thodg/libgit2

diff --git a/src/fileops.c b/src/fileops.c
index 56bf292..b1a6bb8 100644
--- a/src/fileops.c
+++ b/src/fileops.c
@@ -380,7 +380,7 @@ int gitfo_mkdir_recurs(const char *path, int mode)
 	if (root_path_offset > 0)
 		pp += root_path_offset; /* On Windows, will skip the drive name (eg. C: or D:) */
 
-    while (error == GIT_SUCCESS && (sp = strchr(pp, '/')) != 0) {
+    while (error == GIT_SUCCESS && (sp = strchr(pp, '/')) != NULL) {
 		if (sp != pp && gitfo_isdir(path_copy) < GIT_SUCCESS) {
 			*sp = 0;
 			error = gitfo_mkdir(path_copy, mode);
@@ -395,8 +395,11 @@ int gitfo_mkdir_recurs(const char *path, int mode)
 		pp = sp + 1;
 	}
 
-	if (*(pp - 1) != '/' && error == GIT_SUCCESS)
+	if (*pp != '\0' && error == GIT_SUCCESS) {
 		error = gitfo_mkdir(path, mode);
+		if (errno == EEXIST)
+			error = GIT_SUCCESS;
+	}
 
 	free(path_copy);
 
diff --git a/src/repository.c b/src/repository.c
index 249755b..034e60a 100644
--- a/src/repository.c
+++ b/src/repository.c
@@ -330,7 +330,7 @@ static int abspath(char *buffer_out, size_t size, const char *path)
 	return GIT_SUCCESS;
 }
 
-static dev_t retrieve_device(dev_t *device_out, const char *path)
+static int retrieve_device(dev_t *device_out, const char *path)
 {
 	struct stat path_info;
 
@@ -369,8 +369,7 @@ static int retrieve_ceiling_directories_offset(const char *path, const char *cei
 		strncpy(buf, ceil, len);
 		buf[len] = '\0';
 
-		gitfo_posixify_path(buf);
-		if (gitfo_prettify_dir_path(buf2, sizeof(buf2), buf, NULL) < GIT_SUCCESS)
+		if (abspath(buf2, sizeof(buf2), buf) < GIT_SUCCESS)
 			continue;
 
 		len = strlen(buf2);
@@ -410,15 +409,22 @@ static int read_gitfile(char *path_out, size_t size, const char *file_path, cons
 
 	end_offset = strlen(data) - 1;
 
-	for (;data[end_offset] != '\r' && data[end_offset] != '\n'; --end_offset);
-	data[end_offset] = '\0';
+	for (;data[end_offset] == '\r' || data[end_offset] == '\n'; --end_offset);
+	data[end_offset + 1] = '\0';
 
-	if (GIT_FILE_CONTENT_PREFIX_LENGTH == end_offset) {
+	if (GIT_FILE_CONTENT_PREFIX_LENGTH == end_offset + 1) {
 		gitfo_free_buf(&file);
 		return git__throw(GIT_ENOTFOUND, "No path in git file `%s`", file_path);
 	}
 
 	error = gitfo_prettify_dir_path(path_out, size, data + GIT_FILE_CONTENT_PREFIX_LENGTH, base_path);
+	if (error == GIT_SUCCESS) {
+		end_offset = strlen(path_out);
+
+		if (end_offset > 0 && path_out[end_offset - 1] == '/')
+			path_out[end_offset - 1 ] = '\0';
+	}
+
 	gitfo_free_buf(&file);
 
 	return error;
@@ -521,12 +527,6 @@ int git_repository_discover(char *repository_path, size_t size, const char *star
 
 		git_repository__free_dirs(&repo);
 
-		//nothing has been found, lets try the parent directory
-		if (bare_path[ceiling_offset] == '\0') {
-			error = git__throw(GIT_ENOTAREPO,"Not a git repository (or any of the parent directories): %s", start_path);
-			goto cleanup;
-		}
-
 		if (git__dirname_r(normal_path, sizeof(normal_path), bare_path) < GIT_SUCCESS)
 			goto cleanup;
 
@@ -547,6 +547,13 @@ int git_repository_discover(char *repository_path, size_t size, const char *star
 
 		strcpy(bare_path, normal_path);
 		git__joinpath(normal_path, bare_path, DOT_GIT);
+
+		//nothing has been found, lets try the parent directory
+		if (bare_path[ceiling_offset] == '\0') {
+			error = git__throw(GIT_ENOTAREPO,"Not a git repository (or any of the parent directories): %s", start_path);
+			goto cleanup;
+		}
+
 	}
 
 	if (size < (strlen(found_path) + 1) * sizeof(char)) {
diff --git a/tests/resources/.gitignore b/tests/resources/.gitignore
new file mode 100644
index 0000000..43a19cc
--- /dev/null
+++ b/tests/resources/.gitignore
@@ -0,0 +1 @@
+discover.git
diff --git a/tests/t12-repo.c b/tests/t12-repo.c
index 35b41ca..d59095f 100644
--- a/tests/t12-repo.c
+++ b/tests/t12-repo.c
@@ -268,6 +268,142 @@ BEGIN_TEST(empty0, "test if a repository is empty or not")
 	git_repository_free(repo_empty);
 END_TEST
 
+#define DISCOVER_FOLDER TEST_RESOURCES "/discover.git"
+
+#define SUB_REPOSITORY_FOLDER_NAME "sub_repo"
+#define SUB_REPOSITORY_FOLDER DISCOVER_FOLDER "/" SUB_REPOSITORY_FOLDER_NAME
+#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"
+
+#define REPOSITORY_ALTERNATE_FOLDER DISCOVER_FOLDER "/alternate_sub_repo"
+#define REPOSITORY_ALTERNATE_FOLDER_SUB REPOSITORY_ALTERNATE_FOLDER "/sub"
+#define REPOSITORY_ALTERNATE_FOLDER_SUB_SUB REPOSITORY_ALTERNATE_FOLDER_SUB "/subsub"
+#define REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB REPOSITORY_ALTERNATE_FOLDER_SUB_SUB "/subsubsub"
+
+#define ALTERNATE_MALFORMED_FOLDER1 DISCOVER_FOLDER "/alternate_malformed_repo1"
+#define ALTERNATE_MALFORMED_FOLDER2 DISCOVER_FOLDER "/alternate_malformed_repo2"
+#define ALTERNATE_MALFORMED_FOLDER3 DISCOVER_FOLDER "/alternate_malformed_repo3"
+#define ALTERNATE_NOT_FOUND_FOLDER DISCOVER_FOLDER "/alternate_not_found_repo"
+
+static int ensure_repository_discover(const char *start_path, const char *ceiling_dirs, const char *expected_path)
+{
+	int error;
+	char found_path[GIT_PATH_MAX];
+
+	error = git_repository_discover(found_path, sizeof(found_path), start_path, 0, ceiling_dirs);
+	//across_fs is always 0 as we can't automate the filesystem change tests
+
+	if (error < GIT_SUCCESS)
+		return error;
+
+	return strcmp(found_path, expected_path) ? GIT_ERROR : GIT_SUCCESS;
+}
+
+static int write_file(const char *path, const char *content)
+{
+	int error;
+	git_file file;
+
+	if (gitfo_exists(path) == GIT_SUCCESS) {
+		error = gitfo_unlink(path);
+
+		if (error < GIT_SUCCESS)
+			return error;
+	}
+
+	file = gitfo_creat_force(path, 0644);
+	if (file < GIT_SUCCESS)
+		return file;
+
+	error = gitfo_write(file, (void*)content, strlen(content) * sizeof(char));
+
+	gitfo_close(file);
+
+	return error;
+}
+
+//no check is performed on ceiling_dirs length, so be sure it's long enough
+static int append_ceiling_dir(char *ceiling_dirs, const char *path)
+{
+	int len = strlen(ceiling_dirs);
+	int error;
+
+	error = gitfo_prettify_dir_path(ceiling_dirs + len + (len ? 1 : 0), GIT_PATH_MAX, path, NULL);
+	if (error < GIT_SUCCESS)
+		return git__rethrow(error, "Failed to append ceiling directory.");
+
+	if (len)
+		ceiling_dirs[len] = ':';
+
+	return GIT_SUCCESS;
+}
+
+BEGIN_TEST(discover0, "test discover")
+	git_repository *repo;
+	char ceiling_dirs[GIT_PATH_MAX * 2] = "";
+	char repository_path[GIT_PATH_MAX];
+	char sub_repository_path[GIT_PATH_MAX];
+	char found_path[GIT_PATH_MAX];
+	int mode = 0755;
+
+	rmdir_recurs(DISCOVER_FOLDER);
+	must_pass(append_ceiling_dir(ceiling_dirs,TEST_RESOURCES));
+	gitfo_mkdir_recurs(DISCOVER_FOLDER, mode);
+
+	must_be_true(git_repository_discover(repository_path, sizeof(repository_path), DISCOVER_FOLDER, 0, ceiling_dirs) == GIT_ENOTAREPO);
+
+	must_pass(git_repository_init(&repo, DISCOVER_FOLDER, 1));
+	must_pass(git_repository_discover(repository_path, sizeof(repository_path), DISCOVER_FOLDER, 0, ceiling_dirs));
+
+	must_pass(git_repository_init(&repo, SUB_REPOSITORY_FOLDER, 0));
+	must_pass(gitfo_mkdir_recurs(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, mode));
+	must_pass(git_repository_discover(sub_repository_path, sizeof(sub_repository_path), SUB_REPOSITORY_FOLDER, 0, ceiling_dirs));
+
+	must_pass(gitfo_mkdir_recurs(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, mode));
+	must_pass(ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, ceiling_dirs, sub_repository_path));
+
+	must_pass(gitfo_mkdir_recurs(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, mode));
+	must_pass(write_file(REPOSITORY_ALTERNATE_FOLDER "/" DOT_GIT, "gitdir: ../" SUB_REPOSITORY_FOLDER_NAME "/" DOT_GIT));
+	must_pass(write_file(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB "/" DOT_GIT, "gitdir: ../../../" SUB_REPOSITORY_FOLDER_NAME "/" DOT_GIT));
+	must_pass(write_file(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB "/" DOT_GIT, "gitdir: ../../../../"));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs, repository_path));
+
+	must_pass(gitfo_mkdir_recurs(ALTERNATE_MALFORMED_FOLDER1, mode));
+	must_pass(write_file(ALTERNATE_MALFORMED_FOLDER1 "/" DOT_GIT, "Anything but not gitdir:"));
+	must_pass(gitfo_mkdir_recurs(ALTERNATE_MALFORMED_FOLDER2, mode));
+	must_pass(write_file(ALTERNATE_MALFORMED_FOLDER2 "/" DOT_GIT, "gitdir:"));
+	must_pass(gitfo_mkdir_recurs(ALTERNATE_MALFORMED_FOLDER3, mode));
+	must_pass(write_file(ALTERNATE_MALFORMED_FOLDER3 "/" DOT_GIT, "gitdir: \n\n\n"));
+	must_pass(gitfo_mkdir_recurs(ALTERNATE_NOT_FOUND_FOLDER, mode));
+	must_pass(write_file(ALTERNATE_NOT_FOUND_FOLDER "/" DOT_GIT, "gitdir: a_repository_that_surely_does_not_exist"));
+	must_fail(git_repository_discover(found_path, sizeof(found_path), ALTERNATE_MALFORMED_FOLDER1, 0, ceiling_dirs));
+	must_fail(git_repository_discover(found_path, sizeof(found_path), ALTERNATE_MALFORMED_FOLDER2, 0, ceiling_dirs));
+	must_fail(git_repository_discover(found_path, sizeof(found_path), ALTERNATE_MALFORMED_FOLDER3, 0, ceiling_dirs));
+	must_be_true(git_repository_discover(found_path, sizeof(found_path), ALTERNATE_NOT_FOUND_FOLDER, 0, ceiling_dirs) == GIT_ENOTAREPO);
+
+	must_pass(append_ceiling_dir(ceiling_dirs, SUB_REPOSITORY_FOLDER));
+	//this must pass as ceiling_directories cannot predent the current
+	//working directory to be checked
+	must_pass(git_repository_discover(found_path, sizeof(found_path), SUB_REPOSITORY_FOLDER, 0, ceiling_dirs));
+	must_be_true(git_repository_discover(found_path, sizeof(found_path), SUB_REPOSITORY_FOLDER_SUB, 0, ceiling_dirs) == GIT_ENOTAREPO);
+	must_be_true(git_repository_discover(found_path, sizeof(found_path), SUB_REPOSITORY_FOLDER_SUB_SUB, 0, ceiling_dirs) == GIT_ENOTAREPO);
+	must_be_true(git_repository_discover(found_path, sizeof(found_path), SUB_REPOSITORY_FOLDER_SUB_SUB_SUB, 0, ceiling_dirs) == GIT_ENOTAREPO);
+
+	//.gitfile redirection should not be affected by ceiling directories
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB, ceiling_dirs, sub_repository_path));
+	must_pass(ensure_repository_discover(REPOSITORY_ALTERNATE_FOLDER_SUB_SUB_SUB, ceiling_dirs, repository_path));
+
+	rmdir_recurs(DISCOVER_FOLDER);
+END_TEST
+
 BEGIN_SUITE(repository)
 	ADD_TEST(odb0);
 	ADD_TEST(odb1);
@@ -278,5 +414,6 @@ BEGIN_SUITE(repository)
 	ADD_TEST(open1);
 	ADD_TEST(open2);
 	ADD_TEST(empty0);
+	ADD_TEST(discover0);
 END_SUITE