#!/bin/sh
# Purpose {{{
## Create a temp file (to monitor) if an upgrade is available for Searx
## project on Github.
## It based on the searx's root directory to get the current version and
## supposed to be install from source (github).
## How-to use {{{
### 1. Needs releasetags script, in the same directory
### cf. https://git.101010.fr/gardouille-dotfiles/scripts/src/branch/master/github/releasetags
# wget https://git.101010.fr/gardouille-dotfiles/scripts/raw/branch/master/github/releasetags
### 2. Create a cron job with Searx directory as first argument, eg.
#00 20 * * * root /opt/repos/gardouille.scripts/github/check_searx_update /var/www/searx
### 3. Monitor the temp file : /tmp/.github.searx.upgrade
# Or enable MAILTO in cronjob and edit the script to print a message.
# Or send a mail.
# …
## }}}
# }}}

# Expect 1 argument {{{
if [ $# -ne 1 ]
then
	cat << HELP

check.searx.update  --
Compare current version of an installed Searx and the last available.

EXAMPLE :
    - Compare the current version installed in /var/www/searx.domain.tld
        check.searx.update /var/www/searx.domain.tld

HELP

	exit 1
fi

# }}}

# Vars {{{
DEBUG=1

script_wd=$(dirname "${0}")

searx_install_dir="${1}"
searx_current_version=$(cd "${searx_install_dir}" || exit 1 ; grep "\(VERSION_MAJOR\|VERSION_MINOR\|VERSION_BUILD\) =" searx/version.py | cut -d\= -f2 | sed -e 's/^[[:space:]]*//' | paste -sd "." - ; cd - > /dev/null || exit 1)

searx_repo_url="https://github.com/searx/searx"
searx_new_version=$("${script_wd}"/releasetags "${searx_repo_url}" | head -n1)

searx_new_version_file="/tmp/.github.searx.upgrade"
# }}}

# Check if the current version is the last one {{{
if [ "${searx_current_version}" != "${searx_new_version}" ]; then
	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — Current version (${searx_current_version}) and new one (${searx_new_version}) seems to be different."

	## Create a temp file to monitor
	touch -- "${searx_new_version_file}"
	printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for Searx (current : ${searx_current_version}) : ${searx_new_version}." >> "${searx_new_version_file}"

else
	[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6s\e[m\n' "DEBUG : Test version — The current version is up-to-date."
	rm -f -- "${searx_new_version_file}"
fi
# }}}

exit 0