#!/usr/bin/env bash -e

REMOTE="$1"
BRANCH="$2"

if [ !$REMOTE ]; then
  REMOTE="origin"
fi

if [ !$BRANCH ]; then
  BRANCH="master"
fi

git fetch $REMOTE
MERGEDBRANCHES=(`git log $REMOTE/$BRANCH --merges | ack --match "Merge pull request" | ack -o --match "[A-z0-9\-_\/]+$"  | sed -E 's_^[A-z0-9\-_]+/__'`)
LOCALBRANCHES=(`git branch | ack -o --match "[A-z0-9-_\/]+$"`)
TOREMOVE=()

SEARCH=" ${MERGEDBRANCHES[*]} "
for BRANCH in "${LOCALBRANCHES[@]}"; do
  if [[ $SEARCH =~ " $BRANCH " ]]; then
    TOREMOVE+=($BRANCH)
  fi
done

for RMBRANCH in "${TOREMOVE[@]}"; do
  git branch -D $RMBRANCH
done

git remote prune $REMOTE