#!/bin/sh
#
# Licensed to the Apache Software Foundation (ASF) under one
# or more contributor license agreements.  See the NOTICE file
# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
# KIND, either express or implied.  See the License for the
# specific language governing permissions and limitations
# under the License.
#
# CloudStack DB Schema Police
# ===========================
#
# Modify and install in .git/hooks/
# Use this script as following hooks:
# post-merge  - when git merge or git pull runs
# post-rewrite - whenever commit is ammended or git rebase is run
# pre-rebase - before rebase runs
#
# Install:
# for file in post-merge post-rewrite pre-rebase; do cp db-police "../../.git/hooks/$file"; done

changed_files="$(git diff-tree -r --name-only --no-commit-id ORIG_HEAD HEAD)"

check_changes() {
    echo "\nList of changed files since original refs:"
    echo "$changed_files\n"

    alert_command=""
    if [ "$(uname)" == "Darwin" ]; then
        alert_command="say '$1'"
    elif [ "$(expr substr $(uname -s) 1 5)" == "Linux" ]; then
        alert_command="command -v festival && $(echo '$1' | festival --tts)"
    fi

    echo "$changed_files" | (grep --quiet "setup/db" && eval $alert_command) || true
}

check_changes "Alert, somebody changed CloudStack schemas"