初始提交: Gitea 项目代码

modules/gitrepo/fetch.go

@@ -0,0 +1,28 @@
+// Copyright 2025 The Gitea Authors. All rights reserved.
+// SPDX-License-Identifier: MIT
+
+package gitrepo
+
+import (
+	"context"
+
+	"gitea.dev/modules/git/gitcmd"
+	"gitea.dev/modules/globallock"
+)
+
+// FetchRemoteCommit fetches a specific commit and its related objects from a remote
+// repository into the managed repository.
+//
+// If no reference (branch, tag, or other ref) points to the fetched commit, it will
+// be treated as unreachable and cleaned up by `git gc` after the default prune
+// expiration period (2 weeks). Ref: https://www.kernel.org/pub/software/scm/git/docs/git-gc.html
+//
+// This behavior is sufficient for temporary operations, such as determining the
+// merge base between commits.
+func FetchRemoteCommit(ctx context.Context, repo, remoteRepo Repository, commitID string) error {
+	return globallock.LockAndDo(ctx, getRepoWriteLockKey(repo.RelativePath()), func(ctx context.Context) error {
+		return RunCmd(ctx, repo, gitcmd.NewCommand("fetch", "--no-tags").
+			AddDynamicArguments(repoPath(remoteRepo)).
+			AddDynamicArguments(commitID))
+	})
+}