feat: better flags

cmd/invoicer/cmd.go

@@ -11,29 +11,34 @@ import (
 type cmd struct {
 	cmd    func([]string, any)
 	config any
+	fs     *flag.FlagSet
 }
 
-func (c *cmd) Run() {
+func (c *cmd) Register(name string) {
+	c.fs = flag.NewFlagSet(name, flag.ExitOnError)
 	if c.config != nil {
-		flag.Parse()
 		filler := flagsfiller.New()
-		err := filler.Fill(flag.CommandLine, c.config)
+		err := filler.Fill(c.fs, c.config)
 		if err != nil {
 			log.Fatal(err)
 		}
-		c.cmd(flag.Args()[1:], c.config)
-	} else {
-		c.cmd(os.Args[2:], c.config)
 	}
 }
 
-var commands = map[string]cmd{
+func (c *cmd) Run(name string) {
+	c.fs.Parse(os.Args[2:])
+	c.cmd(c.fs.Args(), c.config)
+}
+
+var commands = map[string]*cmd{
 	"request": {
 		request,
 		nil,
+		nil,
 	},
 	"create": {
 		create,
 		&createFlags{},
+		nil,
 	},
 }