94 lines
2.5 KiB
TypeScript
94 lines
2.5 KiB
TypeScript
/**
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* `wrnexus generate docker` — scaffold containerization for a WrNexus app:
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* a multi-stage Dockerfile (build with Bun → slim runtime), a .dockerignore,
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* and a docker-compose.yml (app + Postgres). Uses the app's `/healthz` endpoint
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* for the container health check.
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*/
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import { existsSync, writeFileSync } from "node:fs";
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import { join, resolve } from "node:path";
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const DOCKERFILE = `# syntax=docker/dockerfile:1
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# --- build stage: install deps + produce dist/server.js ---
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FROM oven/bun:1 AS build
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WORKDIR /app
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COPY package.json bun.lock* bun.lockb* ./
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RUN bun install
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COPY . .
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RUN bun run build
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# --- runtime stage: slim image with only the built server + migrations ---
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FROM oven/bun:1-slim AS runtime
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WORKDIR /app
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ENV NODE_ENV=production
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ENV PORT=3000
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COPY --from=build /app/dist ./dist
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COPY --from=build /app/app/db/migrations ./app/db/migrations
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EXPOSE 3000
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HEALTHCHECK --interval=30s --timeout=3s --retries=3 \\
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CMD bun -e "fetch('http://localhost:'+(process.env.PORT||3000)+'/healthz').then(r=>process.exit(r.ok?0:1)).catch(()=>process.exit(1))"
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CMD ["bun", "dist/server.js"]
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`;
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const DOCKERIGNORE = `node_modules
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dist
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**/.wrnexus
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.git
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*.log
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*.db
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*.db-shm
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*.db-wal
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.DS_Store
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`;
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const COMPOSE = `services:
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app:
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build: .
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ports:
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- "3000:3000"
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environment:
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NODE_ENV: production
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PORT: "3000"
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DATABASE_URL: postgres://wrn:wrn@db:5432/app
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depends_on:
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db:
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condition: service_healthy
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restart: unless-stopped
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db:
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image: postgres:16-alpine
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environment:
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POSTGRES_USER: wrn
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POSTGRES_PASSWORD: wrn
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POSTGRES_DB: app
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healthcheck:
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test: ["CMD-SHELL", "pg_isready -U wrn -d app"]
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interval: 3s
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timeout: 3s
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retries: 20
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volumes:
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- pgdata:/var/lib/postgresql/data
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volumes:
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pgdata:
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`;
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function writeIfAbsent(path: string, content: string, name: string): void {
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if (existsSync(path)) {
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console.warn(` • ${name} already exists — skipped`);
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return;
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}
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writeFileSync(path, content, "utf8");
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console.log(` ✓ ${name}`);
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}
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/** Scaffold Dockerfile, .dockerignore, and docker-compose.yml into `appRoot`. */
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export function generateDocker(appRoot: string): void {
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const root = resolve(appRoot);
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console.log("Scaffolding containerization:");
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writeIfAbsent(join(root, "Dockerfile"), DOCKERFILE, "Dockerfile");
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writeIfAbsent(join(root, ".dockerignore"), DOCKERIGNORE, ".dockerignore");
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writeIfAbsent(join(root, "docker-compose.yml"), COMPOSE, "docker-compose.yml");
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console.log("\nBuild + run: docker compose up --build");
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}
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