Added initial implements of System.AsyncProcess.

Author: mikoto2000

autoload/vital/__vital__/System/AsyncProcess.vim

@@ -0,0 +1,57 @@
+let s:save_cpoptions = &cpoptions
+set cpoptions&vim
+
+let s:is_windows = has('win32') " This means any versions of windows https://github.com/vim-jp/vital.vim/wiki/Coding-Rule#how-to-check-if-the-runtime-os-is-windows
+
+let s:TYPE_DICT = type({})
+let s:TYPE_LIST = type([])
+let s:TYPE_STRING = type('')
+
+function! s:_vital_loaded(V) abort
+  let s:V = a:V
+endfunction
+
+function! s:_vital_depends() abort
+  return []
+endfunction
+
+" execute({command}, {options})
+"   {command} = string
+"   {options} = {
+"     out_cb: function,
+"     err_cb: function,
+"     exit_cb: function,
+"   }
+function! s:execute(command, options) abort
+
+  if !type(a:options) is s:TYPE_DICT
+    throw 'vital: AsyncProcess: invalid argument (value type:' . type(a:options) . ')'
+  endif
+
+  " Process a:command argument.
+  if type(a:command) is s:TYPE_STRING
+    let command = a:command
+  elseif type(a:command) is s:TYPE_LIST
+    let command = join(a:command, ' ')
+  else
+    throw 'vital: AsyncProcess: invalid argument (value type:' . type(a:command) . ')'
+  endif
+
+  " build args
+  " TODO: support powershell, pwsh
+  let args = []
+  if s:is_windows
+    let args = args + ['/c']
+  else
+    let args = args + ['-c']
+  endif
+  let args = args + [command]
+
+  " TODO: support nvim
+  call job_start([&shell] + args, a:options)
+
+endfunction
+
+let &cpoptions = s:save_cpoptions
+unlet s:save_cpoptions
+