thodg/libgit2/tests/win32/longpath.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/win32/longpath.c

• #include "clar_libgit2.h"
  
  #include "git2/clone.h"
  #include "clone.h"
  #include "futils.h"
  #include "repository.h"
  
  static git_str path = GIT_STR_INIT;
  
  #define LONG_FILENAME "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.txt"
  
  void test_win32_longpath__initialize(void)
  {
  #ifdef GIT_WIN32
  	const char *base = clar_sandbox_path();
  	size_t base_len = strlen(base);
  	size_t remain = MAX_PATH - base_len;
  	size_t i;
  
  	git_str_clear(&path);
  	git_str_puts(&path, base);
  	git_str_putc(&path, '/');
  
  	cl_assert(remain < (MAX_PATH - 5));
  
  	for (i = 0; i < (remain - 5); i++)
  		git_str_putc(&path, 'a');
  #endif
  }
  
  void test_win32_longpath__cleanup(void)
  {
  	git_str_dispose(&path);
  	cl_git_sandbox_cleanup();
  }
  
  void test_win32_longpath__errmsg_on_checkout(void)
  {
  #ifdef GIT_WIN32
  	git_repository *repo;
  
  	cl_git_fail(git_clone(&repo, cl_fixture("testrepo.git"), path.ptr, NULL));
  	cl_assert(git__prefixcmp(git_error_last()->message, "path too long") == 0);
  #endif
  }
  
  void test_win32_longpath__workdir_path_validated(void)
  {
  #ifdef GIT_WIN32
  	git_repository *repo = cl_git_sandbox_init("testrepo");
  	git_str out = GIT_STR_INIT;
  
  	cl_git_pass(git_repository_workdir_path(&out, repo, "a.txt"));
  
  	/* even if the repo path is a drive letter, this is too long */
  	cl_git_fail(git_repository_workdir_path(&out, repo, LONG_FILENAME));
  	cl_assert(git__prefixcmp(git_error_last()->message, "path too long") == 0);
  
  	cl_repo_set_bool(repo, "core.longpaths", true);
  	cl_git_pass(git_repository_workdir_path(&out, repo, "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa.txt"));
  	cl_git_pass(git_repository_workdir_path(&out, repo, LONG_FILENAME));
  	git_str_dispose(&out);
  #endif
  }
  
  #ifdef GIT_WIN32
  static void assert_longpath_status_and_add(git_repository *repo, const char *wddata, const char *repodata) {
  	git_index *index;
  	git_blob *blob;
  	git_str out = GIT_STR_INIT;
  	const git_index_entry *entry;
  	unsigned int status_flags;
  
  	cl_git_pass(git_repository_workdir_path(&out, repo, LONG_FILENAME));
  
  	cl_git_rewritefile(out.ptr, wddata);
  
  	cl_git_pass(git_status_file(&status_flags, repo, LONG_FILENAME));
  	cl_assert_equal_i(GIT_STATUS_WT_NEW, status_flags);
  
  	cl_git_pass(git_repository_index(&index, repo));
  	cl_git_pass(git_index_add_bypath(index, LONG_FILENAME));
  
  	cl_git_pass(git_status_file(&status_flags, repo, LONG_FILENAME));
  	cl_assert_equal_i(GIT_STATUS_INDEX_NEW, status_flags);
  
  	cl_assert((entry = git_index_get_bypath(index, LONG_FILENAME, 0)) != NULL);
  	cl_git_pass(git_blob_lookup(&blob, repo, &entry->id));
  	cl_assert_equal_s(repodata, git_blob_rawcontent(blob));
  
  	git_blob_free(blob);
  	git_index_free(index);
  	git_str_dispose(&out);
  }
  #endif
  
  void test_win32_longpath__status_and_add(void)
  {
  #ifdef GIT_WIN32
  	git_repository *repo = cl_git_sandbox_init("testrepo");
  
  	cl_repo_set_bool(repo, "core.longpaths", true);
  
  	/*
  	 * Doing no content filtering, we expect the data we add
  	 * to be the data in the repository.
  	 */
  	assert_longpath_status_and_add(repo,
  	    "This is a long path.\r\n",
  	    "This is a long path.\r\n");
  #endif
  }
  
  void test_win32_longpath__status_and_add_with_filter(void)
  {
  #ifdef GIT_WIN32
  	git_repository *repo = cl_git_sandbox_init("testrepo");
  
  	cl_repo_set_bool(repo, "core.longpaths", true);
  	cl_repo_set_bool(repo, "core.autocrlf", true);
  
  	/*
  	 * With `core.autocrlf`, we expect the data we add to have
  	 * newline conversion performed.
  	 */
  	assert_longpath_status_and_add(repo,
  	    "This is a long path.\r\n",
  	    "This is a long path.\n");
  #endif
  }
  

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