Added configuration flags

structs/config.go

@@ -0,0 +1,29 @@
+package structs
+
+import (
+	"flag"
+	"fmt"
+	"os"
+)
+
+// Config - Runtime configuration
+var Config struct {
+	FeedURL    string
+	OutputPath string
+}
+
+// GetConfig - Returns Config object
+func GetConfig() {
+	outputPath := flag.String("output", ".", "Output path")
+
+	flag.Parse()
+
+	args := flag.Args()
+	if len(args) < 1 {
+		fmt.Println("Usage: rss-dl [OPTIONS] FEED_URL")
+		os.Exit(2)
+	}
+
+	Config.FeedURL = flag.Args()[len(args)-1]
+	Config.OutputPath = *outputPath
+}