fix postgres init script

lib.nix

@@ -66,6 +66,8 @@ in
       extra_config ? '''',
       package ? pkgs.postgresql,
       data_dir ? ".data/",
+      port ? 5432,
+      listen_addresses ? "localhost",
       ...
     }:
     let
@@ -83,7 +85,11 @@ in
           else
             { }
         )
-        // config;
+        // config
+        // {
+          unix_socket_directories = data_dir;
+          inherit port listen_addresses;
+        };
       toStr =
         value:
         if true == value then
@@ -102,15 +108,36 @@ in
           )
         );
       };
+      setupScript = pkgs.writeShellScript "setup-postgres" ''
+        set -euo pipefail
+        export PATH=${package}/bin:${pkgs.coreutils}/bin
+        POSTGRES_RUN_INITIAL_SCRIPT="false"
+        if [[ ! -d "${data_dir}" ]]; then
+          echo "Database directory does not exist. Initializing"
+          POSTGRES_RUN_INITIAL_SCRIPT="true"
+          ${package}/bin/initdb -D ${data_dir} --no-instructions
+        fi
+        cp ${configFile} ${data_dir}/postgresql.conf
+        if [[ "$POSTGRES_RUN_INITIAL_SCRIPT" == "true" ]]; then
+          echo "Running initial script"
+          pg_ctl -D "${data_dir}" -w start -o "-c unix_socket_directories=${data_dir} -c listen_addresses= -p ${lib.toString port}"
+          pg_ctl -D "${data_dir}" -m fast -w stop
+        else 
+          echo
+          echo "Database directory exists. Skipping initialization"
+          echo
+        fi
+
+        unset POSTGRES_RUN_INITIAL_SCRIPT
+      '';
+
       script = pkgs.writeShellApplication {
         name = "run-postgres";
         text = ''
-                  if [ ! -d "${data_dir}" ]; then
-                    echo "Database directory does not exist. Initializing"
-                    ${package}/bin/initdb -D ${data_dir} --no-instructions
-                  fi
+          set -euo pipefail
+          mkdir -p ${lib.escapeShellArg data_dir}
+          ${setupScript}/bin/setup-postgres
           ${package}/bin/postgres -D${data_dir} --config-file=${configFile}
-
         '';
       };
     in