Jenkins Pipeline - How to fix syntax error in matrix section? - jenkins

Question

I've been trying to configure a matrix section in a declarative pipeline, but it keeps failing.
In the official documentation, it states:
Stages in Declarative Pipeline may have a matrix section defining a multi-dimensional matrix of name-value combinations to be run in parallel.
This is my (simplified) pipeline:
pipeline {
agent { label 'production-linux' } // Set where this project can run
stages {
stage("do something") {
matrix {
axes {
axis {
name 'foo'
values 'bar1', 'bar2', 'bar3'
}
}
stages{
stage("using $foo"){
steps{
step {
echo "using variable: $foo"
}
}
}
}
}
}
}
}
But when I run it, I get the following:
org.codehaus.groovy.control.MultipleCompilationErrorsException: startup failed:
WorkflowScript: 14: Unknown stage section "matrix". Starting with version 0.5, steps in a stage must be in a ‘steps’ block. # line 14, column 9.
stage("do something") {
^
WorkflowScript: 14: Expected one of "steps", "stages", or "parallel" for stage "do something" # line 14, column 9.
stage("do something") {
^
Has the Matrix section been deprecated?

Answer 1

Has the Matrix section been deprecated?
No it has not. The exception tells that it found a syntax error.
Your syntax error appears here:
steps{
step {
echo "using variable: $foo"
}
}
Quoting the official documentation:
The steps section defines a series of one or more steps to be executed
in a given stage directive.
Unfortunately there is no step-keyword directly, every command you execute in the steps is basically a step. To fix your syntax error try the following:
steps{
echo "using variable: $foo"
}