1import { execSync } from 'child_process'
2
3export const getTarCmd = () => {
4  if (process.platform === 'darwin') {
5    try {
6      const gtarPath = execSync('which gtar', {encoding: 'utf8'}).trim()
7      return gtarPath
8    } catch {
9      throw new Error(
10        'GNU tar (gtar) not found on macOS. Install via Homebrew:\n' +
11        '  brew install gnu-tar\n' +
12        'GNU tar is required for --transform option used in docker builds.'
13      )
14    }
15  }
16  return 'tar'
17}
18