Implemented Auto-fix on project source

[Anmol202005]

Fixes: #12
Configured the OpenRewrite plugin to run automatically during the Maven build lifecycle, so code fixes will be applied during project builds.

Additionally, implemented Git diff logic in ci.yml to flag changes detected via git diff.

[timurt]

And one more quick question: have you tried running this updated CI? Is there a link to the executed CI jobs so we can confirm that it does exactly what we expect?

[timurt]

i guess it is a good place to use GitHub Actions error annotation (::error::), so it can be highlighted in UI

echo "::error::Code changes detected - run 'mvn clean verify' locally"

Code changes detected - run 'mvn clean verify' locally

https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#setting-an-error-message

btw I've never tried it before :)

[Anmol202005]

done.

[timurt]

Can we store it as a property and refer to the value here?

similar to https://github.com/checkstyle/checkstyle/blob/91f3e70c6f7d6bd8f3a0a2b4a8dcdf6ca3a582fb/pom.xml#L204

[Anmol202005]

done.

[Anmol202005]

And one more quick question: have you tried running this updated CI? Is there a link to the executed CI jobs so we can confirm that it does exactly what we expect?

LGTM, when building the project mvn clean verify, the recipes are running on the project.

 <<< rewrite:6.11.0:run (checkstyle-autofix) < process-test-classes @ checkstyle-openrewrite-recipes <<<
[INFO] 
[INFO] 
[INFO] --- rewrite:6.11.0:run (checkstyle-autofix) @ checkstyle-openrewrite-recipes ---
[INFO] Using active recipe(s) [org.checkstyle.autofix.CheckstyleAutoFix]
[INFO] Using active styles(s) []
[INFO] Validating active recipes...
[INFO] Project [checkstyle openrewrite recipes] Resolving Poms...
[INFO] Project [checkstyle openrewrite recipes] Parsing source files
[INFO] Running recipe(s)...

[timurt]

I was talking about this one https://github.com/checkstyle/checkstyle-openrewrite-recipes/actions/runs/15568305920/job/43837732096

LGTM

[rdiachenko]

lgtm