Delete all remote stale branches

del-remote-stale-branches.js

#!/usr/bin/env node
console.log(`*************************************************************************
* This script will 
* 1. Clean up local branches after merge and deleted (git remote prune origin)
* 2. Ask you to delete remote your stale branches that are
*  - more than 3 months old
*  - and, created by you
* To delete all users' stale branches, add --all at the end
************************************************************************`);
const execSync = require('child_process').execSync;
const inquirer = require('inquirer');

const allUsers = process.argv[2] === '--all';
console.log({allUsers});

// Clean up local branches after merge and deleted
const result1 = execSync('git remote prune origin', {encoding: 'utf8'});
console.log(result1);

const allBranches = execSync('git branch -r', {encoding: 'utf8'}).split('\n').map(el => el.trim());
// Current user name, that will be used to delete only your branches
const gitUserName = execSync('git config user.name', {encoding: 'utf8'});

// Get date 3 months ago
const maxDate = new Date( 
    new Date().getFullYear(), 
    new Date().getMonth() - 3, 
    new Date().getDate()
  ).toISOString().slice(0, 10)

allBranches.reduce( async (previousPromise, branch) => {
  const resp = await previousPromise;
  if (resp && resp.delete) {
    const command = `git push -d ${resp.branch.split('/').join(' ')}`;
    const result = execSync(command, {encoding: 'utf8'});
    console.log(result);
  }
  const command = `git log --no-merges -n 1 --format="%an|%cs" ${branch}`;
  const [userName, date] = execSync(command, {encoding: 'utf8'}).split('|');
  const userMatch = allUsers || (userName.trim() === gitUserName.trim());
  if (userMatch && date < maxDate) {
    const answers = await inquirer.prompt([{ 
      type: 'confirm', name: 'delete',
      message: `Delete ${branch} by ${userName} at ${date}`}
    ]);
    return Promise.resolve({delete: answers.delete, branch});
  } else {
    return Promise.resolve({});
  }
}, Promise.resolve());