feat(utils, module-sdk, medusa): Extract pg connection utils to utils package (#4961)

packages/utils/src/modules-sdk/create-pg-connection.ts

@@ -0,0 +1,30 @@
+import knex from "knex"
+import { ModuleServiceInitializeOptions } from "@medusajs/types"
+
+type Options = ModuleServiceInitializeOptions["database"]
+
+/**
+ * Create a new knex (pg in the future) connection which can be reused and shared
+ * @param options
+ */
+export function createPgConnection(options: Options) {
+  const { pool, schema = "public", clientUrl, driverOptions } = options
+  const ssl = options.driverOptions?.ssl ?? false
+
+  return knex<any, any>({
+    client: "pg",
+    searchPath: schema,
+    connection: {
+      connectionString: clientUrl,
+      ssl,
+      idle_in_transaction_session_timeout:
+        (driverOptions?.idle_in_transaction_session_timeout as number) ??
+        undefined, // prevent null to be passed
+    },
+    pool: {
+      // https://knexjs.org/guide/#pool
+      ...(pool ?? {}),
+      min: (pool?.min as number) ?? 0,
+    },
+  })
+}

packages/utils/src/modules-sdk/index.ts

@@ -3,3 +3,4 @@ export * from "./decorators"
 export * from "./build-query"
 export * from "./retrieve-entity"
 export * from "./loaders/mikro-orm-connection-loader"
+export * from "./create-pg-connection"