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+#!/bin/bash
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+
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+# Version 0.1 - initial start of this localcheck
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+
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+# Installation
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+# This file should be place on a/the Gogs (https://gogs.io) host in /usr/lib/check_mk_agent/local
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+#
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+# (optional) if you want the check to run on a different schedule (like once per hour) put it in a subdirectory of above path
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+# named to the number of seconds of the interval wanted, so 3600/ for once an hour, 86400/ for once per day.
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+#
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+# Also do not forget to make this file executable with chmod +x /usr/lib/check_mk_agent/local/gogs-version.sh
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+
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+# (c) Michael Honkoop <mhonkoop@comsolve.nl>
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+
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+# License: GNU General Public License v2
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+
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+######################
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+# Configurable Parameters
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+######################
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+
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+# url to check releases against
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+RELEASEURL="https://api.github.com/repos/gogs/gogs/releases"
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+
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+# basepath of where gogs is installed
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+BASEPATH="/opt/gogs/"
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+
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+######################
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+# The code below should not be changed, unless you know EXACTLY what you are doing.
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+# All configureable parameters are above this section.
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+######################
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+
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+# check if jq package is present on the system (required for this check)
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+command -v jq >/dev/null 2>&1
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+if [ $? -ne 0 ]; then
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+ echo "2 \"Gogs\" - Gogs localcheck requires jq package to be installed"
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+ exit 0
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+fi
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+
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+# binary path
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+GOGS_BIN="${BASEPATH}/gogs"
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+
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+# Check Gogs binary presence and report if not found
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+if [[ ! -x "$GOGS_BIN" ]]; then
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+ echo "2 \"$SERVICE\" - Gogs executable not found: $GOGS_BIN check localcheck configuration."
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+ exit 0
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+fi
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+
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+# Get current installed Gogs version-information
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+GOGS_INSTALLED=$("$GOGS_BIN" --version | sed -nE 's/.*version ([0-9]+\.[0-9]+\.[0-9]+).*/\1/p')
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+
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+# Get latest avaiable version information.
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+GOGS_AVAILABLE=$(curl -fsSL -H 'Accept: application/vnd.github+json' "$RELEASEURL" | jq -er 'map(select(.draft == false and .prerelease == false)) | .[0].tag_name' | sed 's/^v//')
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+
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+# Return status when latest version information could not be retrieved.
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+if [[ -z "$GOGS_AVAILABLE" || "$GOGS_AVAILABLE" == "null" ]]; then
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+ echo "1 \"Gogs\" - No data received from release-URL, can not determine latest release-version."
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+ exit 0
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+fi
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+
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+# Compare installed version to available version
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+if [[ "$GOGS_INSTALLED" == "$GOGS_AVAILABLE" ]]; then
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+ echo "0 \"Gogs\" - Gogs version $GOGS_INSTALLED is up to date."
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+elif [[ "$(printf '%s\n' "$GOGS_INSTALLED" "$GOGS_AVAILABLE" | sort -V | tail -n1)" == "$GOGS_AVAILABLE" ]]; then
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+ echo "1 \"Gogs\" - Update available: $GOGS_INSTALLED -> $GOGS_AVAILABLE"
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+ exit 0
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+fi
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