New changelist format in git-changelist-maven-extension 1.3 breaks PCT testing of core incrementals

[basil]

Jenkins and plugins versions report

Jenkins: 2.329-rc31964.3b_29e9d46038 (from this build)
OS: Ubuntu 20.04.3 LTS x86_64

What Operating System are you using (both controller, and any agents involved in the problem)?

Ubuntu 20.04.3 LTS x86_64

Reproduction steps

Updating sample-plugin/pom.xml to

diff --git a/sample-plugin/pom.xml b/sample-plugin/pom.xml
index 396fceb..b996501 100644
--- a/sample-plugin/pom.xml
+++ b/sample-plugin/pom.xml
@@ -14,7 +14,7 @@
     <properties>
         <changelist>999999-SNAPSHOT</changelist>
         <bom>weekly</bom>
-        <jenkins.version>2.328</jenkins.version>
+        <jenkins.version>2.329-rc31964.3b_29e9d46038</jenkins.version>
         <java.level>8</java.level>
     </properties>
     <dependencyManagement>

try running e.g. PLUGINS=mailer TEST=jenkins.plugins.mailer.tasks.MimeMessageBuilderTest\#test_send bash local-test.sh.

Expected Results

The test passes.

Actual Results

The test fails with

Hook: org.jenkins.tools.test.hook.NodeCleanupBeforeCompileHook
Hook: org.jenkins.tools.test.hook.MultiParentCompileHook
Loaded multi-parent compile hook
Exception in thread "main" java.io.IOException: no jenkins-core.jar in /home/basil/src/jenkinsci/bom/target/local-test/megawar.war
        at org.jenkins.tools.test.PluginCompatTester.scanWAR(PluginCompatTester.java:872)
        at org.jenkins.tools.test.PluginCompatTester.testPlugins(PluginCompatTester.java:193)
        at org.jenkins.tools.test.PluginCompatTesterCli.main(PluginCompatTesterCli.java:175)

Anything else?

https://github.com/jenkinsci/plugin-compat-tester/blob/5a86f00cbbbba4e2c7dcb63f75538c8765e24e96/plugins-compat-tester/src/main/java/org/jenkins/tools/test/PluginCompatTester.java#L126-L127 needs to be adjusted to match the new versioning scheme.

[jglick]

Do you want to propose a PR? I am guessing we just need to replace [0-9a-f.] with [0-9a-f._]?

[jglick]

Awkward because bom still relies on jenkinsci/plugin-compat-tester#276 which I never managed to get over the line (jenkinsci/bom#657).

[basil]

which I never managed to get over the line

Well, in the immortal words of the great philosopher William Edward Hickson

If at first you don't succeed, try, try, try again.

[jglick]

Quick workaround would be a draft PR that merges the proposed fix for this with jenkinsci/plugin-compat-tester#276, just to get an incremental build.

[jglick]

Now tracked as jenkinsci/plugin-compat-tester#340.