add google-java-format fixer

README.md

@@ -108,7 +108,7 @@ formatting.
 | Haskell | [brittany](https://github.com/lspitzner/brittany), [ghc](https://www.haskell.org/ghc/), [stack-ghc](https://haskellstack.org/), [stack-build](https://haskellstack.org/) !!, [ghc-mod](https://github.com/DanielG/ghc-mod), [stack-ghc-mod](https://github.com/DanielG/ghc-mod), [hlint](https://hackage.haskell.org/package/hlint), [hdevtools](https://hackage.haskell.org/package/hdevtools), [hfmt](https://github.com/danstiner/hfmt) |
 | HTML | [HTMLHint](http://htmlhint.com/), [proselint](http://proselint.com/), [tidy](http://www.html-tidy.org/), [write-good](https://github.com/btford/write-good) |
 | Idris | [idris](http://www.idris-lang.org/) |
-| Java | [checkstyle](http://checkstyle.sourceforge.net), [javac](http://www.oracle.com/technetwork/java/javase/downloads/index.html) |
+| Java | [checkstyle](http://checkstyle.sourceforge.net), [javac](http://www.oracle.com/technetwork/java/javase/downloads/index.html), [google-java-format](https://github.com/google/google-java-format) |
 | JavaScript | [eslint](http://eslint.org/), [flow](https://flowtype.org/), [jscs](http://jscs.info/), [jshint](http://jshint.com/), [prettier](https://github.com/prettier/prettier), prettier-eslint >= 4.2.0, prettier-standard, [standard](http://standardjs.com/), [xo](https://github.com/sindresorhus/xo)
 | JSON | [jsonlint](http://zaa.ch/jsonlint/), [prettier](https://github.com/prettier/prettier) |
 | Kotlin | [kotlinc](https://kotlinlang.org) !!, [ktlint](https://ktlint.github.io) !! see `:help ale-integration-kotlin` for configuration instructions |

autoload/ale/fix/registry.vim

@@ -154,6 +154,11 @@ let s:default_registry = {
 \       'suggested_filetypes': ['sh'],
 \       'description': 'Fix sh files with shfmt.',
 \   },
+\   'google_java_format': {
+\       'function': 'ale#fixers#google_java_format#Fix',
+\       'suggested_filetypes': ['java'],
+\       'description': 'Fix Java files with google-java-format.',
+\   },
 \}
 
 " Reset the function registry to the default entries.

autoload/ale/fixers/google_java_format.vim

@@ -0,0 +1,23 @@
+" Author: butlerx <butlerx@notthe,cloud>
+" Description: Integration of Google-java-format with ALE.
+
+call ale#Set('google_java_format_executable', 'google-java-format')
+call ale#Set('google_java_format_use_global', 0)
+call ale#Set('google_java_format_options', '')
+
+function! ale#fixers#google_java_format#Fix(buffer) abort
+    let l:options = ale#Var(a:buffer, 'google_java_format_options')
+    let l:executable = ale#Var(a:buffer, 'google_java_format_executable')
+
+    if !executable(l:executable)
+        return 0
+    endif
+
+    return {
+    \   'command': ale#Escape(l:executable)
+    \       . ' ' . (empty(l:options) ? '' : ' ' . l:options)
+    \       . ' --replace'
+    \       . ' %t',
+    \   'read_temporary_file': 1,
+    \}
+endfunction

doc/ale-java.txt

@@ -33,5 +33,24 @@ g:ale_java_javac_options                             *g:ale_java_javac_options*
   This variable can be set to pass additional options to javac.
 
 
+===============================================================================
+google-java-format                                 *ale-java-google-java-format*
+
+
+g:ale_java_google_java_format_executable  *g:ale_java_google_java_format_executable*
+                                          *b:ale_java_google_java_format_executable*
+  Type: |String|
+  Default: `'google-java-format'`
+
+  See |ale-integrations-local-executables|
+
+
+g:ale_java_google_java_format_options     *g:ale_java_google_java_format_options*
+                                          *b:ale_java_google_java_format_options*
+  Type: |String|
+  Default: `''`
+
+  This variable can be set to pass additional options
+
 ===============================================================================
   vim:tw=78:ts=2:sts=2:sw=2:ft=help:norl:

doc/ale.txt

@@ -93,6 +93,7 @@ CONTENTS                                                         *ale-contents*
     java..................................|ale-java-options|
       checkstyle..........................|ale-java-checkstyle|
       javac...............................|ale-java-javac|
+      google-java-format..................|ale-java-google-java-format|
     javascript............................|ale-javascript-options|
       eslint..............................|ale-javascript-eslint|
       flow................................|ale-javascript-flow|

test/fixers/test_goofle_java_format_fixer_callback.vader

@@ -0,0 +1,27 @@
+Before:
+  Save g:ale_google_java_format_executable
+
+  " Use an invalid global executable, so we don't match it.
+  let g:ale_google_java_format_executable = 'xxxinvalid'
+
+  call ale#test#SetDirectory('/testplugin/test/fixers')
+
+After:
+  Restore
+
+  call ale#test#RestoreDirectory()
+
+Execute(The google-java-format callback should return 0 when the executable isn't executable):
+  AssertEqual
+  \ 0,
+  \ ale#fixers#google_java_format#Fix(bufnr(''))
+
+Execute(The google-java-format callback should run the command when the executable test passes):
+  let g:ale_google_java_format_executable = has('win32') ? 'cmd' : 'echo'
+
+  AssertEqual
+  \ {
+  \   'read_temporary_file': 1,
+  \   'command': ale#Escape(ale_google_java_format_executable) . '  --replace %t'
+  \ },
+  \ ale#fixers#google_java_format#Fix(bufnr(''))