Allow a flag to be hidden and hide the --disable-get-blobs-v2 flag.

changelog/manu_disable_get_blobs_v2_hidden.md

@@ -0,0 +1,2 @@
+### Removed
+- `--disable-get-blobs-v2` flag from help.

cmd/beacon-chain/flags/base.go

@@ -364,7 +364,8 @@ var (
 	}
 	// DisableGetBlobsV2 disables the engine_getBlobsV2 usage.
 	DisableGetBlobsV2 = &cli.BoolFlag{
-		Name:  "disable-get-blobs-v2",
-		Usage: "Disables the engine_getBlobsV2 usage.",
+		Name:   "disable-get-blobs-v2",
+		Usage:  "Disables the engine_getBlobsV2 usage.",
+		Hidden: true,
 	}
 )

cmd/beacon-chain/usage.go

@@ -246,10 +246,18 @@ func init() {
 	originalHelpPrinter := cli.HelpPrinter
 	cli.HelpPrinter = func(w io.Writer, tmpl string, data any) {
 		if tmpl == appHelpTemplate {
+			filteredGroups := make([]flagGroup, 0, len(appHelpFlagGroups))
 			for _, group := range appHelpFlagGroups {
-				sort.Sort(cli.FlagsByName(group.Flags))
+				visibleFlags := make([]cli.Flag, 0, len(group.Flags))
+				for _, flag := range group.Flags {
+					if vf, ok := flag.(cli.VisibleFlag); !ok || vf.IsVisible() {
+						visibleFlags = append(visibleFlags, flag)
+					}
+				}
+				sort.Sort(cli.FlagsByName(visibleFlags))
+				filteredGroups = append(filteredGroups, flagGroup{Name: group.Name, Flags: visibleFlags})
 			}
-			originalHelpPrinter(w, tmpl, helpData{data, appHelpFlagGroups})
+			originalHelpPrinter(w, tmpl, helpData{data, filteredGroups})
 		} else {
 			originalHelpPrinter(w, tmpl, data)
 		}