thodg/libgit2/tests/refs/pack.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/refs/pack.c

• #include "clar_libgit2.h"
  
  #include "futils.h"
  #include "git2/reflog.h"
  #include "git2/refdb.h"
  #include "reflog.h"
  #include "refs.h"
  #include "ref_helpers.h"
  
  static const char *loose_tag_ref_name = "refs/tags/e90810b";
  
  static git_repository *g_repo;
  
  void test_refs_pack__initialize(void)
  {
     g_repo = cl_git_sandbox_init("testrepo");
  }
  
  void test_refs_pack__cleanup(void)
  {
     cl_git_sandbox_cleanup();
  }
  
  static void packall(void)
  {
  	git_refdb *refdb;
  
  	cl_git_pass(git_repository_refdb(&refdb, g_repo));
  	cl_git_pass(git_refdb_compress(refdb));
  	git_refdb_free(refdb);
  }
  
  void test_refs_pack__empty(void)
  {
  	/* create a packfile for an empty folder */
  	git_str temp_path = GIT_STR_INIT;
  
  	cl_git_pass(git_str_join_n(&temp_path, '/', 3, git_repository_path(g_repo), GIT_REFS_HEADS_DIR, "empty_dir"));
  	cl_git_pass(git_futils_mkdir_r(temp_path.ptr, GIT_REFS_DIR_MODE));
  	git_str_dispose(&temp_path);
  
  	packall();
  }
  
  void test_refs_pack__loose(void)
  {
  	/* create a packfile from all the loose refs in a repo */
  	git_reference *reference;
  	git_str temp_path = GIT_STR_INIT;
  
  	/* Ensure a known loose ref can be looked up */
  	cl_git_pass(git_reference_lookup(&reference, g_repo, loose_tag_ref_name));
  	cl_assert(reference_is_packed(reference) == 0);
  	cl_assert_equal_s(reference->name, loose_tag_ref_name);
  	git_reference_free(reference);
  
  	/*
  	 * We are now trying to pack also a loose reference
  	 * called `points_to_blob`, to make sure we can properly
  	 * pack weak tags
  	 */
  	packall();
  
  	/* Ensure the packed-refs file exists */
  	cl_git_pass(git_str_joinpath(&temp_path, git_repository_path(g_repo), GIT_PACKEDREFS_FILE));
  	cl_assert(git_path_exists(temp_path.ptr));
  
  	/* Ensure the known ref can still be looked up but is now packed */
  	cl_git_pass(git_reference_lookup(&reference, g_repo, loose_tag_ref_name));
  	cl_assert(reference_is_packed(reference));
  	cl_assert_equal_s(reference->name, loose_tag_ref_name);
  
  	/* Ensure the known ref has been removed from the loose folder structure */
  	cl_git_pass(git_str_joinpath(&temp_path, git_repository_path(g_repo), loose_tag_ref_name));
  	cl_assert(!git_path_exists(temp_path.ptr));
  
  	git_reference_free(reference);
  	git_str_dispose(&temp_path);
  }
  
  void test_refs_pack__symbolic(void)
  {
  	/* create a packfile from loose refs skipping symbolic refs */
  	int i;
  	git_oid head;
  	git_reference *ref;
  	char name[128];
  
  	cl_git_pass(git_reference_name_to_id(&head, g_repo, "HEAD"));
  
  	/* make a bunch of references */
  
  	for (i = 0; i < 100; ++i) {
  		p_snprintf(name, sizeof(name), "refs/heads/symbolic-%03d", i);
  		cl_git_pass(git_reference_symbolic_create(
  			&ref, g_repo, name, "refs/heads/master", 0, NULL));
  		git_reference_free(ref);
  
  		p_snprintf(name, sizeof(name), "refs/heads/direct-%03d", i);
  		cl_git_pass(git_reference_create(&ref, g_repo, name, &head, 0, NULL));
  		git_reference_free(ref);
  	}
  
  	packall();
  }
  

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