Working with XML in PowerShell

Create an XML object from an XML file

Cast in [xml] to create an XML object.

PS> $xml = [xml](Get-Content .\Settings.xml -Encoding UTF8)
PS> $xml
 
xml                            project
---                            -------
version="1.0" encoding="UTF-8" project

The following is an XML file that I prepared.

PS> Get-Content .\Settings.xml -Encoding UTF8
<?xml version='1.0' encoding='UTF-8'?>
<project>
  <view>
    <includeRegex>(?i).*DT-4000.*</includeRegex>
  </view>
  <deployJob>
    <jobName>DT-4000_TestDeploy</jobName>
    <p4Stream>//stream_depot/LM_CIV_DT-4000_TestDeploy</p4Stream>
  </deployJob>
</project>

Referencing and rewriting the value of an XML object

Use dot (.) to refer to the value of an XML object.

PS> $xml.project.deployJob.jobName
DT-4000_TestDeploy
PS> $xml.project.deployJob.jobName = "DT-4000_Deploy"
PS> $xml.project.deployJob.jobName
DT-4000_Deploy

Saving an XML object to a file

Use $xml.Save($Path).
If you want to specify the encoding, another way.

PS> $Path = "C:\Users\miajimyu\Desktop\Output.xml"
PS> $xml.Save($Path)
PS> Get-Content -LiteralPath $Path
<?xml version="1.0" encoding="UTF-8"?>
<project>
  <view>
    <includeRegex>(?i).*DT-4000.*</includeRegex>
  </view>
  <deployJob>
    <jobName>DT-4000_Deploy</jobName>
    <p4Stream>//stream_depot/LM_CIV_DT-4000_TestDeploy</p4Stream>
  </deployJob>
</project>

Convert an XML object to a string

You can use $xml.OuterXML to turn an XML object into a string.

# Example: Based on an existing job in Jenkins, edit the XML and create a new job
PS> $text = java -jar jenkins-cli.jar -s "http://localhost:8080/" get-job Test
PS> $text
<?xml version='1.0' encoding='UTF-8'?>
<project>
  <actions/>
  <description>Description</description>
  <keepDependencies>false</keepDependencies>
  <properties>
    <org.jvnet.hudson.plugins.shelveproject.ShelveProjectProperty plugin="shelve-project-plugin@1.5"/>
  </properties>
  <scm class="hudson.scm.NullSCM"/>
  <canRoam>true</canRoam>
  <disabled>false</disabled>
  <blockBuildWhenDownstreamBuilding>false</blockBuildWhenDownstreamBuilding>
  <blockBuildWhenUpstreamBuilding>false</blockBuildWhenUpstreamBuilding>
  <triggers/>
  <concurrentBuild>false</concurrentBuild>
  <builders/>
  <publishers/>
  <buildWrappers/>
</project>
PS> $xml = [xml]$text
PS> $xml

xml                            project
---                            -------
version="1.0" encoding="UTF-8" project

PS> $xml.project.description
Description
PS> $xml.project.description = "New Description"
PS> $xml.OuterXml | java -jar jenkins-cli.jar -s "http://localhost:8080/" create-job NewTest
Last modified October 11, 2022: update (8216439)