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/*! *****************************************************************************
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) {
try {
fs.statSync(name);
return true;
}
catch (e) {
return false;
}
}
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;
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