How to find source branch name of a PR in bitbucket pipeline

Question

I am running bitbucket pipeline where I need to run a script from master. I have to fetch few details from the PR source branch. Hence I need the name for source branch on which we create the pull request. Bitbucket provides the default parameter for the destination but not for the source branch.

Please help if someone knows the way to find source branch name. Thanks

Marco Pellicciotta · Answer

I achieved like this:

COMMIT_INFO=$(git show -s --format=%s $BITBUCKET_COMMIT)
echo $COMMIT_INFO
if [[ $COMMIT_INFO == *"pull request"* ]]; then
    [[ $COMMIT_INFO =~ Merged[[:space:]]in[[:space:]](.+)[[:space:]]\(pull[[:space:]]request ]]
    echo "My source branch is: ${BASH_REMATCH[1]}"
fi

Samuel.Sidor · Answer

I achieved this like:

CURRENT_COMMIT_HASH="$(git rev-parse --short HEAD)"

if ! git show ${CURRENT_COMMIT_HASH} | grep -q "Merged in"; then
    echo "Single commit directly added to branch, versioning only works for branch merge."
    return 0
fi

BITBUCKET_PR_SOURCE_BRANCH=$(git show ${CURRENT_COMMIT_HASH} | grep -oP 'Merged in \K.*(?= \(pull request)')
echo "BITBUCKET_PR_SOURCE_BRANCH: ${BITBUCKET_PR_SOURCE_BRANCH}"

IFS='/' read -ra BRANCH_PARTS <<< "${BITBUCKET_PR_SOURCE_BRANCH}" # split branch name by '/'
if [ "${#BRANCH_PARTS[@]}" -eq 0 ]; then
  echo "No branch prefix specified, this commit wont be versioned."
  return 0
fi

Goutham Siddhaarth · Answer

Hi Atlassian Team,

I'm trying to achieve the same, is there any new update on getting the merged feature branch name in the master branch pipeline.

Rgds,
Goutham