serve: --grasp-path (hidden).

serve.go

@@ -51,6 +51,12 @@ var serve = &cli.Command{
 			Name:  "grasp",
 			Usage: "enable grasp server",
 		},
+		&cli.StringFlag{
+			Name:      "grasp-path",
+			Usage:     "where to store the repositories",
+			TakesFile: true,
+			Hidden:    true,
+		},
 		&cli.BoolFlag{
 			Name:  "blossom",
 			Usage: "enable blossom server",
@@ -135,11 +141,14 @@ var serve = &cli.Command{
 		}
 
 		if c.Bool("grasp") {
+			repoDir = c.String("grasp-path")
+			if repoDir == "" {
 				var err error
 				repoDir, err = os.MkdirTemp("", "nak-serve-grasp-repos-")
 				if err != nil {
 					return fmt.Errorf("failed to create grasp repos directory: %w", err)
 				}
+			}
 			g := grasp.New(rl, repoDir)
 			g.OnRead = func(ctx context.Context, pubkey nostr.PubKey, repo string) (reject bool, reason string) {
 				log("    got %s %s %s\n", color.CyanString("git read"), pubkey.Hex(), repo)