get the branch name when in detached HEAD (e.g. when a tag is created)

[arauchberger]

Describe your idea

i'm triggering my maven-pipeline via GitHub-workflow.
when a simple commit triggers the wf, the property git.branch tells me the branch correctly (master, my_experiment, ...)
when a tag triggers the wf, we have a detached head situation and your plugin (as documented) falls back to the commit-id for the property git.banch.

Expected Behavior

property git.branch (or an additional property) should always show the branch name for the checked-out commit.

[arauchberger]

just as a hint, what i do in the gh-workfow to find out the branch name:

GIT_LOG=$(git log -1 --format='%D' $GITHUB_SHA)

this gives you something like:
HEAD -> master, tag: 1.4.3-SNAPSHOT-RC11, origin/master

then i remove everything until 'origin/':

BRANCH_NAME=$(echo $GIT_LOG | sed -e 's/.*origin\/\(.*\)/\1/')

this gives you the branch name:
master

[TheSnoozer]

Could you perhaps share your workflow pipeline?

The branch should be extracted via https://github.com/git-commit-id/git-commit-id-plugin-core/blob/master/src/main/java/pl/project13/core/cibuild/GitHubBuildServerData.java

[TheSnoozer]

Please reopen if still an issue.