feat: wait-for-postgres

Author: Bobagi

infra/compose.yaml

@@ -1,5 +1,6 @@
 services:
   database:
+    container_name: "postgres-dev"
     image: "postgres:16.0-alpine3.18"
     env_file:
       - ../.env.development

infra/scripts/wait-for-postgres.js

@@ -0,0 +1,27 @@
+require("dotenv").config({ path: ".env.development" });
+
+if (!process.env.POSTGRES_HOST) {
+  throw new Error("Environment variable POSTGRES_HOST is not defined");
+}
+
+const { exec } = require("node:child_process");
+
+function checkPostgres() {
+  exec(
+    `docker exec postgres-dev pg_isready --host ${process.env.POSTGRES_HOST}`,
+    handleReturn,
+  );
+
+  async function handleReturn(error, stdout) {
+    if (stdout.search("accepting connections") === -1) {
+      process.stdout.write("🟡");
+      await new Promise((resolve) => setTimeout(resolve, 1000));
+      return checkPostgres();
+    }
+
+    console.log("🟢 PostgreSQL is ready!");
+  }
+}
+
+console.log("🔴 Waiting for PostgreSQL to become available...");
+checkPostgres();

package.json

@@ -4,7 +4,7 @@
   "description": "Clone of tabs news project",
   "main": "index.js",
   "scripts": {
-    "dev": "npm run services:up && next dev",
+    "dev": "npm run services:up && npm run wait-for-postgres && npm run migration:up && next dev",
     "services:up": "docker compose -f infra/compose.yaml up -d",
     "services:down": "docker compose -f infra/compose.yaml down",
     "services:stop": "docker compose -f infra/compose.yaml stop",
@@ -13,7 +13,8 @@
     "test": "jest --runInBand",
     "test:watch": "jest --watchAll --runInBand",
     "migration:create": "node-pg-migrate --migrations-dir infra/migrations create",
-    "migration:up": "node-pg-migrate --migrations-dir infra/migrations --envPath .env.development up"
+    "migration:up": "node-pg-migrate --migrations-dir infra/migrations --envPath .env.development up",
+    "wait-for-postgres": "node infra/scripts/wait-for-postgres.js"
   },
   "author": "",
   "license": "MIT",
@@ -29,4 +30,4 @@
     "jest": "^29.6.2",
     "prettier": "^3.3.3"
   }
-}
+}