--- /dev/null
+/*! *****************************************************************************
+Copyright (c) Microsoft Corporation. All rights reserved.
+Licensed under the Apache License, Version 2.0 (the "License"); you may not use
+this file except in compliance with the License. You may obtain a copy of the
+License at http://www.apache.org/licenses/LICENSE-2.0
+
+THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
+WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
+MERCHANTABLITY OR NON-INFRINGEMENT.
+
+See the Apache Version 2.0 License for specific language governing permissions
+and limitations under the License.
+***************************************************************************** */
+
+
+"use strict";
+var fs = require("fs");
+function pipeExists(name) {
+ return fs.existsSync(name);
+}
+function createCancellationToken(args) {
+ var cancellationPipeName;
+ for (var i = 0; i < args.length - 1; i++) {
+ if (args[i] === "--cancellationPipeName") {
+ cancellationPipeName = args[i + 1];
+ break;
+ }
+ }
+ if (!cancellationPipeName) {
+ return {
+ isCancellationRequested: function () { return false; },
+ setRequest: function (_requestId) { return void 0; },
+ resetRequest: function (_requestId) { return void 0; }
+ };
+ }
+ if (cancellationPipeName.charAt(cancellationPipeName.length - 1) === "*") {
+ var namePrefix_1 = cancellationPipeName.slice(0, -1);
+ if (namePrefix_1.length === 0 || namePrefix_1.indexOf("*") >= 0) {
+ throw new Error("Invalid name for template cancellation pipe: it should have length greater than 2 characters and contain only one '*'.");
+ }
+ var perRequestPipeName_1;
+ var currentRequestId_1;
+ return {
+ isCancellationRequested: function () { return perRequestPipeName_1 !== undefined && pipeExists(perRequestPipeName_1); },
+ setRequest: function (requestId) {
+ currentRequestId_1 = requestId;
+ perRequestPipeName_1 = namePrefix_1 + requestId;
+ },
+ resetRequest: function (requestId) {
+ if (currentRequestId_1 !== requestId) {
+ throw new Error("Mismatched request id, expected " + currentRequestId_1 + ", actual " + requestId);
+ }
+ perRequestPipeName_1 = undefined;
+ }
+ };
+ }
+ else {
+ return {
+ isCancellationRequested: function () { return pipeExists(cancellationPipeName); },
+ setRequest: function (_requestId) { return void 0; },
+ resetRequest: function (_requestId) { return void 0; }
+ };
+ }
+}
+module.exports = createCancellationToken;
+//# sourceMappingURL=cancellationToken.js.map
\ No newline at end of file