Windows's support for powershell and scripts entrypoints.

autoload/prettier/job/async/neovim.vim

@@ -16,7 +16,14 @@ function! prettier#job#async#neovim#run(cmd, startSelection, endSelection) abort
   let l:out = []
   let l:err = []
 
-  let l:job = jobstart([&shell, &shellcmdflag, a:cmd], {
+  if has('win32') || has('win64')
+    " windows doesn't cope well with job cmd lists
+    let l:job_cmd = a:cmd
+  else
+    let l:job_cmd = [&shell, &shellcmdflag, a:cmd]
+  endif
+
+  let l:job = job_start(l:job_cmd, {
     \ 'stdout_buffered': 1,
     \ 'stderr_buffered': 1,
     \ 'on_stdout': {job_id, data, event -> extend(l:out, data)},

autoload/prettier/job/async/vim.vim

@@ -3,12 +3,19 @@ let s:prettier_job_running = 0
 function! prettier#job#async#vim#run(cmd, startSelection, endSelection) abort
   if s:prettier_job_running == 1
     return
-  endif 
+  endif
   let s:prettier_job_running = 1
 
   let l:bufferName = bufname('%')
 
-  let l:job = job_start([&shell, &shellcmdflag, a:cmd], {
+  if has('win32') || has('win64')
+    " windows doesn't cope well with job cmd lists
+    let l:job_cmd = a:cmd
+  else
+    let l:job_cmd = [&shell, &shellcmdflag, a:cmd]
+  endif
+
+  let l:job = job_start(l:job_cmd, {
     \ 'out_io': 'buffer',
     \ 'err_cb': {channel, msg -> s:onError(msg)},
     \ 'close_cb': {channel -> s:onClose(channel, a:startSelection, a:endSelection, l:bufferName)}})

autoload/prettier/job/runner.vim

@@ -27,7 +27,7 @@ function! s:asyncFormat(cmd, startSelection, endSelection) abort
     " required for Windows support on async operations 
     let l:cmd = a:cmd
     if has('win32') || has('win64')
-      let l:cmd = 'cmd.exe /c ' . a:cmd
+        let l:cmd = g:prettier#win_async_shell_cmds . ' ' . a:cmd
     endif
 
     if s:isAsyncVim

doc/prettier.txt

@@ -137,6 +137,16 @@ By default parsing errors will open the quickfix but can also be disabled
 >
   let g:prettier#quickfix_enabled  = 1
 <
+Running async commands in windows is tricky and usually requires running an extra shell.
+It is set up by default to use cmd as:
+>
+  let g:prettier#win_async_shell_cmds = 'cmd /c'
+<
+but it can be modified to use powershell (desktop or core) or powershell scripts as:
+>
+  let g:prettier#win_async_shell_cmds = 'powershell -Command'
+  let g:prettier#win_async_shell_cmds = 'pwsh -File'
+<
 By default we auto focus on the quickfix when there are errors but can also be disabled
 >
   let g:prettier#quickfix_auto_focus = 0

plugin/prettier.vim

@@ -137,6 +137,10 @@ let g:prettier#config#trailing_comma = get(g:,'prettier#config#trailing_comma',
 " See more: https://prettier.io/docs/en/options.html#require-pragma
 let g:prettier#config#require_pragma=  get(g:, 'prettier#config#require_pragma', 'false')
 
+" Commands to decorate the async job on windows
+" default: 'cmd /c'
+let g:prettier#win_async_shell_cmds = get(g: , 'prettier#win_async_shell_cmds', 'cmd /c')
+
 " synchronous by default
 command! -nargs=? -range=% Prettier call prettier#Prettier(g:prettier#exec_cmd_async, <line1>, <line2>, g:prettier#partial_format)