--- /dev/null
+'use strict';
+
+var grunt = require('../grunt');
+
+// Nodejs libs.
+var path = require('path');
+
+// Set column widths.
+var col1len = 0;
+exports.initCol1 = function(str) {
+ col1len = Math.max(col1len, str.length);
+};
+exports.initWidths = function() {
+ // Widths for options/tasks table output.
+ exports.widths = [1, col1len, 2, 76 - col1len];
+};
+
+// Render an array in table form.
+exports.table = function(arr) {
+ arr.forEach(function(item) {
+ grunt.log.writetableln(exports.widths, ['', grunt.util._.pad(item[0], col1len), '', item[1]]);
+ });
+};
+
+// Methods to run, in-order.
+exports.queue = [
+ 'initOptions',
+ 'initTasks',
+ 'initWidths',
+ 'header',
+ 'usage',
+ 'options',
+ 'optionsFooter',
+ 'tasks',
+ 'footer',
+];
+
+// Actually display stuff.
+exports.display = function() {
+ exports.queue.forEach(function(name) { exports[name](); });
+};
+
+// Header.
+exports.header = function() {
+ grunt.log.writeln('Grunt: The JavaScript Task Runner (v' + grunt.version + ')');
+};
+
+// Usage info.
+exports.usage = function() {
+ grunt.log.header('Usage');
+ grunt.log.writeln(' ' + path.basename(process.argv[1]) + ' [options] [task [task ...]]');
+};
+
+// Options.
+exports.initOptions = function() {
+ // Build 2-column array for table view.
+ exports._options = Object.keys(grunt.cli.optlist).map(function(long) {
+ var o = grunt.cli.optlist[long];
+ var col1 = '--' + (o.negate ? 'no-' : '') + long + (o.short ? ', -' + o.short : '');
+ exports.initCol1(col1);
+ return [col1, o.info];
+ });
+};
+
+exports.options = function() {
+ grunt.log.header('Options');
+ exports.table(exports._options);
+};
+
+exports.optionsFooter = function() {
+ grunt.log.writeln().writelns(
+ 'Options marked with * have methods exposed via the grunt API and should ' +
+ 'instead be specified inside the Gruntfile wherever possible.'
+ );
+};
+
+// Tasks.
+exports.initTasks = function() {
+ // Initialize task system so that the tasks can be listed.
+ grunt.task.init([], {help: true});
+
+ // Build object of tasks by info (where they were loaded from).
+ exports._tasks = [];
+ Object.keys(grunt.task._tasks).forEach(function(name) {
+ exports.initCol1(name);
+ var task = grunt.task._tasks[name];
+ exports._tasks.push(task);
+ });
+};
+
+exports.tasks = function() {
+ grunt.log.header('Available tasks');
+ if (exports._tasks.length === 0) {
+ grunt.log.writeln('(no tasks found)');
+ } else {
+ exports.table(exports._tasks.map(function(task) {
+ var info = task.info;
+ if (task.multi) { info += ' *'; }
+ return [task.name, info];
+ }));
+
+ grunt.log.writeln().writelns(
+ 'Tasks run in the order specified. Arguments may be passed to tasks that ' +
+ 'accept them by using colons, like "lint:files". Tasks marked with * are ' +
+ '"multi tasks" and will iterate over all sub-targets if no argument is ' +
+ 'specified.'
+ );
+ }
+
+ grunt.log.writeln().writelns(
+ 'The list of available tasks may change based on tasks directories or ' +
+ 'grunt plugins specified in the Gruntfile or via command-line options.'
+ );
+};
+
+// Footer.
+exports.footer = function() {
+ grunt.log.writeln().writeln('For more information, see http://gruntjs.com/');
+};