cmd/ipfs: Display help text when help flag is set

cmd/ipfs/ipfs.go

@@ -50,6 +50,11 @@ func main() {
 		os.Exit(1)
 	}
 
+	if help, found := options.Option("help"); found && help.(bool) {
+		fmt.Println(cmd.Help)
+		os.Exit(0)
+	}
+
 	if debug, found := options.Option("debug"); found && debug.(bool) {
 		u.Debug = true
 

core/commands/root.go

@@ -15,6 +15,7 @@ var Root = &cmds.Command{
 	Options: []cmds.Option{
 		cmds.Option{[]string{"config", "c"}, cmds.String},
 		cmds.Option{[]string{"debug", "D"}, cmds.Bool},
+		cmds.Option{[]string{"help", "h"}, cmds.Bool},
 	},
 	Help: `ipfs - global versioned p2p merkledag file system