Add purty fixer.

autoload/ale/fix/registry.vim

@@ -225,6 +225,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['haskell'],
 \       'description': 'Refactor Haskell files with stylish-haskell.',
 \   },
+\   'purty': {
+\       'function': 'ale#fixers#purty#Fix',
+\       'suggested_filetypes': ['purescript'],
+\       'description': 'Format PureScript files with purty.',
+\   },
 \   'ocamlformat': {
 \       'function': 'ale#fixers#ocamlformat#Fix',
 \       'suggested_filetypes': ['ocaml'],

autoload/ale/fixers/purty.vim

@@ -0,0 +1,22 @@
+" Author: iclanzan <sorin@iclanzan.com>
+" Description: Integration of purty with ALE.
+
+call ale#Set('purescript_purty_executable', 'purty')
+
+function! ale#fixers#purty#GetExecutable(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'purescript_purty_executable')
+
+    return ale#Escape(l:executable)
+endfunction
+
+function! ale#fixers#purty#Fix(buffer) abort
+    let l:executable = ale#fixers#purty#GetExecutable(a:buffer)
+
+    return {
+    \   'command': l:executable
+    \       . ' --write'
+    \       . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction
+

doc/ale-purescript.txt

@@ -29,5 +29,14 @@ g:ale_purescript_ls_config                         g:ale_purescript_ls_config
 		\    'buildCommand': 'spago build -- --json-errors'
 		\  }
 		\}
+===============================================================================
+purty                                                    *ale-purescript-purty*
+
+g:ale_purescript_purty_executable           *g:ale_purescript_purty_executable*
+                                            *b:ale_purescript_purty_executable*
+  Type: |String|
+  Default: `'purty'`
+
+  This variable can be changed to use a different executable for purty.
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale-supported-languages-and-tools.txt

@@ -341,6 +341,7 @@ Notes:
   * `puppet-lint`
 * PureScript
   * `purescript-language-server`
+  * `purty`
 * Python
   * `autopep8`
   * `bandit`

doc/ale.txt

@@ -2233,6 +2233,7 @@ documented in additional help files.
     puppet-languageserver.................|ale-puppet-languageserver|
   purescript..............................|ale-purescript-options|
     purescript-language-server............|ale-purescript-language-server|
+    purty.................................|ale-purescript-purty|
   pyrex (cython)..........................|ale-pyrex-options|
     cython................................|ale-pyrex-cython|
   python..................................|ale-python-options|

supported-tools.md

@@ -350,6 +350,7 @@ formatting.
   * [puppet-lint](https://puppet-lint.com)
 * PureScript
   * [purescript-language-server](https://github.com/nwolverson/purescript-language-server)
+  * [purty](https://gitlab.com/joneshf/purty)
 * Python
   * [autopep8](https://github.com/hhatto/autopep8)
   * [bandit](https://github.com/PyCQA/bandit) :warning:

test/fixers/test_purty_fixer_callback.vader

@@ -0,0 +1,24 @@
+Before:
+  Save g:ale_purescript_purty_executable
+
+  " Use an invalid global executable, so we don't match it.
+  let g:ale_purescript_purty_executable = 'my-special-purty'
+
+  call ale#test#SetDirectory('/testplugin/test/fixers')
+
+After:
+  Restore
+
+  call ale#test#RestoreDirectory()
+
+Execute(The purty callback should return the correct options):
+  call ale#test#SetFilename('../purescript_files/testfile.purs')
+
+  AssertEqual
+  \ {
+  \   'command': ale#Escape('my-special-purty')
+  \     . ' --write'
+  \     . ' %t',
+  \   'read_temporary_file': 1,
+  \ },
+  \ ale#fixers#purty#Fix(bufnr(''))