* circumstances.
     */
    public static void main(String[] args) throws IOException {
        int exitCode = new MavenUpCling().run(args, null, null, null, false);
        System.exit(exitCode);
    }

    /**
     * ClassWorld Launcher "enhanced" entry point: returning exitCode and accepts Class World.
     */
    public static int main(String[] args, ClassWorld world) throws IOException {

        ExecResult r = exec(cmd);
        if (r.exitCode != 0) {
            throw new AssertionError(String.join(" ", cmd) + " failed: " + r);
        }
        return r.stdout;
    }

    private static final class ExecResult {
        final int exitCode;
        final String stdout;
        final String stderr;

        ExecResult(int exitCode, String stdout, String stderr) {

     * circumstances.
     */
    public static void main(String[] args) throws IOException {
        int exitCode = new MavenEncCling().run(args, null, null, null, false);
        System.exit(exitCode);
    }

    /**
     * ClassWorld Launcher "enhanced" entry point: returning exitCode and accepts Class World.
     */
    public static int main(String[] args, ClassWorld world) throws IOException {

     * circumstances.
     */
    public static void main(String[] args) throws IOException {
        int exitCode = new MavenShellCling().run(args, null, null, null, false);
        System.exit(exitCode);
    }

    /**
     * ClassWorld Launcher "enhanced" entry point: returning exitCode and accepts Class World.
     */
    public static int main(String[] args, ClassWorld world) throws IOException {

        }
        return r.stdout();
    }

    private record ExecResult(
        int exitCode,
        String stdout,
        String stderr
    ) {
        @Override
        public String toString() {
            return "exitCode=" + exitCode + ", stdout=" + summarize(stdout) + ", stderr=" + summarize(stderr);
        }

        private static String summarize(String s) {

            }
            exitCode = 0;
        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("ThumbnailGenerator is stopped.", e);
            } else if (logger.isInfoEnabled()) {
                logger.info("ThumbnailGenerator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {

     */
    public static final class ExitException extends InvokerException {
        private final int exitCode;

        public ExitException(int exitCode) {
            super("EXIT=" + exitCode);
            this.exitCode = exitCode;
        }

        public int getExitCode() {
            return exitCode;
        }
    }

                    out.start();
                    err.start();
                    int exitCode = process.waitFor();
                    out.join();
                    err.join();
                    if (exitCode != 0) {
                        shellContext.logger.error("Shell command exited with code " + exitCode);
                    }
                } catch (Exception e) {
                    saveException(e);

            }

            exitCode = process(options);
        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("Crawler is stopped.", e);
            } else if (logger.isInfoEnabled()) {
                logger.info("Crawler is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {

            // Destroy the process
            int exitCode = processHelper.destroyProcess(sessionId);
            assertFalse(processHelper.isProcessRunning(sessionId));

            // Exit code should be non-zero for forcibly destroyed process, or -1
            assertTrue(exitCode != 0 || exitCode == -1);
        } catch (Exception e) {
            fail("Unexpected exception: " + e.getMessage());