Fix issues reported by semgrep

internal/backend/azure/azure_test.go

@@ -141,9 +141,7 @@ func TestUploadLargeFile(t *testing.T) {
 
 	azcfg, err := azure.ParseConfig(os.Getenv("RESTIC_TEST_AZURE_REPOSITORY"))
 	if err != nil {
-		if err != nil {
-			t.Fatal(err)
-		}
+		t.Fatal(err)
 	}
 
 	cfg := azcfg.(azure.Config)
@@ -158,9 +156,7 @@ func TestUploadLargeFile(t *testing.T) {
 
 	be, err := azure.Create(cfg, tr)
 	if err != nil {
-		if err != nil {
-			t.Fatal(err)
-		}
+		t.Fatal(err)
 	}
 
 	defer func() {

internal/migrations/s3_layout.go

@@ -42,7 +42,7 @@ func retry(max int, fail func(err error), f func() error) error {
 	for i := 0; i < max; i++ {
 		err = f()
 		if err == nil {
-			return err
+			return nil
 		}
 		if fail != nil {
 			fail(err)

internal/repository/repository.go

@@ -517,12 +517,7 @@ func (r *Repository) LoadIndex(ctx context.Context) error {
 	}
 
 	// remove index files from the cache which have been removed in the repo
-	err = r.PrepareCache(validIndex)
-	if err != nil {
-		return err
-	}
-
-	return nil
+	return r.PrepareCache(validIndex)
 }
 
 const listPackParallelism = 10

internal/restorer/restorer.go

@@ -351,12 +351,7 @@ func (res *Restorer) VerifyFiles(ctx context.Context, dst string) (int, error) {
 				offset += int64(length)
 			}
 
-			err = file.Close()
-			if err != nil {
-				return err
-			}
-
-			return nil
+			return file.Close()
 		},
 		leaveDir: func(node *restic.Node, target, location string) error { return nil },
 	})

internal/restorer/restorer_test.go

@@ -141,12 +141,6 @@ func saveSnapshot(t testing.TB, repo restic.Repository, snapshot Snapshot) (*res
 	return sn, id
 }
 
-// toSlash converts the OS specific path dir to a slash-separated path.
-func toSlash(dir string) string {
-	data := strings.Split(dir, string(filepath.Separator))
-	return strings.Join(data, "/")
-}
-
 func TestRestorer(t *testing.T) {
 	var tests = []struct {
 		Snapshot
@@ -354,7 +348,7 @@ func TestRestorer(t *testing.T) {
 
 			errors := make(map[string]map[string]struct{})
 			res.Error = func(location string, err error) error {
-				location = toSlash(location)
+				location = filepath.ToSlash(location)
 				t.Logf("restore returned error for %q: %v", location, err)
 				if errors[location] == nil {
 					errors[location] = make(map[string]struct{})