Add prettier-standard support (#702)

* Add prettier-standard support

* Update ale-javascript.txt

Remove a duplicated header line.

autoload/ale/fix/registry.vim

@@ -12,6 +12,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['python'],
 \       'description': 'Fix PEP8 issues with autopep8.',
 \   },
+\   'prettier_standard': {
+\       'function': 'ale#fixers#prettier_standard#Fix',
+\       'suggested_filetypes': ['javascript'],
+\       'description': 'Apply prettier-standard to a file.',
+\   },
 \   'eslint': {
 \       'function': 'ale#fixers#eslint#Fix',
 \       'suggested_filetypes': ['javascript', 'typescript'],

autoload/ale/fixers/prettier_standard.vim

@@ -0,0 +1,24 @@
+" Author: sheerun (Adam Stankiewicz) <sheerun@sher.pl>
+" Description: Integration of Prettier Standard with ALE.
+
+call ale#Set('javascript_prettier_standard_executable', 'prettier-standard')
+call ale#Set('javascript_prettier_standard_use_global', 0)
+call ale#Set('javascript_prettier_standard_options', '')
+
+function! ale#fixers#prettier_standard#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'javascript_prettier_standard', [
+    \   'node_modules/prettier-standard/lib/index.js',
+    \   'node_modules/.bin/prettier-standard',
+    \])
+endfunction
+
+function! ale#fixers#prettier_standard#Fix(buffer) abort
+    let l:options = ale#Var(a:buffer, 'javascript_prettier_standard_options')
+
+    return {
+    \   'command': ale#Escape(ale#fixers#prettier_standard#GetExecutable(a:buffer))
+    \       . ' %t'
+    \       . ' ' . l:options,
+    \   'read_temporary_file': 1,
+    \}
+endfunction