feat: prettier for astro

autoload/ale/fix/registry.vim

@@ -152,7 +152,7 @@ let s:default_registry = {
 \   },
 \   'prettier': {
 \       'function': 'ale#fixers#prettier#Fix',
-\       'suggested_filetypes': ['javascript', 'typescript', 'css', 'less', 'scss', 'json', 'json5', 'graphql', 'markdown', 'vue', 'svelte', 'html', 'yaml', 'openapi', 'ruby'],
+\       'suggested_filetypes': ['javascript', 'typescript', 'css', 'less', 'scss', 'json', 'json5', 'graphql', 'markdown', 'vue', 'svelte', 'html', 'yaml', 'openapi', 'ruby', 'astro'],
 \       'description': 'Apply prettier to a file.',
 \   },
 \   'prettier_eslint': {

autoload/ale/fixers/prettier.vim

@@ -79,6 +79,7 @@ function! ale#fixers#prettier#ApplyFixForVersion(buffer, version) abort
         \    'openapi': 'yaml',
         \    'html': 'html',
         \    'ruby': 'ruby',
+        \    'astro': 'astro',
         \}
 
         for l:filetype in l:filetypes

test/fixers/test_prettier_fixer_callback.vader

@@ -293,6 +293,20 @@ Execute(Should set --parser based on first filetype of multiple filetypes):
   \     . ' --stdin-filepath %s --stdin',
   \ }
 
+Execute(Should set --parser based on first filetype of multiple filetypes):
+  call ale#test#SetFilename('../test-files/prettier/testfile')
+
+  set filetype=astro
+
+  GivenCommandOutput ['1.6.0']
+  AssertFixer
+  \ {
+  \   'cwd': '%s:h',
+  \   'command': ale#Escape(g:ale_javascript_prettier_executable)
+  \     . ' --parser astro'
+  \     . ' --stdin-filepath %s --stdin',
+  \ }
+
 Execute(Should set --parser for experimental language, Handlebars):
   call ale#test#SetFilename('../test-files/prettier/testfile.hbs')