pi-hole/advanced/Scripts/updatecheck.sh

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#!/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 updates via GitHub
#
# This file is copyright under the latest version of the EUPL.
# Please see LICENSE file for your rights under this license.
# Credit: https://stackoverflow.com/a/46324904
function json_extract() {
local key=$1
local json=$2
local string_regex='"([^"\]|\\.)*"'
local number_regex='-?(0|[1-9][0-9]*)(\.[0-9]+)?([eE][+-]?[0-9]+)?'
local value_regex="${string_regex}|${number_regex}|true|false|null"
local pair_regex="\"${key}\"[[:space:]]*:[[:space:]]*(${value_regex})"
if [[ ${json} =~ ${pair_regex} ]]; then
echo $(sed 's/^"\|"$//g' <<< "${BASH_REMATCH[1]}")
else
return 1
fi
}
GITHUB_CORE_VERSION="$(json_extract tag_name "$(curl -q 'https://api.github.com/repos/pi-hole/pi-hole/releases/latest' 2> /dev/null)")"
GITHUB_WEB_VERSION="$(json_extract tag_name "$(curl -q 'https://api.github.com/repos/pi-hole/AdminLTE/releases/latest' 2> /dev/null)")"
GITHUB_FTL_VERSION="$(json_extract tag_name "$(curl -q 'https://api.github.com/repos/pi-hole/FTL/releases/latest' 2> /dev/null)")"
echo "${GITHUB_CORE_VERSION} ${GITHUB_WEB_VERSION} ${GITHUB_FTL_VERSION}" > "/etc/pihole/GitHubVersions"
function get_local_branch() {
# Return active branch
local directory
directory="${1}"
local output
cd "${directory}" || return 1
# Store STDERR as STDOUT variable
output=$( { git rev-parse --abbrev-ref HEAD; } 2>&1 )
echo "$output"
return
}
CORE_BRANCH="$(get_local_branch /etc/.pihole)"
WEB_BRANCH="$(get_local_branch /var/www/html/admin)"
FTL_BRANCH="$(pihole-FTL tag)"
echo "${CORE_BRANCH} ${WEB_BRANCH} ${FTL_BRANCH}" > "/etc/pihole/localbranches"
function get_local_version() {
# Return active branch
local directory
directory="${1}"
local output
cd "${directory}" || return 1
# Store STDERR as STDOUT variable
output=$( { git describe --long --dirty --tags; } 2>&1 )
echo "$output"
return
}
CORE_VERSION="$(get_local_version /etc/.pihole)"
WEB_VERSION="$(get_local_version /var/www/html/admin)"
FTL_VERSION="$(pihole-FTL version)"
echo "${CORE_VERSION} ${WEB_VERSION} ${FTL_VERSION}" > "/etc/pihole/localversions"