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Process.vim
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Process.vim
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" TODO: move all comments to doc file.
"
"
" FIXME: This module name should be Vital.System ?
" But the name has been already taken.
let s:save_cpo = &cpo
set cpo&vim
" FIXME: Unfortunately, can't use s:_vital_loaded() for this purpose.
" Because these variables are used when this script file is loaded.
let s:is_windows = has('win16') || has('win32') || has('win64') || has('win95')
let s:is_unix = has('unix')
" Execute program in the background from Vim.
" Return an empty string always.
"
" If a:expr is a List, shellescape() each argument.
" If a:expr is a String, the arguments are passed as-is.
"
" Windows:
" Using :!start , execute program without via cmd.exe.
" Spawning 'expr' with 'noshellslash'
" keep special characters from unwanted expansion.
" (see :help shellescape())
"
" Unix:
" using :! , execute program in the background by shell.
function! s:spawn(expr, ...)
if s:is_windows
let shellslash = &l:shellslash
setlocal noshellslash
endif
try
if type(a:expr) is type([])
let special = 1
let cmdline = join(map(a:expr, 'shellescape(v:val, special)'), ' ')
elseif type(a:expr) is type("")
let cmdline = a:expr
if a:0 && a:1
" for :! command
let cmdline = substitute(cmdline, '\([!%#]\|<[^<>]\+>\)', '\\\1', 'g')
endif
else
throw 'Process.spawn(): invalid argument (value type:'.type(a:expr).')'
endif
if s:is_windows
silent execute '!start' cmdline
else
silent execute '!' cmdline '&'
endif
finally
if s:is_windows
let &l:shellslash = shellslash
endif
endtry
return ''
endfunction
" iconv() wrapper for safety.
function! s:iconv(expr, from, to)
if a:from == '' || a:to == '' || a:from ==? a:to
return a:expr
endif
let result = iconv(a:expr, a:from, a:to)
return result != '' ? result : a:expr
endfunction
" Check vimproc.
function! s:has_vimproc()
if !exists('s:exists_vimproc')
try
call vimproc#version()
let s:exists_vimproc = 1
catch
let s:exists_vimproc = 0
endtry
endif
return s:exists_vimproc
endfunction
" * {command} [, {input} [, {timeout}]]
" * {command} [, {dict}]
" {dict} = {
" use_vimproc: bool,
" input: string,
" timeout: bool,
" }
function! s:system(str, ...)
if type(a:str) is type([])
let command = join(map(copy(a:str), 's:shellescape(v:val)'), ' ')
elseif type(a:str) is type("")
let command = a:str
else
throw 'Process.system(): invalid argument (value type:'.type(a:str).')'
endif
let command = s:iconv(command, &encoding, 'char')
let input = ''
let use_vimproc = s:has_vimproc()
let args = [command]
if a:0 ==# 1
if type(a:1) is type({})
if has_key(a:1, 'use_vimproc')
let use_vimproc = a:1.use_vimproc
endif
if has_key(a:1, 'input')
let args += [s:iconv(a:1.input, &encoding, 'char')]
endif
if use_vimproc && has_key(a:1, 'timeout')
" ignores timeout unless you have vimproc.
let args += [a:1.timeout]
endif
endif
elseif a:0 >= 2
let [input; rest] = a:000
let input = s:iconv(a:1, &encoding, 'char')
let args += [input] + rest
endif
if use_vimproc
" vimproc's parser seems to treat # as a comment
let args[0] = escape(args[0], '#')
let funcname = 'vimproc#system'
else
let funcname = 'system'
endif
let output = call(funcname, args)
let output = s:iconv(output, 'char', &encoding)
return output
endfunction
function! s:get_last_status()
return s:has_vimproc() ?
\ vimproc#get_last_status() : v:shell_error
endfunction
if s:is_windows
function! s:shellescape(command)
return substitute(a:command, '[&()[\]{}^=;!''+,`~]', '^\0', 'g')
endfunction
else
function! s:shellescape(...)
return call('shellescape', a:000)
endfunction
endif
let &cpo = s:save_cpo
unlet s:save_cpo
" vim:set et ts=2 sts=2 sw=2 tw=0: