Use git_{object,tree}_owner (#228)

Note that libgit2's git_commit_owner is missing from the public
interface, so we cannot use it.

src/commit.c

@@ -31,6 +31,7 @@
 #include "utils.h"
 #include "signature.h"
 #include "commit.h"
+#include "object.h"
 
 extern PyTypeObject TreeType;
 
@@ -149,32 +150,43 @@ Commit_tree__get__(Commit *commit)
 PyDoc_STRVAR(Commit_parents__doc__, "The list of parent commits.");
 
 PyObject *
-Commit_parents__get__(Commit *commit)
+Commit_parents__get__(Commit *self)
 {
+    git_repository *repo;
     unsigned int i, parent_count;
     const git_oid *parent_oid;
-    PyObject *obj;
+    git_commit *parent;
+    int err;
+    PyObject *py_parent;
     PyObject *list;
 
-    parent_count = git_commit_parentcount(commit->commit);
+    parent_count = git_commit_parentcount(self->commit);
     list = PyList_New(parent_count);
     if (!list)
         return NULL;
 
+    repo = git_object_owner((git_object*)self->commit);
     for (i=0; i < parent_count; i++) {
-        parent_oid = git_commit_parent_id(commit->commit, i);
+        parent_oid = git_commit_parent_id(self->commit, i);
         if (parent_oid == NULL) {
             Py_DECREF(list);
             Error_set(GIT_ENOTFOUND);
             return NULL;
         }
-        obj = lookup_object(commit->repo, parent_oid, GIT_OBJ_COMMIT);
-        if (obj == NULL) {
+
+        err = git_commit_lookup(&parent, repo, parent_oid);
+        if (err < 0) {
+            Py_DECREF(list);
+            return Error_set_oid(err, parent_oid, GIT_OID_HEXSZ);
+        }
+
+        py_parent = wrap_object((git_object*)parent, self->repo);
+        if (py_parent == NULL) {
             Py_DECREF(list);
             return NULL;
         }
 
-        PyList_SET_ITEM(list, i, obj);
+        PyList_SET_ITEM(list, i, py_parent);
     }
 
     return list;

src/object.c

@@ -96,14 +96,15 @@ PyDoc_STRVAR(Object_read_raw__doc__,
 PyObject *
 Object_read_raw(Object *self)
 {
+    git_repository *repo;
     const git_oid *oid;
     git_odb_object *obj;
     PyObject *aux;
 
+    repo = git_object_owner(self->obj);
     oid = git_object_id(self->obj);
-    assert(oid);
 
-    obj = Repository_read_raw(self->repo->repo, oid, GIT_OID_HEXSZ);
+    obj = Repository_read_raw(repo, oid, GIT_OID_HEXSZ);
     if (obj == NULL)
         return NULL;
 

src/repository.c

@@ -65,20 +65,6 @@ int_to_loose_object_type(int type_id)
     }
 }
 
-PyObject *
-lookup_object(Repository *repo, const git_oid *oid, git_otype type)
-{
-    int err;
-    git_object *obj;
-
-    err = git_object_lookup_prefix(&obj, repo->repo, oid, GIT_OID_HEXSZ,
-                                   type);
-    if (err < 0)
-        return Error_set_oid(err, oid, GIT_OID_HEXSZ);
-
-    return wrap_object(obj, repo);
-}
-
 int
 Repository_init(Repository *self, PyObject *args, PyObject *kwds)
 {

src/tree.c

@@ -303,7 +303,7 @@ Tree_diff(Tree *self, PyObject *args, PyObject *kwds)
                                      &py_obj, &opts.flags, &empty_tree))
         return NULL;
 
-    repo = self->repo->repo;
+    repo = git_tree_owner(self->tree);
     if (py_obj == NULL) {
         if (empty_tree > 0)
             err = git_diff_tree_to_tree(&diff, repo, self->tree, NULL, &opts);

src/types.h

@@ -193,6 +193,4 @@ typedef struct {
 SIMPLE_TYPE(Remote, git_remote, remote)
 
 
-PyObject* lookup_object(Repository *repo, const git_oid *oid, git_otype type);
-
 #endif