Avoid creating go2rtc config multiple times

Dockerfile

@@ -207,6 +207,10 @@ FROM deps AS devcontainer
 # But start a fake service for simulating the logs
 COPY docker/fake_frigate_run /etc/s6-overlay/s6-rc.d/frigate/run
 
+# Create symbolic link to the frigate source code, as go2rtc's create_config.sh uses it
+RUN mkdir -p /opt/frigate \
+    && ln -svf /workspace/frigate/frigate /opt/frigate/frigate
+
 # Install Node 16
 RUN apt-get update \
     && apt-get install wget -y \

docker/rootfs/etc/s6-overlay/s6-rc.d/go2rtc/run

@@ -41,17 +41,19 @@ function get_ip_and_port_from_supervisor() {
     export FRIGATE_GO2RTC_WEBRTC_CANDIDATE_INTERNAL="${ip_address}:${webrtc_port}"
 }
 
-echo "[INFO] Preparing go2rtc config..." >&2
+if [[ ! -f "/dev/shm/go2rtc.yaml" ]]; then
+    echo "[INFO] Preparing go2rtc config..." >&2
 
-if [[ -n "${SUPERVISOR_TOKEN:-}" ]]; then
-    # Running as a Home Assistant add-on, infer the IP address and port
-    get_ip_and_port_from_supervisor
+    if [[ -n "${SUPERVISOR_TOKEN:-}" ]]; then
+        # Running as a Home Assistant add-on, infer the IP address and port
+        get_ip_and_port_from_supervisor
+    fi
+
+    python3 /usr/local/go2rtc/create_config.py
 fi
 
-raw_config=$(python3 /usr/local/go2rtc/create_config.py)
-
 echo "[INFO] Starting go2rtc..." >&2
 
 # Replace the bash process with the go2rtc process, redirecting stderr to stdout
 exec 2>&1
-exec go2rtc -config="${raw_config}"
+exec go2rtc -config=/dev/shm/go2rtc.yaml

docker/rootfs/usr/local/go2rtc/create_config.py

@@ -8,6 +8,7 @@ import yaml
 sys.path.insert(0, "/opt/frigate")
 from frigate.const import BIRDSEYE_PIPE, BTBN_PATH
 from frigate.ffmpeg_presets import parse_preset_hardware_acceleration_encode
+
 sys.path.remove("/opt/frigate")
 
 
@@ -95,5 +96,6 @@ if config.get("birdseye", {}).get("restream", False):
     else:
         go2rtc_config["streams"] = {"birdseye": ffmpeg_cmd}
 
-
-print(json.dumps(go2rtc_config))
+# Write go2rtc_config to /dev/shm/go2rtc.yaml
+with open("/dev/shm/go2rtc.yaml", "w") as f:
+    yaml.dump(go2rtc_config, f)