thodg/libgit2

diff --git a/src/repository.c b/src/repository.c
index 7bdcefd..5c44423 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -410,7 +410,7 @@ static int find_repo(
 					break;
 				}
 			}
-			else if (S_ISREG(st.st_mode)) {
+			else if (S_ISREG(st.st_mode) && git__suffixcmp(path.ptr, "/" DOT_GIT) == 0) {
 				error = read_gitfile(&repo_link, path.ptr);
 				if (error < 0)
 					break;
diff --git a/tests/repo/discover.c b/tests/repo/discover.c
index 358daee..48aa275 100644
--- a/tests/repo/discover.c
+++ b/tests/repo/discover.c
@@ -9,6 +9,7 @@
 
 #define SUB_REPOSITORY_FOLDER_NAME "sub_repo"
 #define SUB_REPOSITORY_FOLDER DISCOVER_FOLDER "/" SUB_REPOSITORY_FOLDER_NAME
+#define SUB_REPOSITORY_GITDIR SUB_REPOSITORY_FOLDER "/.git"
 #define SUB_REPOSITORY_FOLDER_SUB SUB_REPOSITORY_FOLDER "/sub"
 #define SUB_REPOSITORY_FOLDER_SUB_SUB SUB_REPOSITORY_FOLDER_SUB "/subsub"
 #define SUB_REPOSITORY_FOLDER_SUB_SUB_SUB SUB_REPOSITORY_FOLDER_SUB_SUB "/subsubsub"
@@ -24,20 +25,26 @@
 #define ALTERNATE_NOT_FOUND_FOLDER DISCOVER_FOLDER "/alternate_not_found_repo"
 
 static void ensure_repository_discover(const char *start_path,
-                                       const char *ceiling_dirs,
-				       git_buf *expected_path)
+				       const char *ceiling_dirs,
+				       const char *expected_path)
 {
-	git_buf found_path = GIT_BUF_INIT;
+	git_buf found_path = GIT_BUF_INIT, resolved = GIT_BUF_INIT;
+
+	git_buf_attach(&resolved, p_realpath(expected_path, NULL), 0);
+	cl_assert(resolved.size > 0);
+	cl_git_pass(git_path_to_dir(&resolved));
 	cl_git_pass(git_repository_discover(&found_path, start_path, 0, ceiling_dirs));
-	//across_fs is always 0 as we can't automate the filesystem change tests
-	cl_assert_equal_s(found_path.ptr, expected_path->ptr);
+
+	cl_assert_equal_s(found_path.ptr, resolved.ptr);
+
+	git_buf_free(&resolved);
 	git_buf_free(&found_path);
 }
 
 static void write_file(const char *path, const char *content)
 {
 	git_file file;
-   int error;
+	int error;
 
 	if (git_path_exists(path)) {
 		cl_git_pass(p_unlink(path));
@@ -68,42 +75,30 @@ static void append_ceiling_dir(git_buf *ceiling_dirs, const char *path)
 	cl_assert(git_buf_oom(ceiling_dirs) == 0);
 }
 
-void test_repo_discover__0(void)
+static git_buf discovered;
+static git_buf ceiling_dirs;
+
+void test_repo_discover__initialize(void)
 {
-	// test discover
 	git_repository *repo;
-	git_buf ceiling_dirs_buf = GIT_BUF_INIT, repository_path = GIT_BUF_INIT,
-		sub_repository_path = GIT_BUF_INIT, found_path = GIT_BUF_INIT;
-	const char *ceiling_dirs;
 	const mode_t mode = 0777;
-
 	git_futils_mkdir_r(DISCOVER_FOLDER, mode);
-	append_ceiling_dir(&ceiling_dirs_buf, TEMP_REPO_FOLDER);
-	ceiling_dirs = git_buf_cstr(&ceiling_dirs_buf);
 
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&repository_path, DISCOVER_FOLDER, 0, ceiling_dirs));
+	git_buf_init(&discovered, 0);
+	git_buf_init(&ceiling_dirs, 0);
+	append_ceiling_dir(&ceiling_dirs, TEMP_REPO_FOLDER);
 
 	cl_git_pass(git_repository_init(&repo, DISCOVER_FOLDER, 1));
-	cl_git_pass(git_repository_discover(&repository_path, DISCOVER_FOLDER, 0, ceiling_dirs));
 	git_repository_free(repo);
 
 	cl_git_pass(git_repository_init(&repo, SUB_REPOSITORY_FOLDER, 0));
 	cl_git_pass(git_futils_mkdir_r(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, mode));
-	cl_git_pass(git_repository_discover(&sub_repository_path, SUB_REPOSITORY_FOLDER, 0, ceiling_dirs));
-
 	cl_git_pass(git_futils_mkdir_r(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, mode));
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, ceiling_dirs, &sub_repository_path);
 
 	cl_git_pass(git_futils_mkdir_r(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, mode));
 	write_file(REPOSITORY_ALTERNATE_FOLDER "/" DOT_GIT, "gitdir: ../" SUB_REPOSITORY_FOLDER_NAME "/" DOT_GIT);
 	write_file(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB "/" DOT_GIT, "gitdir: ../../../" SUB_REPOSITORY_FOLDER_NAME "/" DOT_GIT);
 	write_file(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB "/" DOT_GIT, "gitdir: ../../../../");
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs, &repository_path);
 
 	cl_git_pass(git_futils_mkdir_r(ALTERNATE_MALFORMED_FOLDER1, mode));
 	write_file(ALTERNATE_MALFORMED_FOLDER1 "/" DOT_GIT, "Anything but not gitdir:");
@@ -113,41 +108,94 @@ void test_repo_discover__0(void)
 	write_file(ALTERNATE_MALFORMED_FOLDER3 "/" DOT_GIT, "gitdir: \n\n\n");
 	cl_git_pass(git_futils_mkdir_r(ALTERNATE_NOT_FOUND_FOLDER, mode));
 	write_file(ALTERNATE_NOT_FOUND_FOLDER "/" DOT_GIT, "gitdir: a_repository_that_surely_does_not_exist");
-	cl_git_fail(git_repository_discover(&found_path, ALTERNATE_MALFORMED_FOLDER1, 0, ceiling_dirs));
-	cl_git_fail(git_repository_discover(&found_path, ALTERNATE_MALFORMED_FOLDER2, 0, ceiling_dirs));
-	cl_git_fail(git_repository_discover(&found_path, ALTERNATE_MALFORMED_FOLDER3, 0, ceiling_dirs));
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, ALTERNATE_NOT_FOUND_FOLDER, 0, ceiling_dirs));
 
-	append_ceiling_dir(&ceiling_dirs_buf, SUB_REPOSITORY_FOLDER_SUB);
-	ceiling_dirs = git_buf_cstr(&ceiling_dirs_buf);
+	git_repository_free(repo);
+}
+
+void test_repo_discover__cleanup(void)
+{
+	git_buf_free(&discovered);
+	git_buf_free(&ceiling_dirs);
+	cl_git_pass(git_futils_rmdir_r(TEMP_REPO_FOLDER, NULL, GIT_RMDIR_REMOVE_FILES));
+}
+
+void test_repo_discover__discovering_repo_with_exact_path_succeeds(void)
+{
+	cl_git_pass(git_repository_discover(&discovered, DISCOVER_FOLDER, 0, ceiling_dirs.ptr));
+	cl_git_pass(git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER, 0, ceiling_dirs.ptr));
+}
+
+void test_repo_discover__discovering_nonexistent_dir_fails(void)
+{
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, DISCOVER_FOLDER "-nonexistent", 0, NULL));
+}
+
+void test_repo_discover__discovering_repo_with_subdirectory_succeeds(void)
+{
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+}
+
+void test_repo_discover__discovering_repository_with_alternative_gitdir_succeeds(void)
+{
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs.ptr, DISCOVER_FOLDER);
+}
+
+void test_repo_discover__discovering_repository_with_malformed_alternative_gitdir_fails(void)
+{
+	cl_git_fail(git_repository_discover(&discovered, ALTERNATE_MALFORMED_FOLDER1, 0, ceiling_dirs.ptr));
+	cl_git_fail(git_repository_discover(&discovered, ALTERNATE_MALFORMED_FOLDER2, 0, ceiling_dirs.ptr));
+	cl_git_fail(git_repository_discover(&discovered, ALTERNATE_MALFORMED_FOLDER3, 0, ceiling_dirs.ptr));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, ALTERNATE_NOT_FOUND_FOLDER, 0, ceiling_dirs.ptr));
+}
+
+void test_repo_discover__discovering_repository_with_ceiling(void)
+{
+	append_ceiling_dir(&ceiling_dirs, SUB_REPOSITORY_FOLDER_SUB);
 
 	/* this must pass as ceiling_directories cannot prevent the current
 	 * working directory to be checked */
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB, ceiling_dirs, &sub_repository_path);
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, SUB_REPOSITORY_FOLDER_SUB_SUB, 0, ceiling_dirs));
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, 0, ceiling_dirs));
-
-	append_ceiling_dir(&ceiling_dirs_buf, SUB_REPOSITORY_FOLDER);
-	ceiling_dirs = git_buf_cstr(&ceiling_dirs_buf);
-
-	//this must pass as ceiling_directories cannot predent the current
-	//working directory to be checked
-	ensure_repository_discover(SUB_REPOSITORY_FOLDER, ceiling_dirs, &sub_repository_path);
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, SUB_REPOSITORY_FOLDER_SUB, 0, ceiling_dirs));
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, SUB_REPOSITORY_FOLDER_SUB_SUB, 0, ceiling_dirs));
-	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&found_path, SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, 0, ceiling_dirs));
-
-	//.gitfile redirection should not be affected by ceiling directories
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs, &sub_repository_path);
-	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs, &repository_path);
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
 
-	cl_git_pass(git_futils_rmdir_r(TEMP_REPO_FOLDER, NULL, GIT_RMDIR_REMOVE_FILES));
-	git_repository_free(repo);
-	git_buf_free(&ceiling_dirs_buf);
-	git_buf_free(&repository_path);
-	git_buf_free(&sub_repository_path);
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER_SUB_SUB, 0, ceiling_dirs.ptr));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, 0, ceiling_dirs.ptr));
+}
+
+void test_repo_discover__other_ceiling(void)
+{
+	append_ceiling_dir(&ceiling_dirs, SUB_REPOSITORY_FOLDER);
+
+	/* this must pass as ceiling_directories cannot predent the current
+	 * working directory to be checked */
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER_SUB, 0, ceiling_dirs.ptr));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER_SUB_SUB, 0, ceiling_dirs.ptr));
+	cl_assert_equal_i(GIT_ENOTFOUND, git_repository_discover(&discovered, SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, 0, ceiling_dirs.ptr));
 }
 
+void test_repo_discover__ceiling_should_not_affect_gitdir_redirection(void)
+{
+	append_ceiling_dir(&ceiling_dirs, SUB_REPOSITORY_FOLDER);
+
+	/* gitfile redirection should not be affected by ceiling directories */
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+	ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs.ptr, DISCOVER_FOLDER);
+}
+
+void test_repo_discover__discovery_starting_at_file_succeeds(void)
+{
+	int fd;
+
+	cl_assert((fd = p_creat(SUB_REPOSITORY_FOLDER "/file", 0600)) >= 0);
+	cl_assert(p_close(fd) == 0);
+
+	ensure_repository_discover(SUB_REPOSITORY_FOLDER "/file", ceiling_dirs.ptr, SUB_REPOSITORY_GITDIR);
+}