update: postgres setup in flake

README.md

@@ -80,6 +80,13 @@ topos run
 nix develop .#poetry
 ```
 
+## Install Tips
+
+### POSTGRES 
+- If postgres is already running, running the bin fails, shut it down first.
+- Nix will manage postgres' start/stop function itself when you use it, but if you have started the database elsewhere, it won't be able to manage it, and will fail to start up.
+
+
 ## Install Instructions
 requires `brew install just`
 requires `brew install poetry`

flake.nix

@@ -68,7 +68,7 @@
 
             configFile = pkgs.copyPathToStore ./config.yaml;
             yq = pkgs.yq-go;
-
+            
             kafkaPreStartup = ''
             echo "Kafka is ready. Creating topic..."
             ${pkgs.apacheKafka}/bin/kafka-topics.sh --create --topic chat_topic --bootstrap-server localhost:9092 --partitions 1 --replication-factor 1 --if-not-exists

justfile

@@ -22,3 +22,8 @@ python:
 
 dmg:
     create-dmg topos.app --volicon "topos/assets/topos_blk_rounded.png" --icon "topos/assets/topos_blk_rounded.png"
+
+stoppg:
+    export PGDATA=$(pwd)/pgdata
+    echo "Stopping any existing PostgreSQL server..."
+    pg_ctl -D "$PGDATA" stop || echo "No existing server to stop."