async function findNewlyLaunchedChromeProcess()

in src/chromeDebugAdapter.ts [628:674]
30 lines of code
6 McCabe index (conditional complexity)

async function findNewlyLaunchedChromeProcess(semaphoreFile: string): Promise<string> {
    const regexPattern = /processid\s+=\s+(\d+)\s*;/i;
    let lastAccessFileContent: string;
    for (let i = 0 ; i < 25; i++) {
        if (fs.existsSync(semaphoreFile)) {
            lastAccessFileContent = fs.readFileSync(semaphoreFile, {
                encoding: 'utf16le'
            }).toString();

            const lines = lastAccessFileContent.split('\n');

            const matchedLines = (lines || []).filter(line => line.match(regexPattern));
            if (matchedLines.length > 1) {
                throw new Error(`Unexpected semaphore file format ${lines}`);
            }

            if (matchedLines.length === 1) {
                const match = matchedLines[0].match(regexPattern);
                return match[1];
            }
            // else == 0, wait for 200 ms delay and try again.
        }
        await new Promise<void>((resolve) => {
            setTimeout(resolve, 200);
        });
    }

    const error = new Error(`Cannot acquire Chrome process id`);
    let telemetryProperties: any = {
        semaphoreFileContent: lastAccessFileContent
    };

    coreUtils.fillErrorDetails(telemetryProperties, error);

    /* __GDPR__
       "error" : {
          "semaphoreFileContent" : { "classification": "SystemMetaData", "purpose": "FeatureInsight" },
          "${include}": [
              "${IExecutionResultTelemetryProperties}",
              "${DebugCommonProperties}"
            ]
       }
     */
    telemetry.telemetry.reportEvent('error', telemetryProperties);

    return null;
}