24 lines
920 B
Bash
24 lines
920 B
Bash
#!/usr/bin/env bash
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# Shared mosquitto_pub/mosquitto_sub argument construction.
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# Passwords are read from a protected file rather than placed in .env or Git.
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mqtt_common_args() {
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MQTT_ARGS=(-h "$MQTT_HOST" -p "$MQTT_PORT")
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[[ -n "$MQTT_USERNAME" ]] && MQTT_ARGS+=(-u "$MQTT_USERNAME")
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if [[ -n "$MQTT_PASSWORD_FILE" ]]; then
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[[ -r "$MQTT_PASSWORD_FILE" ]] || die "MQTT password file is not readable: $MQTT_PASSWORD_FILE"
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MQTT_ARGS+=(-P "$(<"$MQTT_PASSWORD_FILE")")
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fi
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}
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mqtt_publish() {
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local topic="$1" payload="$2" retain="${3:-0}"
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[[ -n "$MQTT_HOST" ]] || die "MQTT_HOST is not configured"
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require_command mosquitto_pub
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mqtt_common_args
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# Backup state is retained so Home Assistant receives the latest result after
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# reconnecting. Command messages are handled separately and are never kept.
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(( retain )) && MQTT_ARGS+=(-r)
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mosquitto_pub "${MQTT_ARGS[@]}" -t "$topic" -m "$payload"
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}
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