Bring back Wuffs submodule (primary repo)

Otherwise it's barely possible to make both CMake
and setuptools work without installing tons of deps
to the environment

.gitignore

@@ -7,4 +7,3 @@ build/
 _build/
 pywuffs.egg-info/
 __pycache__/
-src/wuffs-unsupported-snapshot.c

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "libs/wuffs"]
+	path = libs/wuffs
+	url = https://github.com/google/wuffs.git

CMakeLists.txt

@@ -18,11 +18,7 @@ elseif(MSVC)
   set(CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS} "/arch:AVX")
 endif()
 
-file(
-  DOWNLOAD
-  https://raw.githubusercontent.com/google/wuffs/13c72db3508d33b9416a22a0ab8a8d4d8d5cd7be/release/c/wuffs-unsupported-snapshot.c
-  ${CMAKE_SOURCE_DIR}/src/wuffs-unsupported-snapshot.c)
-
 find_package(pybind11 REQUIRED)
 
 pybind11_add_module(pywuffs src/wuffs-bindings.cpp)
+target_include_directories(pywuffs PRIVATE libs/wuffs/release/c/)

MANIFEST.in

@@ -1,2 +1,2 @@
-include src/wuffs-aux-image-wrapper.h src/wuffs-aux-json-wrapper.h src/wuffs-unsupported-snapshot.c
+include src/wuffs-aux-image-wrapper.h src/wuffs-aux-json-wrapper.h libs/wuffs/release/c/wuffs-unsupported-snapshot.c
 

README.md

@@ -11,7 +11,7 @@ the [Auxiliary C++ API](https://github.com/google/wuffs/blob/main/doc/note/auxil
 interest since it provides for "ridiculously fast" decoding of images of some types.
 
 Current version of Wuffs library used in this project is **unsupported snapshot** taken from
-[this](https://github.com/google/wuffs/commit/13c72db3508d33b9416a22a0ab8a8d4d8d5cd7be) commit. The primary
+[this](https://github.com/google/wuffs/tree/13c72db3508d33b9416a22a0ab8a8d4d8d5cd7be) commit. The primary
 rationale for using the snapshot version instead of a stable release is that it provides JPEG decoder.
 
 ## Installation

setup.py

@@ -32,7 +32,8 @@ def build_extensions(self):
 ext_modules = [
     Pybind11Extension(
         "pywuffs",
-        ["src/wuffs-bindings.cpp"]
+        ["src/wuffs-bindings.cpp"],
+        include_dirs=["libs/wuffs/release/c"]
     ),
 ]
 

src/wuffs-aux-image-wrapper.h

@@ -7,7 +7,7 @@
 #include <utility>
 #include <vector>
 
-#include "wuffs-unsupported-snapshot.c"
+#include <wuffs-unsupported-snapshot.c>
 
 // This API wraps the wuffs_aux API for image decoding. The wrapper is needed
 // since the wuffs_aux API uses the callback-based approach which doesn't play

src/wuffs-aux-json-wrapper.h

@@ -7,7 +7,7 @@
 #include <utility>
 #include <vector>
 
-#include "wuffs-unsupported-snapshot.c"
+#include <wuffs-unsupported-snapshot.c>
 
 // This API wraps the wuffs_aux API for JSON decoding. The wrapper is needed
 // since the wuffs_aux API uses the callback-based approach which doesn't play

src/wuffs-bindings.cpp

@@ -3,7 +3,7 @@
 #include <pybind11/pybind11.h>
 #include <pybind11/stl.h>
 
-#include "wuffs-unsupported-snapshot.c"
+#include <wuffs-unsupported-snapshot.c>
 
 #include "wuffs-aux-image-wrapper.h"
 #include "wuffs-aux-json-wrapper.h"