Support for global flags in help text

cli.go

@@ -1,6 +1,7 @@
 package cli
 
 import "os"
+import "flag"
 
 // The name of the program. Defaults to os.Args[0]
 var Name = os.Args[0]
@@ -12,8 +13,11 @@ var Usage = "<No Description>"
 var Version = "0.0.0"
 
 // List of commands to execute
-var Commands []Command = nil
+var Commands []Command
 
+var Flags []Flag
+
+// The action to execute when no subcommands are specified
 var DefaultAction = ShowHelp
 
 func Run(args []string) {
@@ -37,6 +41,7 @@ type Command struct {
 	Usage       string
 	Description string
 	Action      Action
+  Flags       flag.FlagSet
 }
 
 type Action func(name string)

flag.go

@@ -0,0 +1,27 @@
+package cli
+
+import "fmt"
+
+type Flag interface {
+  fmt.Stringer
+}
+
+type BoolFlag struct {
+  Name string
+  Value bool
+  Usage string
+}
+
+type StringFlag struct {
+  Name string
+  Value string
+  Usage string
+}
+
+func (f StringFlag) String() string {
+  return fmt.Sprintf("--%v 'string'\t%v", f.Name, f.Usage)
+}
+
+func (f BoolFlag) String() string {
+  return fmt.Sprintf("--%v\t%v", f.Name, f.Usage)
+}

help.go

@@ -7,8 +7,9 @@ import "text/template"
 type HelpData struct {
 	Name     string
 	Usage    string
-	Commands []Command
 	Version  string
+	Commands []Command
+	Flags    []Flag
 }
 
 var HelpCommand = Command{
@@ -34,12 +35,16 @@ VERSION:
 COMMANDS:
     {{range .Commands}}{{.Name}}{{with .ShortName}}, {{.}}{{end}}{{ "\t" }}{{.Usage}}
     {{end}}
+GLOBAL OPTIONS
+    {{range .Flags}}{{.}}
+    {{end}}
 `
 	data := HelpData{
 		Name,
 		Usage,
-		append(Commands, HelpCommand),
 		Version,
+		append(Commands, HelpCommand),
+    Flags,
 	}
 
 	w := tabwriter.NewWriter(os.Stdout, 0, 8, 1, '\t', 0)