1 files changed, 185 insertions, 0 deletions
diff --git a/autoload/vital/_crystal/Process.vim b/autoload/vital/_crystal/Process.vim
new file mode 100644
index 00000000..c2deb9e5
--- /dev/null
+++ b/autoload/vital/_crystal/Process.vim
@@ -0,0 +1,185 @@
+if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'crystal') == -1
+  
+" 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')
+" As of 7.4.122, the system()'s 1st argument is converted internally by Vim.
+" Note that Patch 7.4.122 does not convert system()'s 2nd argument and
+" return-value. We must convert them manually.
+let s:need_trans = v:version < 704 || (v:version == 704 && !has('patch122'))
+
+let s:TYPE_DICT = type({})
+let s:TYPE_LIST = type([])
+let s:TYPE_STRING = type("")
+
+
+" 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, ...) abort
+  let shellslash = 0
+  if s:is_windows
+    let shellslash = &l:shellslash
+    setlocal noshellslash
+  endif
+  try
+    if type(a:expr) is s:TYPE_LIST
+      let special = 1
+      let cmdline = join(map(a:expr, 'shellescape(v:val, special)'), ' ')
+    elseif type(a:expr) is s:TYPE_STRING
+      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) abort
+  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() abort
+  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,
+"     background: bool,
+"   }
+function! s:system(str, ...) abort
+  " Process optional arguments at first
+  " because use_vimproc is required later
+  " for a:str argument.
+  let input = ''
+  let use_vimproc = s:has_vimproc()
+  let background = 0
+  let args = []
+  if a:0 ==# 1
+    " {command} [, {dict}]
+    " a:1 = {dict}
+    if type(a:1) is s:TYPE_DICT
+      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
+      if has_key(a:1, 'background')
+        let background = a:1.background
+      endif
+    elseif type(a:1) is s:TYPE_STRING
+      let args += [s:iconv(a:1, &encoding, 'char')]
+    else
+      throw 'Process.system(): invalid argument (value type:'.type(a:1).')'
+    endif
+  elseif a:0 >= 2
+    " {command} [, {input} [, {timeout}]]
+    " a:000 = [{input} [, {timeout}]]
+    let [input; rest] = a:000
+    let input   = s:iconv(input, &encoding, 'char')
+    let args += [input] + rest
+  endif
+
+  " Process a:str argument.
+  if type(a:str) is s:TYPE_LIST
+    let expr = use_vimproc ? '"''" . v:val . "''"' : 's:shellescape(v:val)'
+    let command = join(map(copy(a:str), expr), ' ')
+  elseif type(a:str) is s:TYPE_STRING
+    let command = a:str
+  else
+    throw 'Process.system(): invalid argument (value type:'.type(a:str).')'
+  endif
+  if s:need_trans
+    let command = s:iconv(command, &encoding, 'char')
+  endif
+  let args = [command] + args
+  if background && (use_vimproc || !s:is_windows)
+    let args[0] = args[0] . ' &'
+  endif
+
+  let funcname = use_vimproc ? 'vimproc#system' : 'system'
+  let output = call(funcname, args)
+  let output = s:iconv(output, 'char', &encoding)
+  return output
+endfunction
+
+function! s:get_last_status() abort
+  return s:has_vimproc() ?
+        \ vimproc#get_last_status() : v:shell_error
+endfunction
+
+if s:is_windows
+  function! s:shellescape(command) abort
+    return substitute(a:command, '[&()[\]{}^=;!''+,`~]', '^\0', 'g')
+  endfunction
+else
+  function! s:shellescape(...) abort
+    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:
+
+endif