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ft.vim
" Vim functions for file type detection " " Maintainer: Bram Moolenaar <Bram@vim.org> " Last Change: 2021 Dec 17 " These functions are moved here from runtime/filetype.vim to make startup " faster. " Line continuation is used here, remove 'C' from 'cpoptions' let s:cpo_save = &cpo set cpo&vim func dist#ft#Check_inp() if getline(1) =~ '^\*' setf abaqus else let n = 1 if line("$") > 500 let nmax = 500 else let nmax = line("$") endif while n <= nmax if getline(n) =~? "^header surface data" setf trasys break endif let n = n + 1 endwhile endif endfunc " This function checks for the kind of assembly that is wanted by the user, or " can be detected from the first five lines of the file. func dist#ft#FTasm() " make sure b:asmsyntax exists if !exists("b:asmsyntax") let b:asmsyntax = "" endif if b:asmsyntax == "" call dist#ft#FTasmsyntax() endif " if b:asmsyntax still isn't set, default to asmsyntax or GNU if b:asmsyntax == "" if exists("g:asmsyntax") let b:asmsyntax = g:asmsyntax else let b:asmsyntax = "asm" endif endif exe "setf " . fnameescape(b:asmsyntax) endfunc func dist#ft#FTasmsyntax() " see if file contains any asmsyntax=foo overrides. If so, change " b:asmsyntax appropriately let head = " ".getline(1)." ".getline(2)." ".getline(3)." ".getline(4). \" ".getline(5)." " let match = matchstr(head, '\sasmsyntax=\zs[a-zA-Z0-9]\+\ze\s') if match != '' let b:asmsyntax = match elseif ((head =~? '\.title') || (head =~? '\.ident') || (head =~? '\.macro') || (head =~? '\.subtitle') || (head =~? '\.library')) let b:asmsyntax = "vmasm" endif endfunc " Check if one of the first five lines contains "VB_Name". In that case it is " probably a Visual Basic file. Otherwise it's assumed to be "alt" filetype. func dist#ft#FTVB(alt) if getline(1).getline(2).getline(3).getline(4).getline(5) =~? 'VB_Name\|Begin VB\.\(Form\|MDIForm\|UserControl\)' setf vb else exe "setf " . a:alt endif endfunc func dist#ft#FTbtm() if exists("g:dosbatch_syntax_for_btm") && g:dosbatch_syntax_for_btm setf dosbatch else setf btm endif endfunc func dist#ft#BindzoneCheck(default) if getline(1).getline(2).getline(3).getline(4) =~ '^; <<>> DiG [0-9.]\+.* <<>>\|$ORIGIN\|$TTL\|IN\s\+SOA' setf bindzone elseif a:default != '' exe 'setf ' . a:default endif endfunc func dist#ft#FTlpc() if exists("g:lpc_syntax_for_c") let lnum = 1 while lnum <= 12 if getline(lnum) =~# '^\(//\|inherit\|private\|protected\|nosave\|string\|object\|mapping\|mixed\)' setf lpc return endif let lnum = lnum + 1 endwhile endif setf c endfunc func dist#ft#FTheader() if match(getline(1, min([line("$"), 200])), '^@\(interface\|end\|class\)') > -1 if exists("g:c_syntax_for_h") setf objc else setf objcpp endif elseif exists("g:c_syntax_for_h") setf c elseif exists("g:ch_syntax_for_h") setf ch else setf cpp endif endfunc " This function checks if one of the first ten lines start with a '@'. In " that case it is probably a change file. " If the first line starts with # or ! it's probably a ch file. " If a line has "main", "include", "//" or "/*" it's probably ch. " Otherwise CHILL is assumed. func dist#ft#FTchange() let lnum = 1 while lnum <= 10 if getline(lnum)[0] == '@' setf change return endif if lnum == 1 && (getline(1)[0] == '#' || getline(1)[0] == '!') setf ch return endif if getline(lnum) =~ "MODULE" setf chill return endif if getline(lnum) =~ 'main\s*(\|#\s*include\|//' setf ch return endif let lnum = lnum + 1 endwhile setf chill endfunc func dist#ft#FTent() " This function checks for valid cl syntax in the first five lines. " Look for either an opening comment, '#', or a block start, '{". " If not found, assume SGML. let lnum = 1 while lnum < 6 let line = getline(lnum) if line =~ '^\s*[#{]' setf cl return elseif line !~ '^\s*$' " Not a blank line, not a comment, and not a block start, " so doesn't look like valid cl code. break endif let lnum = lnum + 1 endw setf dtd endfunc func dist#ft#ExCheck() let lines = getline(1, min([line("$"), 100])) if exists('g:filetype_euphoria') exe 'setf ' . g:filetype_euphoria elseif match(lines, '^--\|^ifdef\>\|^include\>') > -1 setf euphoria3 else setf elixir endif endfunc func dist#ft#EuphoriaCheck() if exists('g:filetype_euphoria') exe 'setf ' . g:filetype_euphoria else setf euphoria3 endif endfunc func dist#ft#DtraceCheck() let lines = getline(1, min([line("$"), 100])) if match(lines, '^module\>\|^import\>') > -1 " D files often start with a module and/or import statement. setf d elseif match(lines, '^#!\S\+dtrace\|#pragma\s\+D\s\+option\|:\S\{-}:\S\{-}:') > -1 setf dtrace else setf d endif endfunc func dist#ft#FTe() if exists('g:filetype_euphoria') exe 'setf ' . g:filetype_euphoria else let n = 1 while n < 100 && n <= line("$") if getline(n) =~ "^\\s*\\(<'\\|'>\\)\\s*$" setf specman return endif let n = n + 1 endwhile setf eiffel endif endfunc " Distinguish between Forth and F#. " Provided by Doug Kearns. func dist#ft#FTfs() if exists("g:filetype_fs") exe "setf " . g:filetype_fs else let line = getline(nextnonblank(1)) " comments and colon definitions if line =~ '^\s*\.\=( ' || line =~ '^\s*\\G\= ' || line =~ '^\\$' \ || line =~ '^\s*: \S' setf forth else setf fsharp endif endif endfunc " Distinguish between HTML, XHTML and Django func dist#ft#FThtml() let n = 1 while n < 10 && n <= line("$") if getline(n) =~ '\<DTD\s\+XHTML\s' setf xhtml return endif if getline(n) =~ '{%\s*\(extends\|block\|load\)\>\|{#\s\+' setf htmldjango return endif let n = n + 1 endwhile setf FALLBACK html endfunc " Distinguish between standard IDL and MS-IDL func dist#ft#FTidl() let n = 1 while n < 50 && n <= line("$") if getline(n) =~ '^\s*import\s\+"\(unknwn\|objidl\)\.idl"' setf msidl return endif let n = n + 1 endwhile setf idl endfunc " Distinguish between "default" and Cproto prototype file. */ func dist#ft#ProtoCheck(default) " Cproto files have a comment in the first line and a function prototype in " the second line, it always ends in ";". Indent files may also have " comments, thus we can't match comments to see the difference. " IDL files can have a single ';' in the second line, require at least one " chacter before the ';'. if getline(2) =~ '.;$' setf cpp else exe 'setf ' . a:default endif endfunc func dist#ft#FTm() if exists("g:filetype_m") exe "setf " . g:filetype_m return endif " excluding end(for|function|if|switch|while) common to Murphi let octave_block_terminators = '\<end\%(_try_catch\|classdef\|enumeration\|events\|methods\|parfor\|properties\)\>' let objc_preprocessor = '^\s*#\s*\%(import\|include\|define\|if\|ifn\=def\|undef\|line\|error\|pragma\)\>' let n = 1 let saw_comment = 0 " Whether we've seen a multiline comment leader. while n < 100 let line = getline(n) if line =~ '^\s*/\*' " /* ... */ is a comment in Objective C and Murphi, so we can't conclude " it's either of them yet, but track this as a hint in case we don't see " anything more definitive. let saw_comment = 1 endif if line =~ '^\s*//' || line =~ '^\s*@import\>' || line =~ objc_preprocessor setf objc return endif if line =~ '^\s*\%(#\|%!\)' || line =~ '^\s*unwind_protect\>' || \ line =~ '\%(^\|;\)\s*' .. octave_block_terminators setf octave return endif " TODO: could be Matlab or Octave if line =~ '^\s*%' setf matlab return endif if line =~ '^\s*(\*' setf mma return endif if line =~ '^\c\s*\(\(type\|var\)\>\|--\)' setf murphi return endif let n = n + 1 endwhile if saw_comment " We didn't see anything definitive, but this looks like either Objective C " or Murphi based on the comment leader. Assume the former as it is more " common. setf objc else " Default is Matlab setf matlab endif endfunc func dist#ft#FTmms() let n = 1 while n < 20 let line = getline(n) if line =~ '^\s*\(%\|//\)' || line =~ '^\*' setf mmix return endif if line =~ '^\s*#' setf make return endif let n = n + 1 endwhile setf mmix endfunc " This function checks if one of the first five lines start with a dot. In " that case it is probably an nroff file: 'filetype' is set and 1 is returned. func dist#ft#FTnroff() if getline(1)[0] . getline(2)[0] . getline(3)[0] . getline(4)[0] . getline(5)[0] =~ '\.' setf nroff return 1 endif return 0 endfunc func dist#ft#FTmm() let n = 1 while n < 20 let line = getline(n) if line =~ '^\s*\(#\s*\(include\|import\)\>\|@import\>\|/\*\)' setf objcpp return endif let n = n + 1 endwhile setf nroff endfunc func dist#ft#FTpl() if exists("g:filetype_pl") exe "setf " . g:filetype_pl else " recognize Prolog by specific text in the first non-empty line " require a blank after the '%' because Perl uses "%list" and "%translate" let l = getline(nextnonblank(1)) if l =~ '\<prolog\>' || l =~ '^\s*\(%\+\(\s\|$\)\|/\*\)' || l =~ ':-' setf prolog else setf perl endif endif endfunc func dist#ft#FTinc() if exists("g:filetype_inc") exe "setf " . g:filetype_inc else let lines = getline(1).getline(2).getline(3) if lines =~? "perlscript" setf aspperl elseif lines =~ "<%" setf aspvbs elseif lines =~ "<?" setf php " Pascal supports // comments but they're vary rarely used for file " headers so assume POV-Ray elseif lines =~ '^\s*\%({\|(\*\)' || lines =~? s:ft_pascal_keywords setf pascal else call dist#ft#FTasmsyntax() if exists("b:asmsyntax") exe "setf " . fnameescape(b:asmsyntax) else setf pov endif endif endif endfunc func dist#ft#FTprogress_cweb() if exists("g:filetype_w") exe "setf " . g:filetype_w return endif if getline(1) =~ '&ANALYZE' || getline(3) =~ '&GLOBAL-DEFINE' setf progress else setf cweb endif endfunc func dist#ft#FTprogress_asm() if exists("g:filetype_i") exe "setf " . g:filetype_i return endif " This function checks for an assembly comment the first ten lines. " If not found, assume Progress. let lnum = 1 while lnum <= 10 && lnum < line('$') let line = getline(lnum) if line =~ '^\s*;' || line =~ '^\*' call dist#ft#FTasm() return elseif line !~ '^\s*$' || line =~ '^/\*' " Not an empty line: Doesn't look like valid assembly code. " Or it looks like a Progress /* comment break endif let lnum = lnum + 1 endw setf progress endfunc let s:ft_pascal_comments = '^\s*\%({\|(\*\|//\)' let s:ft_pascal_keywords = '^\s*\%(program\|unit\|library\|uses\|begin\|procedure\|function\|const\|type\|var\)\>' func dist#ft#FTprogress_pascal() if exists("g:filetype_p") exe "setf " . g:filetype_p return endif " This function checks for valid Pascal syntax in the first ten lines. " Look for either an opening comment or a program start. " If not found, assume Progress. let lnum = 1 while lnum <= 10 && lnum < line('$') let line = getline(lnum) if line =~ s:ft_pascal_comments || line =~? s:ft_pascal_keywords setf pascal return elseif line !~ '^\s*$' || line =~ '^/\*' " Not an empty line: Doesn't look like valid Pascal code. " Or it looks like a Progress /* comment break endif let lnum = lnum + 1 endw setf progress endfunc func dist#ft#FTpp() if exists("g:filetype_pp") exe "setf " . g:filetype_pp else let line = getline(nextnonblank(1)) if line =~ s:ft_pascal_comments || line =~? s:ft_pascal_keywords setf pascal else setf puppet endif endif endfunc func dist#ft#FTr() let max = line("$") > 50 ? 50 : line("$") for n in range(1, max) " Rebol is easy to recognize, check for that first if getline(n) =~? '\<REBOL\>' setf rebol return endif endfor for n in range(1, max) " R has # comments if getline(n) =~ '^\s*#' setf r return endif " Rexx has /* comments */ if getline(n) =~ '^\s*/\*' setf rexx return endif endfor " Nothing recognized, use user default or assume Rexx if exists("g:filetype_r") exe "setf " . g:filetype_r else " Rexx used to be the default, but R appears to be much more popular. setf r endif endfunc func dist#ft#McSetf() " Rely on the file to start with a comment. " MS message text files use ';', Sendmail files use '#' or 'dnl' for lnum in range(1, min([line("$"), 20])) let line = getline(lnum) if line =~ '^\s*\(#\|dnl\)' setf m4 " Sendmail .mc file return elseif line =~ '^\s*;' setf msmessages " MS Message text file return endif endfor setf m4 " Default: Sendmail .mc file endfunc " Called from filetype.vim and scripts.vim. func dist#ft#SetFileTypeSH(name) if did_filetype() " Filetype was already detected return endif if expand("<amatch>") =~ g:ft_ignore_pat return endif if a:name =~ '\<csh\>' " Some .sh scripts contain #!/bin/csh. call dist#ft#SetFileTypeShell("csh") return elseif a:name =~ '\<tcsh\>' " Some .sh scripts contain #!/bin/tcsh. call dist#ft#SetFileTypeShell("tcsh") return elseif a:name =~ '\<zsh\>' " Some .sh scripts contain #!/bin/zsh. call dist#ft#SetFileTypeShell("zsh") return elseif a:name =~ '\<ksh\>' let b:is_kornshell = 1 if exists("b:is_bash") unlet b:is_bash endif if exists("b:is_sh") unlet b:is_sh endif elseif exists("g:bash_is_sh") || a:name =~ '\<bash\>' || a:name =~ '\<bash2\>' let b:is_bash = 1 if exists("b:is_kornshell") unlet b:is_kornshell endif if exists("b:is_sh") unlet b:is_sh endif elseif a:name =~ '\<sh\>' let b:is_sh = 1 if exists("b:is_kornshell") unlet b:is_kornshell endif if exists("b:is_bash") unlet b:is_bash endif endif call dist#ft#SetFileTypeShell("sh") endfunc " For shell-like file types, check for an "exec" command hidden in a comment, " as used for Tcl. " Also called from scripts.vim, thus can't be local to this script. func dist#ft#SetFileTypeShell(name) if did_filetype() " Filetype was already detected return endif if expand("<amatch>") =~ g:ft_ignore_pat return endif let l = 2 while l < 20 && l < line("$") && getline(l) =~ '^\s*\(#\|$\)' " Skip empty and comment lines. let l = l + 1 endwhile if l < line("$") && getline(l) =~ '\s*exec\s' && getline(l - 1) =~ '^\s*#.*\\$' " Found an "exec" line after a comment with continuation let n = substitute(getline(l),'\s*exec\s\+\([^ ]*/\)\=', '', '') if n =~ '\<tclsh\|\<wish' setf tcl return endif endif exe "setf " . a:name endfunc func dist#ft#CSH() if did_filetype() " Filetype was already detected return endif if exists("g:filetype_csh") call dist#ft#SetFileTypeShell(g:filetype_csh) elseif &shell =~ "tcsh" call dist#ft#SetFileTypeShell("tcsh") else call dist#ft#SetFileTypeShell("csh") endif endfunc let s:ft_rules_udev_rules_pattern = '^\s*\cudev_rules\s*=\s*"\([^"]\{-1,}\)/*".*' func dist#ft#FTRules() let path = expand('<amatch>:p') if path =~ '/\(etc/udev/\%(rules\.d/\)\=.*\.rules\|\%(usr/\)\=lib/udev/\%(rules\.d/\)\=.*\.rules\)$' setf udevrules return endif if path =~ '^/etc/ufw/' setf conf " Better than hog return endif if path =~ '^/\(etc\|usr/share\)/polkit-1/rules\.d' setf javascript return endif try let config_lines = readfile('/etc/udev/udev.conf') catch /^Vim\%((\a\+)\)\=:E484/ setf hog return endtry let dir = expand('<amatch>:p:h') for line in config_lines if line =~ s:ft_rules_udev_rules_pattern let udev_rules = substitute(line, s:ft_rules_udev_rules_pattern, '\1', "") if dir == udev_rules setf udevrules endif break endif endfor setf hog endfunc func dist#ft#SQL() if exists("g:filetype_sql") exe "setf " . g:filetype_sql else setf sql endif endfunc " If the file has an extension of 't' and is in a directory 't' or 'xt' then " it is almost certainly a Perl test file. " If the first line starts with '#' and contains 'perl' it's probably a Perl " file. " (Slow test) If a file contains a 'use' statement then it is almost certainly " a Perl file. func dist#ft#FTperl() let dirname = expand("%:p:h:t") if expand("%:e") == 't' && (dirname == 't' || dirname == 'xt') setf perl return 1 endif if getline(1)[0] == '#' && getline(1) =~ 'perl' setf perl return 1 endif let save_cursor = getpos('.') call cursor(1,1) let has_use = search('^use\s\s*\k', 'c', 30) call setpos('.', save_cursor) if has_use setf perl return 1 endif return 0 endfunc " Choose context, plaintex, or tex (LaTeX) based on these rules: " 1. Check the first line of the file for "%&<format>". " 2. Check the first 1000 non-comment lines for LaTeX or ConTeXt keywords. " 3. Default to "plain" or to g:tex_flavor, can be set in user's vimrc. func dist#ft#FTtex() let firstline = getline(1) if firstline =~ '^%&\s*\a\+' let format = tolower(matchstr(firstline, '\a\+')) let format = substitute(format, 'pdf', '', '') if format == 'tex' let format = 'latex' elseif format == 'plaintex' let format = 'plain' endif elseif expand('%') =~ 'tex/context/.*/.*.tex' let format = 'context' else " Default value, may be changed later: let format = exists("g:tex_flavor") ? g:tex_flavor : 'plain' " Save position, go to the top of the file, find first non-comment line. let save_cursor = getpos('.') call cursor(1,1) let firstNC = search('^\s*[^[:space:]%]', 'c', 1000) if firstNC " Check the next thousand lines for a LaTeX or ConTeXt keyword. let lpat = 'documentclass\>\|usepackage\>\|begin{\|newcommand\>\|renewcommand\>\|part\>\|chapter\>\|section\>\|subsection\>\|subsubsection\>\|paragraph\>\|subparagraph\>\|subsubparagraph' let cpat = 'start\a\+\|setup\a\+\|usemodule\|enablemode\|enableregime\|setvariables\|useencoding\|usesymbols\|stelle\a\+\|verwende\a\+\|stel\a\+\|gebruik\a\+\|usa\a\+\|imposta\a\+\|regle\a\+\|utilisemodule\>' let kwline = search('^\s*\\\%(' . lpat . '\)\|^\s*\\\(' . cpat . '\)', \ 'cnp', firstNC + 1000) if kwline == 1 " lpat matched let format = 'latex' elseif kwline == 2 " cpat matched let format = 'context' endif " If neither matched, keep default set above. " let lline = search('^\s*\\\%(' . lpat . '\)', 'cn', firstNC + 1000) " let cline = search('^\s*\\\%(' . cpat . '\)', 'cn', firstNC + 1000) " if cline > 0 " let format = 'context' " endif " if lline > 0 && (cline == 0 || cline > lline) " let format = 'tex' " endif endif " firstNC call setpos('.', save_cursor) endif " firstline =~ '^%&\s*\a\+' " Translation from formats to file types. TODO: add AMSTeX, RevTex, others? if format == 'plain' setf plaintex elseif format == 'context' setf context else " probably LaTeX setf tex endif return endfunc func dist#ft#FTxml() let n = 1 while n < 100 && n <= line("$") let line = getline(n) " DocBook 4 or DocBook 5. let is_docbook4 = line =~ '<!DOCTYPE.*DocBook' let is_docbook5 = line =~ ' xmlns="http://docbook.org/ns/docbook"' if is_docbook4 || is_docbook5 let b:docbk_type = "xml" if is_docbook5 let b:docbk_ver = 5 else let b:docbk_ver = 4 endif setf docbk return endif if line =~ 'xmlns:xbl="http://www.mozilla.org/xbl"' setf xbl return endif let n += 1 endwhile setf xml endfunc func dist#ft#FTy() let n = 1 while n < 100 && n <= line("$") let line = getline(n) if line =~ '^\s*%' setf yacc return endif if getline(n) =~ '^\s*\(#\|class\>\)' && getline(n) !~ '^\s*#\s*include' setf racc return endif let n = n + 1 endwhile setf yacc endfunc func dist#ft#Redif() let lnum = 1 while lnum <= 5 && lnum < line('$') if getline(lnum) =~ "^\ctemplate-type:" setf redif return endif let lnum = lnum + 1 endwhile endfunc " This function is called for all files under */debian/patches/*, make sure not " to non-dep3patch files, such as README and other text files. func dist#ft#Dep3patch() if expand('%:t') ==# 'series' return endif for ln in getline(1, 100) if ln =~# '^\%(Description\|Subject\|Origin\|Bug\|Forwarded\|Author\|From\|Reviewed-by\|Acked-by\|Last-Updated\|Applied-Upstream\):' setf dep3patch return elseif ln =~# '^---' " end of headers found. stop processing return endif endfor endfunc " Restore 'cpoptions' let &cpo = s:cpo_save unlet s:cpo_save
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