Multiline bash command in Jenkins pipeline

Question

I have the following sh command in my Jenkinsfile which does not work because it tries to execute the last "DATA" as a command. If I move last "DATA" to the beginning of the line it works but is not as beautiful as I want. Is there a way to the indention in this case?

    sh """
        sshpass -p 'password' ssh -o StrictHostKeyChecking=no appsadm@$backup_registry <<DATA
        sudo /etc/init.d/docker stop || true
        sudo yum remove -y docker-engine.x86_64
        sudo rm -fr /var/lib/docker /var/log/docker
        sudo rpm -iUvh http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm || true
        sudo yum update -y
        sudo yum -y install docker-io
        sudo sed -i 's#other_args=.*#other_args="--insecure-registry $official_registry:5000"#g' /etc/sysconfig/docker
        sudo /etc/init.d/docker start
        DATA
        """

waaffles · Accepted Answer · 2018-04-23 21:48:07Z

25

I know this is an old question, but I had ran into this at some point, and eventually ended up using stripIndent()

steps {
    echo 'Deploying....'
    sh """
    ssh somewhere <<EOF
    cd somewhere
    do some more stuff
    EOF
    """.stripIndent()
}

That way you can still keep your indentations and formatting

answered Apr 23, 2018 at 21:48

waaffles

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1 Comment

Andrew Falanga Over a year ago

It is strange. I saw this yesterday and liked the "elegance" of it. However, it didn't work for me. In my case, the ssh somewhere and delimiter did align by spaces, but the pipeline didn't see the EOF properly: even when I used <<EOF. I don't know Groovy, could there be a difference in the use of stripIndent() inside of a script block as opposed to the steps you have?

Nahuel Fouilleul · Accepted Answer · 2017-06-30 09:02:54Z

5

because <<DATA specifies the end of here-doc <<-DATA suppress leading tabs but not spaces

cat <<-DATA
    hello
<tab>DATA

another option is to add spaces in marker

cat << "    DATA"
    hello
    DATA

answered Jun 30, 2017 at 9:02

Nahuel Fouilleul

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3 Comments

tig Over a year ago

won't the second option mean that variables in the multi-line string won't be interpreted?

Nahuel Fouilleul Over a year ago

the commands just demonstrate how heredoc works. How the content is interpreted depends on the program which reads input here cat will dysplay the content; in your question will be executed by a shell through ssh and sshpass.

Zuabi Over a year ago

how would you remove spaces as well, not just tabs?

Pavan Jadda · Accepted Answer · 2019-10-29 03:59:31Z

1

Edit: We don't need to use EOF, simply put the semicolon at the end of statement on multiline shell script as shown below

sh """ if [ -d /opt/tomcat/apache-tomcat-8.5.38/webapps/ROOT ] ;
       then ;
            ssh $USERNAME@$DEV_HOSTNAME 'sudo rm -rf /opt/tomcat/apache-tomcat-8.5.38/webapps/ROOT' ;
            echo 'ROOT directory deleted successfully' ;
       fi ;
"""

edited Oct 29, 2019 at 3:59

answered Oct 25, 2019 at 3:57

Pavan Jadda

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