Glob patterns in Jenkinsfile sh (shell) steps - jenkins

Question

I'm trying to set up a Jenkinsfile to run our CI pipeline. One of the steps will involve collecting files from across our directory tree and copying them into a single directory, for zipping up.
I'm attempting to do this using the Jenkins sh step and using glob patterns, but I can't seem to get this to work.
A simple example Jenkinsfile would be:
pipeline {
agent any
stages {
stage('List with Glob'){
steps{
sh 'ls **/*.xml'
}
}
}
}
I would expect that to list any .xml files in the workspace, but instead I receive:
[Pipeline] }
[Pipeline] // stage
[Pipeline] withEnv
[Pipeline] {
[Pipeline] stage
[Pipeline] { (List with Glob)
[Pipeline] sh
[jenkinsfile-pipeline] Running shell script
+ ls '**/*.xml'
ls: cannot access **/*.xml: No such file or directory
[Pipeline] }
[Pipeline] // stage
[Pipeline] }
[Pipeline] // withEnv
[Pipeline] }
[Pipeline] // node
[Pipeline] End of Pipeline
ERROR: script returned exit code 2
Finished: FAILURE
I think i'm missing something with Groovy string interpolation, but I need some help for this specific case (running in a Jenkins pipeline via a Jenkinsfile)
Any help much appreciated!

Answer 1

As far as I can tell **/*.xml' isn't a valid glob pattern (see this). Instead what you have there is an ant naming pattern, which, as far as I know, isn't supported by bash (or sh). Instead what you wan't to do is to use find:
pipeline {
agent any
stages {
stage('List with find'){
steps{
sh "find . -type f -name '*.xml'"
}
}
}
}