Extend specs for metadata, improve internal loop

internal/zipartifacts/metadata.go

@@ -79,9 +79,11 @@ func generateZipMetadata(output io.Writer, archive *zip.Reader) error {
 
 		for d := path.Dir(entry.Name); d != "." && d != "/"; d = path.Dir(d) {
 			entryDir := d + "/"
-			if _, ok := zipMap[entryDir]; !ok {
-				zipMap[entryDir] = nil
+			// If entryDir is already in the zipMap then so are all its parent directories
+			if _, ok := zipMap[entryDir]; ok {
+				break
 			}
+			zipMap[entryDir] = nil
 		}
 	}
 

internal/zipartifacts/metadata_test.go

@@ -13,28 +13,29 @@ func TestMissingMetadataEntries(t *testing.T) {
 
 	archive := zip.NewWriter(&zipBuffer)
 
-	firstFile, err := archive.Create("file1")
-	if err != nil {
-		t.Fatal(err)
-	}
-	fmt.Fprint(firstFile, "test12")
+	files := []string{"file1", "some/file/dir/file2", "../../test12/test",
+		"/usr/bin/test", `c:\windows\win32.exe`, `c:/windows/win.dll`, "./f/asd", "/"}
 
-	secondFile, err := archive.Create("some/file/dir/file2")
+	for _, file := range files {
+		archiveFile, err := archive.Create(file)
 		if err != nil {
 			t.Fatal(err)
 		}
-	fmt.Fprint(secondFile, "test125678")
+		fmt.Fprint(archiveFile, file)
+	}
 
 	archive.Close()
 
 	zipReader := bytes.NewReader(zipBuffer.Bytes())
 	zipArchiveReader, _ := zip.NewReader(zipReader, int64(binary.Size(zipBuffer.Bytes())))
-	err = generateZipMetadata(&metaBuffer, zipArchiveReader)
+	if err := generateZipMetadata(&metaBuffer, zipArchiveReader); err != nil {
+		t.Fatal("zipartifacts: generateZipMetadata failed", err)
+	}
 
 	paths := []string{"file1", "some/", "some/file/", "some/file/dir", "some/file/dir/file2"}
 	for _, path := range paths {
 		if !bytes.Contains(metaBuffer.Bytes(), []byte(path)) {
-			t.Fatalf("zipartifacts: metadata for path %s not found!", path)
+			t.Fatal("zipartifacts: metadata for path", path, "not found")
 		}
 	}
 }