thodg/libgit2/tests/odb/freshen.c

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• Hash : f0e693b1
  Author :
  Date : 2021-09-07T17:53:49
  

  str: introduce `git_str` for internal, `git_buf` is external libgit2 has two distinct requirements that were previously solved by `git_buf`. We require: 1. A general purpose string class that provides a number of utility APIs for manipulating data (eg, concatenating, truncating, etc). 2. A structure that we can use to return strings to callers that they can take ownership of. By using a single class (`git_buf`) for both of these purposes, we have confused the API to the point that refactorings are difficult and reasoning about correctness is also difficult. Move the utility class `git_buf` to be called `git_str`: this represents its general purpose, as an internal string buffer class. The name also is an homage to Junio Hamano ("gitstr"). The public API remains `git_buf`, and has a much smaller footprint. It is generally only used as an "out" param with strict requirements that follow the documentation. (Exceptions exist for some legacy APIs to avoid breaking callers unnecessarily.) Utility functions exist to convert a user-specified `git_buf` to a `git_str` so that we can call internal functions, then converting it back again.

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• tests/odb/freshen.c

• #include "clar_libgit2.h"
  #include "odb.h"
  #include "posix.h"
  
  static git_repository *repo;
  static git_odb *odb;
  
  void test_odb_freshen__initialize(void)
  {
  	repo = cl_git_sandbox_init("testrepo.git");
  	cl_git_pass(git_repository_odb(&odb, repo));
  }
  
  void test_odb_freshen__cleanup(void)
  {
  	git_odb_free(odb);
  	cl_git_sandbox_cleanup();
  }
  
  static void set_time_wayback(struct stat *out, const char *fn)
  {
  	git_str fullpath = GIT_STR_INIT;
  	struct p_timeval old[2];
  
  	old[0].tv_sec = 1234567890;
  	old[0].tv_usec = 0;
  	old[1].tv_sec = 1234567890;
  	old[1].tv_usec = 0;
  
  	git_str_joinpath(&fullpath, "testrepo.git/objects", fn);
  
  	cl_must_pass(p_utimes(git_str_cstr(&fullpath), old));
  	cl_must_pass(p_lstat(git_str_cstr(&fullpath), out));
  	git_str_dispose(&fullpath);
  }
  
  #define LOOSE_STR     "my new file\n"
  #define LOOSE_BLOB_ID "a71586c1dfe8a71c6cbf6c129f404c5642ff31bd"
  #define LOOSE_BLOB_FN "a7/1586c1dfe8a71c6cbf6c129f404c5642ff31bd"
  
  void test_odb_freshen__loose_blob(void)
  {
  	git_oid expected_id, id;
  	struct stat before, after;
  
  	cl_git_pass(git_oid_fromstr(&expected_id, LOOSE_BLOB_ID));
  	set_time_wayback(&before, LOOSE_BLOB_FN);
  
  	/* make sure we freshen a blob */
  	cl_git_pass(git_blob_create_from_buffer(&id, repo, LOOSE_STR, CONST_STRLEN(LOOSE_STR)));
  	cl_assert_equal_oid(&expected_id, &id);
  	cl_must_pass(p_lstat("testrepo.git/objects/" LOOSE_BLOB_FN, &after));
  
  	cl_assert(before.st_atime < after.st_atime);
  	cl_assert(before.st_mtime < after.st_mtime);
  }
  
  #define UNIQUE_STR     "doesnt exist in the odb yet\n"
  #define UNIQUE_BLOB_ID "78a87d0b8878c5953b9a63015ff4e22a3d898826"
  #define UNIQUE_BLOB_FN "78/a87d0b8878c5953b9a63015ff4e22a3d898826"
  
  void test_odb_freshen__readonly_object(void)
  {
  	git_oid expected_id, id;
  	struct stat before, after;
  
  	cl_git_pass(git_oid_fromstr(&expected_id, UNIQUE_BLOB_ID));
  
  	cl_git_pass(git_blob_create_from_buffer(&id, repo, UNIQUE_STR, CONST_STRLEN(UNIQUE_STR)));
  	cl_assert_equal_oid(&expected_id, &id);
  
  	set_time_wayback(&before, UNIQUE_BLOB_FN);
  	cl_assert((before.st_mode & S_IWUSR) == 0);
  
  	cl_git_pass(git_blob_create_from_buffer(&id, repo, UNIQUE_STR, CONST_STRLEN(UNIQUE_STR)));
  	cl_assert_equal_oid(&expected_id, &id);
  	cl_must_pass(p_lstat("testrepo.git/objects/" UNIQUE_BLOB_FN, &after));
  
  	cl_assert(before.st_atime < after.st_atime);
  	cl_assert(before.st_mtime < after.st_mtime);
  }
  
  #define LOOSE_TREE_ID "944c0f6e4dfa41595e6eb3ceecdb14f50fe18162"
  #define LOOSE_TREE_FN "94/4c0f6e4dfa41595e6eb3ceecdb14f50fe18162"
  
  void test_odb_freshen__loose_tree(void)
  {
  	git_oid expected_id, id;
  	git_tree *tree;
  	struct stat before, after;
  
  	cl_git_pass(git_oid_fromstr(&expected_id, LOOSE_TREE_ID));
  	set_time_wayback(&before, LOOSE_TREE_FN);
  
  	cl_git_pass(git_tree_lookup(&tree, repo, &expected_id));
  	cl_git_pass(git_tree_create_updated(&id, repo, tree, 0, NULL));
  
  	/* make sure we freshen a tree */
  	cl_assert_equal_oid(&expected_id, &id);
  	cl_must_pass(p_lstat("testrepo.git/objects/" LOOSE_TREE_FN, &after));
  
  	cl_assert(before.st_atime < after.st_atime);
  	cl_assert(before.st_mtime < after.st_mtime);
  
  	git_tree_free(tree);
  }
  
  void test_odb_freshen__tree_during_commit(void)
  {
  	git_oid tree_id, parent_id, commit_id;
  	git_tree *tree;
  	git_commit *parent;
  	git_signature *signature;
  	struct stat before, after;
  
  	cl_git_pass(git_oid_fromstr(&tree_id, LOOSE_TREE_ID));
  	cl_git_pass(git_tree_lookup(&tree, repo, &tree_id));
  	set_time_wayback(&before, LOOSE_TREE_FN);
  
  	cl_git_pass(git_oid_fromstr(&parent_id, "a65fedf39aefe402d3bb6e24df4d4f5fe4547750"));
  	cl_git_pass(git_commit_lookup(&parent, repo, &parent_id));
  
  	cl_git_pass(git_signature_new(&signature,
  		"Refresher", "refresher@example.com", 1488547083, 0));
  
  	cl_git_pass(git_commit_create(&commit_id, repo, NULL,
  		signature, signature, NULL, "New commit pointing to old tree",
  		tree, 1, (const git_commit **)&parent));
  
  	/* make sure we freshen the tree the commit points to */
  	cl_must_pass(p_lstat("testrepo.git/objects/" LOOSE_TREE_FN, &after));
  	cl_assert(before.st_atime < after.st_atime);
  	cl_assert(before.st_mtime < after.st_mtime);
  
  	git_signature_free(signature);
  	git_commit_free(parent);
  	git_tree_free(tree);
  }
  
  #define PACKED_STR "Testing a readme.txt\n"
  #define PACKED_ID  "6336846bd5c88d32f93ae57d846683e61ab5c530"
  #define PACKED_FN  "pack-d85f5d483273108c9d8dd0e4728ccf0b2982423a.pack"
  
  void test_odb_freshen__packed_object(void)
  {
  	git_oid expected_id, id;
  	struct stat before, after;
  	struct p_timeval old_times[2];
  
  	cl_git_pass(git_oid_fromstr(&expected_id, PACKED_ID));
  
  	old_times[0].tv_sec = 1234567890;
  	old_times[0].tv_usec = 0;
  	old_times[1].tv_sec = 1234567890;
  	old_times[1].tv_usec = 0;
  
  	/* set time to way back */
  	cl_must_pass(p_utimes("testrepo.git/objects/pack/" PACKED_FN, old_times));
  	cl_must_pass(p_lstat("testrepo.git/objects/pack/" PACKED_FN, &before));
  
  	/* ensure that packfile is freshened */
  	cl_git_pass(git_odb_write(&id, odb, PACKED_STR,
  		CONST_STRLEN(PACKED_STR), GIT_OBJECT_BLOB));
  	cl_assert_equal_oid(&expected_id, &id);
  	cl_must_pass(p_lstat("testrepo.git/objects/pack/" PACKED_FN, &after));
  
  	cl_assert(before.st_atime < after.st_atime);
  	cl_assert(before.st_mtime < after.st_mtime);
  
  	memcpy(&before, &after, sizeof(struct stat));
  
  	/* ensure that the pack file is not freshened again immediately */
  	cl_git_pass(git_odb_write(&id, odb, PACKED_STR,
  		CONST_STRLEN(PACKED_STR), GIT_OBJECT_BLOB));
  	cl_assert_equal_oid(&expected_id, &id);
  	cl_must_pass(p_lstat("testrepo.git/objects/pack/" PACKED_FN, &after));
  
  	cl_assert(before.st_atime == after.st_atime);
  	cl_assert(before.st_atime_nsec == after.st_atime_nsec);
  	cl_assert(before.st_mtime == after.st_mtime);
  	cl_assert(before.st_mtime_nsec == after.st_mtime_nsec);
  }
  
  

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