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1 files changed, 468 insertions, 0 deletions

diff --git a/node_modules/tapable/lib/HookCodeFactory.js b/node_modules/tapable/lib/HookCodeFactory.js
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+++ b/node_modules/tapable/lib/HookCodeFactory.js
@@ -0,0 +1,468 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class HookCodeFactory {
+	constructor(config) {
+		this.config = config;
+		this.options = undefined;
+		this._args = undefined;
+	}
+
+	create(options) {
+		this.init(options);
+		let fn;
+		switch (this.options.type) {
+			case "sync":
+				fn = new Function(
+					this.args(),
+					'"use strict";\n' +
+						this.header() +
+						this.contentWithInterceptors({
+							onError: err => `throw ${err};\n`,
+							onResult: result => `return ${result};\n`,
+							resultReturns: true,
+							onDone: () => "",
+							rethrowIfPossible: true
+						})
+				);
+				break;
+			case "async":
+				fn = new Function(
+					this.args({
+						after: "_callback"
+					}),
+					'"use strict";\n' +
+						this.header() +
+						this.contentWithInterceptors({
+							onError: err => `_callback(${err});\n`,
+							onResult: result => `_callback(null, ${result});\n`,
+							onDone: () => "_callback();\n"
+						})
+				);
+				break;
+			case "promise":
+				let errorHelperUsed = false;
+				const content = this.contentWithInterceptors({
+					onError: err => {
+						errorHelperUsed = true;
+						return `_error(${err});\n`;
+					},
+					onResult: result => `_resolve(${result});\n`,
+					onDone: () => "_resolve();\n"
+				});
+				let code = "";
+				code += '"use strict";\n';
+				code += this.header();
+				code += "return new Promise((function(_resolve, _reject) {\n";
+				if (errorHelperUsed) {
+					code += "var _sync = true;\n";
+					code += "function _error(_err) {\n";
+					code += "if(_sync)\n";
+					code +=
+						"_resolve(Promise.resolve().then((function() { throw _err; })));\n";
+					code += "else\n";
+					code += "_reject(_err);\n";
+					code += "};\n";
+				}
+				code += content;
+				if (errorHelperUsed) {
+					code += "_sync = false;\n";
+				}
+				code += "}));\n";
+				fn = new Function(this.args(), code);
+				break;
+		}
+		this.deinit();
+		return fn;
+	}
+
+	setup(instance, options) {
+		instance._x = options.taps.map(t => t.fn);
+	}
+
+	/**
+	 * @param {{ type: "sync" | "promise" | "async", taps: Array<Tap>, interceptors: Array<Interceptor> }} options
+	 */
+	init(options) {
+		this.options = options;
+		this._args = options.args.slice();
+	}
+
+	deinit() {
+		this.options = undefined;
+		this._args = undefined;
+	}
+
+	contentWithInterceptors(options) {
+		if (this.options.interceptors.length > 0) {
+			const onError = options.onError;
+			const onResult = options.onResult;
+			const onDone = options.onDone;
+			let code = "";
+			for (let i = 0; i < this.options.interceptors.length; i++) {
+				const interceptor = this.options.interceptors[i];
+				if (interceptor.call) {
+					code += `${this.getInterceptor(i)}.call(${this.args({
+						before: interceptor.context ? "_context" : undefined
+					})});\n`;
+				}
+			}
+			code += this.content(
+				Object.assign(options, {
+					onError:
+						onError &&
+						(err => {
+							let code = "";
+							for (let i = 0; i < this.options.interceptors.length; i++) {
+								const interceptor = this.options.interceptors[i];
+								if (interceptor.error) {
+									code += `${this.getInterceptor(i)}.error(${err});\n`;
+								}
+							}
+							code += onError(err);
+							return code;
+						}),
+					onResult:
+						onResult &&
+						(result => {
+							let code = "";
+							for (let i = 0; i < this.options.interceptors.length; i++) {
+								const interceptor = this.options.interceptors[i];
+								if (interceptor.result) {
+									code += `${this.getInterceptor(i)}.result(${result});\n`;
+								}
+							}
+							code += onResult(result);
+							return code;
+						}),
+					onDone:
+						onDone &&
+						(() => {
+							let code = "";
+							for (let i = 0; i < this.options.interceptors.length; i++) {
+								const interceptor = this.options.interceptors[i];
+								if (interceptor.done) {
+									code += `${this.getInterceptor(i)}.done();\n`;
+								}
+							}
+							code += onDone();
+							return code;
+						})
+				})
+			);
+			return code;
+		} else {
+			return this.content(options);
+		}
+	}
+
+	header() {
+		let code = "";
+		if (this.needContext()) {
+			code += "var _context = {};\n";
+		} else {
+			code += "var _context;\n";
+		}
+		code += "var _x = this._x;\n";
+		if (this.options.interceptors.length > 0) {
+			code += "var _taps = this.taps;\n";
+			code += "var _interceptors = this.interceptors;\n";
+		}
+		return code;
+	}
+
+	needContext() {
+		for (const tap of this.options.taps) if (tap.context) return true;
+		return false;
+	}
+
+	callTap(tapIndex, { onError, onResult, onDone, rethrowIfPossible }) {
+		let code = "";
+		let hasTapCached = false;
+		for (let i = 0; i < this.options.interceptors.length; i++) {
+			const interceptor = this.options.interceptors[i];
+			if (interceptor.tap) {
+				if (!hasTapCached) {
+					code += `var _tap${tapIndex} = ${this.getTap(tapIndex)};\n`;
+					hasTapCached = true;
+				}
+				code += `${this.getInterceptor(i)}.tap(${
+					interceptor.context ? "_context, " : ""
+				}_tap${tapIndex});\n`;
+			}
+		}
+		code += `var _fn${tapIndex} = ${this.getTapFn(tapIndex)};\n`;
+		const tap = this.options.taps[tapIndex];
+		switch (tap.type) {
+			case "sync":
+				if (!rethrowIfPossible) {
+					code += `var _hasError${tapIndex} = false;\n`;
+					code += "try {\n";
+				}
+				if (onResult) {
+					code += `var _result${tapIndex} = _fn${tapIndex}(${this.args({
+						before: tap.context ? "_context" : undefined
+					})});\n`;
+				} else {
+					code += `_fn${tapIndex}(${this.args({
+						before: tap.context ? "_context" : undefined
+					})});\n`;
+				}
+				if (!rethrowIfPossible) {
+					code += "} catch(_err) {\n";
+					code += `_hasError${tapIndex} = true;\n`;
+					code += onError("_err");
+					code += "}\n";
+					code += `if(!_hasError${tapIndex}) {\n`;
+				}
+				if (onResult) {
+					code += onResult(`_result${tapIndex}`);
+				}
+				if (onDone) {
+					code += onDone();
+				}
+				if (!rethrowIfPossible) {
+					code += "}\n";
+				}
+				break;
+			case "async":
+				let cbCode = "";
+				if (onResult)
+					cbCode += `(function(_err${tapIndex}, _result${tapIndex}) {\n`;
+				else cbCode += `(function(_err${tapIndex}) {\n`;
+				cbCode += `if(_err${tapIndex}) {\n`;
+				cbCode += onError(`_err${tapIndex}`);
+				cbCode += "} else {\n";
+				if (onResult) {
+					cbCode += onResult(`_result${tapIndex}`);
+				}
+				if (onDone) {
+					cbCode += onDone();
+				}
+				cbCode += "}\n";
+				cbCode += "})";
+				code += `_fn${tapIndex}(${this.args({
+					before: tap.context ? "_context" : undefined,
+					after: cbCode
+				})});\n`;
+				break;
+			case "promise":
+				code += `var _hasResult${tapIndex} = false;\n`;
+				code += `var _promise${tapIndex} = _fn${tapIndex}(${this.args({
+					before: tap.context ? "_context" : undefined
+				})});\n`;
+				code += `if (!_promise${tapIndex} || !_promise${tapIndex}.then)\n`;
+				code += `  throw new Error('Tap function (tapPromise) did not return promise (returned ' + _promise${tapIndex} + ')');\n`;
+				code += `_promise${tapIndex}.then((function(_result${tapIndex}) {\n`;
+				code += `_hasResult${tapIndex} = true;\n`;
+				if (onResult) {
+					code += onResult(`_result${tapIndex}`);
+				}
+				if (onDone) {
+					code += onDone();
+				}
+				code += `}), function(_err${tapIndex}) {\n`;
+				code += `if(_hasResult${tapIndex}) throw _err${tapIndex};\n`;
+				code += onError(`_err${tapIndex}`);
+				code += "});\n";
+				break;
+		}
+		return code;
+	}
+
+	callTapsSeries({
+		onError,
+		onResult,
+		resultReturns,
+		onDone,
+		doneReturns,
+		rethrowIfPossible
+	}) {
+		if (this.options.taps.length === 0) return onDone();
+		const firstAsync = this.options.taps.findIndex(t => t.type !== "sync");
+		const somethingReturns = resultReturns || doneReturns;
+		let code = "";
+		let current = onDone;
+		let unrollCounter = 0;
+		for (let j = this.options.taps.length - 1; j >= 0; j--) {
+			const i = j;
+			const unroll =
+				current !== onDone &&
+				(this.options.taps[i].type !== "sync" || unrollCounter++ > 20);
+			if (unroll) {
+				unrollCounter = 0;
+				code += `function _next${i}() {\n`;
+				code += current();
+				code += `}\n`;
+				current = () => `${somethingReturns ? "return " : ""}_next${i}();\n`;
+			}
+			const done = current;
+			const doneBreak = skipDone => {
+				if (skipDone) return "";
+				return onDone();
+			};
+			const content = this.callTap(i, {
+				onError: error => onError(i, error, done, doneBreak),
+				onResult:
+					onResult &&
+					(result => {
+						return onResult(i, result, done, doneBreak);
+					}),
+				onDone: !onResult && done,
+				rethrowIfPossible:
+					rethrowIfPossible && (firstAsync < 0 || i < firstAsync)
+			});
+			current = () => content;
+		}
+		code += current();
+		return code;
+	}
+
+	callTapsLooping({ onError, onDone, rethrowIfPossible }) {
+		if (this.options.taps.length === 0) return onDone();
+		const syncOnly = this.options.taps.every(t => t.type === "sync");
+		let code = "";
+		if (!syncOnly) {
+			code += "var _looper = (function() {\n";
+			code += "var _loopAsync = false;\n";
+		}
+		code += "var _loop;\n";
+		code += "do {\n";
+		code += "_loop = false;\n";
+		for (let i = 0; i < this.options.interceptors.length; i++) {
+			const interceptor = this.options.interceptors[i];
+			if (interceptor.loop) {
+				code += `${this.getInterceptor(i)}.loop(${this.args({
+					before: interceptor.context ? "_context" : undefined
+				})});\n`;
+			}
+		}
+		code += this.callTapsSeries({
+			onError,
+			onResult: (i, result, next, doneBreak) => {
+				let code = "";
+				code += `if(${result} !== undefined) {\n`;
+				code += "_loop = true;\n";
+				if (!syncOnly) code += "if(_loopAsync) _looper();\n";
+				code += doneBreak(true);
+				code += `} else {\n`;
+				code += next();
+				code += `}\n`;
+				return code;
+			},
+			onDone:
+				onDone &&
+				(() => {
+					let code = "";
+					code += "if(!_loop) {\n";
+					code += onDone();
+					code += "}\n";
+					return code;
+				}),
+			rethrowIfPossible: rethrowIfPossible && syncOnly
+		});
+		code += "} while(_loop);\n";
+		if (!syncOnly) {
+			code += "_loopAsync = true;\n";
+			code += "});\n";
+			code += "_looper();\n";
+		}
+		return code;
+	}
+
+	callTapsParallel({
+		onError,
+		onResult,
+		onDone,
+		rethrowIfPossible,
+		onTap = (i, run) => run()
+	}) {
+		if (this.options.taps.length <= 1) {
+			return this.callTapsSeries({
+				onError,
+				onResult,
+				onDone,
+				rethrowIfPossible
+			});
+		}
+		let code = "";
+		code += "do {\n";
+		code += `var _counter = ${this.options.taps.length};\n`;
+		if (onDone) {
+			code += "var _done = (function() {\n";
+			code += onDone();
+			code += "});\n";
+		}
+		for (let i = 0; i < this.options.taps.length; i++) {
+			const done = () => {
+				if (onDone) return "if(--_counter === 0) _done();\n";
+				else return "--_counter;";
+			};
+			const doneBreak = skipDone => {
+				if (skipDone || !onDone) return "_counter = 0;\n";
+				else return "_counter = 0;\n_done();\n";
+			};
+			code += "if(_counter <= 0) break;\n";
+			code += onTap(
+				i,
+				() =>
+					this.callTap(i, {
+						onError: error => {
+							let code = "";
+							code += "if(_counter > 0) {\n";
+							code += onError(i, error, done, doneBreak);
+							code += "}\n";
+							return code;
+						},
+						onResult:
+							onResult &&
+							(result => {
+								let code = "";
+								code += "if(_counter > 0) {\n";
+								code += onResult(i, result, done, doneBreak);
+								code += "}\n";
+								return code;
+							}),
+						onDone:
+							!onResult &&
+							(() => {
+								return done();
+							}),
+						rethrowIfPossible
+					}),
+				done,
+				doneBreak
+			);
+		}
+		code += "} while(false);\n";
+		return code;
+	}
+
+	args({ before, after } = {}) {
+		let allArgs = this._args;
+		if (before) allArgs = [before].concat(allArgs);
+		if (after) allArgs = allArgs.concat(after);
+		if (allArgs.length === 0) {
+			return "";
+		} else {
+			return allArgs.join(", ");
+		}
+	}
+
+	getTapFn(idx) {
+		return `_x[${idx}]`;
+	}
+
+	getTap(idx) {
+		return `_taps[${idx}]`;
+	}
+
+	getInterceptor(idx) {
+		return `_interceptors[${idx}]`;
+	}
+}
+
+module.exports = HookCodeFactory;