防止在Jenkinsfile中计算${PIPELINESTATUS[0]}

Question

下面是我在部署一个码头容器时运行的一个脚本。当容器没有正确构建/测试时，docker ps -a | grep $APP_CONTAINER_NAME命令将返回非零值，因此产生了|| true。

如何防止Jenkins将${PIPELINESTATUS}解释为脚本中的变量替换？

sh label: 'Stop and Remove Old Docker Container', script: '''
                    docker ps -a
                    echo $APP_CONTAINER_NAME

                    docker ps -a | grep $APP_CONTAINER_NAME || true
                    DOCKERCODE="${PIPESTATUS[0]}"
                    GREPCODE="${PIPESTATUS[1]}"
                    echo "Docker Command Code: $DOCKERCODE"

                    echo "Grep Command Code: $GREPCODE"

                    if [ $DOCKERCODE -eq 0 ] then;
                        docker stop $APP_CONTAINER_NAME
                        docker rm $APP_CONTAINER_NAME
                    else
                        echo "WARNING: Docker command was empty or had an error"
                    fi
                '''

EDIT1:为了澄清-这个命令给出了错误/mnt/data/jenkins/workspace/Test@tmp/durable-4c7b4748/script.sh: 7: /mnt/data/jenkins/workspace/Test@tmp/durable-4c7b4748/script.sh: Bad substitution

我尝试过三重双引号，对shell脚本中的引号进行转义，单个引用PIPESTATUS命令会阻止执行。

更新:我试着逃避了很多事情。一个斜杠也会导致上述错误。双斜杠导致打印该行而不运行bash命令。

        sh label: 'Stop and Remove Old Docker Container', script: '''
                docker ps -a
                echo $APP_CONTAINER_NAME

                docker ps -a | grep $APP_CONTAINER_NAME || true
                echo "HERE"
                echo \\${PIPESTATUS[@]}
                DOCKERCODE="\\${PIPESTATUS[0]}"
                GREPCODE="\\${PIPESTATUS[1]}"
                echo "Docker Command Code: \$DOCKERCODE"

                echo "Grep Command Code: \$GREPCODE"

                if [ \\$DOCKERCODE -eq 0 ] then;
                    docker stop $APP_CONTAINER_NAME
                    docker rm $APP_CONTAINER_NAME
                else
                    echo "WARNING: Docker command was empty or had an error"
                fi
            '''

上述版本的产出：

TEST
+ docker ps -a
+ grep TEST
+ true
+ echo HERE
HERE
+ echo ${PIPESTATUS[@]}
${PIPESTATUS[@]}
+ DOCKERCODE=${PIPESTATUS[0]}
+ GREPCODE=${PIPESTATUS[1]}
+ echo Docker Command Code: ${PIPESTATUS[0]}
Docker Command Code: ${PIPESTATUS[0]}
+ echo Grep Command Code: ${PIPESTATUS[1]}
Grep Command Code: ${PIPESTATUS[1]}
/mnt/data/jenkins/workspace/Test@tmp/durable-4a5608fa/script.sh: 17: /mnt/data/jenkins/workspace/Test@tmp/durable-4a5608fa/script.sh: Syntax error: "else" unexpected (expecting "then")

最后的答案: shebang需要与脚本在同一行：“”，因为系统读取前几个字符来检查#！

sh label: 'Stop and Remove Old Docker Container', script: '''#!/usr/bin/env bash             
                docker ps -a
                echo $APP_CONTAINER_NAME

                docker ps -a | grep $APP_CONTAINER_NAME || true
                status=("${PIPESTATUS[@]}")
                DOCKERCODE=${status[0]}
                GREPCODE=${status[1]}
                echo "Docker Command Code: $DOCKERCODE"

                echo "Grep Command Code: $GREPCODE"

                if [ $DOCKERCODE -eq 0 ]; then
                    docker stop $APP_CONTAINER_NAME
                    docker rm $APP_CONTAINER_NAME
                else
                    echo "WARNING: Docker command was empty or had an error"
                fi
            '''

Answer 1

这里似乎存在一些语法问题，如果使用bash shell，我也建议使用sh。

试试下面的代码，看看它是否正常工作。(编辑-把她放在第一行接受作为答案)

sh label: 'Stop and Remove Old Docker Container', script: '''#!/usr/bin/env bash
                docker ps -a
                echo $APP_CONTAINER_NAME

                docker ps -a | grep $APP_CONTAINER_NAME || true
                status=("${PIPESTATUS[@]}")
                DOCKERCODE=${status[0]}
                GREPCODE=${status[1]}
                echo "Docker Command Code: $DOCKERCODE"

                echo "Grep Command Code: $GREPCODE"

                if [ $DOCKERCODE -eq 0 ]; then
                    docker stop $APP_CONTAINER_NAME
                    docker rm $APP_CONTAINER_NAME
                else
                    echo "WARNING: Docker command was empty or had an error"
                fi
            '''

在上面的代码中，我改变了您试图使用docker ps -a | grep $APP_CONTAINER_NAME || true变量获取命令PIPESTATUS输出的方式。因为PIPESTATUS是一个特殊的变量，所以它的值在每个命令之后都会更新，所以您没有得到任何${PIPESTATUS[1]}值

我所做的另一个更改是将if [ $DOCKERCODE -eq 0 ] then;行中的语法问题修正为if [ $DOCKERCODE -eq 0 ]; then。

您可以进一步测试代码。