feat: add yamlfix fixer

autoload/ale/fix/registry.vim

@@ -110,6 +110,11 @@ let s:default_registry = {
 \       'suggested_filetypes': [],
 \       'description': 'Remove all trailing whitespace characters at the end of every line.',
 \   },
+\   'yamlfix': {
+\       'function': 'ale#fixers#yamlfix#Fix',
+\       'suggested_filetypes': ['python'],
+\       'description': 'Fix yaml files with yamlfix.',
+\   },
 \   'yapf': {
 \       'function': 'ale#fixers#yapf#Fix',
 \       'suggested_filetypes': ['python'],

autoload/ale/fixers/yamlfix.vim

@@ -0,0 +1,25 @@
+" Author: lyz-code
+" Description: Fixing yaml files with yamlfix.
+
+call ale#Set('yaml_yamlfix_executable', 'yamlfix')
+call ale#Set('yaml_yamlfix_options', '')
+call ale#Set('yaml_yamlfix_use_global', get(g:, 'ale_use_global_executables', 0))
+
+function! ale#fixers#yamlfix#Fix(buffer) abort
+    let l:options = ale#Var(a:buffer, 'yaml_yamlfix_options')
+
+    let l:executable = ale#python#FindExecutable(
+    \   a:buffer,
+    \   'yaml_yamlfix',
+    \   ['yamlfix'],
+    \)
+
+    if !executable(l:executable)
+        return 0
+    endif
+
+    return {
+    \   'command': ale#path#BufferCdString(a:buffer)
+    \   .   ale#Escape(l:executable) . (!empty(l:options) ? ' ' . l:options : '') . ' -',
+    \}
+endfunction