repository: Change ownership semantics

The ownership semantics have been changed all over the library to be
consistent. There are no more "borrowed" or duplicated references.

Main changes:

	- `git_repository_open2` and `3` have been dropped.

	- Added setters and getters to hotswap all the repository owned
	objects:

		`git_repository_index`
		`git_repository_set_index`
		`git_repository_odb`
		`git_repository_set_odb`
		`git_repository_config`
		`git_repository_set_config`
		`git_repository_workdir`
		`git_repository_set_workdir`

	Now working directories/index files/ODBs and so on can be
	hot-swapped after creating a repository and between operations.

	- All these objects now have proper ownership semantics with
	refcounting: they all require freeing after they are no longer
	needed (the repository always keeps its internal reference).

	- Repository open and initialization has been updated to keep in
	mind the configuration files. Bare repositories are now always
	detected, and a default config file is created on init.

	- All the tests affected by these changes have been dropped from the
	old test suite and ported to the new one.

1 files changed, 8 insertions, 4 deletions

diff --git a/src/repository.h b/src/repository.h
index 0c17958fd..c3a9a5c60 100644
--- a/src/repository.h
+++ b/src/repository.h
@@ -32,15 +32,15 @@ struct git_object {
 };
 
 struct git_repository {
-	git_odb *db;
+	git_odb *_odb;
+	git_config *_config;
+	git_index *_index;
 
 	git_cache objects;
 	git_refcache references;
 
 	char *path_repository;
-	char *path_index;
-	char *path_odb;
-	char *path_workdir;
+	char *workdir;
 
 	unsigned is_bare:1;
 	unsigned int lru_counter;
@@ -53,4 +53,8 @@ void git_object__free(void *object);
 int git_oid__parse(git_oid *oid, const char **buffer_out, const char *buffer_end, const char *header);
 void git_oid__writebuf(git_buf *buf, const char *header, const git_oid *oid);
 
+int git_repository_config__weakptr(git_config **out, git_repository *repo);
+int git_repository_odb__weakptr(git_odb **out, git_repository *repo);
+int git_repository_index__weakptr(git_index **out, git_repository *repo);
+
 #endif