#!/bin/bash
# version 1.0.1
# made by Filip Rojek <filip@filiprojek.cz>
# project website: https://filiprojek.cz/projects/gitlab-ce-auto-minor-upgrade/
# git repo: https://git.filiprojek.cz/fr/gitlab-ce-auto-minor-upgrade/
#
# TODO:
#  - check and notify for new major version

PKG_NAME="gitlab-ce"

CURRENT_VERSION=$(dpkg -s $PKG_NAME | grep Version | sed 's/Version: //') # TODO: make this as an function and call it in success log line
MINOR_PREFIX=$(dpkg -s $PKG_NAME | grep Version | sed 's/Version: //' | awk -F "." '{print $1 "." $2}')
UPDATE_TO=$(apt-cache madison $PKG_NAME | grep $CURRENT_VERSION -B5 | awk -F "|" '{print $2}' | sed 's/ //' | grep $MINOR_PREFIX | head -n1)

DATE=$(date +'%Y-%m-%d %H:%M:%S')

UPDATE_LOG="/var/log/gitlab-auto-update.log"
ERROR_LOG="/var/log/gitlab-auto-update.error.log"

# Remove leading/trailing whitespace and newlines from the strings
CURRENT_VERSION=$(echo "$CURRENT_VERSION" | tr -d '[:space:]')
UPDATE_TO=$(echo "$UPDATE_TO" | tr -d '[:space:]')

if [[ "$CURRENT_VERSION" == "$UPDATE_TO" ]]; then
	echo "$DATE | $CURRENT_VERSION | no new minor version is available" >> /var/log/gitlab-auto-update.log
	exit 0
else
	echo "$DATE | $CURRENT_VERSION | updating to $UPDATE_TO" >> /var/log/gitlab-auto-update.log
	INSTALL_LOG=$(sudo apt install -y "$PKG_NAME=$UPDATE_TO")
	INSTALLATION_STATUS_CODE=$(echo $?)
	
	# Check if there were any errors
	if [ INSTALLATION_STATUS_CODE != 0 ]; then
		echo "$DATE | $CURRENT_VERSION | error occurred while updating the package" >> $UPDATE_LOG
		echo "$DATE | $CURRENT_VERSION | error occurred while updating the package" >> $ERROR_LOG
		echo $INSTALL_LOG >> $ERROR_LOG
		echo "\n\n\n" >> $ERROR_LOG
		cat "$ERROR_LOG"
		exit 1
	else
		echo "$DATE | $CURRENT_VERSION | package has been successfully updated to $UPDATE_TO" >> $UPDATE_LOG
		exit 0
	fi
fi