如何捕获从shell脚本抛出的错误并在groovy中显示它？

Question

我基本上尝试建立到Linux机器的SSH连接，并在我的groovy脚本中执行shell命令，如下所示：

#!groovy

def serverName51 = "********"
def folderName = "tmp"
node('linux') {
    def output = sh returnStdout: true, script:"ssh -q karthik@${serverName51} 'cd /tmp; mkdir ${folderName};'"
}

上面的代码返回一条错误消息，如下所示：

ERROR: script returned exit code 255

我知道shell脚本执行时会抛出一些错误。 如何在groovy中捕获并显示此错误？

Answer 1

所以你在这里向我们展示了一个执行shell脚本的dsl？

在DSL的内部，您必须创建一个Process对象。我直接使用java.lang.ProcessBuilder。

明确：

Process process=new ProcessBuilder().directory(workingDir).command(["sh", "ls -l"]).start()

Process有几种方法可以让你获得shell命令的输出，以及退出代码：

/**
 * Causes the current thread to wait, if necessary, until the
 * subprocess represented by this {@code Process} object has
 * terminated, or the specified waiting time elapses.
 *
 * <p>If the subprocess has already terminated then this method returns
 * immediately with the value {@code true}.  If the process has not
 * terminated and the timeout value is less than, or equal to, zero, then
 * this method returns immediately with the value {@code false}.
 *
 * <p>The default implementation of this methods polls the {@code exitValue}
 * to check if the process has terminated. Concrete implementations of this
 * class are strongly encouraged to override this method with a more
 * efficient implementation.
 *
 * @param timeout the maximum time to wait
 * @param unit the time unit of the {@code timeout} argument
 * @return {@code true} if the subprocess has exited and {@code false} if
 *         the waiting time elapsed before the subprocess has exited.
 * @throws InterruptedException if the current thread is interrupted
 *         while waiting.
 * @throws NullPointerException if unit is null
 * @since 1.8
 */
public boolean waitFor(long timeout, TimeUnit unit)

/**
 * Causes the current thread to wait, if necessary, until the
 * process represented by this {@code Process} object has
 * terminated.  This method returns immediately if the subprocess
 * has already terminated.  If the subprocess has not yet
 * terminated, the calling thread will be blocked until the
 * subprocess exits.
 *
 * @return the exit value of the subprocess represented by this
 *         {@code Process} object.  By convention, the value
 *         {@code 0} indicates normal termination.
 * @throws InterruptedException if the current thread is
 *         {@linkplain Thread#interrupt() interrupted} by another
 *         thread while it is waiting, then the wait is ended and
 *         an {@link InterruptedException} is thrown.
 */
public abstract int waitFor() throws InterruptedException;

/**
 * Returns the exit value for the subprocess.
 *
 * @return the exit value of the subprocess represented by this
 *         {@code Process} object.  By convention, the value
 *         {@code 0} indicates normal termination.
 * @throws IllegalThreadStateException if the subprocess represented
 *         by this {@code Process} object has not yet terminated
 */
public abstract int exitValue();