Added long descriptions for mtool.

cmd/test/main.go

@@ -15,15 +15,14 @@ var (
 				args := flags.Parse()
 				fmt.Println(args)
 			}).Desc(
-				"print string to standard output string",
+				"print string array to standard output",
 			).Usage(
 				"[str1 str2 ... strN]",
 			),
 		mtool.T("sum").Func(func(flags *mtool.Flags) {
-				flags.Parse()
-				args := flags.Args()
-				one, _ := strconv.Atoi(args[1])
-				two, _ := strconv.Atoi(args[2])
+				args := flags.Parse()
+				one, _ := strconv.Atoi(args[0])
+				two, _ := strconv.Atoi(args[1])
 				fmt.Println(one + two)
 			}).Desc(
 				"add one value to another",
@@ -34,18 +33,21 @@ var (
 			mtool.T("first").Func(func(flags *mtool.Flags) {
 					fmt.Println("called the first", flags.Parse())
 				}).Desc(
-					"description",
-				).Usage(
-					"[nothing here]",
+					"first sub tool",
 				),
 			mtool.T("second").Func(func(flags *mtool.Flags){
 					fmt.Println("called the second", flags.Parse())
 				}).Desc(
-					"description",
-				).Usage(
-					"[nothing here]",
+					"second sub tool",
 				),
+		).Desc(
+			"the tool to demonstrate how subtools work",
 		),
+	).Desc(
+		"the testing program to show how to use the lib",
+	).Ldesc(
+		"this is the long description where you "+
+			"can put anything you want about the program",
 	)
 )
 

mtool/main.go

@@ -31,7 +31,7 @@ func (fn HandlerFunc) Handle(flags *Flags) {
 type Tool struct {
 	name string
 	handler Handler
-	desc, usage string
+	desc, ldesc, usage string
 	subs ToolMap
 	parent *Tool
 }
@@ -58,6 +58,11 @@ func (t *Tool) Desc(d string) *Tool {
 	return t
 }
 
+func (t *Tool) Ldesc(d string) *Tool {
+	t.ldesc = d
+	return t
+}
+
 func (t *Tool) Usage(u string) *Tool {
 	t.usage = u
 	return t
@@ -92,6 +97,10 @@ func (t *Tool) FullName() string {
 	return ret
 }
 
+func (t *Tool) IsRoot() bool {
+	return t.parent == nil
+}
+
 func (t *Tool) ProgName() string {
 	for t.parent != nil {
 		t = t.parent
@@ -114,15 +123,21 @@ func (t *Tool) Run(args []string) {
 	out := flags.Output()
 	flags.Usage = func() {
 		n := 0
-		// We can visit the flags since the
-		// function will be called after 
-		// parsing.
 		flags.VisitAll(func(f *flag.Flag){
 			n++
 		})
-		
 		hasOptions := n != 0
 
+		// Name
+		if usageTool.desc != "" {
+			fmt.Fprintf(
+				out, "Name:\n  %s - %s\n\n",
+				usageTool.FullName(), t.desc,
+			)
+		}
+		
+
+		// Usage
 		fmt.Fprintf(
 			out, "Usage:\n  %s",
 			usageTool.FullName(),
@@ -141,12 +156,16 @@ func (t *Tool) Run(args []string) {
 
 		fmt.Fprintln(out, "")
 
+		if usageTool.ldesc != "" {
+			fmt.Fprintf(out, "Description:\n  %s", usageTool.ldesc)
+		}
+		
+		// Options
 		if hasOptions {
 			fmt.Fprintln(out, "\nOptions:")
 			flags.PrintDefaults()
 		}
 		
-		os.Exit(1)
 	}
 	
 	flags.args = args
@@ -169,14 +188,26 @@ func (t *Tool) Run(args []string) {
 		}
 		sort.Strings(keys)
 
+		if t.desc != "" {
+			fmt.Fprintf(
+				out, "Name:\n  %s - %s\n\n",
+				t.FullName(), t.desc,
+			)
+		}
+
 		fmt.Fprintf(out, "Usage:\n"+
-			"  %s <command> [options] [arguments]\n\n" +
-			"Commands:\n", t.FullName())
-		for i, k := range keys {
+			"  %s <command>\n", t.FullName())
+
+		if t.ldesc != "" {
+			fmt.Fprintf(out, "\nDescription:\n  %s\n", t.ldesc)
+		}
+
+		if len(keys) > 0 {
+			fmt.Fprint(out, "\nCommands:\n")
+			for _, k := range keys {
+
 				tool := t.subs[k]
 				fmt.Fprintf(out, "  %s\t%s\n", k, tool.desc)
-			if i != len(keys) - 1 {
-				fmt.Fprintln(out, "")
 			}
 		}