gulpfile.js

var gulp = require('gulp-param')(require('gulp'), process.argv),
    qunit = require("gulp-qunit"),
    uglify = require('gulp-uglify'),
    clean = require('gulp-clean'),
    bump = require('gulp-bump'),
    replace = require('gulp-replace'),
    rename = require('gulp-rename'),
    SRC = 'lib/underscore.string.js',
    DEST = 'dist',
    MIN_FILE = 'underscore.string.min.js',
    TEST_SUITES = ['test/test.html', 'test/test_underscore/index.html'],
    VERSION_FILES = ['./package.json', './component.json'];

gulp.task('test', function() {
    return gulp.src(TEST_SUITES)
        .pipe(qunit());
});

gulp.task('clean', function() {
    return gulp.src(DEST)
        .pipe(clean());
});

gulp.task('bump-in-js', function(semver) {
    gulp.src(SRC)
        .pipe(replace(/(version:?\s\')([\d\.]*)\'/gi, '$1' + semver + "'"))
        .pipe(gulp.dest('./lib'));
});

// usage: gulp bump -s <% Version %>
// usage: gulp bump --semver <% Version %>
gulp.task('bump', ['bump-in-js'], function(semver) {
    if (typeof semver !== 'string' || semver.length <= 0) {
        console.error('pass a new version `gulp bump --semver 2.4.1`');
        process.exit(1);
    }

    return gulp.src(VERSION_FILES)
        .pipe(bump({
            version: semver
        }))
        .pipe(gulp.dest('./'));
});

gulp.task('build', ['test', 'clean'], function() {
    return gulp.src(SRC)
        .pipe(uglify())
        .pipe(rename(MIN_FILE))
        .pipe(gulp.dest(DEST));
});