chushihua

node_modules/webpack/lib/FlagDependencyExportsPlugin.js

@@ -0,0 +1,101 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class FlagDependencyExportsPlugin {
+
+	apply(compiler) {
+		compiler.plugin("compilation", (compilation) => {
+			compilation.plugin("finish-modules", (modules) => {
+				const dependencies = Object.create(null);
+
+				let module;
+				let moduleWithExports;
+				let moduleProvidedExports;
+				const queue = modules.filter((m) => !m.providedExports);
+				for(let i = 0; i < queue.length; i++) {
+					module = queue[i];
+
+					if(module.providedExports !== true) {
+						moduleWithExports = module.meta && module.meta.harmonyModule;
+						moduleProvidedExports = Array.isArray(module.providedExports) ? new Set(module.providedExports) : new Set();
+						processDependenciesBlock(module);
+						if(!moduleWithExports) {
+							module.providedExports = true;
+							notifyDependencies();
+						} else if(module.providedExports !== true) {
+							module.providedExports = Array.from(moduleProvidedExports);
+						}
+					}
+				}
+
+				function processDependenciesBlock(depBlock) {
+					depBlock.dependencies.forEach((dep) => processDependency(dep));
+					depBlock.variables.forEach((variable) => {
+						variable.dependencies.forEach((dep) => processDependency(dep));
+					});
+					depBlock.blocks.forEach(processDependenciesBlock);
+				}
+
+				function processDependency(dep) {
+					const exportDesc = dep.getExports && dep.getExports();
+					if(!exportDesc) return;
+					moduleWithExports = true;
+					const exports = exportDesc.exports;
+					const exportDeps = exportDesc.dependencies;
+					if(exportDeps) {
+						exportDeps.forEach((dep) => {
+							const depIdent = dep.identifier();
+							// if this was not yet initialized
+							// initialize it as an array containing the module and stop
+							const array = dependencies[depIdent];
+							if(!array) {
+								dependencies[depIdent] = [module];
+								return;
+							}
+
+							// check if this module is known
+							// if not, add it to the dependencies for this identifier
+							if(array.indexOf(module) < 0)
+								array.push(module);
+						});
+					}
+					let changed = false;
+					if(module.providedExports !== true) {
+						if(exports === true) {
+							module.providedExports = true;
+							changed = true;
+						} else if(Array.isArray(exports)) {
+							changed = addToSet(moduleProvidedExports, exports);
+						}
+					}
+					if(changed) {
+						notifyDependencies();
+					}
+				}
+
+				function notifyDependencies() {
+					const deps = dependencies[module.identifier()];
+					if(deps) {
+						deps.forEach((dep) => queue.push(dep));
+					}
+				}
+			});
+
+			function addToSet(a, b) {
+				let changed = false;
+				b.forEach((item) => {
+					if(!a.has(item)) {
+						a.add(item);
+						changed = true;
+					}
+				});
+				return changed;
+			}
+		});
+	}
+}
+
+module.exports = FlagDependencyExportsPlugin;