thodg/libgit2/tests/submodule/escape.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/submodule/escape.c

• #include "clar_libgit2.h"
  #include "posix.h"
  #include "path.h"
  #include "submodule_helpers.h"
  #include "futils.h"
  #include "repository.h"
  
  static git_repository *g_repo = NULL;
  
  void test_submodule_escape__cleanup(void)
  {
  	cl_git_sandbox_cleanup();
  }
  
  #define EVIL_SM_NAME "../../modules/evil"
  #define EVIL_SM_NAME_WINDOWS "..\\\\..\\\\modules\\\\evil"
  #define EVIL_SM_NAME_WINDOWS_UNESC "..\\..\\modules\\evil"
  
  static int find_evil(git_submodule *sm, const char *name, void *payload)
  {
  	int *foundit = (int *) payload;
  
  	GIT_UNUSED(sm);
  
  	if (!git__strcmp(EVIL_SM_NAME, name) ||
  	    !git__strcmp(EVIL_SM_NAME_WINDOWS_UNESC, name))
  		*foundit = true;
  
  	return 0;
  }
  
  void test_submodule_escape__from_gitdir(void)
  {
  	int foundit;
  	git_submodule *sm;
  	git_str buf = GIT_STR_INIT;
  	unsigned int sm_location;
  
  	g_repo = setup_fixture_submodule_simple();
  
  	cl_git_pass(git_str_joinpath(&buf, git_repository_workdir(g_repo), ".gitmodules"));
  	cl_git_rewritefile(buf.ptr,
  			   "[submodule \"" EVIL_SM_NAME "\"]\n"
  			   "    path = testrepo\n"
  			   "    url = ../testrepo.git\n");
  	git_str_dispose(&buf);
  
  	/* Find it all the different ways we know about it */
  	foundit = 0;
  	cl_git_pass(git_submodule_foreach(g_repo, find_evil, &foundit));
  	cl_assert_equal_i(0, foundit);
  	cl_git_fail_with(GIT_ENOTFOUND, git_submodule_lookup(&sm, g_repo, EVIL_SM_NAME));
  	/*
  	 * We do know about this as it's in the index and HEAD, but the data is
  	 * incomplete as there is no configured data for it (we pretend it
  	 * doesn't exist). This leaves us with an odd situation but it's
  	 * consistent with what we would do if we did add a submodule with no
  	 * configuration.
  	 */
  	cl_git_pass(git_submodule_lookup(&sm, g_repo, "testrepo"));
  	cl_git_pass(git_submodule_location(&sm_location, sm));
  	cl_assert_equal_i(GIT_SUBMODULE_STATUS_IN_INDEX | GIT_SUBMODULE_STATUS_IN_HEAD, sm_location);
  	git_submodule_free(sm);
  }
  
  void test_submodule_escape__from_gitdir_windows(void)
  {
  	int foundit;
  	git_submodule *sm;
  	git_str buf = GIT_STR_INIT;
  	unsigned int sm_location;
  
  	g_repo = setup_fixture_submodule_simple();
  
  	cl_git_pass(git_str_joinpath(&buf, git_repository_workdir(g_repo), ".gitmodules"));
  	cl_git_rewritefile(buf.ptr,
  			   "[submodule \"" EVIL_SM_NAME_WINDOWS "\"]\n"
  			   "    path = testrepo\n"
  			   "    url = ../testrepo.git\n");
  	git_str_dispose(&buf);
  
  	/* Find it all the different ways we know about it */
  	foundit = 0;
  	cl_git_pass(git_submodule_foreach(g_repo, find_evil, &foundit));
  	cl_assert_equal_i(0, foundit);
  	cl_git_fail_with(GIT_ENOTFOUND, git_submodule_lookup(&sm, g_repo, EVIL_SM_NAME_WINDOWS_UNESC));
  	/*
  	 * We do know about this as it's in the index and HEAD, but the data is
  	 * incomplete as there is no configured data for it (we pretend it
  	 * doesn't exist). This leaves us with an odd situation but it's
  	 * consistent with what we would do if we did add a submodule with no
  	 * configuration.
  	 */
  	cl_git_pass(git_submodule_lookup(&sm, g_repo, "testrepo"));
  	cl_git_pass(git_submodule_location(&sm_location, sm));
  	cl_assert_equal_i(GIT_SUBMODULE_STATUS_IN_INDEX | GIT_SUBMODULE_STATUS_IN_HEAD, sm_location);
  	git_submodule_free(sm);
  }
  

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