add python 3.9

kokoro/linux/dockerfile/test/python39/Dockerfile

@@ -0,0 +1,31 @@
+FROM python:3.9-buster
+
+# Install dependencies.  We start with the basic ones require to build protoc
+# and the C++ build
+RUN apt-get update && apt-get install -y \
+  autoconf \
+  autotools-dev \
+  build-essential \
+  bzip2 \
+  ccache \
+  curl \
+  gcc \
+  git \
+  libc6 \
+  libc6-dbg \
+  libc6-dev \
+  libgtest-dev \
+  libtool \
+  make \
+  parallel \
+  time \
+  wget \
+  && apt-get clean \
+  && rm -rf /var/lib/apt/lists/*
+
+# Install Python libraries.
+RUN python -m pip install --no-cache-dir --upgrade \
+  pip \
+  setuptools \
+  tox \
+  wheel

kokoro/linux/python39/build.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+#
+# This is the top-level script we give to Kokoro as the entry point for
+# running the "pull request" project:
+#
+# This script selects a specific Dockerfile (for building a Docker image) and
+# a script to run inside that image.  Then we delegate to the general
+# build_and_run_docker.sh script.
+
+# Change to repo root
+cd $(dirname $0)/../../..
+
+export DOCKERHUB_ORGANIZATION=protobuftesting
+export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python39
+export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
+export OUTPUT_DIR=testoutput
+export TEST_SET="python39"
+./kokoro/linux/build_and_run_docker.sh

kokoro/linux/python39/continuous.cfg

@@ -0,0 +1,11 @@
+# Config file for running tests in Kokoro
+
+# Location of the build script in repository
+build_file: "protobuf/kokoro/linux/python39/build.sh"
+timeout_mins: 120
+
+action {
+  define_artifacts {
+    regex: "**/sponge_log.xml"
+  }
+}

kokoro/linux/python39/presubmit.cfg

@@ -0,0 +1,11 @@
+# Config file for running tests in Kokoro
+
+# Location of the build script in repository
+build_file: "protobuf/kokoro/linux/python39/build.sh"
+timeout_mins: 120
+
+action {
+  define_artifacts {
+    regex: "**/sponge_log.xml"
+  }
+}

kokoro/linux/python39_cpp/build.sh

@@ -0,0 +1,18 @@
+#!/bin/bash
+#
+# This is the top-level script we give to Kokoro as the entry point for
+# running the "pull request" project:
+#
+# This script selects a specific Dockerfile (for building a Docker image) and
+# a script to run inside that image.  Then we delegate to the general
+# build_and_run_docker.sh script.
+
+# Change to repo root
+cd $(dirname $0)/../../..
+
+export DOCKERHUB_ORGANIZATION=protobuftesting
+export DOCKERFILE_DIR=kokoro/linux/dockerfile/test/python39
+export DOCKER_RUN_SCRIPT=kokoro/linux/pull_request_in_docker.sh
+export OUTPUT_DIR=testoutput
+export TEST_SET="python39_cpp"
+./kokoro/linux/build_and_run_docker.sh

kokoro/linux/python39_cpp/continuous.cfg

@@ -0,0 +1,11 @@
+# Config file for running tests in Kokoro
+
+# Location of the build script in repository
+build_file: "protobuf/kokoro/linux/python39_cpp/build.sh"
+timeout_mins: 120
+
+action {
+  define_artifacts {
+    regex: "**/sponge_log.xml"
+  }
+}

kokoro/linux/python39_cpp/presubmit.cfg

@@ -0,0 +1,11 @@
+# Config file for running tests in Kokoro
+
+# Location of the build script in repository
+build_file: "protobuf/kokoro/linux/python39_cpp/build.sh"
+timeout_mins: 120
+
+action {
+  define_artifacts {
+    regex: "**/sponge_log.xml"
+  }
+}

kokoro/release/python/linux/build_artifacts.sh

@@ -54,3 +54,4 @@ build_artifact_version 3.5
 build_artifact_version 3.6
 build_artifact_version 3.7
 build_artifact_version 3.8
+build_artifact_version 3.9

kokoro/release/python/macos/build_artifacts.sh

@@ -55,6 +55,7 @@ build_artifact_version 2.7
 build_artifact_version 3.6
 build_artifact_version 3.7
 build_artifact_version 3.8
+build_artifact_version 3.9
 
 # python OSX10.9 does not have python 3.5
 export MB_PYTHON_OSX_VER=10.6

kokoro/release/python/windows/build_artifacts.bat

@@ -72,6 +72,16 @@ SET PYTHON_VERSION=3.8
 SET PYTHON_ARCH=64
 CALL build_single_artifact.bat || goto :error
 
+SET PYTHON=C:\python39_32bit
+SET PYTHON_VERSION=3.9
+SET PYTHON_ARCH=32
+CALL build_single_artifact.bat || goto :error
+
+SET PYTHON=C:\python39
+SET PYTHON_VERSION=3.9
+SET PYTHON_ARCH=64
+CALL build_single_artifact.bat || goto :error
+
 goto :EOF
 
 :error

kokoro/release/python/windows/build_single_artifact.bat

@@ -24,6 +24,12 @@ if %PYTHON%==C:\python38_32bit set vcplatform=Win32
 if %PYTHON%==C:\python38 set generator=Visual Studio 14 Win64
 if %PYTHON%==C:\python38 set vcplatform=x64
 
+if %PYTHON%==C:\python39_32bit set generator=Visual Studio 14
+if %PYTHON%==C:\python39_32bit set vcplatform=Win32
+
+if %PYTHON%==C:\python39 set generator=Visual Studio 14 Win64
+if %PYTHON%==C:\python39 set vcplatform=x64
+
 REM Prepend newly installed Python to the PATH of this build (this cannot be
 REM done from inside the powershell script as it would require to restart
 REM the parent CMD process).

python/setup.py

@@ -279,6 +279,8 @@ if __name__ == '__main__':
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         ],
       namespace_packages=['google'],
       packages=find_packages(

python/tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{27,33,34,35,36}-{cpp,python}
+    py{27,33,34,35,36,37,38,39}-{cpp,python}
 
 [testenv]
 usedevelop=true

tests.sh

@@ -356,6 +356,10 @@ build_python38() {
   build_python_version py38-python
 }
 
+build_python39() {
+  build_python_version py38-python
+}
+
 build_python_cpp() {
   internal_build_cpp
   export LD_LIBRARY_PATH=../src/.libs # for Linux
@@ -408,6 +412,10 @@ build_python38_cpp() {
   build_python_cpp_version py38-cpp
 }
 
+build_python39_cpp() {
+  build_python_cpp_version py38-cpp
+}
+
 build_python_compatibility() {
   internal_build_cpp
   # Use the unit-tests extracted from 2.5.0 to test the compatibility.