Update the preflight checks for publishing to PyPI

Author: mdmintz

setup.py

@@ -30,14 +30,14 @@
     confirm_text = ">>> Confirm release PUBLISH to PyPI? (yes/no): "
     reply = str(input_method(confirm_text)).lower().strip()
     if reply == "yes":
+        if sys.version_info < (3, 9):
+            print("\nERROR! Publishing to PyPI requires Python>=3.9")
+            sys.exit()
         print("\n*** Checking code health with flake8:\n")
-        if sys.version_info >= (3, 9):
-            os.system("python -m pip install 'flake8==6.0.0'")
-        else:
-            os.system("python -m pip install 'flake8==5.0.4'")
+        os.system("python -m pip install 'flake8==6.0.0'")
         flake8_status = os.system("flake8 --exclude=recordings,temp")
         if flake8_status != 0:
-            print("\nWARNING! Fix flake8 issues before publishing to PyPI!\n")
+            print("\nERROR! Fix flake8 issues before publishing to PyPI!\n")
             sys.exit()
         else:
             print("*** No flake8 issues detected. Continuing...")
@@ -48,6 +48,8 @@
         os.system("python -m pip install --upgrade 'build>=0.10.0'")
         print("\n*** Installing pkginfo: *** (Required for PyPI uploads)\n")
         os.system("python -m pip install --upgrade 'pkginfo>=1.9.6'")
+        print("\n*** Installing readme-renderer: *** (For PyPI uploads)\n")
+        os.system("python -m pip install --upgrade 'readme-renderer>=40.0'")
         print("\n*** Installing twine: *** (Required for PyPI uploads)\n")
         os.system("python -m pip install --upgrade 'twine>=4.0.2'")
         print("\n*** Installing tqdm: *** (Required for PyPI uploads)\n")