CODEWITHSUNDEEP
jenkinscommand-line-interface
Kevin Burke
Kevin Burke

Reputation: 65024

Get Jenkins version via java -jar jenkins.war --version without spam output

I'm trying to get the version of the Jenkins war deployed to /usr/share/jenkins/jenkins.war. I try running:

local version=$(java -jar /usr/share/jenkins/jenkins.war --version)

Unfortunately this prints several silly lines of output to stdout before the version number:

Running from: /usr/share/jenkins/jenkins.war
webroot: $user.home/.jenkins
1.643

Is there a way to tell Jenkins to avoid printing the webroot and "running from" lines? It's annoying and I imagine any attempt to parse it (check the 3rd line of stdout) is prone to breaking in the future.

Upvotes: 13

Views: 37390

Answers (4)

Kalifornium
Kalifornium

Reputation: 1072

Extract your jankins.war file, it's generally located in your installation directory and navigate to the pom.xml file in META-INF\maven\org.jenkins-ci.main\jenkins-war. In this file, you'll find code similar to the following:

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <groupId>org.jenkins-ci.main</groupId>
    <artifactId>jenkins-war</artifactId>
    <version>2.426.2</version>
    <packaging>war</packaging>
    <name>Jenkins war</name>
.....

The version is mentioned within the < version > tag. In my case, it's version 2.426.2.

Upvotes: 0

Megha Chovatiya
Megha Chovatiya

Reputation: 533

Jenkins version can be easily checked from the config.xml file.

  1. Navigate to Jenkins Folder location in the server.
  2. Search for config.xml file in it. Mostly it will be just directly inside Jenkins folder
  3. type command head -10 config.xml
  4. It should be in the 7th Line - <version>2.176.2</version>

Upvotes: 3

Alferd Nobel
Alferd Nobel

Reputation: 3979

Should this help ( on linux) :

head -5  /var/lib/jenkins/config.xml| grep -oP '(?<=<version>).*?(?=</version>)'

Upvotes: 6

Christopher Orr
Christopher Orr

Reputation: 111625

Since Jenkins 1.649, the --version flag causes the version to be printed out directly without any of the extraneous information:

$ wget -q http://mirrors.jenkins.io/war/1.649/jenkins.war \
      && java -jar jenkins.war --version
1.649

(original answer, pre-Jenkins 1.649)

As part of the WAR packaging process, the Jenkins version is written to the manifest, which is where the --version flag gets its answer from.

So while it may not be particularly pretty, this should be stable:

unzip -c /usr/share/jenkins/jenkins.war META-INF/MANIFEST.MF \
  | egrep ^Jenkins-Version: | awk '{print $2}'

(assuming the availability of unzip and friends)

Upvotes: 23

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