docker-compose.yml

###############################################################################
# Spidder — development stack (hot reload).
#
#   docker compose up --build
#
# This is the DEFAULT compose file, so development — the thing done many times
# a day — needs no -f flag. Deployment is the rare, deliberate act, and it is
# the one that spells out its file:
#
#   docker-compose.yml       THIS FILE — hot-reload dev stack, everything in
#                            containers including Postgres and Redis
#   docker-compose.prod.yml  a real deployment on a real server: images pulled
#                            from Docker Hub, Postgres and Redis on the host
#
# Same topology as production, but every app runs from its Dockerfile.dev with
# the repo bind-mounted over /app, so edits on the host hot-reload inside the
# container (tsx watch for the services, next dev for the web app).
#
# Open http://localhost:3001
#
# The `node_modules` anonymous volumes are load-bearing: they shadow the host's
# node_modules so the container keeps its own linux-native install rather than
# the host's (possibly different-arch) one.
###############################################################################

# Distinct from the prod stack's `spidder`, so a local stack and a deployment on
# the same machine never adopt each other's containers or volumes.
name: spidder-dev

x-app-env: &app-env
  NODE_ENV: development
  DATABASE_URL: postgresql://postgres:postgres@postgres:5432/spidder?schema=public
  REDIS_URL: redis://redis:6379
  PISTON_URL: http://piston:2000/api/v2
  JWT_SECRET: ${JWT_SECRET:-dev-secret-change-me-in-production}
  CORS_ORIGINS: ${CORS_ORIGINS:-http://localhost:3001}

services:
  # --- infrastructure ------------------------------------------------------
  postgres:
    image: postgres:16-alpine
    restart: unless-stopped
    environment:
      POSTGRES_USER: postgres
      POSTGRES_PASSWORD: postgres
      POSTGRES_DB: spidder
    # Bound to loopback, and overridable: a Postgres already running on the
    # host would otherwise make `compose up` fail with "address already in use".
    ports:
      - "127.0.0.1:${POSTGRES_PORT:-5432}:5432"
    volumes:
      - pgdata-dev:/var/lib/postgresql/data
    healthcheck:
      test: ["CMD-SHELL", "pg_isready -U postgres -d spidder"]
      interval: 5s
      timeout: 5s
      retries: 10

  redis:
    image: redis:7-alpine
    restart: unless-stopped
    ports:
      - "127.0.0.1:${REDIS_PORT:-6379}:6379"
    healthcheck:
      test: ["CMD", "redis-cli", "ping"]
      interval: 5s
      timeout: 3s
      retries: 10

  piston:
    image: ghcr.io/engineer-man/piston
    restart: unless-stopped
    privileged: true
    ports:
      - "${PISTON_PORT:-2000}:2000"
    volumes:
      - pistondata-dev:/piston
    healthcheck:
      # This image ships Node 15 — no global fetch, no curl, no wget. http.get
      # is the only probe available to us here.
      test:
        [
          "CMD",
          "node",
          "-e",
          "require('http').get('http://127.0.0.1:2000/api/v2/runtimes',r=>process.exit(r.statusCode===200?0:1)).on('error',()=>process.exit(1))",
        ]
      interval: 5s
      timeout: 5s
      retries: 20

  # --- one-shot initialisers ----------------------------------------------
  piston-init:
    image: alpine:3.20
    depends_on:
      piston:
        condition: service_healthy
    environment:
      PISTON_URL: http://piston:2000/api/v2
    volumes:
      - ./docker/piston-init/provision.sh:/provision.sh:ro
    entrypoint: ["/bin/sh", "/provision.sh"]
    restart: "no"

  db-init:
    build:
      context: .
      dockerfile: docker/db-init/Dockerfile
    depends_on:
      postgres:
        condition: service_healthy
    environment:
      DATABASE_URL: postgresql://postgres:postgres@postgres:5432/spidder?schema=public
    restart: "no"

  # --- application services (hot reload) -----------------------------------
  http-api:
    build:
      context: .
      dockerfile: apps/http-api/Dockerfile.dev
    restart: unless-stopped
    depends_on:
      postgres:
        condition: service_healthy
      db-init:
        condition: service_completed_successfully
    environment:
      <<: *app-env
      HTTP_API_HOST: 0.0.0.0
      HTTP_API_PORT: 4001
    ports:
      - "4001:4001"
    volumes:
      - .:/app
      # Keep the container's linux-native installs and build output.
      - /app/node_modules
      - /app/apps/http-api/node_modules
      - /app/packages/db/node_modules
      - /app/packages/db/generated

  ws-server:
    build:
      context: .
      dockerfile: apps/ws-server/Dockerfile.dev
    restart: unless-stopped
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
      db-init:
        condition: service_completed_successfully
    environment:
      <<: *app-env
      WS_SERVER_HOST: 0.0.0.0
      WS_SERVER_PORT: 4002
    ports:
      - "4002:4002"
    volumes:
      - .:/app
      - /app/node_modules
      - /app/apps/ws-server/node_modules
      - /app/packages/db/node_modules
      - /app/packages/db/generated

  judge-worker:
    build:
      context: .
      dockerfile: apps/judge-worker/Dockerfile.dev
    restart: unless-stopped
    depends_on:
      postgres:
        condition: service_healthy
      redis:
        condition: service_healthy
      db-init:
        condition: service_completed_successfully
      piston-init:
        condition: service_completed_successfully
    environment:
      <<: *app-env
      JUDGE_CONCURRENCY: ${JUDGE_CONCURRENCY:-4}
    volumes:
      - .:/app
      - /app/node_modules
      - /app/apps/judge-worker/node_modules
      - /app/packages/db/node_modules
      - /app/packages/db/generated

  web:
    build:
      context: .
      dockerfile: apps/web/Dockerfile.dev
    restart: unless-stopped
    depends_on:
      - http-api
      - ws-server
    environment:
      NODE_ENV: development
      PORT: 3001
      # Read at dev-server start; these are the URLs the BROWSER uses.
      NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL:-http://localhost:4001}
      NEXT_PUBLIC_WS_URL: ${NEXT_PUBLIC_WS_URL:-ws://localhost:4002/ws}
    ports:
      - "3001:3001"
    volumes:
      - .:/app
      - /app/node_modules
      - /app/apps/web/node_modules
      - /app/apps/web/.next

volumes:
  pgdata-dev:
  pistondata-dev: