Fixes for capnp 1.0 (#1)

* add capnp_api.h to gitignore

* Change type of read_min_bytes from size to int

Not sure why this was not causing issues before or if that
is the right fix ... but it seems to be fine :)

* Adapt python_requires to >=3.8

This was overlooked when 3.7 was deprecated. The ci no longer
works with python 3.7 and cibuildwheel uses python_requires ...

* Replace deprecated find_module with find_spec (importlib)

find_module was deprecated with python 3.4 and python 3.12
removed it (https://docs.python.org/3.12/whatsnew/3.12.html#importlib).

The new command is find_spec and only required a few adaptions

.gitignore

@@ -46,6 +46,7 @@ docs/_build
 
 capnp/lib/capnp.cpp
 capnp/lib/capnp.h
+capnp/lib/capnp_api.h
 bundled/
 example
 *.iml

CHANGELOG.md

@@ -1,6 +1,6 @@
 ## v2.0.0b1 (2023-10-03)
 - Update to bundled capnproto-1.0.1
-- Remove explicit support for Python 3.7 (though wheels are still built for now)
+- Remove support for Python 3.7
 - Use custom build backend to support build args (#328)
 - Update Cython version and Python to 3.12 (#320)
 - Wrap all capnp code in a context-manager to avoid segfaults (#317)

capnp/lib/capnp.pyx

@@ -42,6 +42,7 @@ from types import ModuleType as _ModuleType
 from operator import attrgetter as _attrgetter
 from functools import partial as _partial
 from contextlib import asynccontextmanager as _asynccontextmanager
+from importlib.machinery import ModuleSpec
 
 _CAPNP_VERSION_MAJOR = capnp.CAPNP_VERSION_MAJOR
 _CAPNP_VERSION_MINOR = capnp.CAPNP_VERSION_MINOR
@@ -2423,7 +2424,7 @@ cdef class _PyAsyncIoStreamProtocol(DummyBaseClass, asyncio.BufferedProtocol):
 
     # State for reading data from the transport
     cdef char* read_buffer
-    cdef size_t read_min_bytes
+    cdef int32_t read_min_bytes
     cdef size_t read_max_bytes
     cdef size_t read_already_read
     cdef PromiseFulfiller[size_t]* read_fulfiller
@@ -4322,7 +4323,7 @@ class _Importer:
         self.extension = '.capnp'
         self.additional_paths = additional_paths
 
-    def find_module(self, fullname, package_path=None):
+    def find_spec(self, fullname, package_path, target=None):
         if fullname in _sys.modules: # Don't allow re-imports
             return None
 
@@ -4363,12 +4364,12 @@ class _Importer:
                 path = abspath(path)
 
             if is_file(path+sep+capnp_module_name):
-                return _Loader(fullname, join_path(path, capnp_module_name), self.additional_paths)
+                return ModuleSpec(fullname, _Loader(fullname, join_path(path, capnp_module_name), self.additional_paths))
             if has_underscores:
                 if is_file(path+sep+capnp_module_name_dashes):
-                    return _Loader(fullname, join_path(path, capnp_module_name_dashes), self.additional_paths)
+                    return ModuleSpec(fullname, _Loader(fullname, join_path(path, capnp_module_name_dashes), self.additional_paths))
                 if is_file(path+sep+capnp_module_name_spaces):
-                    return _Loader(fullname, join_path(path, capnp_module_name_spaces), self.additional_paths)
+                    return ModuleSpec(fullname, _Loader(fullname, join_path(path, capnp_module_name_spaces), self.additional_paths))
 
 
 _importer = None

setup.py

@@ -210,7 +210,7 @@ extensions = [
 ]
 
 setup(
-    python_requires=">=3.7",
+    python_requires=">=3.8",
     name="pycapnp",
     packages=["capnp"],
     version=VERSION,

test/test_load.py

@@ -144,6 +144,7 @@ async def test_load_capnp(foo):
     baz_.text = "test"
     baz_.qux.id = 2
 
-    wrapper = foo.Wrapper._new_client(Wrapper())
+    async with capnp.kj_loop():
-    remote = wrapper.wrapped(baz_)
+        wrapper = foo.Wrapper._new_client(Wrapper())
-    await remote
+        remote = wrapper.wrapped(baz_)
+        await remote