#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 + 1; times[0].tv_usec = 0; times[1].tv_sec = index->stamp.mtime + 1; times[1].tv_usec = 0; 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 + 2; times[0].tv_usec = 0; times[1].tv_sec = index->stamp.mtime + 2; times[0].tv_usec = 0; 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); } void test_index_racy__empty_file_after_smudge(void) { git_index *index; git_diff *diff; git_buf path = GIT_BUF_INIT; int i, found_race = 0; const git_index_entry *entry; /* 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"); cl_assert_equal_i(0, entry->file_size); 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); }