updated github workflow action to use python3

.github/workflows/python-publish.yml

@@ -1,39 +1,55 @@
-# This workflow will upload a Python Package using Twine when a release is created
-# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-python#publishing-to-package-registries
-
-# This workflow uses actions that are not certified by GitHub.
-# They are provided by a third-party and are governed by
-# separate terms of service, privacy policy, and support
-# documentation.
-
 name: Upload Python Package git maildiff
 
-on:
-  release:
-    types: [published]
+on: push
 
 permissions:
   contents: read
 
 jobs:
-  deploy:
-
+  build-n-publish:
+    name: Build and publish Python 🐍 distributions 📦 to PyPI
     runs-on: ubuntu-latest
-
     steps:
-    - uses: actions/checkout@v3
-    - name: Set up Python
-      uses: actions/setup-python@v3
+    - uses: actions/checkout@master
+    - name: Set up Python 3.7
+      uses: actions/setup-python@v1
       with:
-        python-version: '3.x'
-    - name: Install dependencies
-      run: |
-        python -m pip install --upgrade pip
-        pip install build
-    - name: Build package
-      run: python -m build
-    - name: Publish package
-      uses: pypa/gh-action-pypi-publish@master
+        python-version: 3.7
+
+    - name: remove old pip
+      run: sudo apt remove python-pip
+
+    - name: wget get-pip.py
+      run:  wget https://bootstrap.pypa.io/get-pip.py
+
+    - name: install pip
+      run: python3 get-pip.py
+
+    - name: setuptools version
+      run: >-
+        python3 -c 
+        "import setuptools; from setuptools import build_meta; print('Build meta: {}'.format(build_meta)); print(setuptools.__version__)"
+
+    - name: Install pypa/build
+      run: >-
+        python3 -m
+        pip install
+        build
+        --user
+
+    - name: Build a binary wheel and a source tarball
+      run: >-
+        python3 -m
+        build
+        --sdist
+        --wheel
+        --outdir dist/
+        .
+  
+    - name: Publish distribution 📦 to PyPI
+      if: startsWith(github.ref, 'refs/tags')
+      uses: pypa/gh-action-pypi-publish@release/v1
       with:
         user: __token__
         password: ${{ secrets.PYPI_API_TOKEN }}
+

ez_setup.py

@@ -70,9 +70,10 @@ def _validate_md5(egg_name, data):
     if egg_name in md5_data:
         digest = md5(data).hexdigest()
         if digest != md5_data[egg_name]:
-            print >>sys.stderr, (
+            print(
                 "md5 validation of %s failed!  (Possible download problem?)"
-                % egg_name
+                % egg_name,
+                file=sys.stderr
             )
             sys.exit(2)
     return data
@@ -103,14 +104,14 @@ def do_download():
         return do_download()       
     try:
         pkg_resources.require("setuptools>="+version); return
-    except pkg_resources.VersionConflict, e:
+    except pkg_resources.VersionConflict as e:
         if was_imported:
-            print >>sys.stderr, (
-            "The required version of setuptools (>=%s) is not available, and\n"
-            "can't be installed while this script is running. Please install\n"
-            " a more recent version first, using 'easy_install -U setuptools'."
-            "\n\n(Currently using %r)"
-            ) % (version, e.args[0])
+            print((
+                "The required version of setuptools (>=%s) is not available, and\n"
+                "can't be installed while this script is running. Please install\n"
+                "a more recent version first, using 'easy_install -U setuptools'."
+                "\n\n(Currently using %r)"
+            ) % (version, e.args[0]), file=sys.stderr)
             sys.exit(2)
     except pkg_resources.DistributionNotFound:
         pass
@@ -159,7 +160,7 @@ def download_setuptools(
             # Read/write all in one block, so we don't create a corrupt file
             # if the download is interrupted.
             data = _validate_md5(egg_name, src.read())
-            dst = open(saveto,"wb"); dst.write(data)
+            dst = open(saveto, "wb"); dst.write(data)
         finally:
             if src: src.close()
             if dst: dst.close()
@@ -216,13 +217,14 @@ def main(argv, version=DEFAULT_VERSION):
                 os.unlink(egg)
     else:
         if setuptools.__version__ == '0.0.1':
-            print >>sys.stderr, (
+            msg = (
             "You have an obsolete version of setuptools installed.  Please\n"
             "remove it from your system entirely before rerunning this script."
             )
+            print(msg, file=sys.stderr)
             sys.exit(2)
 
-    req = "setuptools>="+version
+    req = "setuptools>=" + version
     import pkg_resources
     try:
         pkg_resources.require(req)
@@ -238,8 +240,8 @@ def main(argv, version=DEFAULT_VERSION):
             from setuptools.command.easy_install import main
             main(argv)
         else:
-            print "Setuptools version",version,"or greater has been installed."
-            print '(Run "ez_setup.py -U setuptools" to reinstall or upgrade.)'
+            print("Setuptools version",version,"or greater has been installed.")
+            print('Run "ez_setup.py -U setuptools" to reinstall or upgrade.')
 
 def update_md5(filenames):
     """Update our built-in md5 registry"""
@@ -262,7 +264,7 @@ def update_md5(filenames):
 
     match = re.search("\nmd5_data = {\n([^}]+)}", src)
     if not match:
-        print >>sys.stderr, "Internal error!"
+        print("Internal error!", file=sys.stderr)
         sys.exit(2)
 
     src = src[:match.start(1)] + repl + src[match.end(1):]

setup.cfg

@@ -6,3 +6,6 @@ all_files = 1
 [upload_sphinx]
 upload-dir = docs/build/html
 
+[build-system]
+requires = ["setuptools>=59.6.0"]
+build-backend = "setuptools.build_meta"

setup.py

@@ -1,30 +1,15 @@
-import ez_setup
-ez_setup.use_setuptools()
-# help on python packaging: http://python-packaging.readthedocs.io/en/latest/index.html
-try:
-	from setuptools import setup
-except ImportError:
-	from distutils.core import setup
+import os
+from setuptools import setup
 
-from distutils.core import setup
-from os import path
+def read(fname):
+    return open(os.path.join(os.path.dirname(__file__), fname)).read()
 
-try: # for pip >= 10
-	from pip._internal.req import parse_requirements
-except ImportError: # for pip <= 9.0.3
-	from pip.req import parse_requirements
-try:
-	from pip._internal.download import PipSession
-except ImportError:
-	from pip.download import PipSession
+reqs_path = os.path.join(os.path.dirname(__file__), 'requirements.txt')
 
-install_reqs = list(parse_requirements("requirements.txt", session=PipSession()))
-
-with open('requirements.txt', 'r') as reqh:
+with open(reqs_path, 'r') as reqh:
 	install_reqs = reqh.readlines()
 
-
-v = open(path.join(path.dirname(__file__), 'VERSION'))
+v = open(os.path.join(os.path.dirname(__file__), 'VERSION'))
 VERSION = v.readline().strip()
 v.close()
 
@@ -41,6 +26,7 @@
 	description='Package to email color git diff',
 	long_description=(open('README.md').read()),
 	long_description_content_type='text/markdown',
+	setup_requires=["setuptools>=58.0.4"],
 	install_requires=install_reqs,
 	entry_points={
 	'console_scripts':