feat: reastructure and create commands

cmd/invoicer/main.go

@@ -0,0 +1,37 @@
+package main
+
+import (
+	"flag"
+	"log"
+	"os"
+
+	"github.com/itzg/go-flagsfiller"
+)
+
+func main() {
+	if len(os.Args) < 2 {
+		return
+	}
+
+	var cmd *cmd
+
+	for n, c := range commands {
+		if os.Args[1] == n {
+			cmd = &c
+			break
+		}
+	}
+	if cmd == nil {
+		return
+	}
+
+	if cmd.config != nil {
+		filler := flagsfiller.New()
+		err := filler.Fill(flag.CommandLine, cmd.config)
+		if err != nil {
+			log.Fatal(err)
+		}
+	}
+
+	cmd.Run()
+}