clean-merged-branches.sh

#!/bin/sh
#/ Usage: clean-merged-branches

#/ Delete locally merged branches
set -e

# show usage maybe
[ "$1" = "--help" ] && {
    grep '^#/' <"$0"| cut -c4-
    exit 0
}

# fetch and prune remote branches
git fetch origin --prune

# Delete merged local branches
git branch --merged | grep -v '*' | grep -v master | xargs git br -d

# grab list of merged branches
branches=$(
  git branch -r --merged |
  sed 's@origin/@@'
)

# bail out with no branches
[ -z "$branches" ] && {
    echo "no merged branches detected" 1>&2
    exit 0
}

# delete the branches or just show what would be done without -f
echo "Merged branches on origin: " 1>&2
echo "$branches"