Combine bool short names

Adds the ability to allow the combination of bool
short-name options.  For example,

cmd foobar -ov

This is done through a bool "UseShortOptionHandler" set in
the command struct.

Built upon PR #621

Signed-off-by: baude <bbaude@redhat.com>

command.go

@@ -55,6 +55,10 @@ type Command struct {
 	HideHelp bool
 	// Boolean to hide this command from help or completion
 	Hidden bool
+	// Boolean to enable short-option handling so user can combine several
+	// single-character bool arguements into one
+	// i.e. foobar -o -v -> foobar -ov
+	UseShortOptionHandling bool
 
 	// Full name of command for help, defaults to full command name, including parent commands.
 	HelpName        string
@@ -141,20 +145,22 @@ func (c Command) Run(ctx *Context) (err error) {
 			} else {
 				flagArgs = args[firstFlagIndex:]
 			}
-
 			// separate combined flags
-			var flagArgsSeparated []string
-			for _, flagArg := range flagArgs {
-				if strings.HasPrefix(flagArg, "-") && strings.HasPrefix(flagArg, "--") == false && len(flagArg) >2 {
-					for _, flagChar := range flagArg[1:] {
-						flagArgsSeparated = append(flagArgsSeparated, "-" + string(flagChar))
+			if c.UseShortOptionHandling {
+				var flagArgsSeparated []string
+				for _, flagArg := range flagArgs {
+					if strings.HasPrefix(flagArg, "-") && strings.HasPrefix(flagArg, "--") == false && len(flagArg) > 2 {
+						for _, flagChar := range flagArg[1:] {
+							flagArgsSeparated = append(flagArgsSeparated, "-"+string(flagChar))
+						}
+					} else {
+						flagArgsSeparated = append(flagArgsSeparated, flagArg)
 					}
-				} else {
-					flagArgsSeparated = append(flagArgsSeparated, flagArg)
 				}
+				err = set.Parse(append(flagArgsSeparated, regularArgs...))
+			} else {
+				err = set.Parse(append(flagArgs, regularArgs...))
 			}
-
-			err = set.Parse(append(flagArgsSeparated, regularArgs...))
 		} else {
 			err = set.Parse(ctx.Args().Tail())
 		}