X-Git-Url: http://git.giacomolli.uk/onechat/blobdiff_plain/0a98ccb67c3df55c0fe6d76b45afcbaa58c2eda1..459656ed8c15847d325f07758e4a775935411c3d:/main.go

diff --git a/main.go b/main.go
index f2c263d..04b0677 100644
--- a/main.go
+++ b/main.go
@@ -9,6 +9,19 @@ import (
 	"syscall"
 )
 
+// usage is the help text of the command.
+const usage = `Usage: onechat [COMMAND]
+
+Commands:
+  chat                     talk to the agent in this terminal (default)
+  daemon                   run the agent, Telegram, and WhatsApp
+  login                    log in to ChatGPT with a device code
+  probe LOG COUNT [BUILDS] measure the compactor on a log, with real calls
+  help                     show this help
+
+Chat needs a running daemon. ONECHAT_DIR sets the data directory.
+`
+
 func main() {
 	err := run()
 	if err != nil {
@@ -23,8 +36,8 @@ func run() error {
 
 	args := os.Args[1:]
 	switch {
-	case len(args) == 0:
-		_, err := fmt.Println("onechat")
+	case len(args) == 1 && (args[0] == "help" || args[0] == "--help" || args[0] == "-h"):
+		_, err := fmt.Print(usage)
 		if err != nil {
 			return err
 		}
@@ -37,7 +50,7 @@ func run() error {
 	// result does not include ctx.Err().
 	case len(args) == 1 && args[0] == "daemon":
 		return daemon(ctx, os.Stdout)
-	case len(args) == 1 && args[0] == "chat":
+	case len(args) == 0 || len(args) == 1 && args[0] == "chat":
 		return terminal(ctx, os.Stdin, os.Stdout)
 	case len(args) > 0 && args[0] == "probe":
 		err := probe(ctx, args[1:], os.Stdout)
@@ -45,7 +58,7 @@ func run() error {
 			return err
 		}
 	default:
-		return fmt.Errorf("unknown command %q", strings.Join(args, " "))
+		return fmt.Errorf("unknown command %q\n\n%s", strings.Join(args, " "), strings.TrimSuffix(usage, "\n"))
 	}
 
 	return ctx.Err()