//! Command line entry: dispatch table, usage text and exit codes.
//!
//! Exit codes are fixed across every command: 0 success, 1 refusal or error,
//! 2 bad usage. Each command returns its code; nothing else calls `exit`.

module cli

// Read from VERSION at build time, so the binary and the manifest cannot drift.
pub const version = $embed_file('../../VERSION').to_string().trim_space()

const usage = 'koh ${version} — one SQLite file per repo, one line of history

usage: koh <command> [options]

  save, checkpoint, status, log, diff
  undo, revert, load
  flag, pluck, peek
  offer, steal, remote
  init, doctor, strip, migrate

run "koh help <command>" for one command\'s options.'

pub fn run(args []string) int {
	if args.len < 2 {
		eprintln(usage)
		return 2
	}
	match args[1] {
		'--version', '-v' {
			println('koh ${version}')
			return 0
		}
		'--help', '-h', 'help' {
			println(usage)
			return 0
		}
		else {
			eprintln('koh: unknown command "${args[1]}"')
			eprintln('run "koh --help" for the command list')
			return 2
		}
	}
}