multipack: Introduce a parser for multi-pack-index files

This change is the first in a series to add support for git's
multi-pack-index. This should speed up large repositories significantly.

Part of: #5399

1 files changed, 29 insertions, 0 deletions

diff --git a/tests/pack/midx.c b/tests/pack/midx.c
new file mode 100644
index 000000000..1f47d9502
--- /dev/null
+++ b/tests/pack/midx.c
@@ -0,0 +1,29 @@
+#include "clar_libgit2.h"
+
+#include <git2.h>
+
+#include "midx.h"
+
+void test_pack_midx__parse(void)
+{
+	git_repository *repo;
+	struct git_midx_file *idx;
+	struct git_midx_entry e;
+	git_oid id;
+	git_buf midx_path = GIT_BUF_INIT;
+
+	cl_git_pass(git_repository_open(&repo, cl_fixture("testrepo.git")));
+	cl_git_pass(git_buf_joinpath(&midx_path, git_repository_path(repo), "objects/pack/multi-pack-index"));
+	cl_git_pass(git_midx_open(&idx, git_buf_cstr(&midx_path)));
+
+	cl_git_pass(git_oid_fromstr(&id, "5001298e0c09ad9c34e4249bc5801c75e9754fa5"));
+	cl_git_pass(git_midx_entry_find(&e, idx, &id, GIT_OID_HEXSZ));
+	cl_assert_equal_oid(&e.sha1, &id);
+	cl_assert_equal_s(
+			(const char *)git_vector_get(&idx->packfile_names, e.pack_index),
+			"pack-d7c6adf9f61318f041845b01440d09aa7a91e1b5.idx");
+
+	git_midx_free(idx);
+	git_repository_free(repo);
+	git_buf_dispose(&midx_path);
+}