `fzf --fish | FZF_CTRL_R_COMMAND= FZF_ALT_C_COMMAND= source`
 >
 > Setting the variables after sourcing the script will have no effect.
 
@@ -534,6 +534,9 @@ the following key bindings in bash, zsh, and fish.
         --color header:italic
         --header 'Press CTRL-Y to copy command into clipboard'"
       ```
+    - Can be disabled by setting `FZF_CTRL_R_COMMAND` to an empty string when
+      sourcing the script
+    - Custom override via a non-empty `FZF_CTRL_R_COMMAND` is not yet supported and will emit a warning
 - `ALT-C` - cd into the selected directory
     - The list is generated using `--walker dir,follow,hidden` option
     - Set `FZF_ALT_C_COMMAND` to override the default command

shell/key-bindings.bash

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -132,9 +133,14 @@ if ((BASH_VERSINFO[0] < 4)); then
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
+  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    fi
     bind -m emacs-standard '"\C-r": "\C-e \C-u\C-y\ey\C-u`__fzf_history__`\e\C-e\er"'
     bind -m vi-command '"\C-r": "\C-z\C-r\C-z"'
     bind -m vi-insert '"\C-r": "\C-z\C-r\C-z"'
+  fi
 else
   # CTRL-T - Paste the selected file path into the command line
   if [[ ${FZF_CTRL_T_COMMAND-x} != "" ]]; then
@@ -144,9 +150,14 @@ else
   fi
 
   # CTRL-R - Paste the selected command from history into the command line
+  if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+    if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    fi
     bind -m emacs-standard -x '"\C-r": __fzf_history__'
     bind -m vi-command -x '"\C-r": __fzf_history__'
     bind -m vi-insert -x '"\C-r": __fzf_history__'
+  fi
 fi
 
 # ALT-C - cd into the selected directory

shell/key-bindings.fish

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -214,8 +215,13 @@ function fzf_key_bindings
     commandline -f repaint
   end
 
+  if not set -q FZF_CTRL_R_COMMAND; or test -n "$FZF_CTRL_R_COMMAND"
+    if test -n "$FZF_CTRL_R_COMMAND"
+      echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+    end
     bind \cr fzf-history-widget
     bind -M insert \cr fzf-history-widget
+  end
 
   if not set -q FZF_CTRL_T_COMMAND; or test -n "$FZF_CTRL_T_COMMAND"
     bind \ct fzf-file-widget

shell/key-bindings.zsh

@@ -7,6 +7,7 @@
 # - $FZF_TMUX_OPTS
 # - $FZF_CTRL_T_COMMAND
 # - $FZF_CTRL_T_OPTS
+# - $FZF_CTRL_R_COMMAND
 # - $FZF_CTRL_R_OPTS
 # - $FZF_ALT_C_COMMAND
 # - $FZF_ALT_C_OPTS
@@ -150,10 +151,15 @@ fzf-history-widget() {
   zle reset-prompt
   return $ret
 }
-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
+if [[ ${FZF_CTRL_R_COMMAND-x} != "" ]]; then
+  if [[ -n ${FZF_CTRL_R_COMMAND-} ]]; then
+    echo "warning: FZF_CTRL_R_COMMAND is set to a custom command, but custom commands are not yet supported for CTRL-R" >&2
+  fi
+  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
 fi
 
 } always {