From e68b9d00a6e05b3a941f63ffb696f91e554ac5ec Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel@debian.org>
Date: Fri, 18 Oct 2024 20:33:49 +0200
Subject: Adding upstream version 9.0.3.

Signed-off-by: Daniel Baumann <daniel@debian.org>
---
 services/repository/files/diff.go | 42 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 services/repository/files/diff.go

(limited to 'services/repository/files/diff.go')

diff --git a/services/repository/files/diff.go b/services/repository/files/diff.go
new file mode 100644
index 0000000..bf8b938
--- /dev/null
+++ b/services/repository/files/diff.go
@@ -0,0 +1,42 @@
+// Copyright 2019 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package files
+
+import (
+	"context"
+	"strings"
+
+	repo_model "code.gitea.io/gitea/models/repo"
+	"code.gitea.io/gitea/services/gitdiff"
+)
+
+// GetDiffPreview produces and returns diff result of a file which is not yet committed.
+func GetDiffPreview(ctx context.Context, repo *repo_model.Repository, branch, treePath, content string) (*gitdiff.Diff, error) {
+	if branch == "" {
+		branch = repo.DefaultBranch
+	}
+	t, err := NewTemporaryUploadRepository(ctx, repo)
+	if err != nil {
+		return nil, err
+	}
+	defer t.Close()
+	if err := t.Clone(branch, true); err != nil {
+		return nil, err
+	}
+	if err := t.SetDefaultIndex(); err != nil {
+		return nil, err
+	}
+
+	// Add the object to the database
+	objectHash, err := t.HashObject(strings.NewReader(content))
+	if err != nil {
+		return nil, err
+	}
+
+	// Add the object to the index
+	if err := t.AddObjectToIndex("100644", objectHash, treePath); err != nil {
+		return nil, err
+	}
+	return t.DiffIndex()
+}
-- 
cgit v1.2.3