feat: support sqlformat. (#2702)

* feat: support sqlformat.

autoload/ale/fix/registry.vim

@@ -260,6 +260,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['sql'],
 \       'description': 'Fix SQL files with sqlfmt.',
 \   },
+\   'sqlformat': {
+\       'function': 'ale#fixers#sqlformat#Fix',
+\       'suggested_filetypes': ['sql'],
+\       'description': 'Fix SQL files with sqlformat.',
+\   },
 \   'google_java_format': {
 \       'function': 'ale#fixers#google_java_format#Fix',
 \       'suggested_filetypes': ['java'],

autoload/ale/fixers/sqlformat.vim

@@ -0,0 +1,16 @@
+" Author: Cluas <Cluas@live.cn>
+" Description: Fixing files with sqlformat.
+
+call ale#Set('sql_sqlformat_executable', 'sqlformat')
+call ale#Set('sql_sqlformat_options', '')
+
+function! ale#fixers#sqlformat#Fix(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'sql_sqlformat_executable')
+    let l:options = ale#Var(a:buffer, 'sql_sqlformat_options')
+
+    return {
+    \ 'command': ale#Escape(l:executable)
+    \ . (!empty(l:options) ? ' ' . l:options : '')
+    \ . ' -'
+    \}
+endfunction