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1/*! *****************************************************************************
2Copyright (c) Microsoft Corporation. All rights reserved.
3Licensed under the Apache License, Version 2.0 (the "License"); you may not use
4this file except in compliance with the License. You may obtain a copy of the
5License at http://www.apache.org/licenses/LICENSE-2.0
6
7THIS CODE IS PROVIDED ON AN *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
8KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED
9WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE,
10MERCHANTABLITY OR NON-INFRINGEMENT.
11
12See the Apache Version 2.0 License for specific language governing permissions
13and limitations under the License.
14***************************************************************************** */
15
16
17"use strict";
18var fs = require("fs");
19function pipeExists(name) {
20    return fs.existsSync(name);
21}
22function createCancellationToken(args) {
23    var cancellationPipeName;
24    for (var i = 0; i < args.length - 1; i++) {
25        if (args[i] === "--cancellationPipeName") {
26            cancellationPipeName = args[i + 1];
27            break;
28        }
29    }
30    if (!cancellationPipeName) {
31        return {
32            isCancellationRequested: function () { return false; },
33            setRequest: function (_requestId) { return void 0; },
34            resetRequest: function (_requestId) { return void 0; }
35        };
36    }
37    if (cancellationPipeName.charAt(cancellationPipeName.length - 1) === "*") {
38        var namePrefix_1 = cancellationPipeName.slice(0, -1);
39        if (namePrefix_1.length === 0 || namePrefix_1.indexOf("*") >= 0) {
40            throw new Error("Invalid name for template cancellation pipe: it should have length greater than 2 characters and contain only one '*'.");
41        }
42        var perRequestPipeName_1;
43        var currentRequestId_1;
44        return {
45            isCancellationRequested: function () { return perRequestPipeName_1 !== undefined && pipeExists(perRequestPipeName_1); },
46            setRequest: function (requestId) {
47                currentRequestId_1 = requestId;
48                perRequestPipeName_1 = namePrefix_1 + requestId;
49            },
50            resetRequest: function (requestId) {
51                if (currentRequestId_1 !== requestId) {
52                    throw new Error("Mismatched request id, expected " + currentRequestId_1 + ", actual " + requestId);
53                }
54                perRequestPipeName_1 = undefined;
55            }
56        };
57    }
58    else {
59        return {
60            isCancellationRequested: function () { return pipeExists(cancellationPipeName); },
61            setRequest: function (_requestId) { return void 0; },
62            resetRequest: function (_requestId) { return void 0; }
63        };
64    }
65}
66module.exports = createCancellationToken;
67//# sourceMappingURL=cancellationToken.js.map