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https://git.proxmox.com/git/libgit2
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148 lines
3.8 KiB
C
148 lines
3.8 KiB
C
#include "clar_libgit2.h"
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#include "../checkout/checkout_helpers.h"
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#include "buffer.h"
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#include "index.h"
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#include "repository.h"
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static git_repository *g_repo;
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void test_index_racy__initialize(void)
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{
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cl_git_pass(git_repository_init(&g_repo, "diff_racy", false));
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}
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void test_index_racy__cleanup(void)
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{
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git_repository_free(g_repo);
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g_repo = NULL;
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cl_fixture_cleanup("diff_racy");
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}
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void test_index_racy__diff(void)
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{
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git_index *index;
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git_diff *diff;
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git_buf path = GIT_BUF_INIT;
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cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
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cl_git_mkfile(path.ptr, "A");
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/* Put 'A' into the index */
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cl_git_pass(git_repository_index(&index, g_repo));
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cl_git_pass(git_index_add_bypath(index, "A"));
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cl_git_pass(git_index_write(index));
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cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
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cl_assert_equal_i(0, git_diff_num_deltas(diff));
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git_diff_free(diff);
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/* Change its contents quickly, so we get the same timestamp */
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cl_git_mkfile(path.ptr, "B");
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cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
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cl_assert_equal_i(1, git_diff_num_deltas(diff));
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git_index_free(index);
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git_diff_free(diff);
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git_buf_free(&path);
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}
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void test_index_racy__write_index_just_after_file(void)
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{
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git_index *index;
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git_diff *diff;
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git_buf path = GIT_BUF_INIT;
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struct timeval times[2];
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/* Make sure we do have a timestamp */
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cl_git_pass(git_repository_index(&index, g_repo));
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cl_git_pass(git_index_write(index));
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cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
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cl_git_mkfile(path.ptr, "A");
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/* Force the file's timestamp to be a second after we wrote the index */
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times[0].tv_sec = index->stamp.mtime + 1;
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times[0].tv_usec = 0;
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times[1].tv_sec = index->stamp.mtime + 1;
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times[1].tv_usec = 0;
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cl_git_pass(p_utimes(path.ptr, times));
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/*
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* Put 'A' into the index, the size field will be filled,
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* because the index' on-disk timestamp does not match the
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* file's timestamp.
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*/
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cl_git_pass(git_index_add_bypath(index, "A"));
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cl_git_pass(git_index_write(index));
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cl_git_mkfile(path.ptr, "B");
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/*
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* Pretend this index' modification happend a second after the
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* file update, and rewrite the file in that same second.
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*/
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times[0].tv_sec = index->stamp.mtime + 2;
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times[0].tv_usec = 0;
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times[1].tv_sec = index->stamp.mtime + 2;
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times[0].tv_usec = 0;
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cl_git_pass(p_utimes(git_index_path(index), times));
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cl_git_pass(p_utimes(path.ptr, times));
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cl_git_pass(git_index_read(index, true));
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cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
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cl_assert_equal_i(1, git_diff_num_deltas(diff));
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git_buf_free(&path);
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git_diff_free(diff);
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git_index_free(index);
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}
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void test_index_racy__empty_file_after_smudge(void)
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{
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git_index *index;
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git_diff *diff;
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git_buf path = GIT_BUF_INIT;
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int i, found_race = 0;
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const git_index_entry *entry;
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/* Make sure we do have a timestamp */
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cl_git_pass(git_repository_index__weakptr(&index, g_repo));
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cl_git_pass(git_index_write(index));
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cl_git_pass(git_buf_joinpath(&path, git_repository_workdir(g_repo), "A"));
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/* Make sure writing the file, adding and rewriting happen in the same second */
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for (i = 0; i < 10; i++) {
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struct stat st;
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cl_git_mkfile(path.ptr, "A");
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cl_git_pass(git_index_add_bypath(index, "A"));
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cl_git_mkfile(path.ptr, "B");
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cl_git_pass(git_index_write(index));
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cl_git_mkfile(path.ptr, "");
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cl_git_pass(p_stat(path.ptr, &st));
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cl_assert(entry = git_index_get_bypath(index, "A", 0));
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if (entry->mtime.seconds == (int32_t) st.st_mtime) {
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found_race = 1;
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break;
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}
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}
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if (!found_race)
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cl_fail("failed to find race after 10 attempts");
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cl_assert_equal_i(0, entry->file_size);
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cl_git_pass(git_diff_index_to_workdir(&diff, g_repo, index, NULL));
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cl_assert_equal_i(1, git_diff_num_deltas(diff));
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git_buf_free(&path);
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git_diff_free(diff);
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}
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