fix test & lint

Author: wxiaoguang

services/gitdiff/gitdiff.go

@@ -533,13 +533,13 @@ parsingLoop:
 		}
 
 		if maxFiles > -1 && len(diff.Files) >= maxFiles {
-			lastFile := createDiffFile(diff, line)
+			lastFile := createDiffFile(line)
 			diff.End = lastFile.Name
 			diff.IsIncomplete = true
 			break parsingLoop
 		}
 
-		curFile = createDiffFile(diff, line)
+		curFile = createDiffFile(line)
 		if skipping {
 			if curFile.Name != skipToFile {
 				line, err = skipToNextDiffHead(input)
@@ -1013,7 +1013,7 @@ func parseHunks(ctx context.Context, curFile *DiffFile, maxLines, maxLineCharact
 	}
 }
 
-func createDiffFile(diff *Diff, line string) *DiffFile {
+func createDiffFile(line string) *DiffFile {
 	// The a/ and b/ filenames are the same unless rename/copy is involved.
 	// Especially, even for a creation or a deletion, /dev/null is not used
 	// in place of the a/ or b/ filenames.

services/repository/files/diff_test.go

@@ -35,7 +35,6 @@ func TestGetDiffPreview(t *testing.T) {
 				Name:        "README.md",
 				OldName:     "README.md",
 				NameHash:    "8ec9a00bfd09b3190ac6b22251dbb1aa95a0579d",
-				Index:       1,
 				Addition:    2,
 				Deletion:    1,
 				Type:        2,