Function spawnChildProcess

Extension/src/Debugger/nativeAttach.ts:169–264

(command: string, token?: vscode.CancellationToken)

}

function spawnChildProcess(command: string, token?: vscode.CancellationToken): Promise<string> {
    return new Promise<string>((resolve, reject) => {
        const process: child_process.ChildProcess = child_process.spawn(command, { shell: true });
        let stdout: string = "";
        let stderr: string = "";

        if (process) {
            let cancellationTokenListener: vscode.Disposable | undefined; // eslint-disable-line prefer-const
            // Handle timeout
            const seconds: number = 30;
            const processTimeout: NodeJS.Timeout = setTimeout(() => {
                process.removeAllListeners();
                if (cancellationTokenListener) {
                    cancellationTokenListener.dispose();
                }

                try {
                    process.kill();
                } catch {
                    // Failed to kill process.
                }
                reject(new Error(localize("timeout.processList.spawn", '"{0}" timed out after {1} seconds.', command, seconds)));
                return;
            }, seconds * 1000);

            // Handle cancellation
            cancellationTokenListener = token?.onCancellationRequested(() => {
                clearTimeout(processTimeout);
                process.removeAllListeners();

                try {
                    process.kill();
                } catch {
                    // Failed to kill process.
                }
                reject(new Error(localize("cancel.processList.spawn", '"{0}" canceled.', command)));
                return;
            });

            const cleanUpCallbacks = () => {
                clearTimeout(processTimeout);
                process.removeAllListeners();
                if (cancellationTokenListener) {
                    cancellationTokenListener.dispose();
                }
            };

            // Handle data streams
            if (process.stdout) {
                process.stdout.on('data', (data: string) => {
                    stdout += data.toString();
                });
            }

            if (process.stderr) {
                process.stderr.on('data', (data: string) => {
                    stderr += data.toString();
                });