gulpfile.js

// Include gulp
var gulp = require('gulp');

// Include plugins
var concat = require('gulp-concat');
var uglify = require('gulp-uglify');
var rename = require('gulp-rename');
var sass = require('gulp-sass');
var optipng = require('gulp-optipng');
var options = ['-o2'];


/**
 *	TASK: optipng
 *	USES: gulp-optipng
 *  DESCRIPTION: Optimize all .png files
 */
gulp.task('optipng', function() {
	return gulp.src('img/logos/*.png')
		.pipe(optipng(options))
		.pipe(gulp.dest('img/optimized/'));
});


/**
 *	TASK: scripts
 *	USES: gulp-concat, gulp-rename, gulp-uglify
 *  DESCRIPTION: Concats all js files, compresses, and renames with .min
 */
gulp.task('scripts', function(){
	return gulp.src([
		'assets/js/jquery.min.js',
		'assets/js/bootstrap.min.js',
		'assets/js/lunr.min.js',
		'assets/js/set-query.js',
        'assets/js/toc.js',
		'assets/js/main.js',
		'assets/js/modalizer.js',
		'assets/js/search.js',
		'assets/js/results.js',
		])
		.pipe(concat('all.js'))
		.pipe(rename({ suffix: '.min' }))
		.pipe(uglify())
		.pipe(gulp.dest('assets-dist/js/'));
});


/**
 *	TASK: scss
 *	USES: gulp-concat, gulp-sass, gulp-rename
 *  DESCRIPTION: Concats all scss files, compresses, and renames with .min
 */
var sassOptions = {
	errLogToConsole: true,
	outputStyle: 'compressed'
};
gulp.task('scss', function() {
	return gulp.src([
		'assets/scss/fonts.scss',
		'assets/scss/variables.scss',
		'assets/scss/mixins.scss',
		'assets/scss/bootstrap-overrides.scss',
		'assets/scss/custom-styling.scss',
		'assets/scss/post.scss'
		])
		.pipe(concat('all.scss'))
		.pipe(sass(sassOptions).on('error', sass.logError))
		.pipe(rename({ suffix: '.min' }))
		.pipe(gulp.dest('assets-dist/css'))
});

/**
 *	TASK: watch
 *	USES: gulp-watch
 *  DESCRIPTION: Runs tasks when a script or stylesheet as been modified.
 */
gulp.task('watch', function() {
	gulp.watch('assets/scss/**/*.scss', ['scss']);
	gulp.watch('assets/js/**/*.js', ['scripts']);
});

// Default task
gulp.task('default', ['scripts', 'sass', 'optipng']);