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/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Tobias Koppers @sokra
*/
"use strict";
const path = require("path");
const util = require("util");
const Module = require("./Module");
const OriginalSource = require("webpack-sources").OriginalSource;
const RawSource = require("webpack-sources").RawSource;
const AsyncDependenciesBlock = require("./AsyncDependenciesBlock");
const Template = require("./Template");
class ContextModule extends Module {
// type ContextMode = "sync" | "eager" | "weak" | "async-weak" | "lazy" | "lazy-once"
// type ContextOptions = { resource: string, recursive: boolean, regExp: RegExp, addon?: string, mode?: ContextMode, chunkName?: string, include?: RegExp, exclude?: RegExp }
// resolveDependencies: (fs: FS, options: ContextOptions, (err: Error?, dependencies: Dependency[]) => void) => void
// options: ContextOptions
constructor(resolveDependencies, options) {
super("javascript/dynamic");
// Info from Factory
this.resolveDependencies = resolveDependencies;
let resource, resourceQuery;
const queryIdx = options.resource.indexOf("?");
if(queryIdx >= 0) {
resource = options.resource.substr(0, queryIdx);
resourceQuery = options.resource.substr(queryIdx);
} else {
resource = options.resource;
resourceQuery = "";
}
this.options = Object.assign({}, options, {
resource: resource,
resourceQuery: resourceQuery
});
this.context = this.options.resource;
if(options.resolveOptions !== undefined)
this.resolveOptions = options.resolveOptions;
// Info from Build
this._contextDependencies = new Set([this.context]);
if(typeof options.mode !== "string")
throw new Error("options.mode is a required option");
}
prettyRegExp(regexString) {
// remove the "/" at the front and the beginning
// "/foo/" -> "foo"
return regexString.substring(1, regexString.length - 1);
}
contextify(context, request) {
return request.split("!").map(subrequest => {
let rp = path.relative(context, subrequest);
if(path.sep === "\\")
rp = rp.replace(/\\/g, "/");
if(rp.indexOf("../") !== 0)
rp = "./" + rp;
return rp;
}).join("!");
}
identifier() {
let identifier = this.context;
if(this.options.resourceQuery)
identifier += ` ${this.options.resourceQuery}`;
if(this.options.mode)
identifier += ` ${this.options.mode}`;
if(!this.options.recursive)
identifier += " nonrecursive";
if(this.options.addon)
identifier += ` ${this.options.addon}`;
if(this.options.regExp)
identifier += ` ${this.options.regExp}`;
if(this.options.include)
identifier += ` include: ${this.options.include}`;
if(this.options.exclude)
identifier += ` exclude: ${this.options.exclude}`;
if(this.options.namespaceObject === "strict")
identifier += " strict namespace object";
else if(this.options.namespaceObject)
identifier += " namespace object";
return identifier;
}
readableIdentifier(requestShortener) {
let identifier = requestShortener.shorten(this.context);
if(this.options.resourceQuery)
identifier += ` ${this.options.resourceQuery}`;
if(this.options.mode)
identifier += ` ${this.options.mode}`;
if(!this.options.recursive)
identifier += " nonrecursive";
if(this.options.addon)
identifier += ` ${requestShortener.shorten(this.options.addon)}`;
if(this.options.regExp)
identifier += ` ${this.prettyRegExp(this.options.regExp + "")}`;
if(this.options.include)
identifier += ` include: ${this.prettyRegExp(this.options.include + "")}`;
if(this.options.exclude)
identifier += ` exclude: ${this.prettyRegExp(this.options.exclude + "")}`;
if(this.options.namespaceObject === "strict")
identifier += " strict namespace object";
else if(this.options.namespaceObject)
identifier += " namespace object";
return identifier;
}
libIdent(options) {
let identifier = this.contextify(options.context, this.context);
if(this.options.mode)
identifier += ` ${this.options.mode}`;
if(this.options.recursive)
identifier += " recursive";
if(this.options.addon)
identifier += ` ${this.contextify(options.context, this.options.addon)}`;
if(this.options.regExp)
identifier += ` ${this.prettyRegExp(this.options.regExp + "")}`;
if(this.options.include)
identifier += ` include: ${this.prettyRegExp(this.options.include + "")}`;
if(this.options.exclude)
identifier += ` exclude: ${this.prettyRegExp(this.options.exclude + "")}`;
return identifier;
}
needRebuild(fileTimestamps, contextTimestamps) {
const ts = contextTimestamps[this.context];
if(!ts) {
return true;
}
return ts >= this.buildInfo.builtTime;
}
build(options, compilation, resolver, fs, callback) {
this.built = true;
this.buildMeta = {};
this.buildInfo = {
builtTime: Date.now(),
contextDependencies: this._contextDependencies
};
this.resolveDependencies(fs, this.options, (err, dependencies) => {
if(err) return callback(err);
// abort if something failed
// this will create an empty context
if(!dependencies) {
callback();
return;
}
// enhance dependencies with meta info
dependencies.forEach(dep => {
dep.loc = dep.userRequest;
dep.request = this.options.addon + dep.request;
});
if(this.options.mode === "sync" || this.options.mode === "eager") {
// if we have an sync or eager context
// just add all dependencies and continue
this.dependencies = dependencies;
} else if(this.options.mode === "lazy-once") {
// for the lazy-once mode create a new async dependency block
// and add that block to this context
if(dependencies.length > 0) {
const block = new AsyncDependenciesBlock(this.options.chunkName, this);
dependencies.forEach(dep => {
block.addDependency(dep);
});
this.addBlock(block);
}
} else if(this.options.mode === "weak" || this.options.mode === "async-weak") {
// we mark all dependencies as weak
dependencies.forEach(dep => dep.weak = true);
this.dependencies = dependencies;
} else if(this.options.mode === "lazy") {
// if we are lazy create a new async dependency block per dependency
// and add all blocks to this context
dependencies.forEach((dep, idx) => {
let chunkName = this.options.chunkName;
if(chunkName) {
if(!/\[(index|request)\]/.test(chunkName))
chunkName += "[index]";
chunkName = chunkName.replace(/\[index\]/g, idx);
chunkName = chunkName.replace(/\[request\]/g, Template.toPath(dep.userRequest));
}
const block = new AsyncDependenciesBlock(chunkName, dep.module, dep.loc, dep.userRequest);
block.addDependency(dep);
this.addBlock(block);
});
} else {
callback(new Error(`Unsupported mode "${this.options.mode}" in context`));
return;
}
callback();
});
}
getUserRequestMap(dependencies) {
// if we filter first we get a new array
// therefor we dont need to create a clone of dependencies explicitly
// therefore the order of this is !important!
return dependencies
.filter(dependency => dependency.module)
.sort((a, b) => {
if(a.userRequest === b.userRequest) {
return 0;
}
return a.userRequest < b.userRequest ? -1 : 1;
}).reduce((map, dep) => {
map[dep.userRequest] = dep.module.id;
return map;
}, Object.create(null));
}
getFakeMap(dependencies) {
if(!this.options.namespaceObject) return 1;
// if we filter first we get a new array
// therefor we dont need to create a clone of dependencies explicitly
// therefore the order of this is !important!
let hasNonHarmony = false;
let hasNamespace = false;
let hasNamed = false;
const fakeMap = dependencies
.filter(dependency => dependency.module)
.sort((a, b) => {
return b.module.id - a.module.id;
}).reduce((map, dep) => {
const exportsType = dep.module.buildMeta && dep.module.buildMeta.exportsType;
if(!exportsType) hasNonHarmony = true;
if(exportsType === "namespace") hasNamespace = true;
if(exportsType === "named") hasNamed = true;
map[dep.module.id] = {
namespace: 1,
named: 2
}[exportsType] || 0;
return map;
}, Object.create(null));
if(!hasNamespace && hasNonHarmony && !hasNamed) return 0;
if(hasNamespace && !hasNonHarmony && !hasNamed) return 1;
if(!hasNamespace && !hasNonHarmony && hasNamed) return 2;
if(!hasNamespace && !hasNonHarmony && !hasNamed) return 1;
return fakeMap;
}
getFakeMapInitStatement(fakeMap) {
return typeof fakeMap === "object" ? `var fakeMap = ${JSON.stringify(fakeMap, null, "\t")};` : "";
}
getReturn(type) {
if(type === 1) return "module";
if(type === 2) return "Object.assign({/* fake namespace object */}, module, { \"default\": module })";
if(type === 0) {
if(this.options.namespaceObject === "strict") {
return "/* fake namespace object */ { \"default\": module }";
} else {
return "(typeof module === \"object\" && module && module.__esModule ? module : /* fake namespace object */ { \"default\": module })";
}
}
}
getReturnModuleObjectSource(fakeMap, fakeMapDataExpression = "fakeMap[id]") {
if(typeof fakeMap === "number") return `return ${this.getReturn(fakeMap)};`;
return `return ${fakeMapDataExpression} === 1 ? ${this.getReturn(1)} : ${fakeMapDataExpression} ? ${this.getReturn(2)} : ${this.getReturn(0)};`;
}
getSyncSource(dependencies, id) {
const map = this.getUserRequestMap(dependencies);
const fakeMap = this.getFakeMap(dependencies);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackContext(req) {
var id = webpackContextResolve(req);
var module = __webpack_require__(id);
${returnModuleObject}
}
function webpackContextResolve(req) {
var id = map[req];
if(!(id + 1)) { // check for number or string
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return id;
}
webpackContext.keys = function webpackContextKeys() {
return Object.keys(map);
};
webpackContext.resolve = webpackContextResolve;
module.exports = webpackContext;
webpackContext.id = ${JSON.stringify(id)};`;
}
getWeakSyncSource(dependencies, id) {
const map = this.getUserRequestMap(dependencies);
const fakeMap = this.getFakeMap(dependencies);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackContext(req) {
var id = webpackContextResolve(req);
if(!__webpack_require__.m[id]) {
var e = new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
var module = __webpack_require__(id);
${returnModuleObject}
}
function webpackContextResolve(req) {
var id = map[req];
if(!(id + 1)) { // check for number or string
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return id;
}
webpackContext.keys = function webpackContextKeys() {
return Object.keys(map);
};
webpackContext.resolve = webpackContextResolve;
webpackContext.id = ${JSON.stringify(id)};
module.exports = webpackContext;`;
}
getAsyncWeakSource(dependencies, id) {
const map = this.getUserRequestMap(dependencies);
const fakeMap = this.getFakeMap(dependencies);
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap);
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(function(id) {
if(!__webpack_require__.m[id]) {
var e = new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
e.code = 'MODULE_NOT_FOUND';
throw e;
}
var module = __webpack_require__(id);
${returnModuleObject}
});
}
function webpackAsyncContextResolve(req) {
// Here Promise.resolve().then() is used instead of new Promise() to prevent
// uncatched exception popping up in devtools
return Promise.resolve().then(function() {
var id = map[req];
if(!(id + 1)) { // check for number or string
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return id;
});
}
webpackAsyncContext.keys = function webpackAsyncContextKeys() {
return Object.keys(map);
};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
getEagerSource(dependencies, id) {
const map = this.getUserRequestMap(dependencies);
const fakeMap = this.getFakeMap(dependencies);
const thenFunction = fakeMap !== 1 ?
`function(id) {
var module = __webpack_require__(id);
${this.getReturnModuleObjectSource(fakeMap)}
}` :
"__webpack_require__";
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(${thenFunction});
}
function webpackAsyncContextResolve(req) {
// Here Promise.resolve().then() is used instead of new Promise() to prevent
// uncatched exception popping up in devtools
return Promise.resolve().then(function() {
var id = map[req];
if(!(id + 1)) { // check for number or string
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return id;
});
}
webpackAsyncContext.keys = function webpackAsyncContextKeys() {
return Object.keys(map);
};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
getLazyOnceSource(block, dependencies, id, runtimeTemplate) {
const promise = runtimeTemplate.blockPromise({
block,
message: "lazy-once context"
});
const map = this.getUserRequestMap(dependencies);
const fakeMap = this.getFakeMap(dependencies);
const thenFunction = fakeMap !== 1 ?
`function(id) {
var module = __webpack_require__(id);
${this.getReturnModuleObjectSource(fakeMap)};
}` :
"__webpack_require__";
return `var map = ${JSON.stringify(map, null, "\t")};
${this.getFakeMapInitStatement(fakeMap)}
function webpackAsyncContext(req) {
return webpackAsyncContextResolve(req).then(${thenFunction});
}
function webpackAsyncContextResolve(req) {
return ${promise}.then(function() {
var id = map[req];
if(!(id + 1)) { // check for number or string
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
return id;
});
}
webpackAsyncContext.keys = function webpackAsyncContextKeys() {
return Object.keys(map);
};
webpackAsyncContext.resolve = webpackAsyncContextResolve;
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
getLazySource(blocks, id) {
let hasMultipleOrNoChunks = false;
const fakeMap = this.getFakeMap(blocks.map(b => b.dependencies[0]));
const map = blocks
.filter(block => block.dependencies[0].module)
.map((block) => ({
dependency: block.dependencies[0],
block: block,
userRequest: block.dependencies[0].userRequest
})).sort((a, b) => {
if(a.userRequest === b.userRequest) return 0;
return a.userRequest < b.userRequest ? -1 : 1;
}).reduce((map, item) => {
const chunks = item.block.chunkGroup && item.block.chunkGroup.chunks || [];
if(chunks.length !== 1) {
hasMultipleOrNoChunks = true;
}
const arrayStart = [item.dependency.module.id];
if(typeof fakeMap === "object")
arrayStart.push(fakeMap[item.dependency.module.id]);
map[item.userRequest] = arrayStart
.concat(chunks.map(chunk => chunk.id));
return map;
}, Object.create(null));
const chunksStartPosition = typeof fakeMap === "object" ? 2 : 1;
const requestPrefix = hasMultipleOrNoChunks ?
`Promise.all(ids.slice(${chunksStartPosition}).map(__webpack_require__.e))` :
`__webpack_require__.e(ids[${chunksStartPosition}])`;
const returnModuleObject = this.getReturnModuleObjectSource(fakeMap, "ids[1]");
return `var map = ${JSON.stringify(map, null, "\t")};
function webpackAsyncContext(req) {
var ids = map[req];
if(!ids) {
return Promise.resolve().then(function() {
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
});
}
return ${requestPrefix}.then(function() {
var module = __webpack_require__(ids[0]);
${returnModuleObject}
});
}
webpackAsyncContext.keys = function webpackAsyncContextKeys() {
return Object.keys(map);
};
webpackAsyncContext.id = ${JSON.stringify(id)};
module.exports = webpackAsyncContext;`;
}
getSourceForEmptyContext(id) {
return `function webpackEmptyContext(req) {
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
}
webpackEmptyContext.keys = function() { return []; };
webpackEmptyContext.resolve = webpackEmptyContext;
module.exports = webpackEmptyContext;
webpackEmptyContext.id = ${JSON.stringify(id)};`;
}
getSourceForEmptyAsyncContext(id) {
return `function webpackEmptyAsyncContext(req) {
// Here Promise.resolve().then() is used instead of new Promise() to prevent
// uncatched exception popping up in devtools
return Promise.resolve().then(function() {
var e = new Error('Cannot find module "' + req + '".');
e.code = 'MODULE_NOT_FOUND';
throw e;
});
}
webpackEmptyAsyncContext.keys = function() { return []; };
webpackEmptyAsyncContext.resolve = webpackEmptyAsyncContext;
module.exports = webpackEmptyAsyncContext;
webpackEmptyAsyncContext.id = ${JSON.stringify(id)};`;
}
getSourceString(asyncMode, runtimeTemplate) {
if(asyncMode === "lazy") {
if(this.blocks && this.blocks.length > 0) {
return this.getLazySource(this.blocks, this.id);
}
return this.getSourceForEmptyAsyncContext(this.id);
}
if(asyncMode === "eager") {
if(this.dependencies && this.dependencies.length > 0) {
return this.getEagerSource(this.dependencies, this.id);
}
return this.getSourceForEmptyAsyncContext(this.id);
}
if(asyncMode === "lazy-once") {
const block = this.blocks[0];
if(block) {
return this.getLazyOnceSource(block, block.dependencies, this.id, runtimeTemplate);
}
return this.getSourceForEmptyAsyncContext(this.id);
}
if(asyncMode === "async-weak") {
if(this.dependencies && this.dependencies.length > 0) {
return this.getAsyncWeakSource(this.dependencies, this.id);
}
return this.getSourceForEmptyAsyncContext(this.id);
}
if(asyncMode === "weak") {
if(this.dependencies && this.dependencies.length > 0) {
return this.getWeakSyncSource(this.dependencies, this.id);
}
}
if(this.dependencies && this.dependencies.length > 0) {
return this.getSyncSource(this.dependencies, this.id);
}
return this.getSourceForEmptyContext(this.id);
}
getSource(sourceString) {
if(this.useSourceMap) {
return new OriginalSource(sourceString, this.identifier());
}
return new RawSource(sourceString);
}
source(dependencyTemplates, runtimeTemplate) {
return this.getSource(
this.getSourceString(this.options.mode, runtimeTemplate)
);
}
size() {
// base penalty
const initialSize = 160;
// if we dont have dependencies we stop here.
return this.dependencies
.reduce((size, dependency) => size + 5 + dependency.userRequest.length, initialSize);
}
}
Object.defineProperty(ContextModule.prototype, "recursive", {
configurable: false,
get: util.deprecate(function() {
return this.options.recursive;
}, "ContextModule.recursive has been moved to ContextModule.options.recursive"),
set: util.deprecate(function(value) {
this.options.recursive = value;
}, "ContextModule.recursive has been moved to ContextModule.options.recursive")
});
Object.defineProperty(ContextModule.prototype, "regExp", {
configurable: false,
get: util.deprecate(function() {
return this.options.regExp;
}, "ContextModule.regExp has been moved to ContextModule.options.regExp"),
set: util.deprecate(function(value) {
this.options.regExp = value;
}, "ContextModule.regExp has been moved to ContextModule.options.regExp")
});
Object.defineProperty(ContextModule.prototype, "addon", {
configurable: false,
get: util.deprecate(function() {
return this.options.addon;
}, "ContextModule.addon has been moved to ContextModule.options.addon"),
set: util.deprecate(function(value) {
this.options.addon = value;
}, "ContextModule.addon has been moved to ContextModule.options.addon")
});
Object.defineProperty(ContextModule.prototype, "async", {
configurable: false,
get: util.deprecate(function() {
return this.options.mode;
}, "ContextModule.async has been moved to ContextModule.options.mode"),
set: util.deprecate(function(value) {
this.options.mode = value;
}, "ContextModule.async has been moved to ContextModule.options.mode")
});
Object.defineProperty(ContextModule.prototype, "chunkName", {
configurable: false,
get: util.deprecate(function() {
return this.options.chunkName;
}, "ContextModule.chunkName has been moved to ContextModule.options.chunkName"),
set: util.deprecate(function(value) {
this.options.chunkName = value;
}, "ContextModule.chunkName has been moved to ContextModule.options.chunkName")
});
module.exports = ContextModule;