[FIXED JENKINS-52259] Add yamlFile option for Declarative agent

[abayer]

JENKINS-52259

If given, it'll read from the specified file via readTrusted and use
that for the yaml to pass on.

I don't have a local k8s env on my laptop so I haven't actually tested this yet. =)

[carlossg]

this is the error I'm getting trying to build examples/declarative_from_yaml_file

Started by user anonymous
Obtained examples/declarative_from_yaml_file/Jenkinsfile from git https://github.com/abayer/kubernetes-plugin.git
Running in Durability level: MAX_SURVIVABILITY
[Pipeline] readTrusted
ERROR: Could not do lightweight checkout, falling back to heavyweight
java.io.FileNotFoundException
	at jenkins.plugins.git.GitSCMFile$3.invoke(GitSCMFile.java:167)
	at jenkins.plugins.git.GitSCMFile$3.invoke(GitSCMFile.java:159)
	at jenkins.plugins.git.GitSCMFileSystem$3.invoke(GitSCMFileSystem.java:193)
	at org.jenkinsci.plugins.gitclient.AbstractGitAPIImpl.withRepository(AbstractGitAPIImpl.java:29)
	at org.jenkinsci.plugins.gitclient.CliGitAPIImpl.withRepository(CliGitAPIImpl.java:72)
	at jenkins.plugins.git.GitSCMFileSystem.invoke(GitSCMFileSystem.java:189)
	at jenkins.plugins.git.GitSCMFile.content(GitSCMFile.java:159)
	at jenkins.scm.api.SCMFile.contentAsString(SCMFile.java:338)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:103)
	at org.jenkinsci.plugins.workflow.multibranch.ReadTrustedStep$Execution.run(ReadTrustedStep.java:82)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1$1.call(AbstractSynchronousNonBlockingStepExecution.java:47)
	at hudson.security.ACL.impersonate(ACL.java:290)
	at org.jenkinsci.plugins.workflow.steps.AbstractSynchronousNonBlockingStepExecution$1.run(AbstractSynchronousNonBlockingStepExecution.java:44)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
[Pipeline] End of Pipeline
ERROR: ‘readTrusted’ is only available when using “Multibranch Pipeline” or “Pipeline script from SCM”
Finished: FAILURE

[abayer]

@carlossg - works in my test env - looks like https://jenkins.gke.csanchez.org/blue/organizations/jenkins/jenkinsci%2Fkubernetes-plugin/detail/PR-355/4/pipeline#step-30-log-251 may be the relevant bit? git not installed on the "master" image?

[abayer]

Well, slightly more accurately, the test still fails for me due to the agent not being able to talk to the Jenkins master, but I'm fairly sure that's just a botched setup of mine, and the readTrusted and provisioning on Kubernetes parts work perfectly.

[abayer]

Got past that, hit another gotcha in that the auto-checkout of the SCM in the actual Jenkinsfile didn't work because the repo's URL is...a path on the host we're running Maven on, which the container obviously can't get at it. Easy fix - just added skipDefaultCheckout(true) to options and now it passes.

[carlossg]

ok, now the example runs with hpi:run