Add sxhkd support, closes #186

syntax/sxhkdrc.vim

@@ -0,0 +1,30 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'sxhkd') == -1
+  
+if exists("b:current_syntax")
+    finish
+endif
+
+syntax include @Shell syntax/sh.vim
+
+syn match sxComment "^#.*$"
+syn match sxHotkey "[^ #].*" contains=sxKeysym,sxModifier,sxHotkeySep,sxSequence
+syn match sxCommand "^\s.*$" containedin=ALL contains=@Shell,sxSequenceShell
+syn keyword sxModifier super hyper meta alt control ctrl shift mode_switch lock mod1 mod2 mod3 mod4 mod5 any contained
+syn match sxKeysym "[^ :;{,}+-]\+" contained contains=sxAction
+syn match sxAction "[@~/]" contained
+syn match sxHotkeySep "[;:+]" contained
+syn match sxSequenceSep "[,-]" contained
+syn region sxSequence matchgroup=sxBrace start=/{/ end=/}/ contained keepend oneline contains=sxKeysym,sxModifier,sxHotkeySep,sxSequenceSep
+syn region sxSequenceShell matchgroup=sxBrace start=/{/ end=/}/ contained keepend oneline contains=sxKeysym,sxSequenceSep
+
+hi def link sxComment Comment
+hi def link sxModifier Keyword
+hi def link sxKeysym Identifier
+hi def link sxAction Special
+hi def link sxBrace Special
+hi def link sxHotkeySep Delimiter
+hi def link sxSequenceSep Delimiter
+
+let b:current_syntax = "sxhkdrc"
+
+endif