gulpfile.coffee

gulp = require 'gulp'
sourcestream = require 'vinyl-source-stream'
buffer = require 'vinyl-buffer'
util = require 'gulp-util'
sourcemaps = require 'gulp-sourcemaps'
uglify = require 'gulp-uglify'
browserify = require 'browserify'
livereload = require 'gulp-livereload'
minify = require 'gulp-minify-css'
express = require 'express'
sass = require 'gulp-sass'
path = require 'path'
del = require 'del'
mkdirp = require 'mkdirp'
fs = require 'fs'

# Utilities
source = (addr) ->
    if addr?
        return ('./app/' + addr)
    else
        return './app'
destination = (addr) ->
    if addr?
        return ('./build/' + addr)
    else
        return './build'

errorHandler = (error) ->
    util.log (util.colors.red 'ERROR:'),  error.message
    this.emit 'end'
    return

# Clean previously generated files
gulp.task 'clean', (cb) ->
    del.sync destination()
    return

# Copy HTML files
gulp.task 'html', ->
    gulp.src source '**/*.html'
        .pipe gulp.dest destination()

# Copy HTML files
gulp.task 'images', ->
    gulp.src source 'images/**/*.*'
    .pipe gulp.dest destination 'images'

# Compile SASS files
gulp.task 'sass', ->
    gulp.src source 'styles/all.scss'
        .pipe sourcemaps.init()
        .pipe sass()
        .on 'error', errorHandler
        .pipe sourcemaps.write './'
        .pipe gulp.dest destination 'styles'

# Create fonts folder
gulp.task 'stylesFolders', ->
    mkdirp.sync (destination 'styles') if !fs.existsSync destination 'styles'
    mkdirp.sync destination 'styles/fonts'
    return

# Copy fonts
gulp.task 'fonts', ['stylesFolders'], ->
    gulp.src source 'styles/fonts/**/*.*'
        .pipe gulp.dest destination 'styles/fonts'

# Browserify JS files
gulp.task 'browserify', ->
    settings =
        entries: source 'js/all.js'
        debug: true

    bundler = browserify settings
    bundler.bundle()
        .on 'error', errorHandler
        .pipe sourcestream 'all.js'
        .pipe buffer()
        .pipe sourcemaps.init loadMaps : true
        .pipe uglify()
        .pipe sourcemaps.write './'
        .pipe gulp.dest destination 'js'

# Copy bower files
gulp.task 'bower', ->
    gulp.src source 'lib/**/*.*'
        .pipe gulp.dest destination 'lib'

# Run webserver
gulp.task 'webserver', ->
    app = express()
    app.use express.static destination()
    app.listen 7300

# Watch changes
gulp.task 'watch', ['webserver'], ->
    lr = livereload
    lr.listen()

    gulp.watch (source '**/*.html'), ['html']
    gulp.watch (source 'images/**/*.*'), ['images']
    gulp.watch (source 'styles/**/*.scss'), ['sass']
    gulp.watch (source 'js/**/*.js'), ['browserify']

    gulp.watch (destination '**/*.*'), (file) ->
        lr.changed file.path
        return
    return

gulp.task 'build', ['clean', 'html', 'sass', 'browserify', 'images', 'bower', 'fonts']
gulp.task 'default', ['build', 'watch']