Jenkins directory structure

From official documentation:

JENKINS_HOME has a fairly obvious directory structure that looks like the following:

JENKINS_HOME
 +- config.xml     (jenkins root configuration)
 +- *.xml          (other site-wide configuration files)
 +- userContent    (files in this directory will be served under your http://server/userContent/)
 +- fingerprints   (stores fingerprint records)
 +- nodes          (slave configurations)
 +- plugins        (stores plugins)
 +- secrets        (secretes needed when migrating credentials to other servers)
 +- workspace (working directory for the version control system)
     +- [JOBNAME] (sub directory for each job)
 +- jobs
     +- [JOBNAME]      (sub directory for each job)
         +- config.xml     (job configuration file)
         +- latest         (symbolic link to the last successful build)
         +- builds
             +- [BUILD_ID]     (for each build)
                 +- build.xml      (build result summary)
                 +- log            (log file)
                 +- changelog.xml  (change log)

Although the version (legacy) I am using is a bit different.

RequireUpperBoundDeps

Eventually, this issue would be faced if trying to compile Jenkins plugins: 

In the end, a dependency has a stale version (8.0.1) in this case.

[INFO] --- maven-enforcer-plugin:3.0.0-M3:enforce (display-info) @ azure-ad ---

[INFO] Adding ignore: module-info
[INFO] Ignoring requireUpperBoundDeps in com.google.guava:guava
[WARNING] Rule 5: org.apache.maven.plugins.enforcer.RequireUpperBoundDeps failed
 with message:
Failed while enforcing RequireUpperBoundDeps. The error(s) are [
Require upper bound dependencies error for org.ow2.asm:asm:5.0.4 paths to depend
ency are:
+-org.jenkins-ci.plugins:azure-ad:1.2.2
  +-org.jenkins-ci.main:jenkins-core:2.271
    +-com.github.jnr:jnr-posix:3.0.45
      +-com.github.jnr:jnr-ffi:2.1.8
        +-org.ow2.asm:asm:5.0.4 (managed) <-- org.ow2.asm:asm:5.0.3
and
+-org.jenkins-ci.plugins:azure-ad:1.2.2
  +-org.jenkins-ci.main:jenkins-core:2.271
    +-com.github.jnr:jnr-posix:3.0.45
      +-com.github.jnr:jnr-ffi:2.1.8
        +-org.ow2.asm:asm-tree:5.0.3
          +-org.ow2.asm:asm:5.0.4 (managed) <-- org.ow2.asm:asm:5.0.3
and
+-org.jenkins-ci.plugins:azure-ad:1.2.2
  +-com.microsoft.azure:azure:1.22.0
    +-com.microsoft.azure:azure-client-authentication:1.6.4
      +-com.microsoft.azure:adal4j:1.6.2
        +-com.nimbusds:oauth2-oidc-sdk:5.64.4
          +-net.minidev:json-smart:2.3
            +-net.minidev:accessors-smart:1.2
              +-org.ow2.asm:asm:5.0.4 (managed) <-- org.ow2.asm:asm:8.0.1
]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time:  01:08 min
[INFO] Finished at: 2022-01-09T10:12:15-03:00
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:3.
0.0-M3:enforce (display-info) on project azure-ad: Some Enforcer rules have fail
ed. Look above for specific messages explaining why the rule failed. -> [Help 1]

https://www.jenkins.io/doc/developer/plugin-development/updating-parent/

https://ourcraft.wordpress.com/2016/08/22/how-to-read-maven-enforcer-plugins-requireupperbounddeps-rule-failure-report/