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" Try to determine filetype by examining actual file contents; read as little
" as possible, and try to keep things simple and specific to what I typically
" work on, and will expect to be syntax-highlighted.

" Read first line
let s:line = getline(1)

" If it's not a shebang, we're done
if stridx(s:line, '#!') != 0
  finish
endif

" AWK
if s:line =~# '\m\<[gm]\=awk\>'
  setfiletype awk

" Perl 5
elseif s:line =~# '\m\<perl5\=\>'
  setfiletype perl

" Perl 6
elseif s:line =~# '\m\<perl6\>'
  setfiletype perl6

" PHP
elseif s:line =~# '\m\<php\>'
  setfiletype php

" Python
elseif s:line =~# '\m\<python[23]\=\>'
  setfiletype python

" Ruby
elseif s:line =~# '\m\<ruby[23]\=\>'
  setfiletype ruby

" sed
elseif s:line =~# '\m\<sed\>'
  setfiletype sed

" Bash
elseif s:line =~# '\m\<bash\>'
  let b:is_bash = 1
  setfiletype sh

" Korn shell
elseif s:line =~# '\m\<\%(m\|pd\)\=ksh\%(93\)\=\>'
  let b:is_kornshell = 1
  setfiletype sh

" POSIX/Bourne shell
elseif s:line =~# '\m\<sh\>'
  let b:is_posix = 1
  setfiletype sh

" TCL
elseif s:line =~# '\m\<\%(tcl\|wish\)\>'
  setfiletype tcl

endif