A Node.js implementation of https://github.com/connorworley/dotfiles/blob/master/.bin/brew-autoremove

brew-autoremove

#!/usr/bin/env node
'use strict';

/*
  A Node.js implementation of
  https://github.com/connorworley/dotfiles/blob/master/.bin/brew-autoremove
*/

const child = require('child_process');
const util = require('util');

childExec = util.promisify(child.exec);

function readKey() {
  return new Promise(resolve => {
    const proc = child.spawn('read -n 1 -r && echo $REPLY', [], {
      shell: true,
      stdio: ['inherit', 'pipe', 'pipe']
    })

    let stdout = '';

    proc.stdout.on('data', chunk => {
      stdout += chunk.toString();
    })

    proc.on('exit', () => {
      resolve(stdout.trim());
    });
  });
}

async function exec(proc) {
  const res = await childExec(proc);
  return res.stdout.split('\n').filter(v => v);
}

const visited = {};

async function check_formulas(...formulas) {
  visited['brew cask'] = true;
  for (const formula of formulas) {
    dependees = await exec(`brew uses --installed ${formula}`);
    if (!dependees.length && !visited[formula]) {
      process.stdout.write(`${formula} has no dependees, remove? [Y/n] `);
      const ans = await readKey();
      console.log();
      visited[formula] = true;
      if (!ans.match(/n/i)) {
        console.log(`Removing ${formula}...`);
        await childExec(`brew remove ${formula}`);
        await check_formulas(...(await exec(`brew deps --1 --installed ${formula}`)));
      }
    }
  }
}

async function main() {
  await check_formulas(...(await exec('brew list')));
}

main().catch(err => {
  console.error(err);
  process.exitCode = 1;
});