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Handle tarballs where directory entries are not contiguous

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I.e. when not all entries underneath a directory X follow eachother,
but there is some entry Y that isn't a child of X in between.

Fixes #11656.
This commit is contained in:
Eelco Dolstra 2024-10-14 13:53:54 +02:00
parent ab0f9f9089
commit 4012954b59
1 changed files with 17 additions and 1 deletions
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18
src/libfetchers/git-utils.cc
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@ -977,8 +977,24 @@ struct GitFileSystemObjectSinkImpl : GitFileSystemObjectSink
void pushBuilder(std::string name)
{
const git_tree_entry * entry;
Tree prevTree = nullptr;
if (!pendingDirs.empty() &&
(entry = git_treebuilder_get(pendingDirs.back().builder.get(), name.c_str())))
{
/* Clone a tree that we've already finished. This happens
if a tarball has directory entries that are not
contiguous. */
if (git_tree_entry_type(entry) != GIT_OBJECT_TREE)
throw Error("parent of '%s' is not a directory", name);
if (git_tree_entry_to_object((git_object * *) (git_tree * *) Setter(prevTree), *repo, entry))
throw Error("looking up parent of '%s': %s", name, git_error_last()->message);
}
git_treebuilder * b;
if (git_treebuilder_new(&b, *repo, nullptr))
if (git_treebuilder_new(&b, *repo, prevTree.get()))
throw Error("creating a tree builder: %s", git_error_last()->message);
pendingDirs.push_back({ .name = std::move(name), .builder = TreeBuilder(b) });
};