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, 68 insertions, 0 deletions

diff --git a/tests-clay/repo/getters.c b/tests-clay/repo/getters.c
new file mode 100644
index 000000000..3acdb7566
--- /dev/null
+++ b/tests-clay/repo/getters.c
@@ -0,0 +1,68 @@
+#include "clay_libgit2.h"
+
+void test_repo_getters__initialize(void)
+{
+	cl_fixture_sandbox("testrepo.git");
+}
+
+void test_repo_getters__cleanup(void)
+{
+	cl_fixture_cleanup("testrepo.git");
+}
+
+void test_repo_getters__empty(void)
+{
+	git_repository *repo_empty, *repo_normal;
+
+	cl_git_pass(git_repository_open(&repo_normal, cl_fixture("testrepo.git")));
+	cl_assert(git_repository_is_empty(repo_normal) == 0);
+	git_repository_free(repo_normal);
+
+	cl_git_pass(git_repository_open(&repo_empty, cl_fixture("empty_bare.git")));
+	cl_assert(git_repository_is_empty(repo_empty) == 1);
+	git_repository_free(repo_empty);
+}
+
+void test_repo_getters__head_detached(void)
+{
+	git_repository *repo;
+	git_reference *ref;
+	git_oid oid;
+
+	cl_git_pass(git_repository_open(&repo, "testrepo.git"));
+
+	cl_assert(git_repository_head_detached(repo) == 0);
+
+	/* detach the HEAD */
+	git_oid_fromstr(&oid, "c47800c7266a2be04c571c04d5a6614691ea99bd");
+	cl_git_pass(git_reference_create_oid(&ref, repo, "HEAD", &oid, 1));
+	cl_assert(git_repository_head_detached(repo) == 1);
+
+	/* take the reop back to it's original state */
+	cl_git_pass(git_reference_create_symbolic(&ref, repo, "HEAD", "refs/heads/master", 1));
+	cl_assert(git_repository_head_detached(repo) == 0);
+
+	git_reference_free(ref);
+	git_repository_free(repo);
+}
+
+void test_repo_getters__head_orphan(void)
+{
+	git_repository *repo;
+	git_reference *ref;
+
+	cl_git_pass(git_repository_open(&repo, "testrepo.git"));
+
+	cl_assert(git_repository_head_orphan(repo) == 0);
+
+	/* orphan HEAD */
+	cl_git_pass(git_reference_create_symbolic(&ref, repo, "HEAD", "refs/heads/orphan", 1));
+	cl_assert(git_repository_head_orphan(repo) == 1);
+
+	/* take the reop back to it's original state */
+	cl_git_pass(git_reference_create_symbolic(&ref, repo, "HEAD", "refs/heads/master", 1));
+	cl_assert(git_repository_head_orphan(repo) == 0);
+
+	git_reference_free(ref);
+	git_repository_free(repo);
+}