Miscellaneous Packages from Shared Into Proper Folders (#9638)

* slashutil

* builds

* interop

* viz

Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>

cmd/wrap_flags.go

@@ -0,0 +1,42 @@
+package cmd
+
+import (
+	"fmt"
+
+	"github.com/urfave/cli/v2"
+	"github.com/urfave/cli/v2/altsrc"
+)
+
+// WrapFlags so that they can be loaded from alternative sources.
+func WrapFlags(flags []cli.Flag) []cli.Flag {
+	wrapped := make([]cli.Flag, 0, len(flags))
+	for _, f := range flags {
+		switch t := f.(type) {
+		case *cli.BoolFlag:
+			f = altsrc.NewBoolFlag(t)
+		case *cli.DurationFlag:
+			f = altsrc.NewDurationFlag(t)
+		case *cli.GenericFlag:
+			f = altsrc.NewGenericFlag(t)
+		case *cli.Float64Flag:
+			f = altsrc.NewFloat64Flag(t)
+		case *cli.IntFlag:
+			f = altsrc.NewIntFlag(t)
+		case *cli.StringFlag:
+			f = altsrc.NewStringFlag(t)
+		case *cli.StringSliceFlag:
+			f = altsrc.NewStringSliceFlag(t)
+		case *cli.Uint64Flag:
+			f = altsrc.NewUint64Flag(t)
+		case *cli.UintFlag:
+			f = altsrc.NewUintFlag(t)
+		case *cli.Int64Flag:
+			// Int64Flag does not work. See https://github.com/prysmaticlabs/prysm/issues/6478
+			panic(fmt.Sprintf("unsupported flag type type %T", f))
+		default:
+			panic(fmt.Sprintf("cannot convert type %T", f))
+		}
+		wrapped = append(wrapped, f)
+	}
+	return wrapped
+}