fork-ts-checker-webpack-plugin-alt/lib/CancellationToken.js

Runs typescript type checker and linter on separate process.

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var crypto = require("crypto");
var fs = require("fs");
var os = require("os");
var path = require("path");
var OperationCanceledException_1 = require("./OperationCanceledException");
var CancellationToken = /** @class */ (function () {
    function CancellationToken(cancellationFileName, isCancelled) {
        this.isCancelled = !!isCancelled;
        this.cancellationFileName =
            cancellationFileName || crypto.randomBytes(64).toString('hex');
        this.lastCancellationCheckTime = 0;
    }
    CancellationToken.createFromJSON = function (json) {
        return new CancellationToken(json.cancellationFileName, json.isCancelled);
    };
    CancellationToken.prototype.toJSON = function () {
        return {
            cancellationFileName: this.cancellationFileName,
            isCancelled: this.isCancelled
        };
    };
    CancellationToken.prototype.getCancellationFilePath = function () {
        return path.join(os.tmpdir(), this.cancellationFileName);
    };
    CancellationToken.prototype.isCancellationRequested = function () {
        if (this.isCancelled) {
            return true;
        }
        var time = Date.now();
        var duration = Math.abs(time - this.lastCancellationCheckTime);
        if (duration > 10) {
            // check no more than once every 10ms
            this.lastCancellationCheckTime = time;
            this.isCancelled = fs.existsSync(this.getCancellationFilePath());
        }
        return this.isCancelled;
    };
    CancellationToken.prototype.throwIfCancellationRequested = function () {
        if (this.isCancellationRequested()) {
            throw new OperationCanceledException_1.OperationCanceledException();
        }
    };
    CancellationToken.prototype.requestCancellation = function () {
        fs.writeFileSync(this.getCancellationFilePath(), '');
        this.isCancelled = true;
    };
    CancellationToken.prototype.cleanupCancellation = function () {
        if (this.isCancelled && fs.existsSync(this.getCancellationFilePath())) {
            fs.unlinkSync(this.getCancellationFilePath());
            this.isCancelled = false;
        }
    };
    return CancellationToken;
}());
exports.CancellationToken = CancellationToken;