Simplify HTTP not modified replies

cmd/fdroidcl/http.go

@@ -4,16 +4,13 @@
 package main
 
 import (
-	"errors"
+	"fmt"
 	"io"
 	"io/ioutil"
-	"log"
 	"net/http"
 	"os"
 )
 
-var errNotModified = errors.New("etag matches, file was not modified")
-
 func respEtag(resp *http.Response) string {
 	etags, e := resp.Header["Etag"]
 	if !e || len(etags) == 0 {
@@ -23,7 +20,7 @@ func respEtag(resp *http.Response) string {
 }
 
 func downloadEtag(url, path string) error {
-	log.Printf("Downloading %s", url)
+	fmt.Printf("Downloading %s...", url)
 	client := &http.Client{}
 	req, err := http.NewRequest("GET", url, nil)
 
@@ -39,7 +36,8 @@ func downloadEtag(url, path string) error {
 	}
 	defer resp.Body.Close()
 	if resp.StatusCode == http.StatusNotModified {
-		return errNotModified
+		fmt.Println(" not modified")
+		return nil
 	}
 	f, err := os.OpenFile(path, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0644)
 	if err != nil {
@@ -53,5 +51,6 @@ func downloadEtag(url, path string) error {
 	if err2 != nil {
 		return err2
 	}
+	fmt.Println(" done")
 	return nil
 }

cmd/fdroidcl/main.go

@@ -179,9 +179,8 @@ func indexPath(name string) string {
 }
 
 func updateIndex() error {
-	p := indexPath(repoName)
 	url := fmt.Sprintf("%s/%s", repoURL, "index.jar")
-	if err := downloadEtag(url, p); err != nil {
+	if err := downloadEtag(url, indexPath(repoName)); err != nil {
 		return err
 	}
 	return nil
@@ -252,10 +251,7 @@ func main() {
 
 	switch cmd {
 	case "update":
-		err := updateIndex()
-		if err == errNotModified {
-			log.Print("Index up to date")
-		} else if err != nil {
+		if err := updateIndex(); err != nil {
 			log.Fatalf("Could not update index: %v", err)
 		}
 	case "list":