Haszprus überblog

Haszprus überblog

This way you can develop your stuff in Docker through a mounted volume, and still see the changes in real-time.

Many thanks to Pas.

docker-compose.yml

# docker-compose.yml
services:
  db:
    # ...
  web:
    # ...
  next:
    build: nextjs-blog
    image: blog-next:latest
    container_name: blog-next
    depends_on:
      - db
    volumes:
      - ./nextjs-blog:/app
    ports:
      - "8101:3000"
    stdin_open: true
    tty: true
  proxy:
    # ...

Dockerfile

# nextjs-blog/Dockerfile:
FROM node:22

WORKDIR /app

CMD node npm-install.mjs && npm run dev

npm-install.mjs

# nextjs-blog/npm-install.mjs:
import {existsSync, readFileSync, writeFileSync} from 'fs';
import {spawn} from 'child_process'

import {createHash} from 'crypto'

const run = async () => {
    const child = spawn('sh', ['-c', 'npm install']);

    child.stdout.setEncoding('utf8');
    child.stdout.on('data', function(data) {
        console.log(data);
    });

    child.stderr.setEncoding('utf8');
    child.stderr.on('data', function(data) {
        console.log(data);
    });
    const p = new Promise((resolve, reject) => {
        child.on('exit', (code) => {
            if (code === 0) {
                resolve();
            } else {
                reject(new Error(`npm install failed with code ${code}`));
            }
        });
    });
    await p;
    return child;
}

const sha1 = (input) =>  createHash('sha1').update(input).digest('hex')

const getHash = () => {
    const packageJson = readFileSync('package.json', 'utf8');
    const packageLockJson = readFileSync('package-lock.json', 'utf8');
    return sha1(packageJson + packageLockJson);
};

const directoryExists = (path) => existsSync(path);
const fileExists = (path) => existsSync(path);
const readFile = (path) => readFileSync(path, 'utf8');

console.log("Hello, 33");

const main = async () => {
    if (directoryExists('node_modules')) {
        if (fileExists('node_modules/hash.txt') && fileExists('package-lock.json')) {
            console.log("Checking for hash, 37");
            const expectedHash = readFile('node_modules/hash.txt');
            const hash = getHash();

            if (hash === expectedHash) {
                console.log('No npm install needed');
                process.exit(0);
            }
        }

        console.log('npm install needed, 47');

        // npm install needed
        const npmInstall = await run();

        if (npmInstall.error) {
            console.error('Error occurred during npm install:', npmInstall.error);
            process.exit(1);
        }

        writeFileSync('node_modules/hash.txt', getHash());
    } else {
        console.error('Directory "node_modules" does not exist. Please run "npm install" first.');
        process.exit(1);
    }
}

main();

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