How to load files from resources folder in Shared library without knowing their names (or number)?

Question

As you know, in Shared libraries in Jenkins, it is possible to load a resource (located in resources folder) by doing:

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Answer 1

You can get absolute path of your shared library using Groovy @SourceURI annotation:

// vars/get_resource_dir.groovy
import groovy.transform.SourceURI
import java.nio.file.Path
import java.nio.file.Paths

class ScriptSourceUri {
    @SourceURI
    static URI uri
}

def call() {
    Path scriptLocation = Paths.get(ScriptSourceUri.uri)
    return scriptLocation.getParent().getParent().resolve('resources').toString()
}

Using the path you can invoke your scripts as usual:

sh "${get_resource_dir()}/com/example/test.sh"