Add support for Python 3.8 and Upgrade Cython (#594)

Fixes: #546

Had to include harfbuzz manually as newer Pango change this.
See:
    eiskaltdcpp/eiskaltdcpp#413
    https://gitlab.gnome.org/GNOME/pango/-/issues/387

Also had to add `-Wno-deprecated-declarations` to get this to compile because
of the following errors that didn't seem to be coming from this code directly:

    warning: ‘GTimeVal’ is deprecated: Use 'GDateTime' instead
    warning: ‘GTypeDebugFlags’ is deprecated

Author: gmjosack

README.md

@@ -210,9 +210,9 @@ support old operating systems then choose the v31 release.
 
 OS | Py2 | Py3 | 32bit | 64bit | Requirements
 --- | --- | --- | --- | --- | ---
-Windows | 2.7 | 3.4 / 3.5 / 3.6 / 3.7 | Yes | Yes | Windows 7+
-Linux | 2.7 | 3.4 / 3.5 / 3.6 / 3.7 | Yes | Yes | Debian 8+, Ubuntu 14.04+,<br> Fedora 24+, openSUSE 13.3+
-Mac | 2.7 | 3.4 / 3.5 / 3.6 / 3.7 | No | Yes | MacOS 10.9+
+Windows | 2.7 | 3.4 / 3.5 / 3.6 / 3.7 / 3.8 | Yes | Yes | Windows 7+
+Linux | 2.7 | 3.4 / 3.5 / 3.6 / 3.7  3.8 | Yes | Yes | Debian 8+, Ubuntu 14.04+,<br> Fedora 24+, openSUSE 13.3+
+Mac | 2.7 | 3.4 / 3.5 / 3.6 / 3.7 / 3.8 | No | Yes | MacOS 10.9+
 
 These platforms are not supported yet:
 - ARM - see [Issue #267](../../issues/267)

src/common/cefpython_public_api.h

@@ -46,6 +46,8 @@
 #include "../../build/build_cefpython/cefpython_py36_fixed.h"
 #elif PY_MINOR_VERSION == 7
 #include "../../build/build_cefpython/cefpython_py37_fixed.h"
+#elif PY_MINOR_VERSION == 8
+#include "../../build/build_cefpython/cefpython_py38_fixed.h"
 #endif // PY_MINOR_VERSION
 #endif // PY_MAJOR_VERSION
 

tools/build.py

@@ -293,7 +293,7 @@ def setup_environ():
         print("[build.py] PYTHON_INCLUDE: {python_include}"
               .format(python_include=os.environ["PYTHON_INCLUDE"]))
 
-        os.environ["CEF_CCFLAGS"] = "-std=gnu++11 -DNDEBUG -Wall -Werror"
+        os.environ["CEF_CCFLAGS"] = "-std=gnu++11 -DNDEBUG -Wall -Werror -Wno-deprecated-declarations"
         if FAST_FLAG:
             os.environ["CEF_CCFLAGS"] += " -O0"
         else:

tools/build_distrib.py

@@ -80,7 +80,7 @@
 ALLOW_PARTIAL = False
 
 # Python versions
-SUPPORTED_PYTHON_VERSIONS = [(2, 7), (3, 4), (3, 5), (3, 6), (3, 7)]
+SUPPORTED_PYTHON_VERSIONS = [(2, 7), (3, 4), (3, 5), (3, 6), (3, 7), (3, 8)]
 
 # Python search paths. It will use first Python found for specific version.
 # Supports replacement of one environment variable in path eg.: %ENV_KEY%.

tools/common.py

@@ -473,6 +473,8 @@ def get_msvs_for_python(vs_prefix=False):
         return "VS2015" if vs_prefix else "2015"
     elif sys.version_info[:2] == (3, 7):
         return "VS2015" if vs_prefix else "2015"
+    elif sys.version_info[:2] == (3, 8):
+        return "VS2015" if vs_prefix else "2015"
     else:
         print("ERROR: This version of Python is not supported")
         sys.exit(1)

tools/installer/cefpython3.__init__.py

@@ -64,5 +64,8 @@
 elif sys.version_info[:2] == (3, 7):
     # noinspection PyUnresolvedReferences
     from . import cefpython_py37 as cefpython
+elif sys.version_info[:2] == (3, 8):
+    # noinspection PyUnresolvedReferences
+    from . import cefpython_py38 as cefpython
 else:
     raise Exception("Python version not supported: " + sys.version)

tools/installer/cefpython3.setup.py

@@ -148,6 +148,7 @@ def main():
             "Programming Language :: Python :: 3.5",
             "Programming Language :: Python :: 3.6",
             "Programming Language :: Python :: 3.7",
+            "Programming Language :: Python :: 3.8",
             "Topic :: Desktop Environment",
             "Topic :: Internet",
             "Topic :: Internet :: WWW/HTTP",

tools/requirements.txt

@@ -1,4 +1,4 @@
-Cython == 0.28.4
+Cython == 0.29.21
 docopt >= 0.6.2
 setuptools
 wheel