" Line continuation is used here, remove 'C' from 'cpoptions'
let s:cpo_save = &cpo
set cpo&vim
func! polyglot#Heuristics()
" Try to detect filetype from shebang
let l:filetype = polyglot#Shebang()
if l:filetype != ""
exec "setf " . l:filetype
return
endif
endfunc
let s:interpreters = {
\ 'osascript': 'applescript',
\ 'tcc': 'c',
\ 'coffee': 'coffee',
\ 'crystal': 'crystal',
\ 'dart': 'dart',
\ 'elixir': 'elixir',
\ 'escript': 'erlang',
\ 'fish': 'fish',
\ 'gnuplot': 'gnuplot',
\ 'runhaskell': 'haskell',
\ 'chakra': 'javascript',
\ 'd8': 'javascript',
\ 'gjs': 'javascript',
\ 'js': 'javascript',
\ 'node': 'javascript',
\ 'nodejs': 'javascript',
\ 'qjs': 'javascript',
\ 'rhino': 'javascript',
\ 'v8': 'javascript',
\ 'v8-shell': 'javascript',
\ 'julia': 'julia',
\ 'lua': 'lua',
\ 'moon': 'moon',
\ 'ocaml': 'ocaml',
\ 'ocamlrun': 'ocaml',
\ 'ocamlscript': 'ocaml',
\ 'cperl': 'perl',
\ 'perl': 'perl',
\ 'php': 'php',
\ 'pwsh': 'ps1',
\ 'python': 'python',
\ 'python2': 'python',
\ 'python3': 'python',
\ 'qmake': 'qmake',
\ 'Rscript': 'r',
\ 'racket': 'racket',
\ 'perl6': 'raku',
\ 'raku': 'raku',
\ 'rakudo': 'raku',
\ 'ruby': 'ruby',
\ 'macruby': 'ruby',
\ 'rake': 'ruby',
\ 'jruby': 'ruby',
\ 'rbx': 'ruby',
\ 'scala': 'scala',
\ 'ash': 'sh',
\ 'bash': 'sh',
\ 'dash': 'sh',
\ 'ksh': 'sh',
\ 'mksh': 'sh',
\ 'pdksh': 'sh',
\ 'rc': 'sh',
\ 'sh': 'sh',
\ 'zsh': 'sh',
\ 'boolector': 'smt2',
\ 'cvc4': 'smt2',
\ 'mathsat5': 'smt2',
\ 'opensmt': 'smt2',
\ 'smtinterpol': 'smt2',
\ 'smt-rat': 'smt2',
\ 'stp': 'smt2',
\ 'verit': 'smt2',
\ 'yices2': 'smt2',
\ 'z3': 'smt2',
\ 'deno': 'typescript',
\ 'ts-node': 'typescript',
\ }
let s:r_hashbang = '^#!\s*\(\S\+\)\s*\(.*\)\s*'
let s:r_envflag = '%(\S\+=\S\+\|-[iS]\|--ignore-environment\|--split-string\)'
let s:r_env = '^\%(\' . s:r_envflag . '\s\+\)*\(\S\+\)'
func! polyglot#Shebang()
let l:line1 = getline(1)
if l:line1 !~# "^#!"
return
endif
let l:pathrest = matchlist(l:line1, s:r_hashbang)
if len(l:pathrest) == 0
return
endif
let [_, l:path, l:rest; __] = l:pathrest
let l:script = split(l:path, "/")[-1]
if l:script == "env"
let l:argspath = matchlist(l:rest, s:r_env)
if len(l:argspath) == 0
return
endif
let l:script = l:argspath[1]
endif
if has_key(s:interpreters, l:script)
return s:interpreters[l:script]
endif
for interpreter in keys(s:interpreters)
if l:script =~# '^' . interpreter
return s:interpreters[interpreter]
endif
endfor
endfunc
func! polyglot#DetectInpFiletype()
let line = getline(1)
if line =~# '^\*'
setf abaqus | return
endif
for lnum in range(1, min([line("$"), 500]))
let line = getline(lnum)
if line =~? '^header surface data'
setf trasys | return
endif
endfor
endfunc
func! polyglot#DetectAsaFiletype()
if exists("g:filetype_asa")
exe "setf " . g:filetype_asa | return
endif
setf aspvbs | return
endfunc
func! polyglot#DetectAspFiletype()
if exists("g:filetype_asp")
exe "setf " . g:filetype_asp | return
endif
for lnum in range(1, min([line("$"), 3]))
let line = getline(lnum)
if line =~? 'perlscript'
setf aspperl | return
endif
endfor
setf aspvbs | return
endfunc
func! polyglot#DetectMFiletype()
let saw_comment = 0
for lnum in range(1, min([line("$"), 100]))
let line = getline(lnum)
if line =~# '^\s*/\*'
let saw_comment = 1
endif
if line =~# '^\s*\(@\(interface\|class\|protocol\|property\|end\|synchronised\|selector\|implementation\)\(\<\|\>\)\|#import\s\+.\+\.h[">]\)'
setf objc | return
endif
if line =~# '^\s*%'
setf octave | return
endif
if line =~# '^\s*(\*'
setf mma | return
endif
if line =~? '^\s*\(\(type\|var\)\(\<\|\>\)\|--\)'
setf murphi | return
endif
endfor
if saw_comment
setf objc | return
endif
if exists("g:filetype_m")
exe "setf " . g:filetype_m | return
endif
setf octave | return
endfunc
func! polyglot#DetectFsFiletype()
for lnum in range(1, min([line("$"), 50]))
let line = getline(lnum)
if line =~# '^\(: \|new-device\)'
setf forth | return
endif
if line =~# '^\s*\(#light\|import\|let\|module\|namespace\|open\|type\)'
setf fsharp | return
endif
if line =~# '\s*\(#version\|precision\|uniform\|varying\|vec[234]\)'
setf glsl | return
endif
endfor
if exists("g:filetype_fs")
exe "setf " . g:filetype_fs | return
endif
setf forth | return
endfunc
func! polyglot#DetectReFiletype()
for lnum in range(1, min([line("$"), 50]))
let line = getline(lnum)
if line =~# '^\s*#\%(\%(if\|ifdef\|define\|pragma\)\s\+\w\|\s*include\s\+[<"]\|template\s*<\)'
setf cpp | return
endif
setf reason | return
endfor
endfunc
" Restore 'cpoptions'
let &cpo = s:cpo_save
unlet s:cpo_save
