func main()

in git-codereview/review.go [78:142]
55 lines of code
19 McCabe index (conditional complexity)

func main() {
	initFlags()

	if len(os.Args) < 2 {
		flags.Usage()
		exit(2)
	}
	command, args := os.Args[1], os.Args[2:]

	// NOTE: Keep this switch in sync with the list of commands above.
	var cmd func([]string)
	switch command {
	default:
		flags.Usage()
		exit(2) // avoid installing hooks.
	case "help":
		fmt.Fprintf(stdout(), help, progName)
		return // avoid installing hooks.
	case "hooks": // in case hooks weren't installed.
		installHook(args)
		return // avoid invoking installHook twice.

	case "branchpoint":
		cmd = cmdBranchpoint
	case "change":
		cmd = cmdChange
	case "gofmt":
		cmd = cmdGofmt
	case "hook-invoke":
		cmd = cmdHookInvoke
	case "mail", "m":
		cmd = cmdMail
	case "pending":
		cmd = cmdPending
	case "rebase-work":
		cmd = cmdRebaseWork
	case "reword":
		cmd = cmdReword
	case "submit":
		cmd = cmdSubmit
	case "sync":
		cmd = cmdSync
	case "sync-branch":
		cmd = cmdSyncBranch
	case "test-loadAuth": // for testing only.
		cmd = func([]string) { loadAuth() }
	}

	// Install hooks automatically, but only if this is a Gerrit repo.
	if haveGerrit() {
		// Don't pass installHook args directly,
		// since args might contain args meant for other commands.
		// Filter down to just global flags.
		var hookArgs []string
		for _, arg := range args {
			switch arg {
			case "-n", "-v":
				hookArgs = append(hookArgs, arg)
			}
		}
		installHook(hookArgs)
	}

	cmd(args)
}