Added configuration flags

fileio/file_rw.go

@@ -29,7 +29,7 @@ func WriteToFile(filename string, content string) {
 // InitOutputDirectory - Creates output directory
 func InitOutputDirectory(path string) {
 	if _, err := os.Stat(path); os.IsNotExist(err) {
-		os.Mkdir(path, os.ModePerm)
+		os.MkdirAll(path, os.ModePerm)
 	}
 }
 

main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"encoding/json"
 	"fmt"
-	"os"
 	"path/filepath"
 
 	. "./fileio"
@@ -13,17 +12,13 @@ import (
 )
 
 func main() {
-	args := os.Args[1:]
+	GetConfig()
-	if len(args) < 1 {
-		fmt.Println("Usage: rss-dl [FEED_URL]")
-		return
-	}
 
 	fp := gofeed.NewParser()
-	LogInfo("Downloading " + args[0])
+	LogInfo("Downloading " + Config.FeedURL)
-	feed, _ := fp.ParseURL(args[0])
+	feed, _ := fp.ParseURL(Config.FeedURL)
 
-	outputDir := ToCleanString(feed.Title)
+	outputDir := Config.OutputPath + "/" + ToCleanString(feed.Title)
 	InitOutputDirectory(outputDir)
 
 	feedInfoPath := outputDir + "/feed_details.json"

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
+}