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<title>[36906] trunk: Improve grunt precommit task</title>
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<dt style="float: left; width: 6em; font-weight: bold">Revision</dt> <dd><a style="font-weight: bold" href="https://core.trac.wordpress.org/changeset/36906">36906</a><script type="application/ld+json">{"@context":"http://schema.org","@type":"EmailMessage","description":"Review this Commit","action":{"@type":"ViewAction","url":"https://core.trac.wordpress.org/changeset/36906","name":"Review Commit"}}</script></dd>
<dt style="float: left; width: 6em; font-weight: bold">Author</dt> <dd>jorbin</dd>
<dt style="float: left; width: 6em; font-weight: bold">Date</dt> <dd>2016-03-09 20:54:10 +0000 (Wed, 09 Mar 2016)</dd>
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<pre style='padding-left: 1em; margin: 2em 0; border-left: 2px solid #ccc; line-height: 1.25; font-size: 105%; font-family: sans-serif'>Improve grunt precommit task

Instead of running all tasks, all the time, let's run tasks based on the files changed. PHPUNIT is now a precommit task for all php file changes. 

This adds a new dependency. Please run `npm install`.

Fixes <a href="https://core.trac.wordpress.org/ticket/35557">#35557</a>
Props  ericlewis, netweb, jorbin</pre>

<h3>Modified Paths</h3>
<ul>
<li><a href="#trunkGruntfilejs">trunk/Gruntfile.js</a></li>
<li><a href="#trunkpackagejson">trunk/package.json</a></li>
</ul>

</div>
<div id="patch">
<h3>Diff</h3>
<a id="trunkGruntfilejs"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/Gruntfile.js</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/Gruntfile.js        2016-03-09 20:43:28 UTC (rev 36905)
+++ trunk/Gruntfile.js  2016-03-09 20:54:10 UTC (rev 36906)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -1,6 +1,7 @@
</span><span class="cx" style="display: block; padding: 0 10px"> /* jshint node:true */
</span><span class="cx" style="display: block; padding: 0 10px"> module.exports = function(grunt) {
</span><span class="cx" style="display: block; padding: 0 10px">        var path = require('path'),
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+                gitorsvn = require('git-or-svn'),
</ins><span class="cx" style="display: block; padding: 0 10px">                 SOURCE_DIR = 'src/',
</span><span class="cx" style="display: block; padding: 0 10px">                BUILD_DIR = 'build/',
</span><span class="cx" style="display: block; padding: 0 10px">                autoprefixer = require('autoprefixer'),
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -658,15 +659,79 @@
</span><span class="cx" style="display: block; padding: 0 10px">                grunt.task.run( '_' + this.nameArgs );
</span><span class="cx" style="display: block; padding: 0 10px">        } );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><del style="background-color: #fdd; text-decoration:none; display:block; padding: 0 10px">-        grunt.registerTask( 'precommit', 'Runs front-end dev/test tasks in preparation for a commit.', [
-               'postcss:core',
-               'imagemin:core',
</del><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+ grunt.registerTask( 'precommit:core', [
+               'imagemin:core'
+       ] );
+
+       grunt.registerTask( 'precommit:js', [
</ins><span class="cx" style="display: block; padding: 0 10px">                 'browserify',
</span><span class="cx" style="display: block; padding: 0 10px">                'jshint:corejs',
</span><span class="cx" style="display: block; padding: 0 10px">                'uglify:bookmarklet',
</span><span class="cx" style="display: block; padding: 0 10px">                'qunit:compiled'
</span><span class="cx" style="display: block; padding: 0 10px">        ] );
</span><span class="cx" style="display: block; padding: 0 10px"> 
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+        grunt.registerTask( 'precommit:css', [
+               'postcss:core'
+       ] );
+
+       grunt.registerTask( 'precommit:php', [
+               'phpunit'
+       ] );
+
+       grunt.registerTask( 'precommit', 'Runs test and build tasks in preparation for a commit', function() {
+               var done = this.async();
+
+               // Figure out what tasks to run based on what files have been modified.
+               function enqueueTestingTasksForModifiedFiles( filesModified ) {
+                       var taskList = ['precommit:core'];
+                       if ( /.*\.js/.test( filesModified ) ) {
+                               grunt.log.write( 'JavaScript source files modified, will run JavaScript tests.\n');
+                               taskList = taskList.concat( ['precommit:js'] );
+                       }
+                       if ( /src.*\.css/.test( filesModified ) ) {
+                               grunt.log.write( 'CSS source files modified, will run CSS tests.\n');
+                               taskList = taskList.concat( ['postcss:core'] );
+                       }
+                       if ( /.*\.php/.test( filesModified ) ) {
+                               grunt.log.write( 'PHP source files modified, will run PHP tests.\n');
+                               taskList = taskList.concat( ['precommit:php'] );
+                       }
+                       grunt.task.run( taskList );
+                       done();
+               }
+               gitorsvn( __dirname, function(gitorsvn) {
+                       if ( gitorsvn === 'svn' ) {
+                               grunt.util.spawn(
+                                       {
+                                               cmd: 'svn',
+                                               args: ['status']
+                                       },
+                                       function(error, result, code) {
+                                               if ( code !== 0 ) {
+                                                       grunt.fail.warn( 'The `svn status` command returned a non-zero exit code.', code );
+                                               }
+                                               enqueueTestingTasksForModifiedFiles( result.stdout );
+                                       }
+                               );
+                       } else if ( gitorsvn === 'git' ) {
+                               grunt.util.spawn(
+                                       {
+                                               cmd: 'git',
+                                               args: ['diff', '--name-only']
+                                       },
+                                       function(error, result, code) {
+                                               if ( code !== 0 ) {
+                                                       grunt.fail.warn( 'The `git diff --name-only` command returned a non-zero exit code.', code );
+                                               }
+                                               enqueueTestingTasksForModifiedFiles( result.stdout );
+                                       }
+                               );
+                       } else {
+                               grunt.log.write( 'This WordPress install is not under version control, no tests will be run.' );
+                       }
+               });
+       });
+
</ins><span class="cx" style="display: block; padding: 0 10px">         grunt.registerTask( 'copy:all', [
</span><span class="cx" style="display: block; padding: 0 10px">                'copy:files',
</span><span class="cx" style="display: block; padding: 0 10px">                'copy:wp-admin-css-compat-rtl',
</span></span></pre></div>
<a id="trunkpackagejson"></a>
<div class="modfile"><h4 style="background-color: #eee; color: inherit; margin: 1em 0; padding: 1.3em; font-size: 115%">Modified: trunk/package.json</h4>
<pre class="diff"><span>
<span class="info" style="display: block; padding: 0 10px; color: #888">--- trunk/package.json        2016-03-09 20:43:28 UTC (rev 36905)
+++ trunk/package.json  2016-03-09 20:54:10 UTC (rev 36906)
</span><span class="lines" style="display: block; padding: 0 10px; color: #888">@@ -10,6 +10,7 @@
</span><span class="cx" style="display: block; padding: 0 10px">   "license": "GPL-2.0+",
</span><span class="cx" style="display: block; padding: 0 10px">   "devDependencies": {
</span><span class="cx" style="display: block; padding: 0 10px">     "autoprefixer": "~6.3.3",
</span><ins style="background-color: #dfd; text-decoration:none; display:block; padding: 0 10px">+    "git-or-svn": "~0.1.0",
</ins><span class="cx" style="display: block; padding: 0 10px">     "grunt": "~0.4.5",
</span><span class="cx" style="display: block; padding: 0 10px">     "grunt-browserify": "~4.0.1",
</span><span class="cx" style="display: block; padding: 0 10px">     "grunt-contrib-clean": "~1.0.0",
</span></span></pre>
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