//! Refuse repository commands until a Koh 2 repository has been migrated.
module cli

import os

pub fn needs_migration(argv []string) bool {
	if argv.len < 2 || argv[1] in ['migrate', 'man', 'help', '--help', '-h', '--version', '-v',
		'remote', 'update'] {
		return false
	}
	return inside_koh2_repo(os.getwd())
}

// inside_koh2_repo looks upward for a `.koh` that is a directory. A `.koh`
// file is Koh 3's.
fn inside_koh2_repo(start string) bool {
	mut dir := os.real_path(start)
	for {
		path := os.join_path(dir, '.koh')
		if os.is_dir(path) {
			return true
		}
		if os.is_file(path) {
			return false
		}
		parent := os.dir(dir)
		if parent == dir || parent == '' {
			return false
		}
		dir = parent
	}
	return false
}