neovim/runtime/syntax/tmux.vim

" Language: tmux(1) configuration file
" Version: 3.2a (git-44ada9cd)
" URL: https://github.com/ericpruitt/tmux.vim/
" Maintainer: Eric Pruitt <eric.pruitt@gmail.com>
" License: 2-Clause BSD (http://opensource.org/licenses/BSD-2-Clause)

if exists("b:current_syntax")
    finish
endif

" Explicitly change compatibility options to Vim's defaults because this file
" uses line continuations.
let s:original_cpo = &cpo
set cpo&vim

let b:current_syntax = "tmux"
syntax iskeyword @,48-57,_,192-255,-
syntax case match

syn keyword tmuxAction  none any current other
syn keyword tmuxBoolean off on

syn keyword tmuxTodo FIXME NOTE TODO XXX contained

syn match tmuxColour            /\<colour[0-9]\+/      display
syn match tmuxKey               /\(C-\|M-\|\^\)\+\S\+/ display
syn match tmuxNumber            /\<\d\+\>/             display
syn match tmuxFlags             /\s-\a\+/              display
syn match tmuxVariable          /\w\+=/                display
syn match tmuxVariableExpansion /\${\=\w\+}\=/         display
syn match tmuxControl           /%\(if\|elif\|else\|endif\)/

syn region tmuxComment start=/#/ skip=/\\\@<!\\$/ end=/$/ contains=tmuxTodo,@Spell

syn region tmuxString start=+"+ skip=+\\\\\|\\"\|\\$+ excludenl end=+"+ end='$' contains=tmuxFormatString,@Spell
syn region tmuxString start=+'+ skip=+\\\\\|\\'\|\\$+ excludenl end=+'+ end='$' contains=tmuxFormatString,@Spell

" TODO: Figure out how escaping works inside of #(...) and #{...} blocks.
syn region tmuxFormatString start=/#[#DFhHIPSTW]/ end=// contained keepend
syn region tmuxFormatString start=/#{/ skip=/#{.\{-}}/ end=/}/ keepend
syn region tmuxFormatString start=/#(/ skip=/#(.\{-})/ end=/)/ contained keepend

hi def link tmuxFormatString      Identifier
hi def link tmuxAction            Boolean
hi def link tmuxBoolean           Boolean
hi def link tmuxCommands          Keyword
hi def link tmuxControl           Keyword
hi def link tmuxComment           Comment
hi def link tmuxKey               Special
hi def link tmuxNumber            Number
hi def link tmuxFlags             Identifier
hi def link tmuxOptions           Function
hi def link tmuxString            String
hi def link tmuxTodo              Todo
hi def link tmuxVariable          Identifier
hi def link tmuxVariableExpansion Identifier

" Make the foreground of colourXXX keywords match the color they represent
" when g:tmux_syntax_colors is unset or set to a non-zero value.
" Darker colors have their background set to white.
if get(g:, "tmux_syntax_colors", 1)
    for s:i in range(0, 255)
        let s:bg = (!s:i || s:i == 16 || (s:i > 231 && s:i < 235)) ? 15 : "none"
        exec "syn match tmuxColour" . s:i . " /\\<colour" . s:i . "\\>/ display"
\         " | highlight tmuxColour" . s:i . " ctermfg=" . s:i . " ctermbg=" . s:bg
    endfor
endif

syn keyword tmuxOptions
\ backspace buffer-limit command-alias copy-command default-terminal editor
\ escape-time exit-empty activity-action assume-paste-time base-index
\ bell-action default-command default-shell default-size destroy-unattached
\ detach-on-destroy display-panes-active-colour display-panes-colour
\ display-panes-time display-time exit-unattached extended-keys focus-events
\ history-file history-limit key-table lock-after-time lock-command
\ message-command-style message-limit message-style aggressive-resize
\ allow-rename alternate-screen automatic-rename automatic-rename-format
\ clock-mode-colour clock-mode-style copy-mode-current-match-style
\ copy-mode-mark-style copy-mode-match-style main-pane-height
\ main-pane-width mode-keys mode-style monitor-activity monitor-bell
\ monitor-silence mouse other-pane-height other-pane-width
\ pane-active-border-style pane-base-index pane-border-format
\ pane-border-lines pane-border-status pane-border-style pane-colours prefix
\ prefix2 prompt-history-limit remain-on-exit renumber-windows repeat-time
\ set-clipboard set-titles set-titles-string silence-action status status-bg
\ status-fg status-format status-interval status-justify status-keys
\ status-left status-left-length status-left-style status-position
\ status-right status-right-length status-right-style status-style
\ synchronize-panes terminal-features terminal-overrides update-environment
\ user-keys visual-activity visual-bell visual-silence window-active-style
\ window-size window-status-activity-style window-status-bell-style
\ window-status-current-format window-status-current-style
\ window-status-format window-status-last-style window-status-separator
\ window-status-style window-style word-separators wrap-search

syn keyword tmuxCommands
\ attach attach-session bind bind-key break-pane breakp capture-pane
\ capturep choose-buffer choose-client choose-tree clear-history clearhist
\ clock-mode command-prompt confirm confirm-before copy-mode customize-mode
\ detach detach-client display display-menu display-message display-panes
\ display-popup displayp find-window findw if if-shell join-pane joinp
\ kill-pane kill-server kill-session kill-window killp has has-session killw
\ link-window linkw list-buffers list-clients list-commands list-keys
\ list-panes list-sessions list-windows load-buffer loadb lock lock-client
\ lock-server lock-session lockc last-pane lastp locks ls last last-window
\ lsb delete-buffer deleteb lsc lscm lsk lsp lsw menu move-pane move-window
\ clear-prompt-history clearphist movep movew new new-session new-window
\ neww next next-layout next-window nextl paste-buffer pasteb pipe-pane
\ pipep popup prev previous-layout previous-window prevl refresh
\ refresh-client rename rename-session rename-window renamew resize-pane
\ resize-window resizep resizew respawn-pane respawn-window respawnp
\ respawnw rotate-window rotatew run run-shell save-buffer saveb
\ select-layout select-pane select-window selectl selectp selectw send
\ send-keys send-prefix set set-buffer set-environment set-hook set-option
\ set-window-option setb setenv setw show show-buffer show-environment
\ show-hooks show-messages show-options show-prompt-history
\ show-window-options showb showenv showmsgs showphist showw source
\ source-file split-window splitw start start-server suspend-client suspendc
\ swap-pane swap-window swapp swapw switch-client switchc unbind unbind-key
\ unlink-window unlinkw wait wait-for

let &cpo = s:original_cpo
unlet! s:original_cpo s:bg s:i