refactor: Use apigen to generate cython.

.gitignore

@@ -8,3 +8,5 @@
 *.o
 *.tox
 .mypy_cache
+# TODO(iphydf): Remove once .gen is removed from the name.
+*.gen.pyx

BUILD.bazel

@@ -3,25 +3,42 @@ load("//tools/project:build_defs.bzl", "project")
 
 project(license = "gpl3-https")
 
-genrule(
-    name = "pytox/core",
-    srcs = [
-        "pytox/src/core.pyx",
-        "//c-toxcore:tox/tox.h",
-    ],
-    outs = ["pytox/core.pyx"],
-    cmd = "$(location //py_toxcore_c/tools:gen_api) $(location pytox/src/core.pyx) $(location //c-toxcore:tox/tox.h) > $@",
-    tools = ["//py_toxcore_c/tools:gen_api"],
-)
+#genrule(
+#    name = "pytox/core",
+#    srcs = [
+#        "pytox/src/core.pyx",
+#        "//c-toxcore:tox/tox.h",
+#    ],
+#    outs = ["pytox/core.pyx"],
+#    cmd = "$(location //py_toxcore_c/tools:gen_api) $(location pytox/src/core.pyx) $(location //c-toxcore:tox/tox.h) > $@",
+#    tools = ["//py_toxcore_c/tools:gen_api"],
+#)
 
 pyx_library(
     name = "pytox",
-    srcs = [
-        "pytox/av.pyx",
-        "pytox/core.pyx",
-    ],
+    srcs = glob(
+        [
+            "pytox/**/*.pxd",
+            "pytox/**/*.pyx",
+            "pytox/**/*.py",
+        ],
+        # TODO(iphydf): Remove.
+        exclude = ["**/*.gen.pyx"],
+    ),
     cdeps = ["//c-toxcore"],
-    cython_directives = {"language_level": "3"},
+    cython_directives = {
+        "embedsignature": "True",
+        "embedsignature.format": "python",
+        "language_level": "3",
+    },
     tags = ["no-cross"],
     visibility = ["//visibility:public"],
 )
+
+genrule(
+    name = "pytox_stubs",
+    outs = [mod[:-4] + ".pyi" for mod in glob(["pytox/**/*.pyx"])],
+    cmd = "$(location //py_toxcore_c/tools:stubgen) -o $(GENDIR)/py_toxcore_c" + " ".join([" -m %s" % mod[:-4].replace("/", ".") for mod in glob(["pytox/**/*.pyx"])]),
+    tags = ["manual"],
+    tools = ["//py_toxcore_c/tools:stubgen"],
+)

Dockerfile

@@ -30,15 +30,12 @@ RUN git clone --depth=1 --recursive https://github.com/TokTok/c-toxcore /build/c
  && ldconfig
 
 COPY pytox /build/pytox
-COPY tools /build/tools
 
-RUN mypy --strict tools/gen_api.py \
- && tools/gen_api.py pytox/src/core.pyx /usr/local/include/tox/tox.h > pytox/core.pyx \
- && cython pytox/av.pyx pytox/core.pyx
+RUN cython -I. $(find pytox -name "*.pyx")
 
 COPY setup.py /build/
 RUN python3 setup.py install \
- && python3 -c 'from pytox import core; print(core.__doc__)'
+ && python3 -c 'import pytox.toxcore.tox as core; print(core.__doc__)'
 
 COPY test /build/test
-RUN python3 test/core_test.py
+RUN python3 test/tox_test.py

pytox/common.py

@@ -0,0 +1,34 @@
+from enum import Enum
+from typing import Sized
+from typing import TypeVar
+
+T = TypeVar("T", bytes, str, Sized)
+
+
+class PytoxException(Exception):
+    pass
+
+
+class ApiException(PytoxException):
+    def __init__(self, err: Enum):
+        super().__init__(err.name)
+        self.error = err
+
+
+class LengthException(PytoxException):
+    pass
+
+
+class UseAfterFreeException(Exception):
+    def __init__(self):
+        super().__init__(
+            "object used after it was killed/freed (or it was never initialised)"
+        )
+
+
+def _check_len(name: str, data: T, expected_length: int) -> T:
+    if len(data) < expected_length:
+        raise LengthException(
+            f"parameter '{name}' received bytes of invalid"
+            f"length {len(data)}, expected at least {expected_length}")
+    return data