Add script to verify AdGuard Home version and updates
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#!/bin/sh
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# Purpose {{{
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## Create a temp file (to monitor) if an upgrade is available for AdGuard Home
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## project on Github.
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## It's based on the AdGuard Home bin path to get the current version.
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## How-to use {{{
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### 1. Needs releasetags script, in the same directory
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### cf. https://git.101010.fr/gardouille-dotfiles/scripts/github/releasetags
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# wget https://git.101010.fr/gardouille-dotfiles/scripts/raw/branch/master/github/releasetags
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### 2. Create a cron job with AdGuard Home binary's path as first argument, eg.
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#00 20 * * * root /opt/repos/ipr.scripts/github/check_adguard_update --bin /opt/adguard/AdGuardHome/AdGuardHome
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### 3. Monitor the temp file : /tmp/.adguard.upgrade
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# Or enable MAILTO in cronjob and edit the script to print a message.
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# Or send a mail.
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# …
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## }}}
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# }}}
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# Vars {{{
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readonly PROGNAME=$(basename "${0}")
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readonly NBARGS="${#}"
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## Test if DEBUG is already defined (by parent script,…)
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[ -z "${DEBUG}" ] && DEBUG=1
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## Colors
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readonly PURPLE='\033[1;35m'
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readonly RED='\033[0;31m'
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readonly RESET='\033[0m'
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readonly COLOR_DEBUG="${PURPLE}"
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script_wd=$(dirname "${0}")
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adguard_repo_url="https://github.com/AdguardTeam/AdGuardHome"
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# }}}
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usage() { # {{{
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cat <<- EOF
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usage: $PROGNAME [-b|-d|-f|-h]
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Compare current version of an installed AdGuard Home bin and the last available.
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EXAMPLE :
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- Compare the current version of AdGuard Home with default bin
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check.adguard.update
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- Specify the path to AdGuardHome binary
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check.adguard.update --bin /home/adguard/AdGuardHome/AdGuardHome
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OPTIONS :
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-b,--bin
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Specify the path of AdGuard Home's binary
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(default: /opt/adguard/AdGuardHome/AdGuardHome).
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-f,--file
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Set the path to the temp file that will be create and
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that should be monitored (default: /tmp/.adguard.upgrade).
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-d,--debug
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Enable debug messages.
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-h,--help
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Print this help message.
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EOF
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}
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# }}}
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debug_message() { # {{{
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local_debug_message="${1}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '\e[1;35m%-6b\e[m\n' "DEBUG − ${PROGNAME} : ${local_debug_message}"
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return 0
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}
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# }}}
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error_message() { # {{{
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local_error_message="${1}"
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local_error_code="${2}"
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## Print message if DEBUG is enable (=0)
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[ "${DEBUG}" -eq "0" ] && printf '%b\n' "ERROR − ${PROGNAME} : ${RED}${local_error_message}${RESET}"
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exit "${local_error_code:=66}"
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}
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# }}}
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define_vars() { # {{{
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## If adguard_bin wasn't defined (argument,...) {{{
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if [ -z "${adguard_bin}" ]; then
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### Use default value
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adguard_bin="/opt/adguard/AdGuardHome/AdGuardHome"
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fi
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## }}}
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## If adguard_new_version_file wasn't defined (argument,...) {{{
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if [ -z "${adguard_new_version_file}" ]; then
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### Store it in /tmp directory
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adguard_new_version_file="/tmp/.adguard.upgrade"
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fi
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## }}}
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adguard_current_version=$(${adguard_bin} --version | \
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cut --delimiter=" " --field=4 --)
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adguard_new_version=$("${script_wd}"/releasetags "${adguard_repo_url}" | \
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grep --invert-match --extended-regexp -- '(dev|rc|-b.)' | \
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head --lines=1)
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}
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# }}}
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main() { # {{{
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## Define all vars according to selected options
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define_vars
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## Check if the current version is the last one {{{
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if [ "${adguard_current_version}" != "${adguard_new_version}" ]; then
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debug_message "Test AdGuard Home version − \
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Current version (${adguard_current_version}) and new one (${adguard_new_version}) seems to be different."
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## Create a temp file to monitor
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debug_message "Test AdGuard Home version − \
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Create ${adguard_new_version_file} temp file to monitore."
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touch -- "${adguard_new_version_file}"
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printf '\e[1;35m%-6s\e[m\n' "An upgrade is available for AdGuard Home (current : ${adguard_current_version}) : ${adguard_new_version}." >> "${adguard_new_version_file}"
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else
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debug_message "Test AdGuard Home version − \
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The current version (${adguard_current_version}) is up-to-date."
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rm --force -- "${adguard_new_version_file}"
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fi
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## }}}
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}
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# }}}
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# Manage arguments # {{{
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# This code can't be in a function due to arguments
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if [ ! "${NBARGS}" -eq "0" ]; then
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## If the first argument is not an option
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if ! printf -- '%s' "${1}" | grep --quiet --extended-regexp -- "^-+";
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then
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usage
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error_message "Unknown argument (${1}), check the help." 1
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fi
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manage_arg="0"
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# Parse all options (start with a "-") one by one
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while printf -- '%s' "${1}" | grep --quiet --extended-regexp -- "^-+"; do
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case "${1}" in
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-b|--bin ) ## Set binary's path
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## Move to the next argument
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shift
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## Define adguard_bin
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adguard_bin="${1}"
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;;
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-d|--debug ) ## debug
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DEBUG=0
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;;
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-h|--help ) ## help
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usage
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## Exit after help informations
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exit 0
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;;
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-f|--file ) ## Set temp file
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## Move to the next argument
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shift
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## Define adguard_new_version_file
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adguard_new_version_file="${1}"
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;;
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-- ) ## End of options list
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## End the while loop
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break
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;;
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* ) ## unknow option
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printf '%b\n' "${RED}Invalid option: ${1}${RESET}"
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printf '%b\n' "---"
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usage
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exit 1
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;;
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esac
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debug_message "Arguments management − \
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${RED}${1}${COLOR_DEBUG} option managed."
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## Move to the next argument
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shift
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manage_arg=$((manage_arg+1))
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done
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debug_message "Arguments management − \
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${RED}${manage_arg}${COLOR_DEBUG} argument(s) successfully managed."
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else
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debug_message "Arguments management − \
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No argument to manage."
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fi
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# }}}
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main
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exit 0
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