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gulpfile.js
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gulpfile.js
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// ********************************
// Plugins
// ********************************
var gulp = require("gulp");
// Sass compile to CSS
sass = require("gulp-sass");
// Sourcemaps for Sass
sourcemaps = require("gulp-sourcemaps");
// Autoprefixer
autoprefixer = require("gulp-autoprefixer");
// Browsersync for live changes
browsersync = require("browser-sync").create();
// Useref for JS and CSS concatenation
useref = require("gulp-useref");
// Uglify for minifying of JS
uglify = require("gulp-uglify");
// Gulp If for conditional tasks
gulpIf = require("gulp-if");
// CSSnano to minify CSS
cssnano = require("gulp-cssnano");
// Image minification
imagemin = require("gulp-imagemin");
// Cache
cache = require("gulp-cache");
// Cleaning / deleting no longer used files
del = require("del");
// Run sequence
runSequence = require("run-sequence");
// ********************************
// Development Tasks
// ********************************
// Compile Sass
// ==============================
gulp.task("sass", function() {
// return files with .scss in dir
return gulp.src("app/scss/*.scss")
// Initialise sourcemaps
.pipe(sourcemaps.init())
// Autoprefixer
.pipe(autoprefixer())
// compile sass to css
.pipe(sass().on("error", sass.logError))
// Write sourcemap to current working directory relative to output dir
.pipe(sourcemaps.write("./"))
// Outputs css to css folder
.pipe(gulp.dest("app/css/"))
// live reload browser
.pipe(browsersync.reload({
stream: true
}))
});
// Run browsersync
// ==============================
gulp.task("browsersync", function() {
browsersync.init({
server: {
baseDir: "app"
}
})
});
// Watch for changes with [ array of tasks to complete before watch ]
// ==============================
gulp.task("watch", ["browsersync", "sass"], function() {
// Watch for changes in Sass and run Sass task
gulp.watch("app/scss/**/*.scss", ["sass"]);
// Watch for changes in HTML and reload browser
gulp.watch("app/*.html", browsersync.reload);
// Watch for changes in JS and reload browser
gulp.watch("app/js/**/*.js", browsersync.reload);
});
// ********************************
// Optimization Tasks
// ********************************
// Concatenation / Minification of CSS & JS
// ===============================
gulp.task("useref", function() {
return gulp.src("app/*.html")
.pipe(useref())
// Minify only if it's a JS file
.pipe(gulpIf("*.js", uglify()))
// Minify only if it's a CSS file
.pipe(gulpIf("*.css", cssnano()))
.pipe(gulp.dest("dist"))
});
// Image Optimization
// ===============================
gulp.task("imagemin", function() {
return gulp.src("app/img/**/*.+(png|jpg|gif|svg")
// Cache images that ran through imagemin
.pipe(cache(imagemin()))
.pipe(gulp.dest("dist/img"))
});
// Copy fonts to dist
// ===============================
gulp.task("fonts", function() {
return gulp.src("app/fonts/**/*")
.pipe(gulp.dest("dist/fonts"))
});
// Cleaning
// ===============================
gulp.task("clean", function() {
return del.sync("dist").then(function(cb) {
return cache.clearAll(cb);
});
});
// Cleaning task that is run with gulp clean:dist
// Will delete the dist folder whenever its run
gulp.task("clean:dist", function() {
return del.sync(["dist/**/*", "!dist/img", "!dist/img/**/*"]);
});
// ********************************
// Build Sequences
// ********************************
// Default development — run with "gulp"
// ===============================
gulp.task("default", function(cb){
runSequence(["sass", "browsersync", "watch"],
cb
)
})
// Build task — run with "gulp build"
// ===============================
gulp.task("build", function(cb){
runSequence("clean:dist",
["sass", "useref", "imagemin", "fonts"],
cb
)
})