Running npm start for all projects in folder

index.ts

import { SH } from "./sh";
import { join } from "path";
import { readFileSync } from "fs";
import { platform, EOL } from "os";

const rootPath = join(__dirname, "vendors");
const sh = new SH(rootPath);
const os = platform();

const getDirs = async (rootPath: string): Promise<string[]> => {
  switch (os) {
    case "win32":
      return (await sh.trySh(`dir ${rootPath}`)).output[0]
        .trim()
        .split(EOL)
        .filter((x) => x.includes(`<DIR>`) && !x.includes("."))
        .map((x) => join(rootPath, x.split(" ").slice(-1)[0]));
    case "linux":
      return (await sh.trySh(`ls -d -A1 ${rootPath}/*/`)).output[0]
        .trim()
        .split(EOL);
    default:
      throw "not implemented";
  }
};

const setNodeVersionCommands = (node: string): string[] => {
  switch (os) {
    case "win32":
      return [`nvs add ${node}`, `nvs use ${node}`].map(
        (x) => `${x} >nul 2>&1`
      );
    case "linux":
      return [
        `source /home/maxim/.nvm/nvm.sh`,
        `nvm i ${node} >/dev/null 2>&1`,
      ];
    default:
      throw "not implemented";
  }
};

(async () => {
  // TODO: close chrome before running it (use `powershell -command "Get-Process chrome | ForEach-Object { $_.CloseMainWindow() | Out-Null}"` for cmd)
  const dirs = await getDirs(rootPath);
  for (const dirPath of dirs) {
    const {
      engines: { node, npm },
    } = JSON.parse(readFileSync(join(dirPath, "package.json"), "utf-8"));
    const commands = [
      ...setNodeVersionCommands(node),
      `npm --silent i -g npm@${npm}`,
      `npm --silent i`,
      `npm start --silent`,
    ];
    const result = await sh.trySh(commands.join(" && "), dirPath);
    const standardOutput = result.stdout.trim();
    if (standardOutput) {
      console.log(result.stdout.trim());
    }

    const errorOutput = result.stderr.trim();
    if (errorOutput) {
      console.error(`Error:`, errorOutput);
    }
  }
})();