fix: return non-exit code when uc commands cancelled by not confirming prompt (fixes #354)

cmd/uncloud/caddy/deploy.go

@@ -175,8 +175,7 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 			return fmt.Errorf("confirm deployment: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Caddy deploy cancelled. No changes were made.")
 		}
 
 		err = progress.RunWithTitle(ctx, func(ctx context.Context) error {

cmd/uncloud/deploy.go

@@ -222,8 +222,7 @@ func runDeploy(ctx context.Context, uncli *cli.CLI, opts deployOptions) error {
 			return fmt.Errorf("confirm deployment: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Deploy cancelled. No changes were made.")
 		}
 	}
 

cmd/uncloud/machine/add.go

@@ -232,8 +232,7 @@ func add(ctx context.Context, uncli *cli.CLI, remoteMachine *cli.RemoteMachine,
 				return fmt.Errorf("confirm deployment: %w", err)
 			}
 			if !confirmed {
-				fmt.Println("Cancelled. No changes were made.")
-				return nil
+				return cli.Cancelled("Caddy deploy cancelled. The machine has been added to the cluster.")
 			}
 		}
 

cmd/uncloud/main.go

@@ -2,8 +2,10 @@ package main
 
 import (
 	"context"
+	"errors"
 	"fmt"
 	"net/netip"
+	"os"
 	"strings"
 
 	"charm.land/lipgloss/v2"
@@ -152,5 +154,11 @@ func main() {
 		volume.NewRootCommand(),
 		wg.NewRootCommand(),
 	)
-	cobra.CheckErr(cmd.Execute())
+	if err := cmd.Execute(); err != nil {
+		if cancelled, ok := errors.AsType[*cli.CancelledError](err); ok {
+			fmt.Fprintln(os.Stderr, cancelled.Error())
+			os.Exit(1)
+		}
+		cobra.CheckErr(err)
+	}
 }

cmd/uncloud/service/scale.go

@@ -155,8 +155,7 @@ func scale(ctx context.Context, uncli *cli.CLI, opts scaleOptions) error {
 			return fmt.Errorf("confirm scaling: %w", err)
 		}
 		if !confirmed {
-			fmt.Println("Cancelled. No changes were made.")
-			return nil
+			return cli.Cancelled("Scaling cancelled. No changes were made.")
 		}
 	}
 

internal/cli/errors.go

@@ -0,0 +1,15 @@
+package cli
+
+// CancelledError signals an interactive command was aborted by the user at a confirmation prompt.
+type CancelledError struct {
+	Message string
+}
+
+func (e *CancelledError) Error() string {
+	return e.Message
+}
+
+// Cancelled returns a CancelledError carrying the given user-facing message.
+func Cancelled(msg string) error {
+	return &CancelledError{Message: msg}
+}