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matrix/discord-bridge/install-presence.sh
T
jaredandClaude Opus 5.5 f8f0ca4549
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discord-bridge: Discord presence into Matrix ghosts
mautrix-discord doesn't bridge presence. lotus_presence.py watches the Discord
server (a second gateway session on the bridge's own bot, Guilds + Presence
intents only) and sets presence and a status message on each @discord_* ghost:
online / idle / DND / offline -> online / unavailable / msc3026 busy / offline;
custom status and the first activity become the status message.

Its own appservice registration is non-exclusive on the ghost namespace, so it
can update ghosts but not create them. Synapse drops an unrefreshed user to
offline after about a minute, so live states are re-sent every 20 s; if the
service dies, ghosts go offline rather than stale. The installer generates the
credentials on the server and doesn't restart Synapse. Statuses and activities
are never logged.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PPmy3tPq869XDW4njjVaKA
2026-11-04 19:36:38 -05:00

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#!/bin/bash
# One-time install of the Discord presence service (lotus_presence.py).
# Run on LXC 151 with this repo's main branch pulled to /opt/matrix-config:
# bash /opt/matrix-config/discord-bridge/install-presence.sh
# Generates its own appservice credentials on this machine and never prints them.
# Does NOT restart Synapse: until you do, Discord works but Matrix answers 401.
# Safe to re-run: existing credentials are kept.
set -euo pipefail
REPO=/opt/matrix-config
REG=/etc/matrix-synapse/discord-presence-registration.yaml
ENV_FILE=/etc/lotus-presence/env
HS=/etc/matrix-synapse/homeserver.yaml
install -d -m750 -o root -g mautrix-discord /etc/lotus-presence
install -D -m644 "$REPO/discord-bridge/lotus_presence.py" /opt/lotus-presence/lotus_presence.py
if [ ! -f "$ENV_FILE" ]; then
AS_TOKEN="$(openssl rand -hex 32)"
HS_TOKEN="$(openssl rand -hex 32)"
(umask 027; printf 'AS_TOKEN=%s\n' "$AS_TOKEN" > "$ENV_FILE")
chown root:mautrix-discord "$ENV_FILE"
(umask 027; cat > "$REG" <<YAML
# Discord presence service. Non-exclusive on the ghost namespace: it updates
# presence on ghosts the text bridge owns, and cannot create them.
id: lotus-discord-presence
url: null
as_token: $AS_TOKEN
hs_token: $HS_TOKEN
sender_localpart: discordpresence
rate_limited: false
namespaces:
users:
- regex: '^@discord_[0-9]+:matrix\.lotusguild\.org$'
exclusive: false
rooms: []
aliases: []
YAML
)
chown root:matrix-synapse "$REG"
echo "generated appservice credentials"
else
echo "keeping existing credentials"
fi
if ! grep -qF "$REG" "$HS"; then
cp -p "$HS" "$HS.bak-presence-$(date +%Y%m%d%H%M%S)"
sed -i "/^app_service_config_files:/a\\ - $REG" "$HS"
echo "added the registration to homeserver.yaml (takes effect on the next Synapse restart)"
fi
install -m644 "$REPO/systemd/lotus-discord-presence.service" /etc/systemd/system/lotus-discord-presence.service
systemctl daemon-reload
systemctl enable --now lotus-discord-presence
systemctl restart lotus-discord-presence
echo "installed. Restart Synapse once to activate the registration: systemctl restart matrix-synapse"