Add FilterList.__len__

Author: jorio

pygit2/_run.py

@@ -97,6 +97,7 @@
 C_PREAMBLE = """\
 #include <git2.h>
 #include <git2/sys/repository.h>
+#include <git2/sys/filter.h>
 """
 
 # ffi

pygit2/decl/filter.h

@@ -23,4 +23,7 @@ int git_filter_list_contains(
 	git_filter_list *filters,
 	const char *name);
 
+size_t git_filter_list_length(
+	const git_filter_list *fl);
+
 void git_filter_list_free(git_filter_list *filters);

pygit2/filter.py

@@ -133,5 +133,8 @@ def __contains__(self, name: str) -> bool:
         result = C.git_filter_list_contains(self._pointer, c_name)
         return bool(result)
 
+    def __len__(self) -> int:
+        return C.git_filter_list_length(self._pointer)
+
     def __del__(self):
         C.git_filter_list_free(self._pointer)

test/test_filter.py

@@ -148,6 +148,7 @@ def test_filterlist_crlf(testrepo: Repository) -> None:
 
     fl = testrepo.load_filter_list('hello.txt')
     assert fl is not None
+    assert len(fl) == 1
     assert 'crlf' in fl
 
     with pytest.raises(TypeError):