start.js

#!/usr/bin/env node
const http = require('https');
const fs = require('fs');
const path = require('path');
const { spawn } = require('child_process');

const decompress = require('decompress');
const decompressTargz = require('decompress-targz');

const args = process.argv.slice(2);
const version = args[0] || '11.0.0';

const folder = 'server';
const fileName = path.join(folder, 'keycloak.tar.gz');
const serverPath = path.join(folder, `keycloak-${version}`);
const extension = process.platform === "win32" ? '.bat' : '.sh'

if (!fs.existsSync(folder)) {
  fs.mkdirSync(folder);
}

const decompressKeycloak = () =>
  decompress(fileName, folder, {
    plugins: [
      decompressTargz()
    ]
  }).then(() => {
    console.log('Files decompressed');
  }).catch(e => console.error(e));
;

const run = () => {
  const proc = spawn(path.join(serverPath, 'bin', `standalone${extension}`), ['-Djboss.socket.binding.port-offset=100']);
  proc.stdout.on('data', (data) => {
    console.log(data.toString());
  });
}

if (!fs.existsSync(fileName)) {
  const file = fs.createWriteStream(fileName);
  http.get(`https://downloads.jboss.org/keycloak/${version}/keycloak-${version}.tar.gz`, (response) => {
    response.pipe(file)
    response.on('end', () => {
      console.log('Downloaded keycloak');
      decompressKeycloak().then(() => run());
    });
  });
} else if (!fs.existsSync(serverPath)) {
  decompressKeycloak().then(() => run());
} else {
  run();
}