add perltidy fixer

README.md

@@ -132,7 +132,7 @@ formatting.
 | Objective-C | [clang](http://clang.llvm.org/) |
 | Objective-C++ | [clang](http://clang.llvm.org/) |
 | OCaml | [merlin](https://github.com/the-lambda-church/merlin) see `:help ale-ocaml-merlin` for configuration instructions, [ols](https://github.com/freebroccolo/ocaml-language-server) |
-| Perl | [perl -c](https://perl.org/), [perl-critic](https://metacpan.org/pod/Perl::Critic) |
+| Perl | [perl -c](https://perl.org/), [perl-critic](https://metacpan.org/pod/Perl::Critic), [perltidy](https://metacpan.org/pod/distribution/Perl-Tidy/bin/perltidy) |
 | PHP | [hack](http://hacklang.org/), [hackfmt](https://github.com/facebook/flow/tree/master/hack/hackfmt), [langserver](https://github.com/felixfbecker/php-language-server), [phan](https://github.com/phan/phan) see `:help ale-php-phan` to instructions, [php -l](https://secure.php.net/), [phpcs](https://github.com/squizlabs/PHP_CodeSniffer), [phpmd](https://phpmd.org), [phpstan](https://github.com/phpstan/phpstan), [phpcbf](https://github.com/squizlabs/PHP_CodeSniffer), [php-cs-fixer](http://cs.sensiolabs.org/) |
 | PO | [alex](https://github.com/wooorm/alex) !!, [msgfmt](https://www.gnu.org/software/gettext/manual/html_node/msgfmt-Invocation.html), [proselint](http://proselint.com/), [write-good](https://github.com/btford/write-good) |
 | Pod | [alex](https://github.com/wooorm/alex) !!, [proselint](http://proselint.com/), [write-good](https://github.com/btford/write-good) |

autoload/ale/fix/registry.vim

@@ -185,6 +185,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['json'],
 \       'description': 'Fix JSON files with jq.',
 \   },
+\   'perltidy': {
+\       'function': 'ale#fixers#perltidy#Fix',
+\       'suggested_filetypes': ['perl'],
+\       'description': 'Fix Perl files with perltidy.',
+\   },
 \}
 
 " Reset the function registry to the default entries.

autoload/ale/fixers/perltidy.vim

@@ -0,0 +1,18 @@
+" Author: kfly8 <kentafly88@gmail.com>
+" Description: Integration of perltidy with ALE.
+
+call ale#Set('perl_perltidy_executable', 'perltidy')
+call ale#Set('perl_perltidy_options', '')
+
+function! ale#fixers#perltidy#Fix(buffer) abort
+    let l:executable = ale#Var(a:buffer, 'perl_perltidy_executable')
+    let l:options = ale#Var(a:buffer, 'perl_perltidy_options')
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . ' -b'
+    \       . (empty(l:options) ? '' : ' ' . l:options)
+    \       . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction

doc/ale-perl.txt

@@ -76,7 +76,16 @@ g:ale_perl_perlcritic_showrules               *g:ale_perl_perlcritic_showrules*
 
   Controls whether perlcritic rule names are shown after the error message.
   Defaults to off to reduce length of message.
+===============================================================================
+perltidy                                                    *ale-perl-perltidy*
 
+g:ale_perl_perltidy_options                       *g:ale_perl_perltidy_options*
+                                                  *b:ale_perl_perltidy_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be changed to alter the command-line arguments to
+  the perltidy invocation.
 
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -156,6 +156,7 @@ CONTENTS                                                         *ale-contents*
     perl..................................|ale-perl-options|
       perl................................|ale-perl-perl|
       perlcritic..........................|ale-perl-perlcritic|
+      perltidy............................|ale-perl-perltidy|
     php...................................|ale-php-options|
       hack................................|ale-php-hack|
       hackfmt.............................|ale-php-hackfmt|
@@ -364,7 +365,7 @@ Notes:
 * Objective-C: `clang`
 * Objective-C++: `clang`
 * OCaml: `merlin` (see |ale-ocaml-merlin|), `ols`
-* Perl: `perl -c`, `perl-critic`
+* Perl: `perl -c`, `perl-critic`, `perltidy`
 * PHP: `hack`, `hackfmt`, `langserver`, `phan`, `php -l`, `phpcs`, `phpmd`, `phpstan`, `phpcbf`, `php-cs-fixer`
 * PO: `alex`!!, `msgfmt`, `proselint`, `write-good`
 * Pod: `alex`!!, `proselint`, `write-good`

test/fixers/test_perltidy_fixer_callback.vader

@@ -0,0 +1,40 @@
+Before:
+  Save g:ale_perl_perltidy_executable
+  Save g:ale_perl_perltidy_options
+
+  " Use an invalid global executable, so we don't match it.
+  let g:ale_perl_perltidy_executable = 'xxxinvalid'
+  let g:ale_perl_perltidy_options = ''
+
+  call ale#test#SetDirectory('/testplugin/test/fixers')
+
+After:
+  Restore
+
+  call ale#test#RestoreDirectory()
+
+Execute(The perltidy callback should return the correct default values):
+  call ale#test#SetFilename('../pl_files/testfile.pl')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': ale#Escape('xxxinvalid')
+  \     . ' -b'
+  \     . ' %t',
+  \ },
+  \ ale#fixers#perltidy#Fix(bufnr(''))
+
+Execute(The perltidy callback should include custom perltidy options):
+  let g:ale_perl_perltidy_options = "-r '(a) -> a'"
+  call ale#test#SetFilename('../pl_files/testfile.pl')
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': ale#Escape('xxxinvalid')
+  \     . ' -b'
+  \     . ' ' . g:ale_perl_perltidy_options
+  \     . ' %t',
+  \ },
+  \ ale#fixers#perltidy#Fix(bufnr(''))