Merge pull request #14812 from Mic92/backport-14799-to-2.33-maintenance

libfetchers: Bump tarball-cache version to v2 [backport 2.33]

src/libfetchers/git-utils.cc

@@ -1427,7 +1427,11 @@ namespace fetchers {
 
 ref<GitRepo> Settings::getTarballCache() const
 {
-    static auto repoDir = std::filesystem::path(getCacheDir()) / "tarball-cache";
+    /* v1: Had either only loose objects or thin packfiles referring to loose objects
+     * v2: Must have only packfiles with no loose objects. Should get repacked periodically
+     * for optimal packfiles.
+     */
+    static auto repoDir = std::filesystem::path(getCacheDir()) / "tarball-cache-v2";
     return GitRepo::openRepo(repoDir, /*create=*/true, /*bare=*/true, /*packfilesOnly=*/true);
 }