Add nix support, closes #97

README.md

@@ -64,6 +64,7 @@ Optionally download one of the [releases](https://github.com/sheerun/vim-polyglo
 - [liquid](https://github.com/tpope/vim-liquid) (syntax, indent, ftplugin, ftdetect)
 - [markdown](https://github.com/tpope/vim-markdown) (syntax, ftplugin, ftdetect)
 - [nginx](https://github.com/nginx/nginx) (syntax, indent, ftdetect)
+- [nix](https://github.com/spwhitt/vim-nix) (syntax, ftplugin, ftdetect)
 - [objc](https://github.com/b4winckler/vim-objc) (ftplugin, syntax, indent)
 - [ocaml](https://github.com/jrk/vim-ocaml) (syntax, indent, ftplugin)
 - [octave](https://github.com/vim-scripts/octave.vim--) (syntax)

build

@@ -135,6 +135,7 @@ PACKS="
   liquid:tpope/vim-liquid
   markdown:tpope/vim-markdown
   nginx:nginx/nginx::/contrib/vim/
+  nix:spwhitt/vim-nix
   objc:b4winckler/vim-objc
   ocaml:jrk/vim-ocaml
   octave:vim-scripts/octave.vim--

ftdetect/polyglot.vim

@@ -254,6 +254,10 @@ au BufRead,BufNewFile */etc/nginx/* set ft=nginx
 au BufRead,BufNewFile */usr/local/nginx/conf/* set ft=nginx
 au BufRead,BufNewFile nginx.conf set ft=nginx
 endif
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nix') == -1
+  
+autocmd BufNewFile,BufRead *.nix setfiletype nix
+endif
 if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'opencl') == -1
   
 au! BufRead,BufNewFile *.cl set filetype=opencl

ftplugin/nix.vim

@@ -0,0 +1,17 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nix') == -1
+  
+if exists("b:did_ftplugin")
+    finish
+endif
+let b:did_ftplugin=1
+
+setlocal comments=
+setlocal commentstring=#\ %s
+
+" Nixpkgs indent settings
+setlocal tabstop=2
+setlocal softtabstop=2
+setlocal shiftwidth=2
+setlocal expandtab
+
+endif

syntax/nix.vim

@@ -0,0 +1,131 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'nix') == -1
+  
+"
+" Syntax file for Nix
+"
+" TODO:
+"   Emphasize :
+"   Deemphasize ;
+"   Consistent ()
+"   rec (red?)
+
+if exists("b:current_syntax")
+    finish
+endif
+
+" Operators
+syn match nixOperator "\V++"
+syn match nixOperator "\V+"
+syn match nixOperator "\V!"
+syn match nixOperator "\V=="
+syn match nixOperator "\V!="
+syn match nixOperator "\V&&"
+syn match nixOperator "\V||"
+syn match nixOperator "\V->"
+
+syn match nixOperator "\V-"
+syn match nixOperator "\V*"
+syn match nixOperator "\V/"
+syn match nixOperator "\V>"
+syn match nixOperator "\V<"
+
+" Keywords
+syn keyword nixKeyword let in or assert inherit null with rec
+syn keyword nixConditional if else then
+syn keyword nixBoolean true false
+
+" Builtins
+syn keyword nixBuiltin builtins abort add attrNames attrValues
+            \ baseNameOf compareVersions concatLists currentSystem deepSeq
+            \ derivation dirOf div elem elemAt filter filterSource fromJSON
+            \ getAttr getEnv hasAttr hashString head import intersectAttrs
+            \ isAttrs isList isFunction isString isInt isBool isNull length
+            \ lessThan listToAttrs map mul parseDrvNames pathExists readDir
+            \ readFile removeAttrs seq stringLength sub substring tail throw
+            \ toFile toJSON toPath toString toXML trace typeOf tryEval
+
+syn match nixpkgs "<nixpkgs>"
+syn match nixSpecialOper "\V@\|;\|,\|?\|..."
+
+" Attribute Lists
+"syn match nixBrace "\v[(){}\[\]]|rec\s*\{"
+syn region nixSet matchgroup=nixBraces start="{" end="}" contains=ALL
+syn region nixRecSet matchgroup=nixBraces start="rec\s*{" end="}" contains=ALL
+syn region nixList matchgroup=nixBraces start="\[" end="\]" contains=ALLBUT,nixAttr
+syn match nixAttr "\v[0-9A-Za-z\-\_]+\ze\s*\=" contained
+
+syn match nixInteger "\v<\d+>"
+
+" Functions
+syn match nixFuncArg "\v\zs\w+\ze\s*:"
+
+" TODO: Exclude ; and other illegal characters
+syn match nixPath "\v\S*/\S+|\S+/\S*"
+
+" This operator is placed after nixPath to override nixPath's highlighting
+syn match nixOperator "\V//"
+
+" Strings
+syn match nixStringIndentedEscapes +'''\|''\${\|''\\n\|''\\r\|''\\t+
+syn match nixStringEscapes +\\"\|\\\${\|\\n\|\\r\|\\t\|\\\\+
+syn region nixStringIndented
+            \ start=+''+
+            \ skip=+'''+
+            \ end=+''+
+            \ contains=nixAntiquotation,nixStringIndentedEscapes
+syn region nixString
+            \ start=+"+
+            \ skip=+\\"+
+            \ end=+"+
+            \ contains=nixAntiquotation,nixStringEscapes
+
+" If this contains nixBrace, it ignores its own closing brace and syntax gets
+" thrown way off contains=ALLBUT,nixBrace
+syn region nixAntiquotation start=+\${+ end=+}+ contains=nixAntiQuotation
+
+" Comments
+syn region nixMultiLineComment start=+/\*+ skip=+\\"+ end=+\*/+ contains=nixTodos
+syn match  nixEndOfLineComment "#.*$" contains=nixTodos
+syntax keyword nixTodos TODO XXX FIXME NOTE TODOS contained
+
+" Special (Delimiter
+hi def link nixBraces                Delimiter
+hi def link nixpkgs                  Special
+hi def link nixSpecialOper           Special
+hi def link nixStringIndentedEscapes SpecialChar
+hi def link nixStringEscapes         SpecialChar
+hi def link nixBuiltin               Special
+hi def link nixOperator              Operator
+
+" Constants
+hi def link nixBoolean          Boolean
+hi def link nixInteger          Number
+hi def link nixString           String
+hi def link nixStringIndented   String
+
+" Comments
+hi def link nixMultiLineComment Comment
+hi def link nixEndOfLineComment Comment
+
+" Identifiers
+hi def link nixConditional      Conditional
+hi def link nixKeyword          Keyword
+hi def link nixOperator         Operator
+hi def link nixException        Exception
+hi def link nixAttr             Identifier
+hi def link nixFuncArg          Identifier
+
+" PreProc
+hi def link nixAntiquotation      Macro
+
+" Underlined (html links)
+hi def link nixPath             Underlined
+
+" Error
+
+syn sync maxlines=20000
+syn sync minlines=50000
+
+let b:current_syntax = 'nix'
+
+endif