Tweak flag processing

To properly retrieve the command.

tools/vcli/bw/common/common.go

@@ -151,8 +151,16 @@ func Run(driverName string, drivers map[string]StoreGenerator, chanSize, bulkTri
 		return 2
 	}
 	var args []string
+	skipFlagValue := false
 	for _, s := range os.Args {
 		if strings.HasPrefix(s, "-") {
+			if !strings.HasPrefix(s, "=") {
+				skipFlagValue = true
+			}
+			continue
+		}
+		if skipFlagValue {
+			skipFlagValue = false
 			continue
 		}
 		args = append(args, s)

tools/vcli/bw/main.go

@@ -32,11 +32,13 @@ import (
 var (
 	// drivers contains the registered drivers available for this command line tool.
 	registeredDrivers map[string]common.StoreGenerator
+
 	// Available flags.
 	driver                = flag.String("driver", "VOLATILE", "The storage driver to use {VOLATILE}.")
 	bqlChannelSize        = flag.Int("bql_channel_size", 0, "Internal channel size to use on BQL queries.")
 	bulkTripleOpSize      = flag.Int("bulk_triple_op_size", 1000, "Number of triples to use in bulk load operations.")
 	bulkTripleBuilderSize = flag.Int("bulk_triple_builder_size_in_bytes", 1000, "Maximum size of literals when parsing a triple.")
+
 	// Add your driver flags below.
 )