init conf

unnamed-project.go

@@ -1,9 +1,76 @@
 package main
 
 import (
+	"flag"
 	"fmt"
+	"log"
+	"os"
+	"os/user"
+	"path/filepath"
 )
 
+const help = `unnamed-project: WIP
+
+Options:
+	-n    node identifier (default: your system username)
+	-p    path to share files (default: current working directory)
+	-w    port for web server (default: 1312)
+	-s    port for file server (default: 5555)
+	-d    debug logging
+	-h    output help
+`
+
+var nodeIDFlag string
+var pathFlag string
+var webPortFlag int
+var filePortFlag int
+var debugFlag bool
+var helpFlag bool
+
 func main() {
-	fmt.Println("Hello, World!")
+	systemUser, err := user.Current()
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	cwdAbsPath, err := filepath.Abs(".")
+	if err != nil {
+		log.Fatalln(err)
+	}
+
+	handleCliFlags(systemUser.Name, cwdAbsPath)
+
+	if helpFlag {
+		fmt.Printf(help)
+		os.Exit(0)
+	}
+
+	conf := &config{
+		nodeID:    nodeIDFlag,
+		webPort:   webPortFlag,
+		filePort:  filePortFlag,
+		sharePath: pathFlag,
+		debug:     debugFlag,
+	}
+
+	fmt.Println(conf)
+
+}
+
+func handleCliFlags(username, sharePath string) {
+	flag.StringVar(&nodeIDFlag, "n", username, "node identifier")
+	flag.StringVar(&pathFlag, "p", sharePath, "path to share files")
+	flag.IntVar(&webPortFlag, "w", 1312, "port for web server")
+	flag.IntVar(&filePortFlag, "s", 5555, "port for file server")
+	flag.BoolVar(&debugFlag, "d", false, "debug logging")
+	flag.BoolVar(&helpFlag, "h", false, "output help")
+	flag.Parse()
+}
+
+type config struct {
+	nodeID    string
+	webPort   int
+	filePort  int
+	sharePath string
+	debug     bool
 }