Support fixing JSON files with fixjson

autoload/ale/fix/registry.vim

@@ -159,6 +159,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['java'],
 \       'description': 'Fix Java files with google-java-format.',
 \   },
+\   'fixjson': {
+\       'function': 'ale#fixers#fixjson#Fix',
+\       'suggested_filetypes': ['json'],
+\       'description': 'Fix JSON files with fixjson.',
+\   },
 \   'jq': {
 \       'function': 'ale#fixers#jq#Fix',
 \       'suggested_filetypes': ['json'],

autoload/ale/fixers/fixjson.vim

@@ -0,0 +1,20 @@
+" Author: rhysd <https://rhysd.github.io>
+" Description: Integration of fixjson with ALE.
+
+call ale#Set('json_fixjson_executable', 'fixjson')
+call ale#Set('json_fixjson_options', '')
+
+function! ale#fixers#fixjson#Fix(buffer) abort
+    let l:executable = ale#Escape(ale#Var(a:buffer, 'json_fixjson_executable'))
+    let l:filename = ale#Escape(bufname(a:buffer))
+    let l:command = l:executable . ' --stdin-filename ' . l:filename
+
+    let l:options = ale#Var(a:buffer, 'json_fixjson_options')
+    if l:options isnot# ''
+        let l:command .= ' ' . l:options
+    endif
+
+    return {
+    \   'command': l:command
+    \}
+endfunction