#576 Run the eslint.js file created by React with node on Windows

ale_linters/javascript/eslint.vim

@@ -5,8 +5,20 @@ let g:ale_javascript_eslint_options =
 \   get(g:, 'ale_javascript_eslint_options', '')
 
 function! ale_linters#javascript#eslint#GetCommand(buffer) abort
-    return ale#handlers#eslint#GetExecutable(a:buffer)
+    let l:executable = ale#handlers#eslint#GetExecutable(a:buffer)
-    \   . ' ' . ale#Var(a:buffer, 'javascript_eslint_options')
+
+    if ale#Has('win32') && l:executable =~? 'eslint\.js$'
+        " For Windows, if we detect an eslint.js script, we need to execute
+        " it with node, or the file can be opened with a text editor.
+        let l:head = 'node ' . ale#Escape(l:executable)
+    else
+        let l:head = ale#Escape(l:executable)
+    endif
+
+    let l:options = ale#Var(a:buffer, 'javascript_eslint_options')
+
+    return l:head
+    \   . (!empty(l:options) ? ' ' . l:options : '')
     \   . ' -f unix --stdin --stdin-filename %s'
 endfunction
 

test/test_eslint_executable_detection.vader

@@ -7,6 +7,7 @@ Before:
   runtime ale_linters/javascript/eslint.vim
 
 After:
+  let g:ale_has_override = {}
   let g:ale_javascript_eslint_executable = 'eslint'
   let g:ale_javascript_eslint_use_global = 0
 
@@ -63,3 +64,14 @@ Execute(eslint_d should be detected correctly):
   \ ale#handlers#eslint#GetExecutable(bufnr(''))
 
   :q
+
+Execute(eslint.js executables should be run with node on Windows):
+  silent noautocmd new eslint-test-files/react-app/subdir/testfile.js
+  let g:ale_has_override['win32'] = 1
+
+  " We have to execute the file with node.
+  AssertEqual
+  \   'node '''
+  \   . g:dir . '/eslint-test-files/react-app/node_modules/eslint/bin/eslint.js'
+  \   . ''' -f unix --stdin --stdin-filename %s',
+  \ ale_linters#javascript#eslint#GetCommand(bufnr(''))