From e00931bc110107690f58adabd0fa3c220ec35731 Mon Sep 17 00:00:00 2001
From: Min RK <benjaminrk@gmail.com>
Date: Wed, 29 Apr 2015 14:04:59 -0700
Subject: [PATCH] compile main.min.js for each application

- build-main.js is a separate file, spawned with process.fork to allow parallel builds
- gulp js builds main.min.js for each js application
---
 .gitignore    |  1 +
 build-main.js | 57 +++++++++++++++++++++++++++++++++++++++++++++++++++
 gulpfile.js   | 46 +++++++++++++++++++++++++++++++++++++++--
 package.json  |  1 +
 4 files changed, 103 insertions(+), 2 deletions(-)
 create mode 100644 build-main.js

diff --git a/.gitignore b/.gitignore
index d10a9932c..d142057e4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ docs/source/api/generated
 docs/gh-pages
 notebook/static/components
 notebook/static/style/*.min.css*
+notebook/static/*/js/main.min.js*
 node_modules
 *.py[co]
 __pycache__
diff --git a/build-main.js b/build-main.js
new file mode 100644
index 000000000..5936b791d
--- /dev/null
+++ b/build-main.js
@@ -0,0 +1,57 @@
+// build main.min.js
+// spawned by gulp to allow parallelism
+
+var rjs = require('requirejs').optimize;
+
+var name = process.argv[2];
+
+var rjs_config = {
+  name: name + '/js/main',
+  out: './notebook/static/' + name + '/js/main.min.js',
+  baseUrl: 'notebook/static',
+  preserveLicenseComments: false, // license comments conflict with sourcemap generation
+  generateSourceMaps: true,
+  optimize: "uglify2",
+  paths: {
+    underscore : 'components/underscore/underscore-min',
+    backbone : 'components/backbone/backbone-min',
+    jquery: 'components/jquery/jquery.min',
+    bootstrap: 'components/bootstrap/js/bootstrap.min',
+    bootstraptour: 'components/bootstrap-tour/build/js/bootstrap-tour.min',
+    jqueryui: 'components/jquery-ui/ui/minified/jquery-ui.min',
+    moment: 'components/moment/moment',
+    codemirror: 'components/codemirror',
+    termjs: 'components/term.js/src/term',
+    contents: 'empty:'
+  },
+  shim: {
+    underscore: {
+      exports: '_'
+    },
+    backbone: {
+      deps: ["underscore", "jquery"],
+      exports: "Backbone"
+    },
+    bootstrap: {
+      deps: ["jquery"],
+      exports: "bootstrap"
+    },
+    bootstraptour: {
+      deps: ["bootstrap"],
+      exports: "Tour"
+    },
+    jqueryui: {
+      deps: ["jquery"],
+      exports: "$"
+    }
+  },
+
+  exclude: [
+    "custom/custom",
+  ]
+};
+
+rjs(rjs_config, console.log, function (err) {
+  console.log("Failed to build", name, err);
+  process.exit(1);
+});
diff --git a/gulpfile.js b/gulpfile.js
index 3bb0297be..2e9b4992c 100644
--- a/gulpfile.js
+++ b/gulpfile.js
@@ -1,13 +1,15 @@
+var fork = require('child_process').fork;
+var path = require('path');
+
 var gulp = require('gulp');
 var less = require('gulp-less');
-var path = require('path');
 var minifyCSS = require('gulp-minify-css');
 var rename = require('gulp-rename');
 var sourcemaps = require('gulp-sourcemaps');
 
 // now some dev nice utilities.
 var livereload = require('gulp-livereload');
- 
+
 gulp.task('css', function () {
   return gulp.src('./notebook/static/style/*.less')
     .pipe(sourcemaps.init())
@@ -23,9 +25,49 @@ gulp.task('css', function () {
     .pipe(livereload());
 });
 
+function build_main(name, callback) {
+  // build main.min.js for a given application name
+  // run in a subprocess to allow parallel builds
+  // clone requirejs config
+  var p = fork('./build-main.js', [name]);
+  p.on('exit', function (code, status) {
+    if (code) {
+      callback(new Error("Build failed"));
+    } else {
+      callback();
+    }
+  });
+  return;
+}
+
+// build notebook-js, edit-js, etc. tasks
+// which enables parallelism
+var apps = ['edit', 'notebook', 'terminal', 'tree'];
+
+apps.map(function (name) {
+  gulp.task(name + '-js', function (finish) {
+    build_main(name, finish);
+  });
+});
 
+gulp.task('js', apps.map(function (name) { return name + '-js'; }));
 
 gulp.task('watch', function() {
   livereload.listen();
   gulp.watch('notebook/static/**/*.less', ['css']);
+  
+  var s = path.join('notebook', 'static');
+  
+  function alljs(name) {
+    return path.join(s, name, '**', '*.js');
+  }
+  var common_js = ['components', 'base', 'auth', 'services'].map(alljs);
+  
+  gulp.watch(common_js, ['js']);
+  apps.map(function (name) {
+    gulp.watch([
+      alljs(name),
+      '!' + path.join(s, name, 'js', 'main.min.js'),
+    ], [name + '-js']);
+  });
 });
diff --git a/package.json b/package.json
index 93f03877d..381a854cc 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
     "gulp-rename": "^1.2.2",
     "gulp-sourcemaps": "^1.5.1",
     "less": "~2",
+    "requirejs": "^2.1.17",
     "source-map": "^0.4.2"
   }
 }