git cleanup

git-cleanup.sh

#!/bin/bash

die() {
    echo "$@"
    exit 1
}

confirm() {
    ans=
    while true; do
        echo "$@" "[y/n]"
        read -r ans
        [[ "$ans" =~ ^(y|n)$ ]] && break
    done
    [ "$ans" = "y" ]
}

[[ "$#" == 0 || "$1" =~ ^(-h|--help)$ ]] && die "Usage: $0 [remote] branch"

if [[ "$#" -gt 2 ]]; then
    die "Expected 1 or 2 arguments, got $#"
fi

remote=
if [ "$#" == 2 ]; then
    remote="$1"; shift
fi
branch="$1"

if [ -n "$remote" ]; then
    git remote | grep -wq "$remote" || die "No such remote $remote"
    remote_branch="$remote/$branch"
    git branch -r | grep -wq "$remote_branch" || die "Remote branch doesn't exist"
    mapfile branches < <(git branch -r --merged "$remote_branch" | sed -e 's/\s*//' -e "/^$remote/!d" -e "/$remote\/\(\*\|$branch\|HEAD\)/d")
else
    git branch | grep -wq "$branch" || die "Branch doesn't exist"
    mapfile branches < <(git branch --merged "$branch" | sed -e 's/\s*//' -e "/\(\*\|$branch\|HEAD\)/d")
fi

[ "${#branches[@]}" -ne 0 ] || die "No merged branches found"
printf "%s" "${branches[@]}"
confirm "Do You want to remove these branches?" || die "Aborted"

if [ "$#" == 2 ]; then
    echo "${branches[@]}" | sed "s_\(^\|\s\)$remote/_\1:_g" | xargs -n1 git push "$remote"
else
    echo "${branches[@]}" | xargs git branch -d
fi