Shipfox Postgres

Thin wrapper around pg that centralizes connection config via environment variables and exposes a simple lifecycle API for shared pool usage.

It should be used with other packages from Shipfox.

What it does

• createPostgresClient(options?): Creates and stores a singleton pg.Pool configured from environment variables and optional overrides.
• pgClient(): Returns the previously created pool; throws if not initialized.
• closePostgresClient(): Closes and clears the pool.
• isPostgresHealthy(): Executes a lightweight SELECT 1 to report readiness.
• Re-exports all types/exports from pg for direct usage.

Environment variables (with defaults):

• POSTGRES_HOST (default: localhost)
• POSTGRES_PORT (default: 5432)
• POSTGRES_USERNAME (default: shipfox)
• POSTGRES_PASSWORD (default: password)
• POSTGRES_DATABASE (default: api)

Installation

pnpm add @shipfox/node-pg
# or
yarn add @shipfox/node-pg
# or
npm install @shipfox/node-pg

Usage

import {
  createPostgresClient,
  pgClient,
  closePostgresClient,
  isPostgresHealthy,
  type Pool,
} from "@shipfox/node-pg";

// 1) Create the pool at startup (optionally pass pg.PoolConfig overrides)
const pool: Pool = createPostgresClient({
  // connectionTimeoutMillis: 5000,
  // max: 10,
});

// 2) Use the pool elsewhere without passing it around
async function getServerTime() {
  const client = await pgClient().connect();
  try {
    const res = await client.query("SELECT NOW() AS now");
    return res.rows[0]?.now;
  } finally {
    client.release();
  }
}

// 3) Health check
async function ready() {
  return await isPostgresHealthy();
}

// 4) Clean shutdown
async function shutdown() {
  await closePostgresClient();
}

Configure via environment variables before starting your app:

export POSTGRES_HOST="127.0.0.1"
export POSTGRES_PORT="5432"
export POSTGRES_USERNAME="service_user"
export POSTGRES_PASSWORD="supersecret"
export POSTGRES_DATABASE="appdb"