Cloudlog/update_cloudlog.sh

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#!/bin/bash
# Cloudlog update script
#
# Pulls changes from Git remote and re-sets appropriate directory ownership.
# Can be run manually or on a schedule using Cron.
#
# Please check the DIR_OWNERSHIP variable carefully to make sure it is
# appropriately set for your system!
# The user and group that own the CLOUDLOG_SUBDIR directories. Passed to 'chown' as-is.
DIR_OWNERSHIP="root:www-data"
# The list of directories that need to have ownership restored after a git pull
declare -a CLOUDLOG_SUBDIRS=("application/config" "assets" "backup" "updates" "uploads")
# The name of the Git remote to fetch/pull from
GIT_REMOTE="origin"
# If true, pull from the HEAD of the configured origin, otherwise the latest tag
BLEEDING_EDGE="true"
# If true, restore directory ownership on CLOUDLOG_SUBDIRS after a git pull
RESTORE_OWNERSHIP="true"
check_working_dir() {
# Quick sanity check to make sure that pwd looks like a Cloudlog install
if [[ ! -d "$(pwd)/application" ]]
then
echo "$(pwd) doesn't look like a Cloudlog install directory! Stopping here."
exit 1
fi
}
fast_forward_to_tag() {
# Find the latest tag on the current branch
# See https://git-scm.com/docs/git-describe for details on retrieving tags
LATEST_TAG=$(git describe --tags --abbrev=0)
echo "Fast-forwarding to latest tag: $LATEST_TAG..."
if git pull $GIT_REMOTE $LATEST_TAG ; then
echo "Fast-forward finished successfully."
else
echo "Fast-forward failed; stopping here."
exit 2
fi
}
fast_forward_to_head() {
echo "Fast-forwarding to HEAD (bleeding-edge)..."
if git pull $GIT_REMOTE ; then
echo "Fast-forward finished successfully".
else
echo "Fast-forward failed; stopping here."
exit 3
fi
}
restore_ownership() {
for dir in "${CLOUDLOG_SUBDIRS[@]}"; do
echo "Setting ownership as $DIR_OWNERSHIP on $dir"
chown -R $DIR_OWNERSHIP $(pwd)/$dir
done
}
echo "Cloudlog update started"
echo "-----------------------"
echo "Using $(pwd) as working directory"
check_working_dir
# Fetch the latest changes from the master branch
echo "Fetching changes from remote..."
if git fetch $GIT_REMOTE --tags ; then
echo "Fetched latest changes successfully"
else
echo "Fetch failed; stopping here."
exit 4
fi
if [ "$BLEEDING_EDGE" = true ]; then
fast_forward_to_head
else
fast_forward_to_tag
fi
if [ "$RESTORE_OWNERSHIP" = true ]; then
restore_ownership
fi
echo "Cloudlog update finished"