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#!/usr/bin/env bash

### Finish a PR gracefully ###
set -euo pipefail
IFS=$'\n\t'


get_branch() {
    # Get current branch
    # Thanks StackOverflow: http://stackoverflow.com/a/12142066/678823
    branch="$(git rev-parse --abbrev-ref HEAD)"
    echo "$branch"
}


get_branch_name() {
    # Determine what type of branch this is
    branch_name="$(echo "$1" | awk -F '/' '{print $2}')"
    echo "$branch_name"
}


get_branch_type() {
    # Determine what type of branch this is
    branch_type="$(echo "$1" | awk -F '/' '{print $1}')"
    echo "$branch_type"
}


is_supported() {
    # Check if branch type is supported by git-flow
    supported_branch_types=("feature" "bugfix" "release" "hotfix" "support")
    for e in "${supported_branch_types[@]}"; do
        if [[ "${1}" == "${e}" ]]; then
            return 0
        fi
    done
    return 1
}


git_finish_branch() {
    # Pass type, keep remote branch
    # git flow assumes current branch is to be finished
    git flow "${1}" finish -k --showcommands
}


git_delete_branch() {
    # Pass type and name, remove remote branch
    git flow "${1}" delete "${2}" -r --showcommands
}


main() {
    branch="$(get_branch)"
    branch_type="$(get_branch_type "$branch")"
    branch_name="$(get_branch_name "$branch")"
    if $(is_supported "$branch_type"); then
        # Will checkout develop when done with merge
        echo "Finishing branch $branch"
        git_finish_branch "$branch_type"
        # Push to remote origin
        echo "Pushing to remote origin"
        git push
        # Now it's safe to delete
        echo "Deleting branch $branch"
        git_delete_branch "$branch_type" "$branch_name"
    else
        echo "Branch type '$branch_type' not supported"
    fi
}

main