Re: Properties in a pipeline

['Martin Schmude' via Jenkins Users]

This script  

pipeline {
    agent any
    stages {
        stage('play with properties') {
            steps {
                script {
                    def propsText = 'prop1 = val1\nprop2 = 
val2\nbuild.host=mybuildhost.hosts.myorganization.org'
                    writeFile file: 'myProps.properties', text: propsText
                    def props = readProperties file: 'myProps.properties'
                    echo "${props}"
                    echo props['build.host']
                }
            }
        }
    }
}

works. You can read properties from a properties file into a variable and 
then access the properties by indexing that variable.  
But you have to place the variable into a script block. The declarative 
syntax of Jenkins pipelines 
(https://www.jenkins.io/doc/book/pipeline/syntax/#declarative-pipeline) 
doesn't allow them anywhere else, in particular not "... right at the 
beginning.".  
So if you need the properties in several script blocks you have to 
readProperties them in each of the blocks.  

This is different with the scripted syntax 
(https://www.jenkins.io/doc/book/pipeline/syntax/#scripted-pipeline) where 
you can set a variable in an outer block that spans multiple stages, like 
this:

node {
    def props = ''
    stage('read properties') {
        writeFile file: 'myProps.properties', text: 'prop1 = val1\nprop2 = 
val2\nbuild.host=mybuildhost.hosts.myorganization.org'
        props = readProperties file: 'myProps.properties'
        echo "${props}"
    }
    stage('access properties') {
        echo props['build.host']
    }
}




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