mirror of https://github.com/webpack/webpack.git
452 lines
12 KiB
JavaScript
452 lines
12 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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/*global $hash$ installedModules $require$ hotDownloadManifest hotDownloadUpdateChunk modules */
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module.exports = function() {
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var hotApplyOnUpdate = true;
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var hotCurrentHash = $hash$; // eslint-disable-line no-unused-vars
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var hotCurrentModuleData = {};
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var hotCurrentParents = []; // eslint-disable-line no-unused-vars
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function hotCreateRequire(moduleId) { // eslint-disable-line no-unused-vars
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var me = installedModules[moduleId];
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if(!me) return $require$;
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var fn = function(request) {
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if(me.hot.active) {
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if(installedModules[request]) {
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if(installedModules[request].parents.indexOf(moduleId) < 0)
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installedModules[request].parents.push(moduleId);
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if(me.children.indexOf(request) < 0)
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me.children.push(request);
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} else hotCurrentParents = [moduleId];
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} else {
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console.warn("[HMR] unexpected require(" + request + ") from disposed module " + moduleId);
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hotCurrentParents = [];
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}
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return $require$(request);
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};
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for(var name in $require$) {
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if(Object.prototype.hasOwnProperty.call($require$, name)) {
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fn[name] = $require$[name];
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}
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}
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fn.e = function(chunkId, callback) {
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if(hotStatus === "ready")
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hotSetStatus("prepare");
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hotChunksLoading++;
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$require$.e(chunkId, function() {
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try {
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callback.call(null, fn);
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} finally {
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finishChunkLoading();
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}
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function finishChunkLoading() {
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hotChunksLoading--;
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if(hotStatus === "prepare") {
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if(!hotWaitingFilesMap[chunkId]) {
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hotEnsureUpdateChunk(chunkId);
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}
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if(hotChunksLoading === 0 && hotWaitingFiles === 0) {
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hotUpdateDownloaded();
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}
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}
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}
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});
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};
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return fn;
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}
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function hotCreateModule(moduleId) { // eslint-disable-line no-unused-vars
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var hot = {
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// private stuff
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_acceptedDependencies: {},
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_declinedDependencies: {},
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_selfAccepted: false,
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_selfDeclined: false,
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_disposeHandlers: [],
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// Module API
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active: true,
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accept: function(dep, callback) {
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if(typeof dep === "undefined")
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hot._selfAccepted = true;
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else if(typeof dep === "function")
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hot._selfAccepted = dep;
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else if(typeof dep === "object")
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for(var i = 0; i < dep.length; i++)
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hot._acceptedDependencies[dep[i]] = callback;
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else
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hot._acceptedDependencies[dep] = callback;
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},
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decline: function(dep) {
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if(typeof dep === "undefined")
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hot._selfDeclined = true;
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else if(typeof dep === "number")
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hot._declinedDependencies[dep] = true;
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else
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for(var i = 0; i < dep.length; i++)
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hot._declinedDependencies[dep[i]] = true;
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},
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dispose: function(callback) {
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hot._disposeHandlers.push(callback);
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},
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addDisposeHandler: function(callback) {
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hot._disposeHandlers.push(callback);
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},
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removeDisposeHandler: function(callback) {
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var idx = hot._disposeHandlers.indexOf(callback);
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if(idx >= 0) hot._disposeHandlers.splice(idx, 1);
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},
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// Management API
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check: hotCheck,
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apply: hotApply,
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status: function(l) {
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if(!l) return hotStatus;
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hotStatusHandlers.push(l);
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},
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addStatusHandler: function(l) {
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hotStatusHandlers.push(l);
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},
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removeStatusHandler: function(l) {
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var idx = hotStatusHandlers.indexOf(l);
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if(idx >= 0) hotStatusHandlers.splice(idx, 1);
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},
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//inherit from previous dispose call
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data: hotCurrentModuleData[moduleId]
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};
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return hot;
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}
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var hotStatusHandlers = [];
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var hotStatus = "idle";
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function hotSetStatus(newStatus) {
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hotStatus = newStatus;
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for(var i = 0; i < hotStatusHandlers.length; i++)
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hotStatusHandlers[i].call(null, newStatus);
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}
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// while downloading
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var hotWaitingFiles = 0;
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var hotChunksLoading = 0;
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var hotWaitingFilesMap = {};
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var hotRequestedFilesMap = {};
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var hotAvailibleFilesMap = {};
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var hotCallback;
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// The update info
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var hotUpdate, hotUpdateNewHash;
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function toModuleId(id) {
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var isNumber = (+id) + "" === id;
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return isNumber ? +id : id;
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}
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function hotCheck(apply, callback) {
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if(hotStatus !== "idle") throw new Error("check() is only allowed in idle status");
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if(typeof apply === "function") {
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hotApplyOnUpdate = false;
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callback = apply;
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} else {
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hotApplyOnUpdate = apply;
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callback = callback || function(err) {
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if(err) throw err;
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};
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}
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hotSetStatus("check");
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hotDownloadManifest(function(err, update) {
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if(err) return callback(err);
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if(!update) {
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hotSetStatus("idle");
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callback(null, null);
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return;
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}
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hotRequestedFilesMap = {};
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hotAvailibleFilesMap = {};
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hotWaitingFilesMap = {};
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for(var i = 0; i < update.c.length; i++)
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hotAvailibleFilesMap[update.c[i]] = true;
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hotUpdateNewHash = update.h;
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hotSetStatus("prepare");
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hotCallback = callback;
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hotUpdate = {};
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/*foreachInstalledChunks*/
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{ // eslint-disable-line no-lone-blocks
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/*globals chunkId */
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hotEnsureUpdateChunk(chunkId);
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}
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if(hotStatus === "prepare" && hotChunksLoading === 0 && hotWaitingFiles === 0) {
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hotUpdateDownloaded();
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}
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});
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}
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function hotAddUpdateChunk(chunkId, moreModules) { // eslint-disable-line no-unused-vars
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if(!hotAvailibleFilesMap[chunkId] || !hotRequestedFilesMap[chunkId])
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return;
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hotRequestedFilesMap[chunkId] = false;
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for(var moduleId in moreModules) {
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if(Object.prototype.hasOwnProperty.call(moreModules, moduleId)) {
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hotUpdate[moduleId] = moreModules[moduleId];
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}
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}
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if(--hotWaitingFiles === 0 && hotChunksLoading === 0) {
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hotUpdateDownloaded();
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}
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}
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function hotEnsureUpdateChunk(chunkId) {
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if(!hotAvailibleFilesMap[chunkId]) {
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hotWaitingFilesMap[chunkId] = true;
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} else {
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hotRequestedFilesMap[chunkId] = true;
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hotWaitingFiles++;
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hotDownloadUpdateChunk(chunkId);
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}
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}
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function hotUpdateDownloaded() {
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hotSetStatus("ready");
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var callback = hotCallback;
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hotCallback = null;
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if(!callback) return;
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if(hotApplyOnUpdate) {
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hotApply(hotApplyOnUpdate, callback);
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} else {
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var outdatedModules = [];
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for(var id in hotUpdate) {
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if(Object.prototype.hasOwnProperty.call(hotUpdate, id)) {
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outdatedModules.push(toModuleId(id));
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}
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}
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callback(null, outdatedModules);
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}
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}
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function hotApply(options, callback) {
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if(hotStatus !== "ready") throw new Error("apply() is only allowed in ready status");
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if(typeof options === "function") {
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callback = options;
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options = {};
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} else if(options && typeof options === "object") {
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callback = callback || function(err) {
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if(err) throw err;
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};
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} else {
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options = {};
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callback = callback || function(err) {
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if(err) throw err;
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};
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}
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function getAffectedStuff(module) {
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var outdatedModules = [module];
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var outdatedDependencies = {};
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var queue = outdatedModules.slice();
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while(queue.length > 0) {
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var moduleId = queue.pop();
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var module = installedModules[moduleId];
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if(!module || module.hot._selfAccepted)
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continue;
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if(module.hot._selfDeclined) {
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return new Error("Aborted because of self decline: " + moduleId);
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}
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if(moduleId === 0) {
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return;
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}
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for(var i = 0; i < module.parents.length; i++) {
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var parentId = module.parents[i];
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var parent = installedModules[parentId];
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if(parent.hot._declinedDependencies[moduleId]) {
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return new Error("Aborted because of declined dependency: " + moduleId + " in " + parentId);
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}
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if(outdatedModules.indexOf(parentId) >= 0) continue;
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if(parent.hot._acceptedDependencies[moduleId]) {
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if(!outdatedDependencies[parentId])
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outdatedDependencies[parentId] = [];
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addAllToSet(outdatedDependencies[parentId], [moduleId]);
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continue;
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}
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delete outdatedDependencies[parentId];
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outdatedModules.push(parentId);
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queue.push(parentId);
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}
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}
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return [outdatedModules, outdatedDependencies];
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}
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function addAllToSet(a, b) {
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for(var i = 0; i < b.length; i++) {
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var item = b[i];
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if(a.indexOf(item) < 0)
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a.push(item);
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}
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}
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// at begin all updates modules are outdated
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// the "outdated" status can propagate to parents if they don't accept the children
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var outdatedDependencies = {};
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var outdatedModules = [];
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var appliedUpdate = {};
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for(var id in hotUpdate) {
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if(Object.prototype.hasOwnProperty.call(hotUpdate, id)) {
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var moduleId = toModuleId(id);
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var result = getAffectedStuff(moduleId);
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if(!result) {
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if(options.ignoreUnaccepted)
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continue;
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hotSetStatus("abort");
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return callback(new Error("Aborted because " + moduleId + " is not accepted"));
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}
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if(result instanceof Error) {
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hotSetStatus("abort");
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return callback(result);
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}
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appliedUpdate[moduleId] = hotUpdate[moduleId];
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addAllToSet(outdatedModules, result[0]);
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for(var moduleId in result[1]) {
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if(Object.prototype.hasOwnProperty.call(result[1], moduleId)) {
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if(!outdatedDependencies[moduleId])
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outdatedDependencies[moduleId] = [];
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addAllToSet(outdatedDependencies[moduleId], result[1][moduleId]);
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}
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}
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}
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}
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// Store self accepted outdated modules to require them later by the module system
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var outdatedSelfAcceptedModules = [];
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for(var i = 0; i < outdatedModules.length; i++) {
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var moduleId = outdatedModules[i];
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if(installedModules[moduleId] && installedModules[moduleId].hot._selfAccepted)
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outdatedSelfAcceptedModules.push({
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module: moduleId,
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errorHandler: installedModules[moduleId].hot._selfAccepted
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});
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}
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// Now in "dispose" phase
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hotSetStatus("dispose");
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var queue = outdatedModules.slice();
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while(queue.length > 0) {
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var moduleId = queue.pop();
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var module = installedModules[moduleId];
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if(!module) continue;
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var data = {};
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// Call dispose handlers
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var disposeHandlers = module.hot._disposeHandlers;
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for(var j = 0; j < disposeHandlers.length; j++) {
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var cb = disposeHandlers[j];
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cb(data);
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}
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hotCurrentModuleData[moduleId] = data;
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// disable module (this disables requires from this module)
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module.hot.active = false;
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// remove module from cache
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delete installedModules[moduleId];
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// remove "parents" references from all children
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for(var j = 0; j < module.children.length; j++) {
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var child = installedModules[module.children[j]];
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if(!child) continue;
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var idx = child.parents.indexOf(moduleId);
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if(idx >= 0) {
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child.parents.splice(idx, 1);
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}
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}
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}
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// remove outdated dependency from module children
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for(var moduleId in outdatedDependencies) {
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if(Object.prototype.hasOwnProperty.call(outdatedDependencies, moduleId)) {
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var module = installedModules[moduleId];
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var moduleOutdatedDependencies = outdatedDependencies[moduleId];
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for(var j = 0; j < moduleOutdatedDependencies.length; j++) {
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var dependency = moduleOutdatedDependencies[j];
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var idx = module.children.indexOf(dependency);
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if(idx >= 0) module.children.splice(idx, 1);
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}
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}
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}
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// Not in "apply" phase
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hotSetStatus("apply");
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hotCurrentHash = hotUpdateNewHash;
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// insert new code
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for(var moduleId in appliedUpdate) {
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if(Object.prototype.hasOwnProperty.call(appliedUpdate, moduleId)) {
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modules[moduleId] = appliedUpdate[moduleId];
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}
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}
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// call accept handlers
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var error = null;
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for(var moduleId in outdatedDependencies) {
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if(Object.prototype.hasOwnProperty.call(outdatedDependencies, moduleId)) {
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var module = installedModules[moduleId];
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var moduleOutdatedDependencies = outdatedDependencies[moduleId];
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var callbacks = [];
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for(var i = 0; i < moduleOutdatedDependencies.length; i++) {
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var dependency = moduleOutdatedDependencies[i];
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var cb = module.hot._acceptedDependencies[dependency];
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if(callbacks.indexOf(cb) >= 0) continue;
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callbacks.push(cb);
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}
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for(var i = 0; i < callbacks.length; i++) {
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var cb = callbacks[i];
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try {
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cb(outdatedDependencies);
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} catch(err) {
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if(!error)
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error = err;
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}
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}
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}
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}
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// Load self accepted modules
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for(var i = 0; i < outdatedSelfAcceptedModules.length; i++) {
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var item = outdatedSelfAcceptedModules[i];
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var moduleId = item.module;
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hotCurrentParents = [moduleId];
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try {
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$require$(moduleId);
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} catch(err) {
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if(typeof item.errorHandler === "function") {
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try {
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item.errorHandler(err);
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} catch(err) {
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if(!error)
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error = err;
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}
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} else if(!error)
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error = err;
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}
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}
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// handle errors in accept handlers and self accepted module load
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if(error) {
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hotSetStatus("fail");
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return callback(error);
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}
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hotSetStatus("idle");
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callback(null, outdatedModules);
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}
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};
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