From a441150bf5a4d7428a7c2485cb3cccd6be04743c Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:14:46 +0200
Subject: [PATCH 01/14] Add tox and pyenv helper

---
 .gitignore                |  3 ++-
 scripts/run_with_pyenv.sh | 23 +++++++++++++++++++++++
 tox.ini                   | 17 +++++++++++++++++
 3 files changed, 42 insertions(+), 1 deletion(-)
 create mode 100755 scripts/run_with_pyenv.sh
 create mode 100644 tox.ini

diff --git a/.gitignore b/.gitignore
index 01925c5..1c353da 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,4 +6,5 @@ MANIFEST
 *.so
 *.swp
 venv/
-.venv/
\ No newline at end of file
+.venv/
+.python-version
diff --git a/scripts/run_with_pyenv.sh b/scripts/run_with_pyenv.sh
new file mode 100755
index 0000000..184eddf
--- /dev/null
+++ b/scripts/run_with_pyenv.sh
@@ -0,0 +1,23 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+if ! command -v pyenv >/dev/null 2>&1; then
+  echo "pyenv is not installed. Install it first: https://github.com/pyenv/pyenv" >&2
+  exit 1
+fi
+
+version="${1:-3.13}"
+
+if [[ "$version" == "2.7" ]]; then
+  version="2.7.18"
+fi
+
+if ! pyenv versions --bare | grep -Fxq "$version"; then
+  echo "Python $version is not installed under pyenv yet. Install it first, for example: pyenv install $version" >&2
+  exit 1
+fi
+
+pyenv local "$version"
+python -m pip install --upgrade pip setuptools wheel
+python -m pip install .
+python -m unittest discover -s test -p 'test_*.py'
diff --git a/tox.ini b/tox.ini
new file mode 100644
index 0000000..f015ed6
--- /dev/null
+++ b/tox.ini
@@ -0,0 +1,17 @@
+[tox]
+envlist = py39,py310,py311,py312,py313,py314,py27
+skipsdist = False
+
+[testenv]
+basepython =
+    py39: python3.9
+    py310: python3.10
+    py311: python3.11
+    py312: python3.12
+    py313: python3.13
+    py314: python3.14
+    py27: python2.7
+setenv =
+    PIP_DISABLE_PIP_VERSION_CHECK = 1
+commands =
+    python -m unittest discover -s test -p 'test_*.py'

From 48083552b0c5706692563005774fa7b047da5d33 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:18:19 +0200
Subject: [PATCH 02/14] Add Github actions based workflow

---
 .github/workflows/ci.yml | 145 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 145 insertions(+)
 create mode 100644 .github/workflows/ci.yml

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
new file mode 100644
index 0000000..090a122
--- /dev/null
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,145 @@
+name: CI
+
+on:
+  push:
+    branches:
+    - master
+    - main
+    tags:
+    - 'v*'
+  pull_request:
+
+
+jobs:
+  test:
+    name: Python ${{ matrix.python-version }} on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      fail-fast: false
+      matrix:
+        include:
+        - os: ubuntu-latest
+          python-version: '3.9'
+        - os: macos-latest
+          python-version: '3.9'
+        - os: windows-latest
+          python-version: '3.9'
+        - os: ubuntu-latest
+          python-version: '3.10'
+        - os: macos-latest
+          python-version: '3.10'
+        - os: windows-latest
+          python-version: '3.10'
+        - os: ubuntu-latest
+          python-version: '3.11'
+        - os: macos-latest
+          python-version: '3.11'
+        - os: windows-latest
+          python-version: '3.11'
+        - os: ubuntu-latest
+          python-version: '3.12'
+        - os: macos-latest
+          python-version: '3.12'
+        - os: windows-latest
+          python-version: '3.12'
+        - os: ubuntu-latest
+          python-version: '3.13'
+        - os: macos-latest
+          python-version: '3.13'
+        - os: windows-latest
+          python-version: '3.13'
+        - os: ubuntu-latest
+          python-version: '3.14'
+        - os: macos-latest
+          python-version: '3.14'
+        - os: windows-latest
+          python-version: '3.14'
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python ${{ matrix.python-version }}
+      uses: actions/setup-python@v5
+      with:
+        python-version: ${{ matrix.python-version }}
+        cache: pip
+
+    - name: Install build dependencies
+      run: |
+        python -m pip install --upgrade pip setuptools wheel
+
+    - name: Install package
+      run: |
+        python -m pip install .
+
+    - name: Run tests
+      run: |
+        python -m unittest discover -s test -p 'test_*.py'
+
+  test-py27:
+    name: Python 2.7 on Ubuntu
+    runs-on: ubuntu-latest
+    container:
+      image: python:2.7.18-buster
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Build extension in place
+      run: |
+        python setup.py build_ext --inplace
+
+    - name: Run tests
+      run: |
+        python -m unittest discover -s test -p 'test_*.py'
+
+  build:
+    name: Build distributions
+    runs-on: ubuntu-latest
+    needs: [ test, test-py27 ]
+    if: startsWith(github.ref, 'refs/tags/')
+
+    steps:
+    - name: Check out repository
+      uses: actions/checkout@v4
+
+    - name: Set up Python 3.12
+      uses: actions/setup-python@v5
+      with:
+        python-version: '3.12'
+        cache: pip
+
+    - name: Build source and wheel distributions
+      run: |
+        python -m pip install --upgrade pip build
+        python -m build
+
+    - name: Upload build artifacts
+      uses: actions/upload-artifact@v4
+      with:
+        name: dist
+        path: dist/*
+
+  publish:
+    name: Publish to PyPI
+    runs-on: ubuntu-latest
+    needs: build
+    if: startsWith(github.ref, 'refs/tags/')
+    environment:
+      name: pypi
+    permissions:
+      id-token: write
+
+    steps:
+    - name: Download build artifacts
+      uses: actions/download-artifact@v4
+      with:
+        name: dist
+        path: dist
+
+    - name: Publish package
+      uses: pypa/gh-action-pypi-publish@release/v1
+      with:
+        packages-dir: dist/

From 43d1fc5e3655853659e834d05b5c38d1df2e07b5 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:19:59 +0200
Subject: [PATCH 03/14] Remove Travis and Appveyor

---
 .appveyor/appveyor-bootstrap.py      | 162 ---------------
 .appveyor/appveyor-with-compiler.cmd |  50 -----
 .travis.yml                          | 184 -----------------
 .travis/travis-release.py            | 289 ---------------------------
 appveyor.yml                         | 170 ----------------
 5 files changed, 855 deletions(-)
 delete mode 100644 .appveyor/appveyor-bootstrap.py
 delete mode 100644 .appveyor/appveyor-with-compiler.cmd
 delete mode 100644 .travis.yml
 delete mode 100644 .travis/travis-release.py
 delete mode 100644 appveyor.yml

diff --git a/.appveyor/appveyor-bootstrap.py b/.appveyor/appveyor-bootstrap.py
deleted file mode 100644
index 0468e1b..0000000
--- a/.appveyor/appveyor-bootstrap.py
+++ /dev/null
@@ -1,162 +0,0 @@
-"""
-AppVeyor will at least have few Pythons around so there's no point of
-implementing a bootstrapper in PowerShell.
-
-This is a port of
-https://github.com/pypa/python-packaging-user-guide/blob/master/source/code/install.ps1
-with various fixes and improvements that just weren't feasible to
-implement in PowerShell.
-"""
-from __future__ import print_function
-
-import logging
-
-from os import environ
-from os.path import exists
-from subprocess import check_call
-
-try:
-    from urllib.request import urlretrieve
-except ImportError:
-    from urllib import urlretrieve
-
-
-log = logging.getLogger(__name__)
-
-
-BASE_URL = "https://www.python.org/ftp/python/"
-GET_PIP_URL = "https://bootstrap.pypa.io/get-pip.py"
-GET_PIP_PATH = "C:\get-pip.py"
-URLS = {
-    ("2.6", "64"): BASE_URL + "2.6.6/python-2.6.6.amd64.msi",
-    ("2.6", "32"): BASE_URL + "2.6.6/python-2.6.6.msi",
-    ("2.7", "64"): BASE_URL + "2.7.18/python-2.7.18.amd64.msi",
-    ("2.7", "32"): BASE_URL + "2.7.18/python-2.7.18.msi",
-    ("3.3", "64"): BASE_URL + "3.3.3/python-3.3.5.amd64.msi",
-    ("3.3", "32"): BASE_URL + "3.3.3/python-3.3.5.msi",
-    ("3.4", "64"): BASE_URL + "3.4.4/python-3.4.4.amd64.msi",
-    ("3.4", "32"): BASE_URL + "3.4.4/python-3.4.4.msi",
-    # NOTE: no .msi installer since 3.5
-    ("3.5", "64"): BASE_URL + "3.5.4/python-3.5.4-amd64.exe",
-    ("3.5", "32"): BASE_URL + "3.5.4/python-3.5.4.exe",
-    ("3.6", "64"): BASE_URL + "3.6.8/python-3.6.8-amd64.exe",
-    ("3.6", "32"): BASE_URL + "3.6.8/python-3.6.8.exe",
-    ("3.7", "64"): BASE_URL + "3.7.8/python-3.7.8-amd64.exe",
-    ("3.7", "32"): BASE_URL + "3.7.8/python-3.7.8.exe",
-    ("3.8", "64"): BASE_URL + "3.8.10/python-3.8.10-amd64.exe",
-    ("3.8", "32"): BASE_URL + "3.8.10/python-3.8.10.exe",
-    ("3.9", "64"): BASE_URL + "3.9.13/python-3.9.13-amd64.exe",
-    ("3.9", "32"): BASE_URL + "3.9.13/python-3.9.13.exe",
-    ("3.10", "64"): BASE_URL + "3.10.11/python-3.10.11-amd64.exe",
-    ("3.10", "32"): BASE_URL + "3.10.11/python-3.10.11.exe",
-    ("3.11", "64"): BASE_URL + "3.11.7/python-3.11.7-amd64.exe",
-    ("3.11", "32"): BASE_URL + "3.11.7/python-3.11.7.exe",
-    ("3.12", "64"): BASE_URL + "3.12.1/python-3.12.1-amd64.exe",
-    ("3.12", "32"): BASE_URL + "3.12.1/python-3.12.1.exe",
-}
-INSTALL_CMD = {
-    # Commands are allowed to fail only if they are not the last command.
-    # Eg: uninstall (/x) allowed to fail.
-    "2.6": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
-            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}",
-             "TARGETDIR={home}"]],
-    "2.7": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
-            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}",
-             "TARGETDIR={home}"]],
-    "3.3": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
-            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}",
-             "TARGETDIR={home}"]],
-    "3.4": [["msiexec.exe", "/L*+!", "install.log", "/qn", "/x", "{path}"],
-            ["msiexec.exe", "/L*+!", "install.log", "/qn", "/i", "{path}",
-             "TARGETDIR={home}"]],
-    "3.5": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.6": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.7": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.8": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.9": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.10": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.11": [["{path}", "/quiet", "TargetDir={home}"]],
-    "3.12": [["{path}", "/quiet", "TargetDir={home}"]],
-}
-
-
-def download_file(url, path):
-    log.info("Downloading: %s (into %s).", url, path)
-    progress = [0, 0]
-
-    def report(count, size, total):
-        progress[0] = count * size
-        if progress[0] - progress[1] > 1000000:
-            progress[1] = progress[0]
-            log.info("Downloaded %s/%s ...", progress[1], total)
-
-    dest, _ = urlretrieve(url, path, reporthook=report)
-    return dest
-
-
-def install_python(version, arch, home):
-    log.info("Installing Python %s for %s bit architecture to '%s'.",
-             version, arch, home)
-    if exists(home):
-        return
-
-    path = download_python(version, arch)
-    log.info("Installing '%s' to '%s'.", path, home)
-    success = False
-    for cmd in INSTALL_CMD[version]:
-        cmd = [part.format(home=home, path=path) for part in cmd]
-        log.info("Running '%s'.", " ".join(cmd))
-        try:
-            check_call(cmd)
-        except Exception:
-            log.exception("Failed command '%s'.", " ".join(cmd))
-            if exists("install.log"):
-                with open("install.log") as fh:
-                    log.error(fh.read())
-        else:
-            success = True
-    if success:
-        log.info("Installation complete.")
-    else:
-        log.error("Installation failed.")
-
-
-def download_python(version, arch):
-    for _ in range(3):
-        try:
-            return download_file(URLS[version, arch], "installer.exe")
-        except Exception:
-            log.exception("Failed to download.")
-        log.info("Retrying ...")
-
-
-def install_pip(home):
-    pip_path = home + "/Scripts/pip.exe"
-    python_path = home + "/python.exe"
-    if exists(pip_path):
-        log.info("pip already installed, try to upgrade it.")
-        cmd = [python_path, "-m", "pip", "install", "--upgrade", "pip"]
-        check_call(cmd)
-    else:
-        log.info("Installing pip.")
-        download_file(GET_PIP_URL, GET_PIP_PATH)
-        log.info("Executing: %s %s", python_path, GET_PIP_PATH)
-        check_call([python_path, GET_PIP_PATH])
-
-
-def install_packages(home, *packages):
-    cmd = [home + "/Scripts/pip.exe", "install"]
-    cmd.extend(packages)
-    check_call(cmd)
-
-
-if __name__ == '__main__':
-    logging.basicConfig(level=logging.DEBUG,
-                        format="%(message)s")
-
-    install_python(environ['PYTHON_VERSION'],
-                   environ['PYTHON_ARCH'],
-                   environ['PYTHON_HOME'])
-    install_pip(environ['PYTHON_HOME'])
-    install_packages(environ['PYTHON_HOME'],
-                     "setuptools>=36.4.0", "wheel")
diff --git a/.appveyor/appveyor-with-compiler.cmd b/.appveyor/appveyor-with-compiler.cmd
deleted file mode 100644
index a3e5d22..0000000
--- a/.appveyor/appveyor-with-compiler.cmd
+++ /dev/null
@@ -1,50 +0,0 @@
-:: To build extensions for 64 bit Python 3, we need to configure environment
-:: variables to use the MSVC 2010 C++ compilers from GRMSDKX_EN_DVD.iso of:
-:: MS Windows SDK for Windows 7 and .NET Framework 4 (SDK v7.1)
-::
-:: To build extensions for 64 bit Python 2, we need to configure environment
-:: variables to use the MSVC 2008 C++ compilers from GRMSDKX_EN_DVD.iso of:
-:: MS Windows SDK for Windows 7 and .NET Framework 3.5 (SDK v7.0)
-::
-:: 32 bit builds do not require specific environment configurations.
-::
-:: Note: this script needs to be run with the /E:ON and /V:ON flags for the
-:: cmd interpreter, at least for (SDK v7.0)
-::
-:: More details at:
-:: https://github.com/cython/cython/wiki/64BitCythonExtensionsOnWindows
-:: http://stackoverflow.com/a/13751649/163740
-::
-:: Author: Olivier Grisel
-:: License: CC0 1.0 Universal: http://creativecommons.org/publicdomain/zero/1.0/
-@ECHO OFF
-SET COMMAND_TO_RUN=%*
-SET WIN_SDK_ROOT=C:\Program Files\Microsoft SDKs\Windows
-SET WIN_WDK="c:\Program Files (x86)\Windows Kits\10\Include\wdf"
-ECHO SDK: %WINDOWS_SDK_VERSION% ARCH: %PYTHON_ARCH%
-
-
-IF "%PYTHON_VERSION%"=="3.5"  GOTO main
-IF "%PYTHON_VERSION%"=="3.6"  GOTO main
-IF "%PYTHON_VERSION%"=="3.7"  GOTO main
-IF "%PYTHON_VERSION%"=="3.8"  GOTO main
-IF "%PYTHON_VERSION%"=="3.9"  GOTO main
-IF "%PYTHON_VERSION%"=="3.10" GOTO main
-IF "%PYTHON_VERSION%"=="3.11" GOTO main
-IF "%PYTHON_VERSION%"=="3.12" GOTO main
-IF "%PYTHON_ARCH%"=="32"      GOTO main
-
-
-SET DISTUTILS_USE_SDK=1
-SET MSSdk=1
-"%WIN_SDK_ROOT%\%WINDOWS_SDK_VERSION%\Setup\WindowsSdkVer.exe" -q -version:%WINDOWS_SDK_VERSION%
-CALL "%WIN_SDK_ROOT%\%WINDOWS_SDK_VERSION%\Bin\SetEnv.cmd" /x64 /release
-
-:main
-IF EXIST %WIN_WDK% (
-    REM See: https://connect.microsoft.com/VisualStudio/feedback/details/1610302/
-    REN %WIN_WDK% 0wdf
-)
-
-ECHO Executing: %COMMAND_TO_RUN%
-CALL %COMMAND_TO_RUN% || EXIT 1
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index 72b74e8..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,184 +0,0 @@
-language: python
-cache: pip
-
-env:
-  global:
-    # GITHUB_API_TOKEN
-    - secure: YNLKYudc4YRn+i89r20lB8oDoigXqiBWHpBi+QVNUCuzbHcp1rtK5/uwvbMEzERPTcRsFcqp0BHOaXf8PzWFVYVVlLCag9eX69HuOopHakW6zvZgWEv5ZVUbzLatJmOJ6BXIP+b6o83lgrO1khG2e8VRPVVwO8D0kadr2zwpuH4=
-    # APPVEYOR_API_TOKEN
-    - secure: UaLfn9kWVK+EyYxvjZzoV3m3ODs+iD0F57kCF4Z+YqXdo3oPxd+hIoEpo9VtkXAvhNLbj3kvCyiv+J+lqEwuR6uoAFaiz70LaAsxIX1CuHzNhJRxUglK4TdTdoGXHo2bbiTPZRnPkYwFYip5ehx8q7tPnL+xgu3AiTTLvSr0R6g=
-    # TWINE_USERNAME
-    - secure: Od+iImlaOP2qzkGstfj3TTmhqWDdtZ1+CGFPJnHzZ9mj9l3Pg1Aek369f1MsGBXZeJqojiTx1xg/XzW3xH39QzbuynMGEFYOAZDnQMJsT990H1vKyHsoQ86t4n0T7FEIs6B5BzP1oDROdADHcxmRQ1BoSvWumbq/isGewArGO0M=
-    # TWINE_PASSWORD
-    - secure: cMN061O5PjB3B8+iSEgyo/qe3QPSDW8GaAupYtHKLnxT2M6JiepuVzZL40y9I1QTnZQMf8VIKH7XExLkgyVvbKZyQCctp9tioBBiAafp6uhAQMLSzj1+03gBzaJQJySPMLX4Snfa/TuhOqym5m4kYQTX/p3qCImzkgxWW1SV+rc=
-    - TWINE_TEST_REPOSITORY=pypitest
-    - TWINE_TEST_REPOSITORY_URL=https://test.pypi.org/legacy/
-    - TWINE_PROD_REPOSITORY=pypi
-    - TWINE_PROD_REPOSITORY_URL=https://upload.pypi.org/legacy/
-
-stages:
-  - name: test
-  - name: deploy
-    if: type = push AND tag IS present
-
-os:
-  - linux
-dist: jammy
-
-addons:
-  apt:
-    packages:
-      - pandoc
-
-python:
-  # Each commented python version has a custom include for a different distro
-  # - "2.7"
-  # - "pypy"
-  - "pypy3"
-  # - "3.3"
-  # - "3.4"
-  # - "3.5"
-  # - "3.6"
-  - "3.7"
-  - "3.8"
-  - "3.9"
-  - "3.10"
-  - "3.11"
-  - "3.12"
-
-before_install:
-  - if [[ $TRAVIS_OS_NAME == "osx" ]]; then
-      echo "Updating brew packages.";
-      brew update 1>&2 || travis_terminate 1;
-      if [[ $TRAVIS_PYTHON_VERSION == "2.7" ]]; then
-        echo "Installing python 2.";
-        brew install python@2 1>&2 || travis_terminate 1;
-        pip install virtualenv || travis_terminate 1;
-        virtualenv venv -p python2;
-      elif [[ $TRAVIS_PYTHON_VERSION == "3.12" ]]; then
-        echo "Installing python 3.";
-        brew install python@3.12 1>&2 || travis_terminate 1;
-        pip3 install virtualenv || travis_terminate 1;
-        virtualenv venv -p python3;
-      fi;
-      source venv/bin/activate || travis_terminate 1;
-    fi
-  - if [[ $TRAVIS_PULL_REQUEST == false && -n $TRAVIS_TAG ]]; then
-      if [[ $TRAVIS_OS_NAME == "osx" ]]; then
-        echo "Installing pandoc.";
-        brew install pandoc 1>&2 || travis_terminate 1;
-      fi;
-      echo "Installing pypandoc.";
-      pip install pypandoc || travis_terminate 1;
-    fi
-
-install:
-  - pip install .
-
-script: 
-  - python --version || travis_terminate 1
-  - python setup.py test || travis_terminate 1
-  # Need to pick a Python version to create the source distribution.
-  - if [[ $TRAVIS_PYTHON_VERSION == "3.12" && $TRAVIS_OS_NAME == linux && $TRAVIS_PULL_REQUEST == false && -n $TRAVIS_TAG ]]; then
-      echo "Creating source distribution.";
-      python setup.py sdist || travis_terminate 1;
-    else
-      echo "Skip creation of source distribution.";
-    fi
-  # Binary wheels for Linux that are too platform specific are not allowed to
-  # be uploaded on PyPI. As we need to compile C code, we only create them on OSX.
-  - if [[ $TRAVIS_OS_NAME == osx && $TRAVIS_PULL_REQUEST == false && -n $TRAVIS_TAG ]]; then
-      echo "Creating binary distribution wheel.";
-      python setup.py bdist_wheel || travis_terminate 1;
-    else
-      echo "Skip creation of binary distribution wheel.";
-    fi
-
-deploy:
-  provider: releases
-  token:
-    secure: Oy5f4YjhoPd1tAFK0nlD9ZmWYH1cpnl5R3erPinemU4S/8l0jyTb4e5gdYVhluzSTZGrvNKJREwTSsq6yOriNc9EgTc/YwkFczkFuPokGzNO+VNfaEfsm9v/zcPH+Tpc51mFWXYnhFzBkJeIeRPNoVXCifFL+WxoCyWg6ljpVHg=
-  file_glob: true
-  file:
-    - dist/Whirlpool-*.tar.gz
-    - dist/Whirlpool-*.whl
-  on:
-    tags: true
-
-jobs:
-  fast_finish: true
-  include:
-    # Python 3.3 is available on distro Trusty
-    - stage: test
-      language: python
-      python: 3.3
-      dist: trusty
-      env: TRAVIS_PYTHON_VERSION=3.3
-    # Python 2.7, pypy, 3.4, 3.5 and 3.6 are available on distro Xenial
-    - stage: test
-      language: python
-      python: 2.7
-      dist: xenial
-      env: TRAVIS_PYTHON_VERSION=2.7
-    - stage: test
-      language: python
-      python: pypy
-      dist: xenial
-      env: TRAVIS_PYTHON_VERSION=pypy
-    - stage: test
-      language: python
-      python: 3.4
-      dist: xenial
-      env: TRAVIS_PYTHON_VERSION=3.4
-    - stage: test
-      language: python
-      python: 3.5
-      dist: xenial
-      env: TRAVIS_PYTHON_VERSION=3.5
-    - stage: test
-      language: python
-      python: 3.6
-      dist: xenial
-      env: TRAVIS_PYTHON_VERSION=3.6
-    # Manually include OSX in the job matrix, but only for
-    # Python 2.7 and 3.12.
-    - stage: test
-      language: generic
-      python: 2.7
-      os: osx
-      osx_image: xcode12.2
-      env: TRAVIS_PYTHON_VERSION=2.7
-    - stage: test
-      language: generic
-      python: 3.12
-      os: osx
-      osx_image: xcode14.2
-      env: TRAVIS_PYTHON_VERSION=3.12
-    # As the deploy script fetches all build artifacts uploaded to GitHub of
-    # all stages, we only need to run it once.
-    # So pinning it to Python 3.12 on Linux.
-    - stage: deploy
-      python: 3.12
-      os: linux
-      cache: false
-      before_install: skip
-      install: skip
-      script:
-        - echo "Check build status."
-        - python .travis/travis-release.py || travis_terminate 1
-        - echo "Installing Twine."
-        - pip install twine || travis_terminate 1
-        - if [[ $TRAVIS_PULL_REQUEST == false && -n $TRAVIS_TAG ]]; then
-            if [[ $TRAVIS_TAG =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]]; then
-              echo "Deploy to production PyPI.";
-              twine upload -r $TWINE_PROD_REPOSITORY --repository-url $TWINE_PROD_REPOSITORY_URL dist/* --skip-existing || travis_terminate 1;
-            else
-              echo "Deploy to test PyPI.";
-              twine upload -r $TWINE_TEST_REPOSITORY --repository-url $TWINE_TEST_REPOSITORY_URL dist/* --skip-existing || travis_terminate 1;
-            fi;
-          fi
-
-notifications:
-  email:
-    on_success: never
-    on_failure: change
diff --git a/.travis/travis-release.py b/.travis/travis-release.py
deleted file mode 100644
index 8b518b9..0000000
--- a/.travis/travis-release.py
+++ /dev/null
@@ -1,289 +0,0 @@
-import errno
-import json
-import logging
-import os
-import re
-import shutil
-import stat
-
-from time import sleep
-
-try:
-    from urllib.request import urlretrieve, urlopen, Request
-except ImportError:
-    from urllib import urlretrieve
-    from urllib2 import urlopen, Request
-
-
-log = logging.getLogger(__name__)
-
-
-DIST_DIR = 'dist'
-
-BASE_GITHUB_API = 'https://api.github.com/repos'
-GITHUB_RELEASES_TAGS = '{}/{}/releases/tags/{}'
-
-BASE_APPVEYOR_API = 'https://ci.appveyor.com/api'
-APPVEYOR_BUILD_HISTORY = '{}/projects/{}/history?recordsNumber=20'
-APPVEYOR_BUILD_VERSION = '{}/projects/{}/build/{}'
-
-
-class ReleaseException(Exception):
-    """Base exception class for release errors."""
-
-
-class ReleaseVersionException(ReleaseException):
-    """Version mismatch between code and tagged release."""
-
-
-class ApiTimeout(ReleaseException):
-    """Could not reach API endpoint."""
-
-
-class AppVeyorBuildFailed(ReleaseException):
-    """Exception raised on failed build runs."""
-
-
-class AppVeyorBuildCancelled(ReleaseException):
-    """Exception raised on cancelled build."""
-
-
-class AppVeyorBuildTimeout(ReleaseException):
-    """Exception raised on build timeout."""
-
-
-def download_file(url, path):
-    """Download the target of url and store as local file in path."""
-    log.info("Downloading: %s (into %s).", url, path)
-    progress = [0, 0]
-
-    def report(count, size, total):
-        progress[0] = count * size
-        if progress[0] - progress[1] > 1000000:
-            progress[1] = progress[0]
-            log.info("Downloaded %s/%s ...", progress[1], total)
-
-    dest, _ = urlretrieve(url, path, reporthook=report)
-    return dest
-
-
-def api_request(url, token):
-    """Send a request to API at url and decode the response as json."""
-    response = None
-    for i in range(3):
-        try:
-            log.info("Sending API request to '%s'.", url)
-            request = Request(url)
-            if token is not None:
-                request.add_header('Authorization', 'token {}'.format(token))
-            response = urlopen(request)
-            break
-        except Exception:
-            log.exception("Failed to call API.")
-        log.info("Retrying ...")
-        sleep(i)
-    if response is None:
-        raise ApiTimeout("Could not reach API at '{}'.".format(url))
-
-    try:
-        charset = response.info().get_content_charset()
-    except AttributeError:
-        charset = response.info().getparam('charset')
-        if not charset:
-            charset = 'utf-8'
-    data = json.loads(response.read().decode(charset))
-    return data
-
-
-def is_regular_dir(path):
-    """Return non-zero if path is a directory."""
-    try:
-        mode = os.lstat(path).st_mode
-    except os.error:
-        mode = 0
-    return stat.S_ISDIR(mode)
-
-
-def force_remove_file_or_symlink(path):
-    """Try to remove the file referenced by path. If it fails try again by
-    setting write permission.
-    """
-    try:
-        os.remove(path)
-    except OSError:
-        os.lchmod(path, stat.S_IWRITE)
-        os.remove(path)
-
-
-def remove_readonly(func, path, excinfo):
-    """Error handling function for shutil.rmtree to try the file or directory
-    remove operation again by setting write permission.
-
-    Function taken from: https://stackoverflow.com/a/1889686
-    """
-    if func is os.rmdir:
-        os.chmod(path, stat.S_IWRITE)
-        os.rmdir(path)
-    elif func is os.remove:
-        os.lchmod(path, stat.S_IWRITE)
-        os.remove(path)
-
-
-def clear_dir(path):
-    """Remove all files and directories from path. The path itself remains
-    untouched.
-
-    Function taken from: https://stackoverflow.com/a/24844618
-    """
-    if is_regular_dir(path):
-        for name in os.listdir(path):
-            fullpath = os.path.join(path, name)
-            if is_regular_dir(fullpath):
-                shutil.rmtree(fullpath, onerror=remove_readonly)
-            else:
-                force_remove_file_or_symlink(fullpath)
-    else:
-        raise OSError(errno.ENOTDIR, os.strerror(errno.ENOTDIR), path)
-
-
-def download_github_tagged_release(path, url, tag, token):
-    """Download all assets that belong to GitHub url for given tag.
-
-    The local directory path is cleared of any existing files
-    before downloading takes place.
-    """
-    filenames = []
-    if os.path.exists(path):
-        log.info("Clearing existing download path '%s'.", path)
-        clear_dir(path)
-    else:
-        log.info("Creating download path '%s'.", path)
-        os.makedirs(path)
-
-    log.info("Retrieving GitHub assets for tag '%s'.", tag)
-    data = api_request(url, token)
-    for asset in data['assets']:
-        download_file(asset['browser_download_url'],
-                      os.path.join(path, asset['name']))
-        filenames.append(asset['name'])
-        sleep(5)
-    return filenames
-
-
-def check_appveyor_build_status(url, token):
-    """Poll url for final build status for max 20 times with a three minute
-    interval.
-    """
-    status = 'queued'
-    for _ in range(20):
-        data = api_request(url, token)
-        build = data['build']
-        status = build['status']
-        if status in ('success', 'failed',
-                      'cancelled', 'cancelling'):
-            return status
-        log.info("Build status of build with version '%s' and tag '%s' "
-                 "is %s.", build['version'], build['tag'], status)
-        sleep(180)
-    return status
-
-
-def check_appveyor_tagged_build(url, tag, token):
-    """Examine the AppVeyor build history for any build with the specified
-    tag. When the build still needs to finish keep polling for updates
-    until done or timed out.
-
-    Returns true when build is successful or raises an exception otherwise.
-    """
-    log.info("Retrieving AppVeyor build history.")
-    data = api_request(url, token)
-    status = 'unknown'
-    for build in data['builds']:
-        if build['isTag'] and build['tag'] == tag:
-            status = build['status']
-            if status in ('success', 'failed'):
-                # Found a final state, no need to check prior builds.
-                break
-            elif status in ('cancelled', 'cancelling'):
-                # Try to see if a prior build was successful.
-                continue
-            elif status in ('queued', 'running'):
-                av_build_url = APPVEYOR_BUILD_VERSION.format(
-                    BASE_APPVEYOR_API,
-                    os.environ['TRAVIS_REPO_SLUG'],
-                    build['version'])
-                status = check_appveyor_build_status(av_build_url, token)
-                break
-    # Done checking build history, examine final status.
-    if status == 'unknown':
-        raise AppVeyorBuildTimeout("No build found for tag '{}'".format(tag))
-    elif status == 'success':
-        log.info("Build version '%s' with tag '%s' "
-                 "was successful.", build['version'], tag)
-        return True
-    elif status in ('cancelled', 'cancelling'):
-        raise AppVeyorBuildCancelled("Build version '{}' with tag '{}' was "
-                                     "cancelled.".format(build['version'],
-                                                         tag))
-    elif status == 'failed':
-        raise AppVeyorBuildFailed("Build version '{}' with tag '{}' "
-                                  "failed.".format(build['version'],
-                                                   tag))
-    elif status in ('queued', 'running'):
-        raise AppVeyorBuildTimeout("Build version '{}' with tag '{}' "
-                                   "timed out.".format(build['version'],
-                                                       tag))
-    else:
-        raise ReleaseException("Unrecognized status '{}' for build version "
-                               "'{}' with tag '{}'.".format(status,
-                                                            build['version'],
-                                                            tag))
-
-
-def check_code_version(filenames, tag):
-    """Check if the asset filenames relate to the tag version.
-
-    When tag is in the form v0.1.2 the first character is stripped.
-
-    Raises ReleaseVersionException when the tag is not found in any
-    of the asset file names.
-    """
-    if re.match(r"v\d+\.\d+\.\d+", tag) is not None:
-        file_tag = tag[1:]
-    else:
-        file_tag = tag
-    wheel_part = "-{}-".format(file_tag)
-    targz_part = "-{}.tar.gz".format(file_tag)
-    for filename in filenames:
-        if (filename[-4:] == '.whl') and (wheel_part not in filename):
-            log.error("Filename '%s' does not correspond "
-                      "to tag '%s'.", filename, tag)
-            raise ReleaseVersionException("Version mismatch "
-                                          "between code and tag")
-        if (filename[-7:] == '.tar.gz') and (targz_part not in filename):
-            log.error("Filename '%s' does not correspond "
-                      "to tag '%s'.", filename, tag)
-            raise ReleaseVersionException("Version mismatch "
-                                          "between code and tag")
-    return True
-
-
-if __name__ == '__main__':
-    logging.basicConfig(level=logging.DEBUG,
-                        format="%(message)s")
-
-    tag = os.environ['TRAVIS_TAG']
-    gh_token = os.environ.get('GITHUB_API_TOKEN')
-    av_token = os.environ.get('APPVEYOR_API_TOKEN')
-    gh_url = GITHUB_RELEASES_TAGS.format(BASE_GITHUB_API,
-                                         os.environ['TRAVIS_REPO_SLUG'],
-                                         tag)
-    av_url = APPVEYOR_BUILD_HISTORY.format(BASE_APPVEYOR_API,
-                                           os.environ['TRAVIS_REPO_SLUG'])
-    if check_appveyor_tagged_build(av_url, tag, av_token):
-        log.info("Download assets for tagged release '%s'.", tag)
-        filenames = download_github_tagged_release(DIST_DIR,
-                                                   gh_url, tag,
-                                                   gh_token)
-        log.info("All assets downloaded for tagged release '%s'.", tag)
-        check_code_version(filenames, tag)
diff --git a/appveyor.yml b/appveyor.yml
deleted file mode 100644
index 59184f9..0000000
--- a/appveyor.yml
+++ /dev/null
@@ -1,170 +0,0 @@
-version: '{branch}-{build}'
-cache:
-  - '%LOCALAPPDATA%\pip\Cache'
-environment:
-  global:
-    # SDK v7.0 MSVC Express 2008's SetEnv.cmd script will fail if the
-    # /E:ON and /V:ON options are not enabled in the batch script interpreter
-    # See: http://stackoverflow.com/a/13751649/163740
-    CMD_WITH_COMPILER: 'cmd /E:ON /V:ON /C .\.appveyor\appveyor-with-compiler.cmd'
-
-  matrix:
-    - PYTHON_VERSION: '2.7'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python27
-      PYTHON_EXE: C:\Python27\python.exe
-    - PYTHON_VERSION: '2.7'
-      PYTHON_ARCH: '64'
-      WINDOWS_SDK_VERSION: v7.0
-      PYTHON_HOME: C:\Python27-x64
-      PYTHON_EXE: C:\Python27-x64\python.exe
-    - PYTHON_VERSION: '3.3'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python33
-      PYTHON_EXE: C:\Python33\python.exe
-    - PYTHON_VERSION: '3.3'
-      PYTHON_ARCH: '64'
-      WINDOWS_SDK_VERSION: v7.1
-      PYTHON_HOME: C:\Python33-x64
-      PYTHON_EXE: C:\Python33-x64\python.exe
-    - PYTHON_VERSION: '3.4'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python34
-      PYTHON_EXE: C:\Python34\python.exe
-    - PYTHON_VERSION: '3.4'
-      PYTHON_ARCH: '64'
-      WINDOWS_SDK_VERSION: v7.1
-      PYTHON_HOME: C:\Python34-x64
-      PYTHON_EXE: C:\Python34-x64\python.exe
-    - PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python35
-      PYTHON_EXE: C:\Python35\python.exe
-    - PYTHON_VERSION: '3.5'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python35-x64
-      PYTHON_EXE: C:\Python35-x64\python.exe
-    - PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python36
-      PYTHON_EXE: C:\Python36\python.exe
-    - PYTHON_VERSION: '3.6'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python36-x64
-      PYTHON_EXE: C:\Python36-x64\python.exe
-    - PYTHON_VERSION: '3.7'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python37
-      PYTHON_EXE: C:\Python37\python.exe
-    - PYTHON_VERSION: '3.7'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python37-x64
-      PYTHON_EXE: C:\Python37-x64\python.exe
-    - PYTHON_VERSION: '3.8'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python38
-      PYTHON_EXE: C:\Python38\python.exe
-    - PYTHON_VERSION: '3.8'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python38-x64
-      PYTHON_EXE: C:\Python38-x64\python.exe
-    - PYTHON_VERSION: '3.9'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python39
-      PYTHON_EXE: C:\Python39\python.exe
-    - PYTHON_VERSION: '3.9'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python39-x64
-      PYTHON_EXE: C:\Python39-x64\python.exe
-    - PYTHON_VERSION: '3.10'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python310
-      PYTHON_EXE: C:\Python310\python.exe
-    - PYTHON_VERSION: '3.10'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python310-x64
-      PYTHON_EXE: C:\Python310-x64\python.exe
-    - PYTHON_VERSION: '3.11'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python311
-      PYTHON_EXE: C:\Python311\python.exe
-    - PYTHON_VERSION: '3.11'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python311-x64
-      PYTHON_EXE: C:\Python311-x64\python.exe
-    - PYTHON_VERSION: '3.12'
-      PYTHON_ARCH: '32'
-      PYTHON_HOME: C:\Python312
-      PYTHON_EXE: C:\Python312\python.exe
-    - PYTHON_VERSION: '3.12'
-      PYTHON_ARCH: '64'
-      PYTHON_HOME: C:\Python312-x64
-      PYTHON_EXE: C:\Python312-x64\python.exe
-
-matrix:
-  fast_finish: true
-
-init:
-  - ECHO "Installed Python versions:"
-  - ps: ls C:\Python*
-  - ECHO "Installed SDKs:"
-  - ps: ls "$env:ProgramFiles\Microsoft SDKs\Windows"
-
-install:
-  # If there is a newer build queued for the same PR, cancel this one.
-  # The AppVeyor 'rollout builds' option is supposed to serve the same
-  # purpose but it is problematic because it tends to cancel builds pushed
-  # directly to master instead of just PR builds (or the converse).
-  # credits: JuliaLang developers.
-  - ps: |
-      if ($env:APPVEYOR_PULL_REQUEST_NUMBER -and
-          $env:APPVEYOR_BUILD_NUMBER -ne
-          (
-              (Invoke-RestMethod https://ci.appveyor.com/api/projects/$env:APPVEYOR_ACCOUNT_NAME/$env:APPVEYOR_PROJECT_SLUG/history?recordsNumber=50
-              ).builds | Where-Object pullRequestId -eq $env:APPVEYOR_PULL_REQUEST_NUMBER
-          )[0].buildNumber
-         )
-      {
-          throw "There are newer queued builds for this pull request, failing early."
-      }
-  - python -u .appveyor\appveyor-bootstrap.py
-
-build: false
-
-test_script:
-  - "%CMD_WITH_COMPILER% %PYTHON_EXE% setup.py test"
-
-after_test:
-  - ps: |
-      if ($env:APPVEYOR_REPO_TAG -eq $true) {
-          Write-Host "Installing pandoc."
-          cinst --no-progress pandoc
-          if ($LastExitCode -ne 0) { $host.SetShouldExit($LastExitCode) }
-          Write-Host "Installing pypandoc."
-          Invoke-Expression "$env:CMD_WITH_COMPILER $env:PYTHON_EXE -m pip install pypandoc"
-          if ($LastExitCode -ne 0) { $host.SetShouldExit($LastExitCode) }
-          Write-Host "Creating binary distribution wheel."
-          Invoke-Expression "$env:CMD_WITH_COMPILER $env:PYTHON_EXE setup.py bdist_wheel"
-          if ($LastExitCode -ne 0) { $host.SetShouldExit($LastExitCode) }
-      }
-
-artifacts:
-  - path: dist\Whirlpool-*.whl
-    name: wheel
-
-deploy:
-  - provider: GitHub
-    auth_token:
-      secure: XL2Y+p18A7mTWLwutrqVVb73ZPibgTB+hZD9oP6iK8qylOur1VafOBjCi30K6+1Q
-    artifact: wheel
-    draft: false
-    prerelease: false
-    force_update: true
-    on:
-      appveyor_repo_tag: true
-
-notifications:
-  - provider: Email
-    on_build_success: false
-    on_build_failure: true
-    on_build_status_changed: false

From 1e4f95f44cde4ceecdff14a7f6f26a3564555d52 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:36:39 +0200
Subject: [PATCH 04/14] Add pypy2 and pypy3

---
 .github/workflows/ci.yml | 16 ++++++++++++++++
 tox.ini                  |  5 ++++-
 2 files changed, 20 insertions(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 090a122..7629638 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,17 +54,33 @@ jobs:
           python-version: '3.14'
         - os: windows-latest
           python-version: '3.14'
+        - os: ubuntu-latest
+          python-version: 'pypy2'
+        - os: ubuntu-latest
+          python-version: 'pypy3'
 
     steps:
     - name: Check out repository
       uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
+      if: matrix.python-version != 'pypy2'
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
 
+    - name: Install PyPy2 from source
+      if: matrix.python-version == 'pypy2'
+      run: |
+        sudo apt-get update
+        sudo apt-get install -y build-essential libbz2-dev libffi-dev libssl-dev libsqlite3-dev zlib1g-dev libncurses5-dev libgdbm-dev libc6-dev tk-dev libreadline-dev liblzma-dev
+        git clone --depth 1 https://github.com/pypy/pypy.git /tmp/pypy2
+        cd /tmp/pypy2
+        python3 ./rpython/bin/rpython --version || true
+        echo "PyPy2 provisioning is not supported by the GitHub-hosted runner image; this job is expected to fail unless a compatible toolchain is available."
+        exit 1
+
     - name: Install build dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel
diff --git a/tox.ini b/tox.ini
index f015ed6..d9f707d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,7 @@
 [tox]
-envlist = py39,py310,py311,py312,py313,py314,py27
+envlist = py39,py310,py311,py312,py313,py314,py27,pypy2_env,pypy3_env
 skipsdist = False
+skip_missing_interpreters = true
 
 [testenv]
 basepython =
@@ -11,6 +12,8 @@ basepython =
     py313: python3.13
     py314: python3.14
     py27: python2.7
+    pypy2_env: /opt/homebrew/bin/pypy
+    pypy3_env: /opt/homebrew/bin/pypy3
 setenv =
     PIP_DISABLE_PIP_VERSION_CHECK = 1
 commands =

From 409cf11cfff12e128cf4eb22172e1425b574b436 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:36:52 +0200
Subject: [PATCH 05/14] Update docs

---
 CHANGELOG.md | 2 +-
 README.md    | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd7e757..dd807b4 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,7 +8,7 @@ project adheres to [Semantic Versioning][semver].
 
 ### Added
 
-- Support for Python 3.11 and 3.12
+- Support for Python 3.11, 3.12, 3.13 and 3.14.
 
 ### Changed
 
diff --git a/README.md b/README.md
index e2758f3..1690090 100644
--- a/README.md
+++ b/README.md
@@ -64,7 +64,7 @@ Or install in editable mode using pip:
 
 ## Testing
 
-This module is tested using Python 2.7, PyPy, and Python 3.3 and up.
+This module is tested using Python 2.7, PyPy, and Python 3.9 and up.
 
 You can run the test suite using:
 

From 366070167d020283e3c129be804763e38a85fc1e Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:47:57 +0200
Subject: [PATCH 06/14] The GitHub Actions failure was caused by the
 setup-python cache step expecting a dependency manifest, but this repository
 uses setuptools metadata from setup.py rather than a requirements file.

---
 .github/workflows/ci.yml | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 7629638..00e843d 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -69,6 +69,9 @@ jobs:
       with:
         python-version: ${{ matrix.python-version }}
         cache: pip
+        cache-dependency-path: |
+          setup.py
+          tox.ini
 
     - name: Install PyPy2 from source
       if: matrix.python-version == 'pypy2'
@@ -126,6 +129,9 @@ jobs:
       with:
         python-version: '3.12'
         cache: pip
+        cache-dependency-path: |
+          setup.py
+          tox.ini
 
     - name: Build source and wheel distributions
       run: |

From 001562639baec59edd90b87e8d333bf5df7989d6 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:50:37 +0200
Subject: [PATCH 07/14] Update supported versions

---
 setup.py | 10 +++-------
 1 file changed, 3 insertions(+), 7 deletions(-)

diff --git a/setup.py b/setup.py
index 05b0e5b..c066ab3 100755
--- a/setup.py
+++ b/setup.py
@@ -44,16 +44,12 @@
           "Programming Language :: Python :: 2",
           "Programming Language :: Python :: 2.7",
           "Programming Language :: Python :: 3",
-          "Programming Language :: Python :: 3.3",
-          "Programming Language :: Python :: 3.4",
-          "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",
           "Programming Language :: Python :: 3.10",
           "Programming Language :: Python :: 3.11",
           "Programming Language :: Python :: 3.12",
+          "Programming Language :: Python :: 3.13",
+          "Programming Language :: Python :: 3.14",
           "Programming Language :: Python :: Implementation :: CPython",
           "Programming Language :: Python :: Implementation :: PyPy",
           "Topic :: Security :: Cryptography",
@@ -65,7 +61,7 @@
       maintainer="Olaf Conradi",
       maintainer_email="olaf@conradi.org",
       license="Public Domain",
-      python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*",
+      python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,!=3.7.*,!=3.8.*",
       platforms=["any"],
       ext_modules=[Extension("whirlpool", ["whirlpool/pywhirlpool.c"],
                              include_dirs=["lib"])],

From c15bc8185d2bd8ac1fc14749df6c5fbeb07343e6 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:54:55 +0200
Subject: [PATCH 08/14] Pypy2 not supported on GH actions

---
 .github/workflows/ci.yml | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 00e843d..b0f8ce5 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,8 +54,6 @@ jobs:
           python-version: '3.14'
         - os: windows-latest
           python-version: '3.14'
-        - os: ubuntu-latest
-          python-version: 'pypy2'
         - os: ubuntu-latest
           python-version: 'pypy3'
 
@@ -64,7 +62,6 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up Python ${{ matrix.python-version }}
-      if: matrix.python-version != 'pypy2'
       uses: actions/setup-python@v5
       with:
         python-version: ${{ matrix.python-version }}
@@ -73,17 +70,6 @@ jobs:
           setup.py
           tox.ini
 
-    - name: Install PyPy2 from source
-      if: matrix.python-version == 'pypy2'
-      run: |
-        sudo apt-get update
-        sudo apt-get install -y build-essential libbz2-dev libffi-dev libssl-dev libsqlite3-dev zlib1g-dev libncurses5-dev libgdbm-dev libc6-dev tk-dev libreadline-dev liblzma-dev
-        git clone --depth 1 https://github.com/pypy/pypy.git /tmp/pypy2
-        cd /tmp/pypy2
-        python3 ./rpython/bin/rpython --version || true
-        echo "PyPy2 provisioning is not supported by the GitHub-hosted runner image; this job is expected to fail unless a compatible toolchain is available."
-        exit 1
-
     - name: Install build dependencies
       run: |
         python -m pip install --upgrade pip setuptools wheel

From 346b8b92a44735307d67269e1a2a57b821700ae7 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 13:57:17 +0200
Subject: [PATCH 09/14] Adjust pypy3 on GH actions

---
 .github/workflows/ci.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index b0f8ce5..ee2b6ec 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -55,7 +55,7 @@ jobs:
         - os: windows-latest
           python-version: '3.14'
         - os: ubuntu-latest
-          python-version: 'pypy3'
+          python-version: 'pypy-3.10'
 
     steps:
     - name: Check out repository

From c894477cd0b96ab08cb07bfe52012378c81a5ea7 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 14:03:03 +0200
Subject: [PATCH 10/14] Fix typo in test block size

Checked the wrong variable
---
 test/test_whirlpool.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/test_whirlpool.py b/test/test_whirlpool.py
index 88e7ebb..15b41b0 100644
--- a/test/test_whirlpool.py
+++ b/test/test_whirlpool.py
@@ -118,7 +118,7 @@ def test_block_size(self):
         wp = whirlpool.new()
         self.assertEqual(wp.block_size, 64)
         with self.assertRaises((AttributeError, TypeError)):
-            wp.digest_size = 32
+            wp.block_size = 32
 
 
 if __name__ == '__main__':

From af03973fc1fe37d4dd2ffb872674ed6bef86050a Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 14:06:04 +0200
Subject: [PATCH 11/14] Update documentation

---
 README.md | 15 +++++++--------
 1 file changed, 7 insertions(+), 8 deletions(-)

diff --git a/README.md b/README.md
index 1690090..4f35a64 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,6 @@
 # python-whirlpool
 
-[![Travis CI Build Status](https://travis-ci.org/oohlaf/python-whirlpool.svg?branch=master)](https://travis-ci.org/oohlaf/python-whirlpool)
-[![AppVeyor Build Status](https://ci.appveyor.com/api/projects/status/pw35grm8ald8lg22/branch/master?svg=true)](https://ci.appveyor.com/project/oohlaf/python-whirlpool/branch/master)
+[![CI](https://github.com/oohlaf/python-whirlpool/actions/workflows/ci.yml/badge.svg)](https://github.com/oohlaf/python-whirlpool/actions/workflows/ci.yml)
 [![License: Unlicense](https://img.shields.io/badge/license-Unlicense-blue.svg)](http://unlicense.org/)
 
 The [Whirlpool] algorithm is designed by Vincent Rijmen and Paulo S.L.M. Barreto.
@@ -56,19 +55,19 @@ The source code is available on [GitHub].
 
 Install in development mode using:
 
-    python setup.py develop
-
-Or install in editable mode using pip:
-
     pip install -e .
 
 ## Testing
 
 This module is tested using Python 2.7, PyPy, and Python 3.9 and up.
 
-You can run the test suite using:
+You can run the test suite locally with:
+
+    python -m unittest discover -s test -p 'test_*.py'
+
+For a multi-version local test matrix, you can also use:
 
-    python setup.py test
+    tox
 
 [Whirlpool]: https://en.wikipedia.org/wiki/Whirlpool_(cryptography)
 [NESSIE]: https://www.cosic.esat.kuleuven.be/nessie/

From f7b95d7a85ff1a2a21b41dc7a3ae7f27c7934032 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 14:28:58 +0200
Subject: [PATCH 12/14] PEP 517-style build configuration via pyproject.toml

---
 CHANGELOG.md   | 6 ++++--
 pyproject.toml | 3 +++
 2 files changed, 7 insertions(+), 2 deletions(-)
 create mode 100644 pyproject.toml

diff --git a/CHANGELOG.md b/CHANGELOG.md
index dd807b4..dfbed1f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -9,11 +9,13 @@ project adheres to [Semantic Versioning][semver].
 ### Added
 
 - Support for Python 3.11, 3.12, 3.13 and 3.14.
+- PEP 517-style build configuration via pyproject.toml.
 
 ### Changed
 
-- Included newer Python versions in CI scripting up to Python 3.10
-- Now also builds on PyPy3
+- Included newer Python versions in CI scripting up to Python 3.10.
+- Now also builds on PyPy3.
+- Fix unit test for block size.
 
 ## [1.0.0] (2018-02-19)
 
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000..4a85092
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=61", "wheel"]
+build-backend = "setuptools.build_meta"

From 6fdf02dea406f9bfb8bb0a1453ac4e51db7343a7 Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 14:34:04 +0200
Subject: [PATCH 13/14] Smoke test built artifacts

---
 .github/workflows/ci.yml | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ee2b6ec..d1f1e61 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -124,6 +124,14 @@ jobs:
         python -m pip install --upgrade pip build
         python -m build
 
+    - name: Smoke test built artifacts
+      run: |
+        python -m venv .venv-smoke
+        . .venv-smoke/bin/activate
+        python -m pip install --upgrade pip
+        python -m pip install dist/*.whl
+        python -m unittest discover -s test -p 'test_*.py'
+
     - name: Upload build artifacts
       uses: actions/upload-artifact@v4
       with:

From 89b7d4a03c50cd7a6d954f31180d3a3cd4b0c0dc Mon Sep 17 00:00:00 2001
From: Olaf Conradi <olaf@conradi.org>
Date: Sun, 28 Jun 2026 14:53:34 +0200
Subject: [PATCH 14/14] Move metadata to pyproject.toml

---
 pyproject.toml | 45 ++++++++++++++++++++++++++++++-
 setup.py       | 73 +++++---------------------------------------------
 2 files changed, 50 insertions(+), 68 deletions(-)

diff --git a/pyproject.toml b/pyproject.toml
index 4a85092..124934a 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,3 +1,46 @@
 [build-system]
-requires = ["setuptools>=61", "wheel"]
+requires = [
+    "setuptools>=61; python_version>='3.7'",
+    "setuptools<45; python_version<'3.7'",
+    "wheel",
+]
 build-backend = "setuptools.build_meta"
+
+[project]
+name = "Whirlpool"
+version = "1.0.1.dev0"
+description = "Bindings for whirlpool hash reference implementation."
+readme = { file = "README.md", content-type = "text/markdown" }
+requires-python = ">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,!=3.7.*,!=3.8.*"
+license = { text = "Public Domain" }
+authors = [{ name = "Olaf Conradi", email = "olaf@conradi.org" }]
+keywords = ["digest", "hashlib", "whirlpool"]
+classifiers = [
+    "Development Status :: 5 - Production/Stable",
+    "Intended Audience :: Developers",
+    "License :: Public Domain",
+    "Programming Language :: C",
+    "Programming Language :: Python",
+    "Programming Language :: Python :: 2",
+    "Programming Language :: Python :: 2.7",
+    "Programming Language :: Python :: 3",
+    "Programming Language :: Python :: 3.9",
+    "Programming Language :: Python :: 3.10",
+    "Programming Language :: Python :: 3.11",
+    "Programming Language :: Python :: 3.12",
+    "Programming Language :: Python :: 3.13",
+    "Programming Language :: Python :: 3.14",
+    "Programming Language :: Python :: Implementation :: CPython",
+    "Programming Language :: Python :: Implementation :: PyPy",
+    "Topic :: Security :: Cryptography",
+    "Topic :: Software Development :: Libraries :: Python Modules",
+]
+
+[project.urls]
+Homepage = "https://github.com/oohlaf/python-whirlpool"
+Repository = "https://github.com/oohlaf/python-whirlpool"
+Changelog = "https://github.com/oohlaf/python-whirlpool/blob/master/CHANGELOG.md"
+
+[tool.setuptools]
+packages = []
+include-package-data = false
diff --git a/setup.py b/setup.py
index c066ab3..47b9220 100755
--- a/setup.py
+++ b/setup.py
@@ -1,70 +1,9 @@
 """Whirlpool: Bindings for whirlpool hash reference implementation."""
-import os
-import sys
-
 from setuptools import setup, Extension
 
-if sys.version_info.major < 3:
-    from io import open
-
-
-VERSION = '1.0.1.dev0'
-GITHUB_URL = 'https://github.com/oohlaf/python-whirlpool'
-DOWNLOAD_URL = '{}/archive/{}.zip'.format(GITHUB_URL, VERSION)
-
-DOCLINES = __doc__.strip().split('\n')
-
-HERE = os.path.abspath(os.path.dirname(__file__))
-with open(os.path.join(HERE, 'README.md'), encoding='utf-8') as f:
-    README = '\n' + f.read()
-with open(os.path.join(HERE, 'CHANGELOG.md'), encoding='utf-8') as f:
-    CHANGELOG = '\n' + f.read()
-LONG_DESC = README + '\n' + CHANGELOG
-
-
-try:
-    import pypandoc
-    LONG_DESC = pypandoc.convert_text(LONG_DESC, 'rst', format='markdown')
-    LONG_DESC_CTYPE = 'text/x-rst'
-except (IOError, ImportError):
-    LONG_DESC_CTYPE = 'text/markdown'
-
-
-setup(name="Whirlpool",
-      version=VERSION,
-      description=DOCLINES[0],
-      long_description=LONG_DESC,
-      long_description_content_type=LONG_DESC_CTYPE,
-      classifiers=[
-          "Development Status :: 5 - Production/Stable",
-          "Intended Audience :: Developers",
-          "License :: Public Domain",
-          "Programming Language :: C",
-          "Programming Language :: Python",
-          "Programming Language :: Python :: 2",
-          "Programming Language :: Python :: 2.7",
-          "Programming Language :: Python :: 3",
-          "Programming Language :: Python :: 3.9",
-          "Programming Language :: Python :: 3.10",
-          "Programming Language :: Python :: 3.11",
-          "Programming Language :: Python :: 3.12",
-          "Programming Language :: Python :: 3.13",
-          "Programming Language :: Python :: 3.14",
-          "Programming Language :: Python :: Implementation :: CPython",
-          "Programming Language :: Python :: Implementation :: PyPy",
-          "Topic :: Security :: Cryptography",
-          "Topic :: Software Development :: Libraries :: Python Modules",
-          ],
-      keywords="digest hashlib whirlpool",
-      url=GITHUB_URL,
-      download_url=DOWNLOAD_URL,
-      maintainer="Olaf Conradi",
-      maintainer_email="olaf@conradi.org",
-      license="Public Domain",
-      python_requires=">=2.7,!=3.0.*,!=3.1.*,!=3.2.*,!=3.3.*,!=3.4.*,!=3.5.*,!=3.6.*,!=3.7.*,!=3.8.*",
-      platforms=["any"],
-      ext_modules=[Extension("whirlpool", ["whirlpool/pywhirlpool.c"],
-                             include_dirs=["lib"])],
-      data_files=[("whirlpool", ['lib/nessie.h', "lib/Whirlpool.c"])],
-      test_suite="test"
-     )
+setup(
+    version='1.0.1.dev0',
+    ext_modules=[Extension('whirlpool', ['whirlpool/pywhirlpool.c'], include_dirs=['lib'])],
+    data_files=[('whirlpool', ['lib/nessie.h', 'lib/Whirlpool.c'])],
+    test_suite='test',
+)