webpack/lib/ProgressPlugin.js

Packs CommonJs/AMD modules for the browser. Allows to split your codebase into multiple bundles, which can be loaded on demand. Support loaders to preprocess files, i.e. json, jade, coffee, css, less, ... and your custom stuff.

/*
	MIT License http://www.opensource.org/licenses/mit-license.php
	Author Tobias Koppers @sokra
*/
function ProgressPlugin(handler) {
	this.handler = handler;
}
module.exports = ProgressPlugin;

ProgressPlugin.prototype.apply = function(compiler) {
	var handler = this.handler;
	if(compiler.compilers) {
		var states = new Array(compiler.compilers.length);
		compiler.compilers.forEach(function(compiler, idx) {
			compiler.apply(new ProgressPlugin(function(p, msg) {
				states[idx] = [p, msg];
				handler(states.map(function(state) {
					return state && state[0] || 0;
				}).reduce(function(a, b) {
					return a + b;
				}) / states.length, states.map(function(state) {
					return state && state[1];
				}).filter(Boolean).join(" | "));
			}));
		});
	} else {
		var lastModulesCount = 0;
		var moduleCount = 1;
		var doneModules = 0;
		function update() {
			handler(0.1 + (doneModules / Math.max(lastModulesCount, moduleCount)) * 0.6, doneModules + "/" + moduleCount + " build modules");
		}
		compiler.plugin("compilation", function(compilation) {
			if(compilation.compiler.isChild()) return;
			lastModulesCount = moduleCount;
			moduleCount = 0;
			doneModules = 0;
			handler(0, "compile");
			compilation.plugin("build-module", function(module) {
				moduleCount++;
				update();
			});
			compilation.plugin("succeed-module", function(module) {
				doneModules++;
				update();
			});
			compilation.plugin("optimize", function() {
				handler(0.73, "optimize");
			});
			compilation.plugin("before-hash", function() {
				handler(0.75, "hashing");
			});
			compilation.plugin("before-chunk-assets", function() {
				handler(0.76, "create chunk assets");
			});
			compilation.plugin("additional-chunk-assets", function() {
				handler(0.78, "additional chunk assets");
			});
			compilation.plugin("optimize-chunk-assets", function(chunks, callback) {
				handler(0.8, "optimize chunk assets");
				callback();
			});
			compilation.plugin("optimize-assets", function(assets, callback) {
				handler(0.9, "optimize assets");
				callback();
			});
		});
		compiler.plugin("emit", function(compilation, callback) {
			handler(0.95, "emit");
			callback();
		});
		compiler.plugin("done", function(stats) {
			handler(1, "");
		});
	}
};