From 87217e03f6ea0f2b632e7ceb0577120ee44d90e8 Mon Sep 17 00:00:00 2001
From: Douglas Duteil <douglasduteil@gmail.com>
Date: Thu, 29 May 2014 14:47:31 +0200
Subject: [PATCH] chore(build): reduce copy time

Use `gulp-changed` to copy only changed files.
---
 lib/build.js | 53 ++++++++++++++++++++++++++++++++++++++--------------
 package.json |  1 +
 2 files changed, 40 insertions(+), 14 deletions(-)

diff --git a/lib/build.js b/lib/build.js
index 7fc25eb..7e3db3f 100644
--- a/lib/build.js
+++ b/lib/build.js
@@ -2,8 +2,9 @@
 
 var cm = require('./common');
 var gulp = require('gulp');
-var path  = require('path');
+var path = require('path');
 var rename = require('gulp-rename');
+var changed = require('gulp-changed');
 
 var DIR = cm.BUILD_DIR;
 
@@ -12,27 +13,33 @@ module.exports = {
   bower: function (done, bwrData) {
 
     var almostDone = cm._.after(5, done);
+    var destination = DIR + '/bower/';
 
     gulp.src('./branch/bower/.travis.yml')
-      .pipe(gulp.dest(DIR + '/bower/'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
     gulp.src('./branch/bower/bower.tmpl.json')
-      .pipe(cm.processTemplateFile({ bwr : cm._.assign({}, cm.bwr, bwrData) }))
+      .pipe(changed(destination))
+      .pipe(cm.processTemplateFile({ bwr: cm._.assign({}, cm.bwr, bwrData) }))
       .pipe(rename('bower.json'))
-      .pipe(gulp.dest(DIR + '/bower/'))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
     gulp.src(path.join('../../dist/', cm.public.main_dist_dir || '') + '/**')
-      .pipe(gulp.dest(DIR + '/bower/'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
     gulp.src('../../CHANGELOG.md')
-      .pipe(gulp.dest(DIR + '/bower/'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
     gulp.src('../../LICENCE')
-      .pipe(gulp.dest(DIR + '/bower/'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
   },
 
@@ -44,24 +51,29 @@ module.exports = {
       var destination = DIR + '/subbower/' + moduleName;
 
       gulp.src('./branch/bower/.travis.yml')
+        .pipe(changed(destination))
         .pipe(gulp.dest(destination))
         .on('end', almostDone);
 
       gulp.src('./branch/bower/bower.tmpl.json')
-        .pipe(cm.processTemplateFile({ bwr : cm._.assign({}, cm.bwr, bwrData) }))
+        .pipe(changed(destination))
+        .pipe(cm.processTemplateFile({ bwr: cm._.assign({}, cm.bwr, bwrData) }))
         .pipe(rename('bower.json'))
         .pipe(gulp.dest(destination))
         .on('end', almostDone);
 
       gulp.src(path.join('../../dist/', cm.public.sub_dist_dir || '', moduleName) + '/**')
+        .pipe(changed(destination))
         .pipe(gulp.dest(destination))
         .on('end', almostDone);
 
       gulp.src('../../CHANGELOG.md')
+        .pipe(changed(destination))
         .pipe(gulp.dest(destination))
         .on('end', almostDone);
 
       gulp.src('../../LICENCE')
+        .pipe(changed(destination))
         .pipe(gulp.dest(destination))
         .on('end', almostDone);
     };
@@ -72,34 +84,47 @@ module.exports = {
 
     if (!cm.public.tocopy)  cm.public.tocopy = [];
     var almostDone = cm._.after(5 + cm.public.tocopy.length, done);
+    var destination;
 
+    destination = DIR + '/gh-pages/vendor';
     cm.public.tocopy
       .map(function (file) {
         gulp.src('../../' + file)
-          .pipe(gulp.dest(DIR + '/gh-pages/vendor'))
+          .pipe(changed(destination))
+          .pipe(gulp.dest(destination))
           .on('end', almostDone);
       });
 
+    destination = DIR + '/gh-pages/core';
     gulp.src('./branch/gh-pages/core/**')
-      .pipe(gulp.dest(DIR + '/gh-pages/core'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
+    destination = DIR + '/gh-pages/assets';
     gulp.src('./branch/gh-pages/assets/**')
-      .pipe(gulp.dest(DIR + '/gh-pages/assets'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
 
+    destination = DIR + '/gh-pages/demo';
     gulp.src('../../demo/**')
-      .pipe(gulp.dest(DIR + '/gh-pages/demo'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
+    destination = DIR + '/gh-pages/dist';
     gulp.src(path.join('../../dist/', cm.public.main_dist_dir || '') + '/**')
-      .pipe(gulp.dest(DIR + '/gh-pages/dist'))
+      .pipe(changed(destination))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
 
+    destination = DIR + '/gh-pages/';
     gulp.src('./branch/gh-pages/index.tmp.html')
+      .pipe(changed(destination, {extension: '.html'}))
       .pipe(cm.processTemplateFile())
       .pipe(rename('index.html'))
-      .pipe(gulp.dest(DIR + '/gh-pages/'))
+      .pipe(gulp.dest(destination))
       .on('end', almostDone);
 
   }
diff --git a/package.json b/package.json
index 0524f24..6615a6f 100644
--- a/package.json
+++ b/package.json
@@ -7,6 +7,7 @@
     "dateformat": "*",
     "event-stream": "*",
     "gulp": "*",
+    "gulp-changed": "^0",
     "gulp-rename": "*",
     "gulp-rimraf": "*",
     "gulp-util": "*",