2022-11-09 17:34:57 +01:00
#!/bin/sh
# Purpose {{{
## Create a temp file (to monitor) if an upgrade is available for GLPI Agent
## project on Github −
## It's based on .deb package installation to check the current version.
## It can also compare the current available version in APT repositories
## if "--repo" option is given.
## How-to use {{{
### 1. Needs releasetags script, in the same directory
### cf. https://git.ipr.univ-rennes1.fr/cellinfo/scripts/src/master/github/releasetags
# wget https://git.ipr.univ-rennes1.fr/cellinfo/scripts/raw/master/github/releasetags
### 2. Create a cron job, eg
#00 20 * * * root /opt/repos/ipr.scripts/github/check.glpi-agent.update
### 2-1 Create a cron job to compare the version available in a Debian repository
#00 20 * * * root /opt/repos/ipr.scripts/github/check.glpi-agent.update --repo
### 3. Monitor the temp file
# Or enable MAILTO in cronjob and edit the script to print a message.
# Or send a mail.
# …
## }}}
# }}}
# Vars {{{
PROGNAME=$(basename "${0}"); readonly PROGNAME
PROGDIR=$(readlink -m $(dirname "${0}")); readonly PROGDIR
ARGS="${*}"; readonly ARGS
readonly NBARGS="${#}"
[ -z "${DEBUG}" ] && DEBUG=1
## Export DEBUG for sub-script
export DEBUG
## Default values for some vars
### Don't use APT repository by default
readonly REPOSITORY_MODE_DEFAULT=1
readonly GLPI_AGENT_REPO_URL="https://github.com/glpi-project/glpi-agent"
readonly GLPI_AGENT_NEW_VERSION_FILE="/tmp/.github.glpi-agent.upgrade"
## Colors
readonly PURPLE='\033[1;35m'
readonly RED='\033[0;31m'
readonly RESET='\033[0m'
readonly COLOR_DEBUG="${PURPLE}"
# }}}
usage() { # {{{
cat <<- HELP
usage: $PROGNAME [-d|-h|-r]
Compare GLPI Agent installed version and latest one.
EXAMPLES
- Compare the current version installed from .deb file
${PROGNAME}
- Compare the current version from apt's repository
${PROGNAME} --repo
OPTIONS
-d,--debug
Enable debug messages.
-h,--help
Print this help message.
-r,--repo,--repository
Use GLPI Agent version from APT repository.
HELP
}
# }}}
debug_message() { # {{{
local_debug_message="${1}"
## Print message if DEBUG is enable (=0)
[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG −
unset local_debug_message
return 0
}
# }}}
error_message() { # {{{
local_error_message="${1}"
local_error_code="${2}"
## Print message
printf '%b\n' "ERROR −
unset local_error_message
exit "${local_error_code:=66}"
}
# }}}
define_vars() { # {{{
## If repository_mode wasn't defined (argument) {{{
if [ -z "${repository_mode}" ]; then
## Use default value
readonly repository_mode="${REPOSITORY_MODE_DEFAULT}"
fi
# }}}
}
# }}}
is_var_empty() { # {{{
## Return False by default
return_var_empty="1"
## Total number of variables to test
local_total_var="${#}"
loop_count_var_empty="0"
## While it remains a variable to test
while [ "${local_total_var}" -gt "${loop_count_var_empty}" ]; do
debug_message "is_var_empty −
Test var: ${1}."
### Test if this is empty and set return value to True
[ -z "${1}" ] && return_var_empty="0"
### Increase the number of tested variables
loop_count_var_empty=$((loop_count_var_empty+1))
### Shift to the next variable
shift
done
unset local_total_var
unset loop_count_var_empty
return "${return_var_empty}"
}
# }}}
main() { # {{{
## Define all vars
define_vars
## Get current version from APT repository or from .deb package {{{
if [ "${repository_mode}" -eq "0" ]; then
debug_message "--- MAIN Check current version from ${RED}APT repositories${COLOR_DEBUG}."
glpi_agent_current_version=$(apt-cache policy glpi-agent \
| awk '/Candidate:/ {print $2}' \
| sed 's/.:\(.*\)-.*/\1/')
else
debug_message "--- MAIN Check current version from ${RED}manually installed .deb package${COLOR_DEBUG}."
glpi_agent_current_version=$(dpkg -l glpi-agent \
| awk '/^ii.*glpi-agent/ {print $3}' \
| sed 's/.:\(.*\)-.*/\1/')
fi
## }}}
## Get latest version from project repository {{{
### OR Exit with error message
debug_message "--- MAIN Check latest version from project repository (${RED}${GLPI_AGENT_REPO_URL}${COLOR_DEBUG})."
glpi_agent_latest_version=$("${PROGDIR}/releasetags" "${GLPI_AGENT_REPO_URL}" | head --lines=1 \
|| error_message "Can't get latest GLPI Agent version from repository (${GLPI_AGENT_REPO_URL})." 02 )
## }}}
## If any of the two variables is empty {{{
### OR Exit with error message
is_var_empty "${glpi_agent_current_version}" "${glpi_agent_latest_version}" \
&& error_message "At least one variable is empty (current version
## }}}
# Check if the current version is the last one {{{
## If the two versions are the same {{{
if [ "${glpi_agent_current_version}" = "${glpi_agent_latest_version}" ]; then
debug_message "Test version −
The current GLPI Agent version (${RED}${glpi_agent_current_version}${COLOR_DEBUG}) is up-to-date."
### Ensure to remove any temp file
rm --force -- "${GLPI_AGENT_NEW_VERSION_FILE}"
exit 0
## }}}
## If the versions are different {{{
else
debug_message "Test version −
Current version (${RED}${glpi_agent_current_version}${COLOR_DEBUG}) and latest one (${RED}${glpi_agent_latest_version}${COLOR_DEBUG}) seems to be different."
## Create a temp file to monitor
touch -- "${GLPI_AGENT_NEW_VERSION_FILE}"
2023-01-27 22:07:06 +01:00
debug_message "An upgrade is available for GLPI Agent (current
2022-11-09 17:34:57 +01:00
exit 0
fi
## }}}
# }}}
}
# }}}
# Manage arguments # {{{
# This code can't be in a function due to argument management
if [ ! "${NBARGS}" -eq "0" ]; then
manage_arg="0"
## If the first argument is not an option
if ! printf -- '%s' "${1}" | grep -q -E -- "^-+";
then
## Print help message and exit
printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
printf '%b\n' "---"
usage
exit 1
fi
# Parse all options (start with a "-") one by one
while printf -- '%s' "${1}" | grep -q -E -- "^-+"; do
case "${1}" in
--debug ) ## debug
DEBUG=0
debug_message "--- Manage argument BEGIN"
;;
-h|--help ) ## help
usage
## Exit after help informations
exit 0
;;
-r|--repo|--repository ) ## Set repository_mode
repository_mode=0
;;
* ) ## unknow option
printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
printf '%b\n' "---"
usage
exit 1
;;
esac
debug_message "| ${RED}${1}${COLOR_DEBUG} option managed."
## Move to the next argument
shift
manage_arg=$((manage_arg+1))
done
debug_message "| ${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
else
debug_message "| No arguments/options to manage."
fi
debug_message "--- Manage argument END"
# }}}
main
exit 255
