Matrix room server version checker

.checkroom.sh

#!/bin/bash
if [[ -z "$HOMESERVER" ]]; then
	echo "Please set the HOMESERVER environment variable to the C-S API URL (e.g. https://matrix.org)"
	exit 1
elif [[ -z "$ACCESS_TOKEN" ]]; then
	echo "Please set the ACCESS_TOKEN environment variable to your access token"
	exit 1
elif [[ -z "$1" ]]; then
	echo "Usage: $0 <alias without #>"
	exit 1
fi
AUTH="Authorization: Bearer $ACCESS_TOKEN"
VERBOSE=${VERBOSE:-false}
FED_TESTER=${FED_TESTER:-"https://fed.mau.dev"}
FED_CHECK_DIR=${FED_CHECK_DIR:-"/tmp/fedchecks"}
mkdir -p "$FED_CHECK_DIR"

room_alias="%23$1"
if $VERBOSE; then
	echo "Room Alias: #$1"
fi
room_id=$(curl -s "$HOMESERVER/_matrix/client/r0/directory/room/$room_alias" | jq -r '.room_id')
echo "Room ID: $room_id"
members=$(curl -H "$AUTH" -s "$HOMESERVER/_matrix/client/r0/rooms/$room_id/joined_members" | jq -r '.joined | keys[]')
servers_dup=$(echo "$members" | sed -E 's/@[^:]+:(.+)/\1/')
servers=$(echo "$servers_dup" | sort -u)

declare -A member_counts
for member_server in $servers_dup; do
	((member_counts[$member_server]++))
done

errors=0
error_members=0
declare -A versions
declare -A version_members
declare -a old_members

member_count=$(echo "$members" | wc -l)
echo "$member_count members"
server_count=$(echo "$servers" | wc -l)
echo "$server_count servers"
echo

for server in $servers; do
	if [[ ! -f "$FED_CHECK_DIR/$server.json" ]]; then
		curl -s "$FED_TESTER/$server" -o "$FED_CHECK_DIR/$server.json"
	fi
	err=$(cat "$FED_CHECK_DIR/$server.json" | jq -r '.Version.error')
	if [[ "$err" != "null" ]]; then
		if $VERBOSE; then
			echo "$server does not work"
		fi
		((errors++))
		((error_members+=member_counts[$server]))
	else
		software=$(cat "$FED_CHECK_DIR/$server.json" | jq -r '.Version.name')
		version=$(cat "$FED_CHECK_DIR/$server.json" | jq -r '.Version.version')
		if $VERBOSE; then
			echo "$server is $software v$version"
		fi
		cut_version=$(echo "$version" | awk '{print $1;}')
		((versions[$cut_version]++))
		((version_members[$cut_version]+=member_counts[$server]))
		if [[ $cut_version != 1.* ]]; then
			old_members+=($(echo "$members" | grep $server))
		fi
	fi
done

echo "Summary:"
echo "  $errors servers servers with $error_members members did not work"
for version in "${!versions[@]}"; do
	echo "  ${versions[$version]} servers with ${version_members[$version]} members on $version" >> /tmp/matrix-room-server-versions
done
cat /tmp/matrix-room-server-versions | sort -n -r
rm -f /tmp/matrix-room-server-versions
echo "Outdated members: ${old_members[@]}"

LICENSE

Copyright (c) 2020 Tulir Asokan

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.