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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 =~# '\<[gm]\=awk\>'
setfiletype awk
" Perl 5
elseif s:line =~# '\<perl5\=\>'
setfiletype perl
" Perl 6
elseif s:line =~# '\<perl6\>'
setfiletype perl6
" PHP
elseif s:line =~# '\<php\>'
setfiletype php
" Python
elseif s:line =~# '\<python[23]\=\>'
setfiletype python
" Ruby
elseif s:line =~# '\<ruby[23]\=\>'
setfiletype ruby
" sed
elseif s:line =~# '\<sed\>'
setfiletype sed
" Bash
elseif s:line =~# '\<bash\>'
let b:is_bash = 1
setfiletype sh
" Korn shell
elseif s:line =~# '\<\%(\ksh\|ksh93\|mksh\|pdksh\)\>'
let b:is_kornshell = 1
setfiletype sh
" POSIX/Bourne shell
elseif s:line =~# '\<sh\>'
let b:is_posix = 1
setfiletype sh
" TCL
elseif s:line =~# '\<\%(tcl\|wish\)\>'
setfiletype tcl
endif
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