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#!/bin/sh
# 
# A script to maintain a local working copy of an oxidized configuration
# repository and mail out diffs for configuration changes
# 
# Copyright 2016 Nick Hilliard <nick@foobar.org>, All Rights Reserved
# 
# Licensed 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.
#
# usage: add the following hook to the oxidized config file:
# 
# hooks:
#  email_output:
#    type: exec
#    events: [post_store, node_fail]
#    cmd: '/home/oxidized/extra/oxidized-report-git-commits ~/gitdir/ | mail -s "Oxidized updates for ${OX_NODE_NAME}" update-recipient@example.com'
#    async: true
#    timeout: 120
# 
#
# The script takes a single argument, namely a git working directory name,
# e.g.  "~/gitdir/".  This is only used as a staging directory and should
# not be set to be the same as the git repo directory.
#

PATH=${PATH}:/usr/local/bin:/usr/local/sbin
export PATH

gitdir=$1

if [ X${OX_REPO_COMMITREF} = "X" ]; then
	echo \$OX_REPO_COMMITREF not set
	exit 64
fi

if [ X${OX_REPO_NAME} = "X" ]; then
	echo \$OX_REPO_NAME not set
	exit 64
fi
	
if [ ! -d ${gitdir}/.git ]; then
	git clone -q ${OX_REPO_NAME} ${gitdir}

	ret=$?
	if [ X"${ret}" != X0 ] && [ X"${ret}" != X1 ]; then
		echo git clone failed: aborting.
		exit 128
	fi
fi

cd ${gitdir}

git pull -q > /dev/null 2>&1 
ret=$?
if [ X"${ret}" != X0 ] && [ X"${ret}" != X1 ]; then
	echo git pull failed: aborting.
	exit 128
fi

# Git is probably working at this stage, so safe to emit more info

echo "Node name: ${OX_NODE_NAME}"
echo "Group Name: ${OX_NODE_GROUP}"
echo "Job Time: ${OX_JOB_TIME}"
echo "Git Commit ID: ${OX_REPO_COMMITREF}"
echo "Git Repo: ${OX_REPO_NAME}"
echo "Local working dir: ${gitdir}"
echo ""

git diff --no-color ${OX_REPO_COMMITREF}~1..${OX_REPO_COMMITREF}