Add Repository pointer to Reference.

As asked in #221.

src/reference.c

@@ -107,6 +107,7 @@ PyTypeObject RefLogIterType = {
 void
 Reference_dealloc(Reference *self)
 {
+    Py_CLEAR(self->repo);
     git_reference_free(self->reference);
     PyObject_Del(self);
 }
@@ -191,7 +192,7 @@ Reference_resolve(Reference *self, PyObject *args)
     if (err < 0)
         return Error_set(err);
 
-    return wrap_reference(c_reference);
+    return wrap_reference(c_reference, self->repo);
 }
 
 
@@ -461,13 +462,18 @@ PyTypeObject ReferenceType = {
 
 
 PyObject *
-wrap_reference(git_reference * c_reference)
+wrap_reference(git_reference * c_reference, Repository *repo)
 {
     Reference *py_reference=NULL;
 
     py_reference = PyObject_New(Reference, &ReferenceType);
-    if (py_reference)
+    if (py_reference) {
         py_reference->reference = c_reference;
+        if (repo) {
+            py_reference->repo = repo;
+            Py_INCREF(repo);
+        }
+    }
 
     return (PyObject *)py_reference;
 }

src/reference.h

@@ -41,6 +41,6 @@ PyObject* Reference_get_name(Reference *self);
 PyObject* Reference_get_oid(Reference *self);
 PyObject* Reference_get_hex(Reference *self);
 PyObject* Reference_get_type(Reference *self);
-PyObject* wrap_reference(git_reference * c_reference);
+PyObject* wrap_reference(git_reference *c_reference, Repository *repo);
 
 #endif

src/repository.c

@@ -168,7 +168,7 @@ Repository_head__get__(Repository *self)
         return NULL;
     }
 
-    return wrap_reference(head);
+    return wrap_reference(head, self);
 }
 
 int
@@ -859,7 +859,7 @@ Repository_lookup_reference(Repository *self, PyObject *py_name)
     free(c_name);
 
     /* 3- Make an instance of Reference and return it */
-    return wrap_reference(c_reference);
+    return wrap_reference(c_reference, self);
 }
 
 PyDoc_STRVAR(Repository_create_reference_direct__doc__,
@@ -898,7 +898,7 @@ Repository_create_reference_direct(Repository *self,  PyObject *args,
     if (err < 0)
         return Error_set(err);
 
-    return wrap_reference(c_reference);
+    return wrap_reference(c_reference, self);
 }
 
 PyDoc_STRVAR(Repository_create_reference_symbolic__doc__,
@@ -932,7 +932,7 @@ Repository_create_reference_symbolic(Repository *self,  PyObject *args,
     if (err < 0)
         return Error_set(err);
 
-    return wrap_reference(c_reference);
+    return wrap_reference(c_reference, self);
 }
 
 

src/types.h

@@ -159,10 +159,7 @@ typedef struct {
 /* git_reference, git_reflog */
 SIMPLE_TYPE(Walker, git_revwalk, walk)
 
-typedef struct {
+SIMPLE_TYPE(Reference, git_reference, reference)
-    PyObject_HEAD
-    git_reference *reference;
-} Reference;
 
 typedef struct {
     PyObject_HEAD