1 files changed, 146 insertions, 0 deletions
diff --git a/node_modules/webpack/lib/FlagDependencyExportsPlugin.js b/node_modules/webpack/lib/FlagDependencyExportsPlugin.js
new file mode 100644
index 00000000..0aafb0b4
--- /dev/null
+++ b/node_modules/webpack/lib/FlagDependencyExportsPlugin.js
@@ -0,0 +1,146 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Queue = require("./util/Queue");
+
+const addToSet = (a, b) => {
+	let changed = false;
+	for (const item of b) {
+		if (!a.has(item)) {
+			a.add(item);
+			changed = true;
+		}
+	}
+	return changed;
+};
+
+class FlagDependencyExportsPlugin {
+	apply(compiler) {
+		compiler.hooks.compilation.tap(
+			"FlagDependencyExportsPlugin",
+			compilation => {
+				compilation.hooks.finishModules.tap(
+					"FlagDependencyExportsPlugin",
+					modules => {
+						const dependencies = new Map();
+
+						const queue = new Queue();
+
+						let module;
+						let moduleWithExports;
+						let moduleProvidedExports;
+
+						const processDependenciesBlock = depBlock => {
+							for (const dep of depBlock.dependencies) {
+								if (processDependency(dep)) return true;
+							}
+							for (const variable of depBlock.variables) {
+								for (const dep of variable.dependencies) {
+									if (processDependency(dep)) return true;
+								}
+							}
+							for (const block of depBlock.blocks) {
+								if (processDependenciesBlock(block)) return true;
+							}
+							return false;
+						};
+
+						const processDependency = dep => {
+							const exportDesc = dep.getExports && dep.getExports();
+							if (!exportDesc) return;
+							moduleWithExports = true;
+							const exports = exportDesc.exports;
+							// break early if it's only in the worst state
+							if (module.buildMeta.providedExports === true) {
+								return true;
+							}
+							// break if it should move to the worst state
+							if (exports === true) {
+								module.buildMeta.providedExports = true;
+								notifyDependencies();
+								return true;
+							}
+							// merge in new exports
+							if (Array.isArray(exports)) {
+								if (addToSet(moduleProvidedExports, exports)) {
+									notifyDependencies();
+								}
+							}
+							// store dependencies
+							const exportDeps = exportDesc.dependencies;
+							if (exportDeps) {
+								for (const exportDependency of exportDeps) {
+									// add dependency for this module
+									const set = dependencies.get(exportDependency);
+									if (set === undefined) {
+										dependencies.set(exportDependency, new Set([module]));
+									} else {
+										set.add(module);
+									}
+								}
+							}
+							return false;
+						};
+
+						const notifyDependencies = () => {
+							const deps = dependencies.get(module);
+							if (deps !== undefined) {
+								for (const dep of deps) {
+									queue.enqueue(dep);
+								}
+							}
+						};
+
+						// Start with all modules without provided exports
+						for (const module of modules) {
+							if (!module.buildMeta.providedExports) {
+								queue.enqueue(module);
+							}
+						}
+
+						while (queue.length > 0) {
+							module = queue.dequeue();
+
+							if (module.buildMeta.providedExports !== true) {
+								moduleWithExports =
+									module.buildMeta && module.buildMeta.exportsType;
+								moduleProvidedExports = Array.isArray(
+									module.buildMeta.providedExports
+								)
+									? new Set(module.buildMeta.providedExports)
+									: new Set();
+								processDependenciesBlock(module);
+								if (!moduleWithExports) {
+									module.buildMeta.providedExports = true;
+									notifyDependencies();
+								} else if (module.buildMeta.providedExports !== true) {
+									module.buildMeta.providedExports = Array.from(
+										moduleProvidedExports
+									);
+								}
+							}
+						}
+					}
+				);
+				const providedExportsCache = new WeakMap();
+				compilation.hooks.rebuildModule.tap(
+					"FlagDependencyExportsPlugin",
+					module => {
+						providedExportsCache.set(module, module.buildMeta.providedExports);
+					}
+				);
+				compilation.hooks.finishRebuildingModule.tap(
+					"FlagDependencyExportsPlugin",
+					module => {
+						module.buildMeta.providedExports = providedExportsCache.get(module);
+					}
+				);
+			}
+		);
+	}
+}
+
+module.exports = FlagDependencyExportsPlugin;