void test_index_version__v4_uses_path_compression(void)
{
git_index_entry entry;
git_index *index;
char path[250], buf[1];
struct stat st;
char i, j;
memset(path, 'a', sizeof(path));
memset(buf, 'a', sizeof(buf));
memset(&entry, 0, sizeof(entry));
entry.path = path;
entry.mode = GIT_FILEMODE_BLOB;
g_repo = cl_git_sandbox_init("indexv4");
cl_git_pass(git_repository_index(&index, g_repo));
/* write 676 paths of 250 bytes length */
for (i = 'a'; i <= 'z'; i++) {
for (j = 'a'; j < 'z'; j++) {
path[ARRAY_SIZE(path) - 3] = i;
path[ARRAY_SIZE(path) - 2] = j;
path[ARRAY_SIZE(path) - 1] = '\0';
cl_git_pass(git_index_add_frombuffer(index, &entry, buf, sizeof(buf)));
}
}
cl_git_pass(git_index_write(index));
cl_git_pass(p_stat(git_index_path(index), &st));
/*
* Without path compression, the written paths would at
* least take
*
* (entries * pathlen) = len
* (676 * 250) = 169000
*
* bytes. As index v4 uses suffix-compression and our
* written paths only differ in the last two entries,
* this number will be much smaller, e.g.
*
* (1 * pathlen) + (675 * 2) = len
* 676 + 1350 = 2026
*
* bytes.
*
* Note that the above calculations do not include
* additional metadata of the index, e.g. OIDs or
* index extensions. Including those we get an index
* of approx. 200kB without compression and 40kB with
* compression. As this is a lot smaller than without
* compression, we can verify that path compression is
* used.
*/
cl_assert_(st.st_size < 75000, "path compression not enabled");
git_index_free(index);
}
void tick_index(git_index *index)
{
struct timespec ts;
struct p_timeval times[2];
cl_assert(index->on_disk);
cl_assert(git_index_path(index));
cl_git_pass(git_index_read(index, true));
ts = index->stamp.mtime;
times[0].tv_sec = ts.tv_sec;
times[0].tv_usec = ts.tv_nsec / 1000;
times[1].tv_sec = ts.tv_sec + 5;
times[1].tv_usec = ts.tv_nsec / 1000;
cl_git_pass(p_utimes(git_index_path(index), times));
cl_git_pass(git_index_read(index, true));
}
void test_index_racy__write_index_just_after_file(void)
{
git_index *index;
git_diff *diff;
git_buf path = GIT_BUF_INIT;
struct p_timeval times[2];
/* Make sure we do have a timestamp */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_write(index));
cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
cl_git_mkfile(path.ptr, "A");
/* Force the file's timestamp to be a second after we wrote the index */
times[0].tv_sec = index->stamp.mtime.tv_sec + 1;
times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000;
times[1].tv_sec = index->stamp.mtime.tv_sec + 1;
times[1].tv_usec = index->stamp.mtime.tv_nsec / 1000;
cl_git_pass(p_utimes(path.ptr, times));
/*
* Put 'A' into the index, the size field will be filled,
* because the index' on-disk timestamp does not match the
* file's timestamp.
*/
cl_git_pass(git_index_add_bypath(index, "A"));
cl_git_pass(git_index_write(index));
cl_git_mkfile(path.ptr, "B");
/*
* Pretend this index' modification happened a second after the
* file update, and rewrite the file in that same second.
*/
times[0].tv_sec = index->stamp.mtime.tv_sec + 2;
times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000;
times[1].tv_sec = index->stamp.mtime.tv_sec + 2;
times[0].tv_usec = index->stamp.mtime.tv_nsec / 1000;
cl_git_pass(p_utimes(git_index_path(index), times));
cl_git_pass(p_utimes(path.ptr, times));
cl_git_pass(git_index_read(index, true));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
git_buf_dispose(&path);
git_diff_free(diff);
git_index_free(index);
}
void test_index_read_index__read_and_writes(void)
{
git_oid tree_id, new_tree_id;
git_tree *tree;
git_index *tree_index, *new_index;
cl_git_pass(git_oid_fromstr(&tree_id, "ae90f12eea699729ed24555e40b9fd669da12a12"));
cl_git_pass(git_tree_lookup(&tree, _repo, &tree_id));
cl_git_pass(git_index_new(&tree_index));
cl_git_pass(git_index_read_tree(tree_index, tree));
cl_git_pass(git_index_read_index(_index, tree_index));
cl_git_pass(git_index_write(_index));
cl_git_pass(git_index_open(&new_index, git_index_path(_index)));
cl_git_pass(git_index_write_tree_to(&new_tree_id, new_index, _repo));
cl_assert_equal_oid(&tree_id, &new_tree_id);
git_tree_free(tree);
git_index_free(tree_index);
git_index_free(new_index);
}
void test_repo_env__open(void)
{
git_repository *repo = NULL;
git_buf repo_dir_buf = GIT_BUF_INIT;
const char *repo_dir = NULL;
git_index *index = NULL;
const char *t_obj = "testrepo.git/objects";
const char *p_obj = "peeled.git/objects";
clear_git_env();
cl_fixture_sandbox("attr");
cl_fixture_sandbox("testrepo.git");
cl_fixture_sandbox("peeled.git");
cl_git_pass(p_rename("attr/.gitted", "attr/.git"));
cl_git_pass(git_path_prettify_dir(&repo_dir_buf, "attr", NULL));
repo_dir = git_buf_cstr(&repo_dir_buf);
/* GIT_DIR that doesn't exist */
cl_setenv("GIT_DIR", "does-not-exist");
env_fail(NULL);
/* Explicit start_path overrides GIT_DIR */
env_pass("attr");
env_pass("attr/.git");
env_pass("attr/sub");
env_pass("attr/sub/sub");
/* GIT_DIR with relative paths */
cl_setenv("GIT_DIR", "attr/.git");
env_pass(NULL);
cl_setenv("GIT_DIR", "attr");
env_fail(NULL);
cl_setenv("GIT_DIR", "attr/sub");
env_fail(NULL);
cl_setenv("GIT_DIR", "attr/sub/sub");
env_fail(NULL);
/* GIT_DIR with absolute paths */
cl_setenv_printf("GIT_DIR", "%s/.git", repo_dir);
env_pass(NULL);
cl_setenv("GIT_DIR", repo_dir);
env_fail(NULL);
cl_setenv_printf("GIT_DIR", "%s/sub", repo_dir);
env_fail(NULL);
cl_setenv_printf("GIT_DIR", "%s/sub/sub", repo_dir);
env_fail(NULL);
cl_setenv("GIT_DIR", NULL);
/* Searching from the current directory */
env_cd_pass("attr");
env_cd_pass("attr/.git");
env_cd_pass("attr/sub");
env_cd_pass("attr/sub/sub");
/* A ceiling directory blocks searches from ascending into that
* directory, but doesn't block the start_path itself. */
cl_setenv("GIT_CEILING_DIRECTORIES", repo_dir);
env_cd_pass("attr");
env_cd_fail("attr/sub");
env_cd_fail("attr/sub/sub");
cl_setenv_printf("GIT_CEILING_DIRECTORIES", "%s/sub", repo_dir);
env_cd_pass("attr");
env_cd_pass("attr/sub");
env_cd_fail("attr/sub/sub");
/* Multiple ceiling directories */
cl_setenv_printf("GIT_CEILING_DIRECTORIES", "123%c%s/sub%cabc",
GIT_PATH_LIST_SEPARATOR, repo_dir, GIT_PATH_LIST_SEPARATOR);
env_cd_pass("attr");
env_cd_pass("attr/sub");
env_cd_fail("attr/sub/sub");
cl_setenv_printf("GIT_CEILING_DIRECTORIES", "%s%c%s/sub",
repo_dir, GIT_PATH_LIST_SEPARATOR, repo_dir);
env_cd_pass("attr");
env_cd_fail("attr/sub");
env_cd_fail("attr/sub/sub");
cl_setenv_printf("GIT_CEILING_DIRECTORIES", "%s/sub%c%s",
repo_dir, GIT_PATH_LIST_SEPARATOR, repo_dir);
env_cd_pass("attr");
env_cd_fail("attr/sub");
env_cd_fail("attr/sub/sub");
cl_setenv_printf("GIT_CEILING_DIRECTORIES", "%s%c%s/sub/sub",
repo_dir, GIT_PATH_LIST_SEPARATOR, repo_dir);
env_cd_pass("attr");
env_cd_fail("attr/sub");
env_cd_fail("attr/sub/sub");
cl_setenv("GIT_CEILING_DIRECTORIES", NULL);
/* Index files */
cl_setenv("GIT_INDEX_FILE", cl_fixture("gitgit.index"));
cl_git_pass(git_repository_open_ext(&repo, "attr", GIT_REPOSITORY_OPEN_FROM_ENV, NULL));
cl_git_pass(git_repository_index(&index, repo));
cl_assert_equal_s(git_index_path(index), cl_fixture("gitgit.index"));
cl_assert_equal_i(git_index_entrycount(index), 1437);
git_index_free(index);
git_repository_free(repo);
cl_setenv("GIT_INDEX_FILE", NULL);
/* Namespaces */
cl_setenv("GIT_NAMESPACE", "some-namespace");
cl_git_pass(git_repository_open_ext(&repo, "attr", GIT_REPOSITORY_OPEN_FROM_ENV, NULL));
cl_assert_equal_s(git_repository_get_namespace(repo), "some-namespace");
git_repository_free(repo);
cl_setenv("GIT_NAMESPACE", NULL);
/* Object directories and alternates */
env_check_objects(true, false, false);
cl_setenv("GIT_OBJECT_DIRECTORY", t_obj);
env_check_objects(false, true, false);
cl_setenv("GIT_OBJECT_DIRECTORY", NULL);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", t_obj);
env_check_objects(true, true, false);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", NULL);
cl_setenv("GIT_OBJECT_DIRECTORY", p_obj);
env_check_objects(false, false, true);
cl_setenv("GIT_OBJECT_DIRECTORY", NULL);
cl_setenv("GIT_OBJECT_DIRECTORY", t_obj);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", p_obj);
env_check_objects(false, true, true);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", NULL);
cl_setenv("GIT_OBJECT_DIRECTORY", NULL);
cl_setenv_printf("GIT_ALTERNATE_OBJECT_DIRECTORIES",
"%s%c%s", t_obj, GIT_PATH_LIST_SEPARATOR, p_obj);
env_check_objects(true, true, true);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", NULL);
cl_setenv_printf("GIT_ALTERNATE_OBJECT_DIRECTORIES",
"%s%c%s", p_obj, GIT_PATH_LIST_SEPARATOR, t_obj);
env_check_objects(true, true, true);
cl_setenv("GIT_ALTERNATE_OBJECT_DIRECTORIES", NULL);
cl_fixture_cleanup("peeled.git");
cl_fixture_cleanup("testrepo.git");
cl_fixture_cleanup("attr");
git_buf_free(&repo_dir_buf);
clear_git_env();
}
