to grep the parent pom version and replace with new value

Question

i have an xml file in which i need to find the parent version and replace with a new value.

<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>com.test.proj</groupId>
        <artifactId>proj-core</artifactId>
        <version>1.1.0.0</version>
    </parent>
    <groupId>com.test.child</groupId>
    <artifactId>sub-module</artifactId>
    <version>2.20.0.0-SNAPSHOT</version>
    <packaging>pom</packaging>
    <name>test</name>
    <description>test suite</description>
</project>

in the above xml, I am able to change the module version using mvn command, but unable to change the parent version using script. Is there any ways to grep and replace the value?

I tried to change using the python script

from xml.etree.ElementTree import ElementTree
print ElementTree(file="pom.xml").findtext("{http://maven.apache.org/POM/4.0.0}parent/version")

By default is is taking the snapshot version only.

@SoumendraMishra i want to provide the input value through jenkins parameter For Example, if i trigger the jenkins build, it has to first grep and show the current parent version and has to replace with the new version that i am providing via Jenkins. — srbsreeram, Sep 23 '20 at 07:02
`"{http://maven.apache.org/POM/4.0.0}version"` gets me the SNAPSHOT version. `"{http://maven.apache.org/POM/4.0.0}parent/version"` gets me nothing at all. Are you trying to print out both of these, and then replace them both? With the same value? — tripleee, Sep 23 '20 at 07:41

score 0 · Answer 1 · answered Sep 23 '20 at 08:29

Your question is probably incomplete but at least here are the beginnings of an answer.

If you can use the stand-alone tool xmlstarlet, try this:

xmlstarlet sel -N m=http://maven.apache.or '//m:version' -n /tmp/pom.xml

Output:

1.1.0.0
2.20.0.0-SNAPSHOT

Then to modify,

xmlstarlet ed -N m=http://maven.apache.org/POM/4.0.0 -u '//m:version' -v 1.2.3.4  /tmp/pom.xml

Output:

<?xml version="1.0"?>
<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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>com.test.proj</groupId>
    <artifactId>proj-core</artifactId>
    <version>1.2.3.4</version>
  </parent>
  <groupId>com.test.child</groupId>
  <artifactId>sub-module</artifactId>
  <version>1.2.3.4</version>
  <packaging>pom</packaging>
  <name>test</name>
  <description>test suite</description>
</project>

Source / inspiration: https://unix.stackexchange.com/questions/398157/search-replace-in-xml-file-with-sed-or-awk and the XML Starlet manual

If you want to do this in Python then see e.g. Find and Replace Values in XML using Python (seriously think about migrating to Python 3 though!)

score 0 · Answer 2 · answered Sep 23 '20 at 12:43

0

You can set the parent version by using Maven itself:

mvn versions:update-parent -DparentVersion=1.2.3

answered Sep 23 '20 at 12:43

J Fabian Meier

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to grep the parent pom version and replace with new value

2 Answers2