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1 files changed, 46 insertions, 0 deletions

diff --git a/node_modules/tapable/lib/AsyncSeriesWaterfallHook.js b/node_modules/tapable/lib/AsyncSeriesWaterfallHook.js
new file mode 100644
index 00000000..d5532bf5
--- /dev/null
+++ b/node_modules/tapable/lib/AsyncSeriesWaterfallHook.js
@@ -0,0 +1,46 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+const Hook = require("./Hook");
+const HookCodeFactory = require("./HookCodeFactory");
+
+class AsyncSeriesWaterfallHookCodeFactory extends HookCodeFactory {
+	content({ onError, onResult, onDone }) {
+		return this.callTapsSeries({
+			onError: (i, err, next, doneBreak) => onError(err) + doneBreak(true),
+			onResult: (i, result, next) => {
+				let code = "";
+				code += `if(${result} !== undefined) {\n`;
+				code += `${this._args[0]} = ${result};\n`;
+				code += `}\n`;
+				code += next();
+				return code;
+			},
+			onDone: () => onResult(this._args[0])
+		});
+	}
+}
+
+const factory = new AsyncSeriesWaterfallHookCodeFactory();
+
+class AsyncSeriesWaterfallHook extends Hook {
+	constructor(args) {
+		super(args);
+		if (args.length < 1)
+			throw new Error("Waterfall hooks must have at least one argument");
+	}
+
+	compile(options) {
+		factory.setup(this, options);
+		return factory.create(options);
+	}
+}
+
+Object.defineProperties(AsyncSeriesWaterfallHook.prototype, {
+	_call: { value: undefined, configurable: true, writable: true }
+});
+
+module.exports = AsyncSeriesWaterfallHook;