preserve url encoded path in helm repo

Signed-off-by: Somtochi Onyekwere <somtochionyekwere@gmail.com>

internal/helm/repository/utils.go

@@ -47,10 +47,16 @@ func NormalizeURL(repositoryURL string) (string, error) {
 
 	if u.Scheme == helmreg.OCIScheme {
 		u.Path = strings.TrimRight(u.Path, "/")
+		// we perform the same operation on u.RawPath so that it will be a valid encoding
+		// of u.Path. This allows u.EscapedPath() (which is used in computing u.String()) to return
+		// the correct value when the path is url encoded.
+		// ref: https://pkg.go.dev/net/url#URL.EscapedPath
+		u.RawPath = strings.TrimRight(u.RawPath, "/")
 		return u.String(), nil
 	}
 
 	u.Path = strings.TrimRight(u.Path, "/") + "/"
+	u.RawPath = strings.TrimRight(u.RawPath, "/") + "/"
 	return u.String(), nil
 }
 

internal/helm/repository/utils_test.go

@@ -64,6 +64,16 @@ func TestNormalizeURL(t *testing.T) {
 			url:  "http://example.com/?st=pr",
 			want: "http://example.com/?st=pr",
 		},
+		{
+			name: "url with encoded path",
+			url:  "http://example.com/next%2Fpath",
+			want: "http://example.com/next%2Fpath/",
+		},
+		{
+			name: "url with encoded path and slash",
+			url:  "http://example.com/next%2Fpath/",
+			want: "http://example.com/next%2Fpath/",
+		},
 		{
 			name: "empty url",
 			url:  "",