git-cleanup-branch

#!/bin/bash

FEATURE_BRANCH="$(git branch --show-current)"
DEFAULT_BRANCH="$(git remote show origin | sed -n '/HEAD branch/s/.*: //p')"
if [[ "$FEATURE_BRANCH" == "$DEFAULT_BRANCH" ]]; then
    echo "Cannot delete default branch: $DEFAULT_BRANCH"
    exit 1
fi

# Get state of PR on current branch in lower case letters
# The state can be open, closed, merged, or all
PR_STATE="$(gh pr status --json state --jq .currentBranch.state | tr '[:upper:]' '[:lower:]')"
if [[ "$PR_STATE" == "" ]]; then
    echo "No PR open for feature branch: $FEATURE_BRANCH"
    read -p "Delete the branch? [Y/n]: " CONFIRMATION
    if [[ "$CONFIRMATION" != "Y" ]]; then
        exit 1
    fi
elif [[ "$PR_STATE" != "merged" ]] && [[ "$PR_STATE" != "closed" ]]; then
    PR_URL="$(gh pr status --json url --jq .currentBranch.url)"
    echo "PR is $PR_STATE. Close or merge it before cleaning up the branch!"
    echo "> $PR_URL"
    exit 1
fi

set -o xtrace
git checkout "$DEFAULT_BRANCH"
git pull
git branch -D "$FEATURE_BRANCH"