forked from aniani/vim
299d8e5eec
Problem: Filetype detection from file contents is in legacy script. Solution: Use a compiled function for filetype detection.
427 lines
11 KiB
VimL
427 lines
11 KiB
VimL
vim9script
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# Vim function for detecting a filetype from the file contents.
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# Invoked from "scripts.vim" in 'runtimepath'
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#
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# Maintainer: Bram Moolenaar <Bram@vim.org>
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# Last Change: 2022 Feb 13
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export def DetectFiletype()
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var line1 = getline(1)
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if line1[0] == '#' && line1[1] == '!'
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# File that starts with "#!".
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DetectFromHashBang(line1)
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else
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# File does not start with "#!".
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DetectFromText(line1)
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endif
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enddef
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# Called for a script that has "#!" in the first line.
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def DetectFromHashBang(firstline: string)
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var line1 = firstline
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# Check for a line like "#!/usr/bin/env {options} bash". Turn it into
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# "#!/usr/bin/bash" to make matching easier.
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# Recognize only a few {options} that are commonly used.
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if line1 =~ '^#!\s*\S*\<env\s'
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line1 = substitute(line1, '\S\+=\S\+', '', 'g')
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line1 = substitute(line1, '\(-[iS]\|--ignore-environment\|--split-string\)', '', '')
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line1 = substitute(line1, '\<env\s\+', '', '')
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endif
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# Get the program name.
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# Only accept spaces in PC style paths: "#!c:/program files/perl [args]".
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# If the word env is used, use the first word after the space:
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# "#!/usr/bin/env perl [path/args]"
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# If there is no path use the first word: "#!perl [path/args]".
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# Otherwise get the last word after a slash: "#!/usr/bin/perl [path/args]".
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var name: string
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if line1 =~ '^#!\s*\a:[/\\]'
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name = substitute(line1, '^#!.*[/\\]\(\i\+\).*', '\1', '')
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elseif line1 =~ '^#!.*\<env\>'
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name = substitute(line1, '^#!.*\<env\>\s\+\(\i\+\).*', '\1', '')
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elseif line1 =~ '^#!\s*[^/\\ ]*\>\([^/\\]\|$\)'
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name = substitute(line1, '^#!\s*\([^/\\ ]*\>\).*', '\1', '')
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else
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name = substitute(line1, '^#!\s*\S*[/\\]\(\i\+\).*', '\1', '')
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endif
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# tcl scripts may have #!/bin/sh in the first line and "exec wish" in the
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# third line. Suggested by Steven Atkinson.
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if getline(3) =~ '^exec wish'
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name = 'wish'
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endif
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# Bourne-like shell scripts: bash bash2 ksh ksh93 sh
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if name =~ '^\(bash\d*\|\|ksh\d*\|sh\)\>'
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call dist#ft#SetFileTypeSH(line1)
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# csh scripts
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elseif name =~ '^csh\>'
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if exists("g:filetype_csh")
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call dist#ft#SetFileTypeShell(g:filetype_csh)
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else
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call dist#ft#SetFileTypeShell("csh")
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endif
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# tcsh scripts
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elseif name =~ '^tcsh\>'
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call dist#ft#SetFileTypeShell("tcsh")
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# Z shell scripts
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elseif name =~ '^zsh\>'
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set ft=zsh
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# TCL scripts
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elseif name =~ '^\(tclsh\|wish\|expectk\|itclsh\|itkwish\)\>'
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set ft=tcl
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# Expect scripts
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elseif name =~ '^expect\>'
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set ft=expect
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# Gnuplot scripts
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elseif name =~ '^gnuplot\>'
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set ft=gnuplot
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# Makefiles
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elseif name =~ 'make\>'
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set ft=make
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# Pike
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elseif name =~ '^pike\%(\>\|[0-9]\)'
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set ft=pike
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# Lua
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elseif name =~ 'lua'
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set ft=lua
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# Perl
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elseif name =~ 'perl'
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set ft=perl
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# PHP
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elseif name =~ 'php'
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set ft=php
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# Python
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elseif name =~ 'python'
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set ft=python
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# Groovy
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elseif name =~ '^groovy\>'
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set ft=groovy
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# Raku
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elseif name =~ 'raku'
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set ft=raku
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# Ruby
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elseif name =~ 'ruby'
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set ft=ruby
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# JavaScript
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elseif name =~ 'node\(js\)\=\>\|js\>' || name =~ 'rhino\>'
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set ft=javascript
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# BC calculator
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elseif name =~ '^bc\>'
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set ft=bc
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# sed
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elseif name =~ 'sed\>'
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set ft=sed
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# OCaml-scripts
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elseif name =~ 'ocaml'
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set ft=ocaml
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# Awk scripts; also finds "gawk"
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elseif name =~ 'awk\>'
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set ft=awk
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# Website MetaLanguage
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elseif name =~ 'wml'
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set ft=wml
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# Scheme scripts
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elseif name =~ 'scheme'
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set ft=scheme
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# CFEngine scripts
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elseif name =~ 'cfengine'
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set ft=cfengine
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# Erlang scripts
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elseif name =~ 'escript'
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set ft=erlang
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# Haskell
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elseif name =~ 'haskell'
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set ft=haskell
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# Scala
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elseif name =~ 'scala\>'
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set ft=scala
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# Clojure
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elseif name =~ 'clojure'
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set ft=clojure
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# Free Pascal
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elseif name =~ 'instantfpc\>'
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set ft=pascal
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# Fennel
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elseif name =~ 'fennel\>'
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set ft=fennel
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# MikroTik RouterOS script
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elseif name =~ 'rsc\>'
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set ft=routeros
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# Fish shell
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elseif name =~ 'fish\>'
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set ft=fish
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# Gforth
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elseif name =~ 'gforth\>'
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set ft=forth
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endif
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enddef
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# Called for a script that does not have "#!" in the first line.
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def DetectFromText(line1: string)
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var line2 = getline(2)
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var line3 = getline(3)
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var line4 = getline(4)
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var line5 = getline(5)
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# Bourne-like shell scripts: sh ksh bash bash2
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if line1 =~ '^:$'
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call dist#ft#SetFileTypeSH(line1)
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# Z shell scripts
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elseif line1 =~ '^#compdef\>'
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|| line1 =~ '^#autoload\>'
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|| "\n" .. line1 .. "\n" .. line2 .. "\n" .. line3 ..
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"\n" .. line4 .. "\n" .. line5
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=~ '\n\s*emulate\s\+\%(-[LR]\s\+\)\=[ckz]\=sh\>'
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set ft=zsh
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# ELM Mail files
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elseif line1 =~ '^From \([a-zA-Z][a-zA-Z_0-9\.=-]*\(@[^ ]*\)\=\|-\) .* \(19\|20\)\d\d$'
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set ft=mail
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# Mason
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elseif line1 =~ '^<[%&].*>'
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set ft=mason
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# Vim scripts (must have '" vim' as the first line to trigger this)
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elseif line1 =~ '^" *[vV]im$'
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set ft=vim
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# libcxx and libstdc++ standard library headers like "iostream" do not have
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# an extension, recognize the Emacs file mode.
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elseif line1 =~? '-\*-.*C++.*-\*-'
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set ft=cpp
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# MOO
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elseif line1 =~ '^\*\* LambdaMOO Database, Format Version \%([1-3]\>\)\@!\d\+ \*\*$'
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set ft=moo
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# Diff file:
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# - "diff" in first line (context diff)
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# - "Only in " in first line
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# - "--- " in first line and "+++ " in second line (unified diff).
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# - "*** " in first line and "--- " in second line (context diff).
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# - "# It was generated by makepatch " in the second line (makepatch diff).
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# - "Index: <filename>" in the first line (CVS file)
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# - "=== ", line of "=", "---", "+++ " (SVK diff)
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# - "=== ", "--- ", "+++ " (bzr diff, common case)
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# - "=== (removed|added|renamed|modified)" (bzr diff, alternative)
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# - "# HG changeset patch" in first line (Mercurial export format)
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elseif line1 =~ '^\(diff\>\|Only in \|\d\+\(,\d\+\)\=[cda]\d\+\>\|# It was generated by makepatch \|Index:\s\+\f\+\r\=$\|===== \f\+ \d\+\.\d\+ vs edited\|==== //\f\+#\d\+\|# HG changeset patch\)'
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|| (line1 =~ '^--- ' && line2 =~ '^+++ ')
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|| (line1 =~ '^\* looking for ' && line2 =~ '^\* comparing to ')
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|| (line1 =~ '^\*\*\* ' && line2 =~ '^--- ')
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|| (line1 =~ '^=== ' && ((line2 =~ '^=\{66\}' && line3 =~ '^--- ' && line4 =~ '^+++') || (line2 =~ '^--- ' && line3 =~ '^+++ ')))
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|| (line1 =~ '^=== \(removed\|added\|renamed\|modified\)')
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set ft=diff
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# PostScript Files (must have %!PS as the first line, like a2ps output)
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elseif line1 =~ '^%![ \t]*PS'
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set ft=postscr
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# M4 scripts: Guess there is a line that starts with "dnl".
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elseif line1 =~ '^\s*dnl\>'
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|| line2 =~ '^\s*dnl\>'
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|| line3 =~ '^\s*dnl\>'
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|| line4 =~ '^\s*dnl\>'
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|| line5 =~ '^\s*dnl\>'
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set ft=m4
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# AmigaDos scripts
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elseif $TERM == "amiga" && (line1 =~ "^;" || line1 =~? '^\.bra')
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set ft=amiga
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# SiCAD scripts (must have procn or procd as the first line to trigger this)
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elseif line1 =~? '^ *proc[nd] *$'
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set ft=sicad
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# Purify log files start with "**** Purify"
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elseif line1 =~ '^\*\*\*\* Purify'
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set ft=purifylog
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# XML
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elseif line1 =~ '<?\s*xml.*?>'
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set ft=xml
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# XHTML (e.g.: PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN")
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elseif line1 =~ '\<DTD\s\+XHTML\s'
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set ft=xhtml
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# HTML (e.g.: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN")
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# Avoid "doctype html", used by slim.
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elseif line1 =~? '<!DOCTYPE\s\+html\>'
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set ft=html
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# PDF
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elseif line1 =~ '^%PDF-'
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set ft=pdf
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# XXD output
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elseif line1 =~ '^\x\{7}: \x\{2} \=\x\{2} \=\x\{2} \=\x\{2} '
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set ft=xxd
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# RCS/CVS log output
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elseif line1 =~ '^RCS file:' || line2 =~ '^RCS file:'
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set ft=rcslog
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# CVS commit
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elseif line2 =~ '^CVS:' || getline("$") =~ '^CVS: '
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set ft=cvs
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# Prescribe
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elseif line1 =~ '^!R!'
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set ft=prescribe
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# Send-pr
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elseif line1 =~ '^SEND-PR:'
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set ft=sendpr
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# SNNS files
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elseif line1 =~ '^SNNS network definition file'
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set ft=snnsnet
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elseif line1 =~ '^SNNS pattern definition file'
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set ft=snnspat
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elseif line1 =~ '^SNNS result file'
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set ft=snnsres
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# Virata
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elseif line1 =~ '^%.\{-}[Vv]irata'
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|| line2 =~ '^%.\{-}[Vv]irata'
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|| line3 =~ '^%.\{-}[Vv]irata'
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|| line4 =~ '^%.\{-}[Vv]irata'
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|| line5 =~ '^%.\{-}[Vv]irata'
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set ft=virata
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# Strace
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elseif line1 =~ '[0-9:.]* *execve(' || line1 =~ '^__libc_start_main'
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set ft=strace
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# VSE JCL
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elseif line1 =~ '^\* $$ JOB\>' || line1 =~ '^// *JOB\>'
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set ft=vsejcl
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# TAK and SINDA
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elseif line4 =~ 'K & K Associates' || line2 =~ 'TAK 2000'
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set ft=takout
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elseif line3 =~ 'S Y S T E M S I M P R O V E D '
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set ft=sindaout
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elseif getline(6) =~ 'Run Date: '
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set ft=takcmp
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elseif getline(9) =~ 'Node File 1'
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set ft=sindacmp
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# DNS zone files
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elseif line1 .. line2 .. line3 .. line4 =~ '^; <<>> DiG [0-9.]\+.* <<>>\|$ORIGIN\|$TTL\|IN\s\+SOA'
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set ft=bindzone
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# BAAN
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elseif line1 =~ '|\*\{1,80}' && line2 =~ 'VRC '
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|| line2 =~ '|\*\{1,80}' && line3 =~ 'VRC '
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set ft=baan
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# Valgrind
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elseif line1 =~ '^==\d\+== valgrind' || line3 =~ '^==\d\+== Using valgrind'
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set ft=valgrind
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# Go docs
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elseif line1 =~ '^PACKAGE DOCUMENTATION$'
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set ft=godoc
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# Renderman Interface Bytestream
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elseif line1 =~ '^##RenderMan'
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set ft=rib
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# Scheme scripts
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elseif line1 =~ 'exec\s\+\S*scheme' || line2 =~ 'exec\s\+\S*scheme'
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set ft=scheme
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# Git output
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elseif line1 =~ '^\(commit\|tree\|object\) \x\{40,\}\>\|^tag \S\+$'
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set ft=git
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# Gprof (gnu profiler)
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elseif line1 == 'Flat profile:'
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&& line2 == ''
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&& line3 =~ '^Each sample counts as .* seconds.$'
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set ft=gprof
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# Erlang terms
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# (See also: http://www.gnu.org/software/emacs/manual/html_node/emacs/Choosing-Modes.html#Choosing-Modes)
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elseif line1 =~? '-\*-.*erlang.*-\*-'
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set ft=erlang
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# YAML
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elseif line1 =~ '^%YAML'
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set ft=yaml
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# MikroTik RouterOS script
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elseif line1 =~ '^#.*by RouterOS.*$'
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set ft=routeros
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# Sed scripts
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# #ncomment is allowed but most likely a false positive so require a space
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# before any trailing comment text
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elseif line1 =~ '^#n\%($\|\s\)'
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set ft=sed
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else
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var lnum = 1
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while getline(lnum) =~ "^? " && lnum < line("$")
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lnum += 1
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endwhile
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if getline(lnum) =~ '^Index:\s\+\f\+$'
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# CVS diff
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set ft=diff
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# locale input files: Formal Definitions of Cultural Conventions
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# filename must be like en_US, fr_FR@euro or en_US.UTF-8
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elseif expand("%") =~ '\a\a_\a\a\($\|[.@]\)\|i18n$\|POSIX$\|translit_'
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lnum = 1
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while lnum < 100 && lnum < line("$")
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if getline(lnum) =~ '^LC_\(IDENTIFICATION\|CTYPE\|COLLATE\|MONETARY\|NUMERIC\|TIME\|MESSAGES\|PAPER\|TELEPHONE\|MEASUREMENT\|NAME\|ADDRESS\)$'
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setf fdcc
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break
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endif
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lnum += 1
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endwhile
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endif
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endif
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enddef
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