Merge pull request #842 from gfontenot/gf-swiftformat

Add support for SwiftFormat as a fixer

autoload/ale/fix/registry.vim

@@ -72,6 +72,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['css', 'sass', 'scss', 'stylus'],
 \       'description': 'Fix stylesheet files using stylelint --fix.',
 \   },
+\   'swiftformat': {
+\       'function': 'ale#fixers#swiftformat#Fix',
+\       'suggested_filetypes': ['swift'],
+\       'description': 'Apply SwiftFormat to a file.',
+\   },
 \}
 
 " Reset the function registry to the default entries.

autoload/ale/fixers/swiftformat.vim

@@ -0,0 +1,25 @@
+" Author: gfontenot (Gordon Fontenot) <gordon@fonten.io>
+" Description: Integration of SwiftFormat with ALE.
+
+call ale#Set('swift_swiftformat_executable', 'swiftformat')
+call ale#Set('swift_swiftformat_use_global', 0)
+call ale#Set('swift_swiftformat_options', '')
+
+function! ale#fixers#swiftformat#GetExecutable(buffer) abort
+    return ale#node#FindExecutable(a:buffer, 'swift_swiftformat', [
+    \   'Pods/SwiftFormat/CommandLineTool/swiftformat',
+    \   'ios/Pods/SwiftFormat/CommandLineTool/swiftformat',
+    \   'swiftformat',
+    \])
+endfunction
+
+function! ale#fixers#swiftformat#Fix(buffer) abort
+    let l:options = ale#Var(a:buffer, 'swift_swiftformat_options')
+
+    return {
+    \   'read_temporary_file': 1,
+    \   'command': ale#Escape(ale#fixers#swiftformat#GetExecutable(a:buffer))
+    \       . ' %t'
+    \       . ' ' . l:options,
+    \}
+endfunction