feat: database migrations and scripts

migrations/20230826205932_create_subscriptions_table.sql

@@ -0,0 +1,9 @@
+-- Add migration script here
+-- Create Subscriptions Table
+CREATE TABLE subscriptions(
+    id uuid NOT NULL,
+    PRIMARY KEY (id),
+    email TEXT NOT NULL UNIQUE,
+    name TEXT NOT NULL,
+    subscribed_at timestamptz NOT NULL
+);

scripts/init_db.sh

@@ -0,0 +1,43 @@
+#!/usr/bin/env bash
+set -x
+set -eo pipefail
+
+
+# Dwependencies check
+if ! [ -x "$(command -v psql)" ]; then
+    echo >&2 "Error: psql is not installed."
+    exit 1
+fi
+if ! [ -x "$(command -v sqlx)" ]; then
+    echo >&2 "Error: sqlx is not installed."
+    echo >&2 "Use:"
+    echo >&2 " cargo install --version=0.5.7 sqlx-cli --no-default-features --features postgres"
+    echo >&2 "to install it."
+    exit 1
+fi
+
+# Check if a custom user has been set, otherwise default to 'postgres'
+DB_USER="${POSTGRES_USER:=postgres}"
+# Check if a custom password has been set, otherwise default to 'password'
+DB_PASSWORD="${POSTGRES_PASSWORD:=password}"
+# Check if a custom database name has been set, otherwise default to 'newsletter'
+DB_NAME="${POSTGRES_DB:=newsletter}"
+# Check if a custom port has been set, otherwise default to '5432'
+DB_PORT="${POSTGRES_PORT:=5432}"
+# Launch postgres using Docker
+docker run  -e POSTGRES_USER=${DB_USER}  -e POSTGRES_PASSWORD=${DB_PASSWORD}  -e POSTGRES_DB=${DB_NAME} -p "${DB_PORT}":5432  -d postgres  postgres -N 1000
+# ^ Increased maximum number of connections for testing purposes
+
+# Keep pinging Postgres until it's ready to accept commands
+export PGPASSWORD="${DB_PASSWORD}"
+until psql -h "localhost" -U "${DB_USER}" -p "${DB_PORT}" -d "postgres" -c '\q'; do
+    >&2 echo "Postgres is still unavailable - sleeping"
+    sleep 1
+done
+>&2 echo "Postgres is up and running on port ${DB_PORT}!"
+
+export DATABASE_URL=postgres://${DB_USER}:${DB_PASSWORD}@localhost:${DB_PORT}/${DB_NAME}
+sqlx database create
+sqlx migrate run
+
+>&2 echo "Postgres has been migrated, ready to go!"