chushihua

node_modules/webpack/lib/ContextModule.js

@@ -0,0 +1,431 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+const path = require("path");
+const Module = require("./Module");
+const OriginalSource = require("webpack-sources").OriginalSource;
+const RawSource = require("webpack-sources").RawSource;
+const AsyncDependenciesBlock = require("./AsyncDependenciesBlock");
+const DepBlockHelpers = require("./dependencies/DepBlockHelpers");
+const Template = require("./Template");
+
+class ContextModule extends Module {
+	constructor(resolveDependencies, context, recursive, regExp, addon, asyncMode, chunkName) {
+		super();
+		this.resolveDependencies = resolveDependencies;
+		this.context = context;
+		this.recursive = recursive;
+		this.regExp = regExp;
+		this.addon = addon;
+		this.async = asyncMode;
+		this.cacheable = true;
+		this.contextDependencies = [context];
+		this.built = false;
+		this.chunkName = chunkName;
+	}
+
+	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.async)
+			identifier += ` ${this.async}`;
+		if(!this.recursive)
+			identifier += " nonrecursive";
+		if(this.addon)
+			identifier += ` ${this.addon}`;
+		if(this.regExp)
+			identifier += ` ${this.regExp}`;
+
+		return identifier;
+	}
+
+	readableIdentifier(requestShortener) {
+		let identifier = requestShortener.shorten(this.context);
+		if(this.async)
+			identifier += ` ${this.async}`;
+		if(!this.recursive)
+			identifier += " nonrecursive";
+		if(this.addon)
+			identifier += ` ${requestShortener.shorten(this.addon)}`;
+		if(this.regExp)
+			identifier += ` ${this.prettyRegExp(this.regExp + "")}`;
+
+		return identifier;
+	}
+
+	libIdent(options) {
+		let identifier = this.contextify(options.context, this.context);
+		if(this.async)
+			identifier += ` ${this.async}`;
+		if(this.recursive)
+			identifier += " recursive";
+		if(this.addon)
+			identifier += ` ${this.contextify(options.context, this.addon)}`;
+		if(this.regExp)
+			identifier += ` ${this.prettyRegExp(this.regExp + "")}`;
+
+		return identifier;
+	}
+
+	needRebuild(fileTimestamps, contextTimestamps) {
+		const ts = contextTimestamps[this.context];
+		if(!ts) {
+			return true;
+		}
+
+		return ts >= this.builtTime;
+	}
+
+	unbuild() {
+		this.built = false;
+		super.unbuild();
+	}
+
+	build(options, compilation, resolver, fs, callback) {
+		this.built = true;
+		this.builtTime = Date.now();
+		this.resolveDependencies(fs, this.context, this.recursive, this.regExp, (err, dependencies) => {
+			if(err) return callback(err);
+
+			// Reset children
+			this.dependencies = [];
+			this.blocks = [];
+
+			// 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.addon + dep.request;
+			});
+
+			if(!this.async || this.async === "eager") {
+
+				// if we have an sync or eager context
+				// just add all dependencies and continue
+				this.dependencies = dependencies;
+
+			} else if(this.async === "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.chunkName, this);
+					dependencies.forEach(dep => {
+						block.addDependency(dep);
+					});
+					this.addBlock(block);
+				}
+
+			} else if(this.async === "weak" || this.async === "async-weak") {
+
+				// we mark all dependencies as weak
+				dependencies.forEach(dep => dep.weak = true);
+				this.dependencies = dependencies;
+
+			} else {
+				// 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.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);
+					block.addDependency(dep);
+					this.addBlock(block);
+				});
+			}
+			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(function(map, dep) {
+				map[dep.userRequest] = dep.module.id;
+				return map;
+			}, Object.create(null));
+	}
+
+	getSyncSource(dependencies, id) {
+		const map = this.getUserRequestMap(dependencies);
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackContext(req) {
+	return __webpack_require__(webpackContextResolve(req));
+};
+function webpackContextResolve(req) {
+	var id = map[req];
+	if(!(id + 1)) // check for number or string
+		throw new Error("Cannot find module '" + req + "'.");
+	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);
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackContext(req) {
+	var id = webpackContextResolve(req);
+	if(!__webpack_require__.m[id])
+		throw new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
+	return __webpack_require__(id);
+};
+function webpackContextResolve(req) {
+	var id = map[req];
+	if(!(id + 1)) // check for number or string
+		throw new Error("Cannot find module '" + req + "'.");
+	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);
+
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackAsyncContext(req) {
+	return webpackAsyncContextResolve(req).then(function(id) {
+		if(!__webpack_require__.m[id])
+			throw new Error("Module '" + req + "' ('" + id + "') is not available (weak dependency)");
+		return __webpack_require__(id);
+	});
+};
+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
+			throw new Error("Cannot find module '" + req + "'.");
+		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);
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackAsyncContext(req) {
+	return webpackAsyncContextResolve(req).then(__webpack_require__);
+};
+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
+			throw new Error("Cannot find module '" + req + "'.");
+		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, outputOptions, requestShortener) {
+		const promise = DepBlockHelpers.getDepBlockPromise(block, outputOptions, requestShortener, "lazy-once context");
+		const map = this.getUserRequestMap(dependencies);
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackAsyncContext(req) {
+	return webpackAsyncContextResolve(req).then(__webpack_require__);
+};
+function webpackAsyncContextResolve(req) {
+	return ${promise}.then(function() {
+		var id = map[req];
+		if(!(id + 1)) // check for number or string
+			throw new Error("Cannot find module '" + req + "'.");
+		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 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.chunks || [];
+				if(chunks.length !== 1) {
+					hasMultipleOrNoChunks = true;
+				}
+				map[item.userRequest] = [item.dependency.module.id]
+					.concat(chunks.map(chunk => chunk.id));
+
+				return map;
+			}, Object.create(null));
+
+		const requestPrefix = hasMultipleOrNoChunks ?
+			"Promise.all(ids.slice(1).map(__webpack_require__.e))" :
+			"__webpack_require__.e(ids[1])";
+
+		return `var map = ${JSON.stringify(map, null, "\t")};
+function webpackAsyncContext(req) {
+	var ids = map[req];
+	if(!ids)
+		return Promise.reject(new Error("Cannot find module '" + req + "'."));
+	return ${requestPrefix}.then(function() {
+		return __webpack_require__(ids[0]);
+	});
+};
+webpackAsyncContext.keys = function webpackAsyncContextKeys() {
+	return Object.keys(map);
+};
+webpackAsyncContext.id = ${JSON.stringify(id)};
+module.exports = webpackAsyncContext;`;
+	}
+
+	getSourceForEmptyContext(id) {
+		return `function webpackEmptyContext(req) {
+	throw new Error("Cannot find module '" + req + "'.");
+}
+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() {
+		throw new Error("Cannot find module '" + req + "'.");
+	});
+}
+webpackEmptyAsyncContext.keys = function() { return []; };
+webpackEmptyAsyncContext.resolve = webpackEmptyAsyncContext;
+module.exports = webpackEmptyAsyncContext;
+webpackEmptyAsyncContext.id = ${JSON.stringify(id)};`;
+	}
+
+	getSourceString(asyncMode, outputOptions, requestShortener) {
+		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, outputOptions, requestShortener);
+			}
+			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, outputOptions, requestShortener) {
+		return this.getSource(
+			this.getSourceString(this.async, outputOptions, requestShortener)
+		);
+	}
+
+	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);
+	}
+}
+
+module.exports = ContextModule;