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gulpfile.js
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gulpfile.js
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var gulp = require('gulp');
var autoprefixer = require('gulp-autoprefixer');
var CacheBust = require('gulp-cachebust');
var concat = require('gulp-concat');
var del = require('del');
var filenames = require("gulp-filenames");
var imagemin = require('gulp-imagemin');
var minifyCss = require('gulp-clean-css');
var notify = require('gulp-notify');
var rename = require('gulp-rename');
var replace = require('gulp-replace-task');
var sass = require('gulp-sass');
var sourcemaps = require('gulp-sourcemaps');
var uglify = require('gulp-uglify');
var watch = require('gulp-watch');
var cachebust = new CacheBust();
/**
* Mainly used to generate the <script></script> and <link> (aka, CSS) tags in our main HTML file. Used in conjunction
* with `templates` variable.
*
* @see this.templates
*
* @param {string} templateString A string with "{replace}" in it
* @param {string} replacementText The text to replace "{replace}" with
*/
var generateAssetTag = function(templateString, replacementText){
return templateString.replace('{replace}', replacementText);
};
/**
* Returns map function that will prepend each file with the specified
* path, unless a path starts with './', then it'll be stripped and
* ignored
*/
var prepend = function(path) {
return function(file) {
var startsWithExclusion = file.indexOf('./') === 0;
return startsWithExclusion ? file.slice(2) : path + file;
};
};
// Directory where all the underscore-prepended SCSS files are
var SCSS_INCLUDES_DIR = 'src/frontend/scss';
// Directory to dump all our outputted/processed files to
var OUTPUT_DIR = 'public';
var ASSETS = {
css: {
src: {
/**
* CSS sources from our application. Should just be the SCSS output directory
*/
app: [
'**/*.scss'
].map(prepend(SCSS_INCLUDES_DIR + '/')),
/**
* CSS sources from 3rd party vendors/libraries
*/
vendor: [
].map(prepend('node_modules/'))
},
// Where our CSS goes (after minification and concatenation)
dest: {
prefix: OUTPUT_DIR + '/assets/styles',
// These filenames will get overwritten with cache-busters (ie, there will be a unique hash string injected
// into the filename so that whenever the file contents change, the filename will also change)
appFileName: 'app.css',
vendorFileName: 'vendor.css'
},
template: '<script src="{replace}"></script>'
},
js: {
src: {
/**
* Javascript sources for our app. Should just be the AngularJS code
*/
app: [
'app/**/*.js'
].map(prepend('src/frontend/javascript/')),
/**
* 3rd party vendor javascript libraries
*/
vendor: [
'foundation-sites/dist/foundation.min.js'
].map(prepend('node_modules/'))
},
// Where our javascript goes (after minification and concatenation)
dest: {
prefix: OUTPUT_DIR + '/assets/scripts',
// These filenames will get overwritten with cache-busters (ie, there will be a unique hash string injected
// into the filename so that whenever the file contents change, the filename will also change)
appFileName: 'app.js',
vendorFileName: 'vendor.js'
},
template: '<link rel="stylesheet" href="{replace}">'
},
images: {
src: 'images/**/*',
dest: OUTPUT_DIR + '/assets/images'
}
};
var CONFIG = {
sass: {
includePaths: SCSS_INCLUDES_DIR,
outputStyle: 'expanded'
},
autoprefixer: {
browsers: ['> 5%']
}
};
/**
* Deletes all the files at our destinations (only for JS and CSS, not images)
*/
gulp.task('clean-destination', function () {
return del([
OUTPUT_DIR + '/**/*'
])
});
/**
* Concatenates, cache-busts, and then outputs our assets to our destination folder. Once all 4 "prepare-assets"
* subtasks have completed, there should be 4 files representing our own CSS and JS, and any 3rd party CSS
* and javascript
*
* Note that we do not concat our CSS files. They're expected to be SCSS, which should already output only one file
*
* @see ASSETS.css.dest.prefix
* @see ASSETS.js.dest.prefix
*/
gulp.task("prepare-assets:css:vendor", function(){
return gulp.src(ASSETS.css.src.vendor)
.pipe(minifyCss({keepBreaks:true}))
.pipe(concat(ASSETS.css.dest.vendorFileName))
.pipe(cachebust.resources())
.pipe(filenames("cssVendor"))
.pipe(gulp.dest(ASSETS.css.dest.prefix))
});
gulp.task("prepare-assets:css:app", function(){
return gulp.src(ASSETS.css.src.app)
.pipe(sourcemaps.init())
.pipe(sass(CONFIG.sass))
.pipe(autoprefixer(CONFIG.autoprefixer))
.pipe(minifyCss())
.pipe(cachebust.resources())
.pipe(sourcemaps.write())
.pipe(filenames("cssApp"))
.pipe(gulp.dest(ASSETS.css.dest.prefix));
});
gulp.task("prepare-assets:js:vendor", function(){
return gulp.src(ASSETS.js.src.vendor)
.pipe(uglify())
.pipe(concat(ASSETS.js.dest.vendorFileName))
.pipe(cachebust.resources())
.pipe(filenames("jsVendor"))
.pipe(gulp.dest(ASSETS.js.dest.prefix))
});
gulp.task("prepare-assets:js:app", function(){
gulp.src(ASSETS.js.src.app)
.pipe(uglify())
.pipe(concat(ASSETS.js.dest.appFileName))
.pipe(cachebust.resources())
.pipe(filenames("jsApp"))
.pipe(gulp.dest(ASSETS.js.dest.prefix))
});
// Here we move our images
gulp.task('prepare-assets:images', function() {
return gulp.src(ASSETS.images.src)
.pipe(imagemin({
progressive: true,
svgoPlugins: [
{removeViewBox: false},
{cleanupIDs: false}
],
use: []
}))
.pipe(gulp.dest(ASSETS.images.dest))
});
gulp.task("prepare-assets", [
'clean-destination',
'prepare-assets:css:vendor',
'prepare-assets:js:vendor',
'prepare-assets:css:app',
'prepare-assets:js:app',
'prepare-assets:images'
], function(){
ASSETS.css.dest.vendorFileName = filenames.get('cssVendor');
ASSETS.css.dest.appFileName = filenames.get('cssApp');
ASSETS.js.dest.vendorFileName = filenames.get('jsVendor');
ASSETS.js.dest.appFileName = filenames.get('jsApp');
// Retrieve the cache-busted filenames (eg, "app.5780b122.js"), and write them out to our HTML index file
return gulp.src(['src/frontend/javascript/app/index.html'])
.pipe(notify({ title: "Asset Preparation", message: 'Generating index.html file' }))
.pipe(replace({
patterns: [
{
match: 'cssVendor',
replacement: ASSETS.css.dest.vendorFileName.length ? (generateAssetTag(ASSETS.css.template, ASSETS.css.dest.prefix + '/' + ASSETS.css.dest.vendorFileName)) : ""
},
{
match: 'cssApp',
replacement: ASSETS.css.dest.appFileName.length ? (generateAssetTag(ASSETS.css.template, ASSETS.css.dest.prefix + '/' + ASSETS.css.dest.appFileName)) : ""
},
{
match: 'jsVendor',
replacement: ASSETS.js.dest.vendorFileName.length ? (generateAssetTag(ASSETS.js.template, ASSETS.js.dest.prefix + '/' + ASSETS.js.dest.vendorFileName)) : ""
},
{
match: 'jsApp',
replacement: ASSETS.js.dest.appFileName.length ? generateAssetTag(ASSETS.js.template, ASSETS.js.dest.prefix + '/' + ASSETS.js.dest.appFileName) : ""
}
]
}))
.pipe(gulp.dest('public'));
});
/**
* Main build task
*/
gulp.task('build', [
'prepare-assets'
]);
gulp.task('default', [
'prepare-assets'
]);
/**
* Watch (use `gulp watch`). Detects changes in files and rebuilds app automatically
*/
gulp.task('watch', function(){
gulp.watch(ASSETS.css.src.app, ['prepare-assets']);
gulp.watch(ASSETS.css.src.vendor, ['prepare-assets']);
gulp.watch(ASSETS.js.src.app, ['prepare-assets']);
gulp.watch(ASSETS.js.src.vendor, ['prepare-assets']);
});