git-diff-apply/src/get-sub-dir.js

Use an unrelated remote repository to apply a git diff

'use strict';

const path = require('path');
const { spawn } = require('./run');

module.exports = async function getSubDir(options) {
  // `git rev-parse --show-toplevel` won't work to determine root.
  // On GitHub Actions, `process.cwd()` returns 8.3 filenames,
  // ex. C:\Users\RUNNER~1\AppData\Local\Temp\...
  // https://github.com/ember-cli/ember-cli-update/pull/841/checks?check_run_id=360968913#step:6:329
  // and git returns a normal path. This makes the `path.relative`
  // not bahave as expected.
  let relative = (await spawn('git', ['rev-parse', '--show-cdup'], options)).trim();
  let subDir = path.relative(path.resolve(options.cwd, relative), options.cwd);
  return subDir;
};