betajs/betajs-compile

module.exports = function (taskname, source, target, options) {
    this.grunt.loadNpmTasks('grunt-closure-tools');
    this.grunt.loadNpmTasks('grunt-contrib-clean');
    options = options || {};
    taskname = taskname || "closure";
    if (typeof source === "string")
        source = [source];
    target = target || (source[source.length - 1] + ".closure.js");
    var externs = [this.localFile("js/fragments/closure.js-fragment")];
    if (options.jquery)
        externs.push(this.localFile("vendors/jquery-1.9.closure-extern.js"));
    return this.registerTask(taskname, [
        this.addConfigTask("closureCompiler", taskname, {
            options : {
                compilerFile : process.env.CLOSURE_PATH + "/compiler.jar",
                compilerOpts : {
                    compilation_level : 'ADVANCED_OPTIMIZATIONS',
                    warning_level : 'verbose',
                    externs : externs
                }
            },
            src : source,
            dest : target
        }),
        options.keeptarget ? null : this.addConfigTask("clean", taskname, target)
    ]);
};