#!/bin/bash
# Script Updating Gitea (c) Thomas Kuschel
# since 2024

echo "Update the Gitea from the website and restart Gitea service"

website_latest="https://github.com/go-gitea/gitea/releases/latest"
website_uri="https://dl.gitea.io/gitea"
file_prefix="gitea"
file_suffix="linux-amd64"
install_dir="/usr/local/bin"
file_gitea="gitea"
temp_folder="temp.gitea.08154711"

# get the latest version with the website_latest uri to github:
website_version_raw=$( curl -Ls -I -o /dev/null -w %{url_effective} ${website_latest} )
website_version=$( echo ${website_version_raw} | sed -E 's#(.*/v)([0-9\.]*)#\2#g' )
# echo ${website_version}
# echo ${website_version_raw}

if [ -n ${website_version} ]
then
	version=${website_version}
fi

version_active_raw=$( gitea --version )
version_active=$( gitea --version | awk '{ print $3; exit }' )

echo "Website version: ${version}"
echo " Active version: ${version_active}"

if [ "${version}" == "${version_active}" ]
then
	echo "Both version strings are the same."
else
	echo "There are differences between the two version strings."
	echo "Start updating..."
	read -p "Are you sure? (y/N)" -n 1 -r
	echo   # (optional) move to a new line
	if [[ $REPLY =~ ^[YyJj]$ ]]
	then
		uri=${website_uri}/${version}/${file_prefix}-${version}-${file_suffix}
		mkdir -p ${temp_folder}
		cd ${temp_folder}
		wget -O ${file_gitea} --show-progress ${uri}
		wget -O ${file_gitea}.sha256 ${uri}.sha256

		# strip gitea

		sha256check=$( echo "$(cat ${file_gitea}.sha256 | awk '{ print $1 }') ${file_gitea}" | sha256sum --check )
		echo ${sha256check}
		check=$( echo ${sha256check} | awk '{ print $2 }' )
		if [ "${check}" == "OK" ]
		then
			echo "SHA256 was checked and verified OK"
			sudo install --owner=git --group=git --mode=755 --strip ${file_gitea} ${install_dir}

		else
			echo "There was a failure in the SHA256 file check."
		fi
		# remove local files:
		rm ${file_gitea} ${file_gitea}.sha256
		cd ..
		rmdir ${temp_folder}
	fi
fi

#echo active gitea version:
echo "Active gitea full version string:"
gitea --version
read -p "Restart the gitea service on the host? (y/N)" -n 1 -r
        echo   # (optional) move to a new line
if [[ $REPLY =~ ^[YyJj]$ ]]
then
	sudo systemctl restart gitea.service
	echo "gitea.service restarted."
fi