thodg/libgit2/tests/odb/foreach.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/foreach.c

• #include "clar_libgit2.h"
  #include "odb.h"
  #include "git2/odb_backend.h"
  #include "pack.h"
  
  static git_odb *_odb;
  static git_repository *_repo;
  
  void test_odb_foreach__cleanup(void)
  {
  	git_odb_free(_odb);
  	git_repository_free(_repo);
  
  	_odb = NULL;
  	_repo = NULL;
  }
  
  static int foreach_cb(const git_oid *oid, void *data)
  {
  	int *nobj = data;
  	(*nobj)++;
  
  	GIT_UNUSED(oid);
  
  	return 0;
  }
  
  /*
   * $ git --git-dir tests/resources/testrepo.git count-objects --verbose
   * count: 60
   * size: 240
   * in-pack: 1640
   * packs: 3
   * size-pack: 425
   * prune-packable: 0
   * garbage: 0
   */
  void test_odb_foreach__foreach(void)
  {
  	int nobj = 0;
  
  	cl_git_pass(git_repository_open(&_repo, cl_fixture("testrepo.git")));
  	git_repository_odb(&_odb, _repo);
  
  	cl_git_pass(git_odb_foreach(_odb, foreach_cb, &nobj));
  	cl_assert_equal_i(60 + 1640, nobj); /* count + in-pack */
  }
  
  void test_odb_foreach__one_pack(void)
  {
  	git_odb_backend *backend = NULL;
  	int nobj = 0;
  
  	cl_git_pass(git_odb_new(&_odb));
  	cl_git_pass(git_odb_backend_one_pack(&backend, cl_fixture("testrepo.git/objects/pack/pack-a81e489679b7d3418f9ab594bda8ceb37dd4c695.idx")));
  	cl_git_pass(git_odb_add_backend(_odb, backend, 1));
  	_repo = NULL;
  
  	cl_git_pass(git_odb_foreach(_odb, foreach_cb, &nobj));
  	cl_assert(nobj == 1628);
  }
  
  static int foreach_stop_cb(const git_oid *oid, void *data)
  {
  	int *nobj = data;
  	(*nobj)++;
  
  	GIT_UNUSED(oid);
  
  	return (*nobj == 1000) ? -321 : 0;
  }
  
  static int foreach_stop_first_cb(const git_oid *oid, void *data)
  {
  	int *nobj = data;
  	(*nobj)++;
  
  	GIT_UNUSED(oid);
  
  	return -123;
  }
  
  static int foreach_stop_cb_positive_ret(const git_oid *oid, void *data)
  {
  	int *nobj = data;
  	(*nobj)++;
  
  	GIT_UNUSED(oid);
  
  	return (*nobj == 1000) ? 321 : 0;
  }
  
  void test_odb_foreach__interrupt_foreach(void)
  {
  	int nobj = 0;
  	git_oid id;
  
  	cl_git_pass(git_repository_open(&_repo, cl_fixture("testrepo.git")));
  	git_repository_odb(&_odb, _repo);
  
  	cl_assert_equal_i(-321, git_odb_foreach(_odb, foreach_stop_cb, &nobj));
  	cl_assert(nobj == 1000);
  
  	nobj = 0;
  
  	cl_assert_equal_i(321, git_odb_foreach(_odb, foreach_stop_cb_positive_ret, &nobj));
  	cl_assert(nobj == 1000);
  
  	git_odb_free(_odb);
  	git_repository_free(_repo);
  
  	cl_git_pass(git_repository_init(&_repo, "onlyloose.git", true));
  	git_repository_odb(&_odb, _repo);
  
  	cl_git_pass(git_odb_write(&id, _odb, "", 0, GIT_OBJECT_BLOB));
  	cl_assert_equal_i(-123, git_odb_foreach(_odb, foreach_stop_first_cb, &nobj));
  }
  
  void test_odb_foreach__files_in_objects_dir(void)
  {
  	git_repository *repo;
  	git_odb *odb;
  	git_str buf = GIT_STR_INIT;
  	int nobj = 0;
  
  	cl_fixture_sandbox("testrepo.git");
  	cl_git_pass(git_repository_open(&repo, "testrepo.git"));
  
  	cl_git_pass(git_str_joinpath(&buf, git_repository_path(repo), "objects/somefile"));
  	cl_git_mkfile(buf.ptr, "");
  	git_str_dispose(&buf);
  
  	cl_git_pass(git_repository_odb(&odb, repo));
  	cl_git_pass(git_odb_foreach(odb, foreach_cb, &nobj));
  	cl_assert_equal_i(60 + 1640, nobj); /* count + in-pack */
  
  	git_odb_free(odb);
  	git_repository_free(repo);
  	cl_fixture_cleanup("testrepo.git");
  }
  

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