Merge pull request #3434 from ethomson/reservednames

Win32 Reserved names: don't reserve names outside the working directory

src/repository.c

@@ -908,12 +908,28 @@ bool git_repository__reserved_names(
 			buf->size = git_repository__reserved_names_win32[i].size;
 		}
 
-		/* Try to add any repo-specific reserved names */
+		/* Try to add any repo-specific reserved names - the gitlink file
+		 * within a submodule or the repository (if the repository directory
+		 * is beneath the workdir).  These are typically `.git`, but should
+		 * be protected in case they are not.  Note, repo and workdir paths
+		 * are always prettified to end in `/`, so a prefixcmp is safe.
+		 */
 		if (!repo->is_bare) {
-			const char *reserved_path = repo->path_gitlink ?
-				repo->path_gitlink : repo->path_repository;
+			int (*prefixcmp)(const char *, const char *);
+			int error, ignorecase;
 
-			if (reserved_names_add8dot3(repo, reserved_path) < 0)
+			error = git_repository__cvar(
+				&ignorecase, repo, GIT_CVAR_IGNORECASE);
+			prefixcmp = (error || ignorecase) ? git__prefixcmp_icase :
+				git__prefixcmp;
+
+			if (repo->path_gitlink &&
+				reserved_names_add8dot3(repo, repo->path_gitlink) < 0)
+				goto on_error;
+
+			if (repo->path_repository &&
+				prefixcmp(repo->path_repository, repo->workdir) == 0 &&
+				reserved_names_add8dot3(repo, repo->path_repository) < 0)
 				goto on_error;
 		}
 	}

tests/repo/reservedname.c

@@ -106,3 +106,27 @@ void test_repo_reservedname__submodule_pointer(void)
 	git_repository_free(sub_repo);
 #endif
 }
+
+/* Like the `submodule_pointer` test (above), this ensures that we do not
+ * follow the gitlink to the submodule's repository location and treat that
+ * as a reserved name.  This tests at an initial submodule update, where the
+ * submodule repo is being created.
+ */
+void test_repo_reservedname__submodule_pointer_during_create(void)
+{
+	git_repository *repo;
+	git_submodule *sm;
+	git_submodule_update_options update_options = GIT_SUBMODULE_UPDATE_OPTIONS_INIT;
+	git_buf url = GIT_BUF_INIT;
+
+	repo = setup_fixture_super();
+
+	cl_git_pass(git_buf_joinpath(&url, clar_sandbox_path(), "sub.git"));
+	cl_repo_set_string(repo, "submodule.sub.url", url.ptr);
+
+	cl_git_pass(git_submodule_lookup(&sm, repo, "sub"));
+	cl_git_pass(git_submodule_update(sm, 1, &update_options));
+
+	git_submodule_free(sm);
+	git_buf_free(&url);
+}

tests/submodule/submodule_helpers.c

@@ -126,6 +126,22 @@ git_repository *setup_fixture_submod2(void)
 	return repo;
 }
 
+git_repository *setup_fixture_super(void)
+{
+	git_repository *repo = cl_git_sandbox_init("super");
+
+	cl_fixture_sandbox("sub.git");
+	p_mkdir("super/sub", 0777);
+
+	rewrite_gitmodules(git_repository_workdir(repo));
+
+	cl_set_cleanup(cleanup_fixture_submodules, "sub.git");
+
+	cl_git_pass(git_repository_reinit_filesystem(repo, 1));
+
+	return repo;
+}
+
 git_repository *setup_fixture_submodule_simple(void)
 {
 	git_repository *repo = cl_git_sandbox_init("submodule_simple");

tests/submodule/submodule_helpers.h

@@ -4,6 +4,7 @@ extern void rewrite_gitmodules(const char *workdir);
 extern git_repository *setup_fixture_submodules(void);
 extern git_repository *setup_fixture_submod2(void);
 extern git_repository *setup_fixture_submodule_simple(void);
+extern git_repository *setup_fixture_super(void);
 
 extern unsigned int get_submodule_status(git_repository *, const char *);