#include "clar_libgit2.h"
#include "../checkout/checkout_helpers.h"
#include "buffer.h"
#include "index.h"
#include "repository.h"
static git_repository *g_repo;
void test_index_racy__initialize(void)
{
cl_git_pass(git_repository_init(&g_repo, "diff_racy", false));
}
void test_index_racy__cleanup(void)
{
git_repository_free(g_repo);
g_repo = NULL;
cl_fixture_cleanup("diff_racy");
}
void test_index_racy__diff(void)
{
git_index *index;
git_diff *diff;
git_buf path = GIT_BUF_INIT;
cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
cl_git_mkfile(path.ptr, "A");
/* Put 'A' into the index */
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_add_bypath(index, "A"));
cl_git_pass(git_index_write(index));
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(0, git_diff_num_deltas(diff));
git_diff_free(diff);
/* Change its contents quickly, so we get the same timestamp */
cl_git_mkfile(path.ptr, "B");
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
git_index_free(index);
git_diff_free(diff);
git_buf_free(&path);
}
void test_index_racy__write_index_just_after_file(void)
{
git_index *index;
git_diff *diff;
git_buf path = GIT_BUF_INIT;
struct 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 happend 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_free(&path);
git_diff_free(diff);
git_index_free(index);
}
static void setup_race(void)
{
git_buf path = GIT_BUF_INIT;
git_index *index;
const git_index_entry *entry;
int i, found_race = 0;
/* Make sure we do have a timestamp */
cl_git_pass(git_repository_index__weakptr(&index, g_repo));
cl_git_pass(git_index_write(index));
cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
/* Make sure writing the file, adding and rewriting happen in the same second */
for (i = 0; i < 10; i++) {
struct stat st;
cl_git_mkfile(path.ptr, "A");
cl_git_pass(git_index_add_bypath(index, "A"));
cl_git_mkfile(path.ptr, "B");
cl_git_pass(git_index_write(index));
cl_git_mkfile(path.ptr, "");
cl_git_pass(p_stat(path.ptr, &st));
cl_assert(entry = git_index_get_bypath(index, "A", 0));
if (entry->mtime.seconds == (int32_t) st.st_mtime) {
found_race = 1;
break;
}
}
if (!found_race)
cl_fail("failed to find race after 10 attempts");
git_buf_free(&path);
}
void test_index_racy__smudges_index_entry_on_save(void)
{
git_index *index;
const git_index_entry *entry;
setup_race();
/* write the index, which will smudge anything that had the same timestamp
* as the index when the index was loaded. that way future loads of the
* index (with the new timestamp) will know that these files were not
* clean.
*/
cl_git_pass(git_repository_index__weakptr(&index, g_repo));
cl_git_pass(git_index_write(index));
cl_assert(entry = git_index_get_bypath(index, "A", 0));
cl_assert_equal_i(0, entry->file_size);
}
void test_index_racy__detects_diff_of_change_in_identical_timestamp(void)
{
git_index *index;
git_diff *diff;
cl_git_pass(git_repository_index__weakptr(&index, g_repo));
setup_race();
cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
cl_assert_equal_i(1, git_diff_num_deltas(diff));
git_diff_free(diff);
}
static void setup_uptodate_files(void)
{
git_buf path = GIT_BUF_INIT;
git_index *index;
git_index_entry new_entry = {0};
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
cl_git_mkfile(path.ptr, "A");
/* Put 'A' into the index */
cl_git_pass(git_index_add_bypath(index, "A"));
/* Put 'B' into the index */
new_entry.path = "B";
new_entry.mode = GIT_FILEMODE_BLOB;
cl_git_pass(git_index_add(index, &new_entry));
/* Put 'C' into the index */
new_entry.path = "C";
new_entry.mode = GIT_FILEMODE_BLOB;
cl_git_pass(git_index_add_frombuffer(index, &new_entry, "hello!\n", 7));
git_index_free(index);
git_buf_free(&path);
}
void test_index_racy__adding_to_index_is_uptodate(void)
{
git_index *index;
const git_index_entry *entry;
setup_uptodate_files();
cl_git_pass(git_repository_index(&index, g_repo));
/* ensure that they're all uptodate */
cl_assert((entry = git_index_get_bypath(index, "A", 0)));
cl_assert_equal_i(GIT_IDXENTRY_UPTODATE, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "B", 0)));
cl_assert_equal_i(GIT_IDXENTRY_UPTODATE, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "C", 0)));
cl_assert_equal_i(GIT_IDXENTRY_UPTODATE, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_git_pass(git_index_write(index));
git_index_free(index);
}
void test_index_racy__reading_clears_uptodate_bit(void)
{
git_index *index;
const git_index_entry *entry;
setup_uptodate_files();
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_write(index));
cl_git_pass(git_index_read(index, true));
/* ensure that no files are uptodate */
cl_assert((entry = git_index_get_bypath(index, "A", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "B", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "C", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
git_index_free(index);
}
void test_index_racy__read_tree_clears_uptodate_bit(void)
{
git_index *index;
git_tree *tree;
const git_index_entry *entry;
git_oid id;
setup_uptodate_files();
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_write_tree_to(&id, index, g_repo));
cl_git_pass(git_tree_lookup(&tree, g_repo, &id));
cl_git_pass(git_index_read_tree(index, tree));
/* ensure that no files are uptodate */
cl_assert((entry = git_index_get_bypath(index, "A", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "B", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(index, "C", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
git_tree_free(tree);
git_index_free(index);
}
void test_index_racy__read_index_smudges(void)
{
git_index *index, *newindex;
const git_index_entry *entry;
/* if we are reading an index into our new index, ensure that any
* racy entries in the index that we're reading are smudged so that
* we don't propagate their timestamps without further investigation.
*/
setup_race();
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_new(&newindex));
cl_git_pass(git_index_read_index(newindex, index));
cl_assert(entry = git_index_get_bypath(newindex, "A", 0));
cl_assert_equal_i(0, entry->file_size);
git_index_free(index);
git_index_free(newindex);
}
void test_index_racy__read_index_clears_uptodate_bit(void)
{
git_index *index, *newindex;
const git_index_entry *entry;
setup_uptodate_files();
cl_git_pass(git_repository_index(&index, g_repo));
cl_git_pass(git_index_new(&newindex));
cl_git_pass(git_index_read_index(newindex, index));
/* ensure that files brought in from the other index are not uptodate */
cl_assert((entry = git_index_get_bypath(newindex, "A", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(newindex, "B", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
cl_assert((entry = git_index_get_bypath(newindex, "C", 0)));
cl_assert_equal_i(0, (entry->flags_extended & GIT_IDXENTRY_UPTODATE));
git_index_free(index);
git_index_free(newindex);
}
