Move git diff codes from models to services/gitdiff (#7889)

* move git diff codes from models to services/gitdiff

* fix template

* fix test

* fix template

3 files changed, 10 insertions, 7 deletions

diff --git a/modules/repofiles/diff.go b/modules/repofiles/diff.go
index 3b5de5fa6f..c98bbc7684 100644
--- a/modules/repofiles/diff.go
+++ b/modules/repofiles/diff.go
@@ -8,10 +8,11 @@ import (
 	"strings"
 
 	"code.gitea.io/gitea/models"
+	"code.gitea.io/gitea/services/gitdiff"
 )
 
 // GetDiffPreview produces and returns diff result of a file which is not yet committed.
-func GetDiffPreview(repo *models.Repository, branch, treePath, content string) (*models.Diff, error) {
+func GetDiffPreview(repo *models.Repository, branch, treePath, content string) (*gitdiff.Diff, error) {
 	if branch == "" {
 		branch = repo.DefaultBranch
 	}
diff --git a/modules/repofiles/diff_test.go b/modules/repofiles/diff_test.go
index bc7d4ebad6..de5ed1d754 100644
--- a/modules/repofiles/diff_test.go
+++ b/modules/repofiles/diff_test.go
@@ -9,6 +9,7 @@ import (
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/test"
+	"code.gitea.io/gitea/services/gitdiff"
 
 	"github.com/stretchr/testify/assert"
 )
@@ -25,10 +26,10 @@ func TestGetDiffPreview(t *testing.T) {
 	treePath := "README.md"
 	content := "# repo1\n\nDescription for repo1\nthis is a new line"
 
-	expectedDiff := &models.Diff{
+	expectedDiff := &gitdiff.Diff{
 		TotalAddition: 2,
 		TotalDeletion: 1,
-		Files: []*models.DiffFile{
+		Files: []*gitdiff.DiffFile{
 			{
 				Name:        "README.md",
 				OldName:     "README.md",
@@ -42,10 +43,10 @@ func TestGetDiffPreview(t *testing.T) {
 				IsLFSFile:   false,
 				IsRenamed:   false,
 				IsSubmodule: false,
-				Sections: []*models.DiffSection{
+				Sections: []*gitdiff.DiffSection{
 					{
 						Name: "",
-						Lines: []*models.DiffLine{
+						Lines: []*gitdiff.DiffLine{
 							{
 								LeftIdx:  0,
 								RightIdx: 0,
diff --git a/modules/repofiles/temp_repo.go b/modules/repofiles/temp_repo.go
index d640ba80b0..f791c3cb96 100644
--- a/modules/repofiles/temp_repo.go
+++ b/modules/repofiles/temp_repo.go
@@ -20,6 +20,7 @@ import (
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/process"
 	"code.gitea.io/gitea/modules/setting"
+	"code.gitea.io/gitea/services/gitdiff"
 )
 
 // TemporaryUploadRepository is a type to wrap our upload repositories as a shallow clone
@@ -290,7 +291,7 @@ func (t *TemporaryUploadRepository) Push(doer *models.User, commitHash string, b
 }
 
 // DiffIndex returns a Diff of the current index to the head
-func (t *TemporaryUploadRepository) DiffIndex() (diff *models.Diff, err error) {
+func (t *TemporaryUploadRepository) DiffIndex() (diff *gitdiff.Diff, err error) {
 	timeout := 5 * time.Minute
 	ctx, cancel := context.WithTimeout(context.Background(), timeout)
 	defer cancel()
@@ -313,7 +314,7 @@ func (t *TemporaryUploadRepository) DiffIndex() (diff *models.Diff, err error) {
 	pid := process.GetManager().Add(fmt.Sprintf("diffIndex [repo_path: %s]", t.repo.RepoPath()), cmd)
 	defer process.GetManager().Remove(pid)
 
-	diff, err = models.ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, stdout)
+	diff, err = gitdiff.ParsePatch(setting.Git.MaxGitDiffLines, setting.Git.MaxGitDiffLineCharacters, setting.Git.MaxGitDiffFiles, stdout)
 	if err != nil {
 		return nil, fmt.Errorf("ParsePatch: %v", err)
 	}