pi-hole/advanced/Scripts/updatecheck.sh

#!/usr/bin/env bash
# Pi-hole: A black hole for Internet advertisements
# (c) 2017 Pi-hole, LLC (https://pi-hole.net)
# Network-wide ad blocking via your own hardware.
#
# Checks for local or remote versions and branches
#
# This file is copyright under the latest version of the EUPL.
# Please see LICENSE file for your rights under this license.

function get_local_branch() {
    # Return active branch
    cd "${1}" 2> /dev/null || return 1
    git rev-parse --abbrev-ref HEAD || return 1
}

function get_local_version() {
    # Return active branch
    cd "${1}" 2> /dev/null || return 1
    git describe --long --dirty --tags 2> /dev/null || return 1
}

# Source the setupvars config file
# shellcheck disable=SC1091
. /etc/pihole/setupVars.conf

# Source the utils file
# shellcheck disable=SC1091
. /opt/pihole/utils.sh

# Remove the below three legacy files if they exist
rm -f "/etc/pihole/GitHubVersions"
rm -f "/etc/pihole/localbranches"
rm -f "/etc/pihole/localversions"

# Create new versions file if it does not exist
VERSION_FILE="/etc/pihole/versions"
touch "${VERSION_FILE}"
chmod 644 "${VERSION_FILE}"

# if /pihole.docker.tag file exists, we will use it's value later in this script
DOCKER_TAG=$(cat /pihole.docker.tag 2>/dev/null)
regex='^([0-9]+\.){1,2}(\*|[0-9]+)(-.*)?$|(^nightly$)|(^dev.*$)'
if [[ ! "${DOCKER_TAG}" =~ $regex ]]; then
  # DOCKER_TAG does not match the pattern (see https://regex101.com/r/RsENuz/1), so unset it.
  unset DOCKER_TAG
fi

if [[ "$2" == "remote" ]]; then

    if [[ "$3" == "reboot" ]]; then
        sleep 30
    fi

    GITHUB_CORE_VERSION="$(curl -s 'https://api.github.com/repos/pi-hole/pi-hole/releases/latest' 2> /dev/null | jq --raw-output .tag_name)"
    addOrEditKeyValPair "${VERSION_FILE}" "GITHUB_CORE_VERSION" "${GITHUB_CORE_VERSION}"

    if [[ "${INSTALL_WEB_INTERFACE}" == true ]]; then
        GITHUB_WEB_VERSION="$(curl -s 'https://api.github.com/repos/pi-hole/AdminLTE/releases/latest' 2> /dev/null | jq --raw-output .tag_name)"
        addOrEditKeyValPair "${VERSION_FILE}" "GITHUB_WEB_VERSION" "${GITHUB_WEB_VERSION}"
    fi

    GITHUB_FTL_VERSION="$(curl -s 'https://api.github.com/repos/pi-hole/FTL/releases/latest' 2> /dev/null | jq --raw-output .tag_name)"
    addOrEditKeyValPair "${VERSION_FILE}" "GITHUB_FTL_VERSION" "${GITHUB_FTL_VERSION}"

    if [[ "${DOCKER_TAG}" ]]; then
        GITHUB_DOCKER_VERSION="$(curl -s 'https://api.github.com/repos/pi-hole/docker-pi-hole/releases/latest' 2> /dev/null | jq --raw-output .tag_name)"
        addOrEditKeyValPair "${VERSION_FILE}" "GITHUB_DOCKER_VERSION" "${GITHUB_DOCKER_VERSION}"
    fi

else

    CORE_BRANCH="$(get_local_branch /etc/.pihole)"
    addOrEditKeyValPair "${VERSION_FILE}" "CORE_BRANCH" "${CORE_BRANCH}"

    if [[ "${INSTALL_WEB_INTERFACE}" == true ]]; then
        WEB_BRANCH="$(get_local_branch /var/www/html/admin)"
        addOrEditKeyValPair "${VERSION_FILE}" "WEB_BRANCH" "${WEB_BRANCH}"
    fi

    FTL_BRANCH="$(pihole-FTL branch)"
    addOrEditKeyValPair "${VERSION_FILE}" "FTL_BRANCH" "${FTL_BRANCH}"

    CORE_VERSION="$(get_local_version /etc/.pihole)"
    addOrEditKeyValPair "${VERSION_FILE}" "CORE_VERSION" "${CORE_VERSION}"

    if [[ "${INSTALL_WEB_INTERFACE}" == true ]]; then
        WEB_VERSION="$(get_local_version /var/www/html/admin)"
        addOrEditKeyValPair "${VERSION_FILE}" "WEB_VERSION" "${WEB_VERSION}"
    fi

    FTL_VERSION="$(pihole-FTL version)"
    addOrEditKeyValPair "${VERSION_FILE}" "FTL_VERSION" "${FTL_VERSION}"

    if [[ "${DOCKER_TAG}" ]]; then
        addOrEditKeyValPair "${VERSION_FILE}" "DOCKER_VERSION" "${DOCKER_TAG}"
    fi

fi