104 lines
2.5 KiB
JavaScript
104 lines
2.5 KiB
JavaScript
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/*jshint node:true */
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"use strict";
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var colors = require('chalk');
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var gutil = require('gulp-util');
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function verifyTaskSets(gulp, taskSets, skipArrays) {
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if(taskSets.length === 0) {
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throw new Error('No tasks were provided to run-sequence');
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}
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var foundTasks = {};
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taskSets.forEach(function(t) {
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var isTask = typeof t === "string",
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isArray = !skipArrays && Array.isArray(t);
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if(!isTask && !isArray) {
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throw new Error("Task "+t+" is not a valid task string.");
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}
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if(isTask && !gulp.hasTask(t)) {
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throw new Error("Task "+t+" is not configured as a task on gulp. If this is a submodule, you may need to use require('run-sequence').use(gulp).");
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}
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if(skipArrays && isTask) {
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if(foundTasks[t]) {
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throw new Error("Task "+t+" is listed more than once. This is probably a typo.");
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}
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foundTasks[t] = true;
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}
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if(isArray) {
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if(t.length === 0) {
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throw new Error("An empty array was provided as a task set");
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}
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verifyTaskSets(gulp, t, true, foundTasks);
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}
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});
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}
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function runSequence(gulp) {
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// load gulp directly when no external was passed
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if(gulp === undefined) {
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gulp = require('gulp');
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}
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// Slice and dice the input to prevent modification of parallel arrays.
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var taskSets = Array.prototype.slice.call(arguments, 1).map(function(task) {
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return Array.isArray(task) ? task.slice() : task;
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}),
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callBack = typeof taskSets[taskSets.length-1] === 'function' ? taskSets.pop() : false,
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currentTaskSet,
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finish = function(e) {
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gulp.removeListener('task_stop', onTaskEnd);
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gulp.removeListener('task_err', onError);
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var error;
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if (e && e.err) {
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error = new gutil.PluginError('run-sequence(' + e.task + ')', e.err, {showStack: true});
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}
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if(callBack) {
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callBack(error);
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} else if(error) {
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gutil.log(colors.red(error.toString()));
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}
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},
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onError = function(err) {
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finish(err);
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},
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onTaskEnd = function(event) {
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var idx = currentTaskSet.indexOf(event.task);
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if(idx > -1) {
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currentTaskSet.splice(idx,1);
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}
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if(currentTaskSet.length === 0) {
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runNextSet();
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}
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},
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runNextSet = function() {
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if(taskSets.length) {
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var command = taskSets.shift();
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if(!Array.isArray(command)) {
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command = [command];
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}
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currentTaskSet = command;
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gulp.start.apply(gulp, command);
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} else {
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finish();
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}
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};
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verifyTaskSets(gulp, taskSets);
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gulp.on('task_stop', onTaskEnd);
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gulp.on('task_err', onError);
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runNextSet();
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}
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module.exports = runSequence.bind(null, undefined);
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module.exports.use = function(gulp) {
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return runSequence.bind(null, gulp);
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};
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