Some Jenkinsfile are not parsable by Groovy parser

[jonesbusy]

Plugin Modernizer version

1158.va_b_46a_2a_dde30

What Operating System are you using

Linux

Reproduction steps

plugin-modernizer run --plugins ssh --recipe UpgradeToRecommendCoreVersion --debug

I'm wonder if it's due to the shebang, but OpenRewrite is not able to parse following Jenkinsfile

#!/usr/bin/env groovy

/* `buildPlugin` step provided by: https://github.com/jenkins-infra/pipeline-library */
buildPlugin(
        useContainerAgent: true,
        configurations: [
                [platform: 'linux', jdk: 21],
                [platform: 'windows', jdk: 17],
        ])

[INFO] Project [Jenkins SSH plugin] Resolving Poms...
[INFO] Project [Jenkins SSH plugin] Parsing source files
[WARNING] There were problems parsing some source files, run with --errors to see full stack traces
[WARNING] There were problems parsing Jenkinsfile

Expected Results

The point is that it prevent to use other recipe because we assume the JDK is Java 8 (buildPlugin() with implicit version).

Since the metadata correctly contains the Jenkins version

{"pluginName":"Jenkins SSH plugin","flags":["DEVELOPER_SET","SCM_HTTPS","MAVEN_REPOSITORIES_HTTPS"],"commonFiles":["DEPENDABOT","README","WORKFLOW_SECURITY","MAVEN_CONFIG","INDEX_JELLY","WORKFLOW_CD","JENKINSFILE","GITIGNORE","POM","MAVEN_EXTENSIONS","CODEOWNERS"],"jenkinsVersion":"2.426.3","parentVersion":"4.88","bomVersion":"3208.vb_21177d4b_cd9","bomArtifactId":"bom-${jenkins.baseline}.x","properties":{"changelist":"999999-SNAPSHOT","jenkins.baseline":"2.426","jenkins.version":"${jenkins.baseline}.3","gitHubRepo":"jenkinsci/${project.artifactId}-plugin","spotless.check.skip":"false"},"key":"plugin-metadata","path":"ssh"}

We could easily detect the minimum version using

JDK.get(jenkinsVersion)

Which in that case would return Java 11

[jonesbusy]

Workaround implemented on #583

Keeping it open to understand the root cause and perhaps propose a fix on openrewrite-groovy