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gulpfile.js

var gulp = require('gulp');

var jade = require('gulp-jade'),
    uglify = require('gulp-uglify'),
    concat = require('gulp-concat'),
    plumber = require('gulp-plumber'),
    sass = require('gulp-sass'),
    imagemin = require('gulp-imagemin'),
    es = require('event-stream'),
    rename = require('gulp-rename');

var paths = {
    templates: {
        src: 'client/*.jade',
        dest: 'build'
    },
    scripts: {
        src: [
            'client/assets/js/**/*.js'
        ],
        dest: 'build/assets/js'
    },
    scripts_concat: {
        entities: [
            {
                filename: 'game',
                src: ['client/assets/js/game/*.js', '!client/assets/js/game/application.js']
            },
            {
                filename: 'libs_external',
                src: 'client/assets/js/libs/external/*.js'
            }
        ],
        dest: 'build/assets/js'
    },
    styles: {
        src: 'client/assets/css/**/*.scss',
        dest: 'build/assets/css'
    },
    images: {
        src: 'client/assets/img/**/*',
        dest: 'build/assets/img'
    },
    moves: {
        src: [
            'client/assets/lang/*.json',
            'client/assets/fonts/*.*',
            'client/assets/css/game/fonts/*.*',
            'client/assets/*.xml'
        ]
    }
};

gulp.task('templates', function () {
    return gulp.src(paths.templates.src)
        .pipe(jade({
            pretty: false // Если нужны древовидные сорцы, в продакшене лучше вырубить(исходники скрыть и размер уменьшить)
        }))
        .pipe(gulp.dest(paths.templates.dest))
});

gulp.task('scripts', function () {
    // Minify and copy all JavaScript
    return gulp.src(paths.scripts.src)
        .pipe(uglify())
        .pipe(gulp.dest(paths.scripts.dest));
});

gulp.task('scripts_concat', function () {
    var scripts = paths.scripts_concat.entities.map(function (entity) {
        return gulp.src(entity.src)
            .pipe(concat(entity.filename + '.js'))
            .pipe(uglify())
            .pipe(gulp.dest(paths.scripts_concat.dest));

    });
    return es.concat.apply(null, scripts);
});

gulp.task('styles', function () {
    return gulp.src(paths.styles.src)
        .pipe(plumber())
        .pipe(sass({
            style: 'compressed'
        }))
        .pipe(gulp.dest(paths.styles.dest));
});

// Copy all static images
gulp.task('images', function () {
    return gulp.src(paths.images.src)
        //.pipe(imagemin({optimizationLevel: 5}))
        .pipe(gulp.dest(paths.images.dest));
});

gulp.task('moves', function () {
    return gulp.src(paths.moves.src, {base: 'client' })
        .pipe(gulp.dest('build'));
});

// Rerun the task when a file changes
gulp.task('watch', function () {
    gulp.watch(paths.templates.src, ['templates']);
    gulp.watch(paths.scripts.src, ['scripts']);
    gulp.watch(paths.scripts_concat.src, ['scripts_concat']);
    gulp.watch(paths.styles.src, ['styles']);
    gulp.watch(paths.images.src, ['images']);
    gulp.watch(paths.moves.src, ['moves']);
});

// The default task (called when you run `gulp` from cli)
gulp.task('default', ['templates', 'scripts', 'scripts_concat', 'styles', 'images', 'moves', 'watch']);
gulp.task('build', ['templates', 'scripts', 'scripts_concat', 'styles', 'images', 'moves']);