Replace pgk_resources.parse_version with packaging.version.parse

This removes the final dependency in pkg_resources. Closes #2347.

mkdocs/commands/gh_deploy.py

@@ -2,7 +2,7 @@ import logging
 import subprocess
 import os
 import re
-from pkg_resources import parse_version
+from packaging import version
 
 import mkdocs
 import ghp_import
@@ -65,20 +65,20 @@ def _check_version(branch):
     stdout, _ = proc.communicate()
     msg = stdout.decode('utf-8').strip()
     m = re.search(r'\d+(\.\d+)+((a|b|rc)\d+)?(\.post\d+)?(\.dev\d+)?', msg, re.X | re.I)
-    previousv = parse_version(m.group()) if m else None
-    currentv = parse_version(mkdocs.__version__)
+    previousv = version.parse(m.group()) if m else None
+    currentv = version.parse(mkdocs.__version__)
     if not previousv:
         log.warning('Version check skipped: No version specified in previous deployment.')
     elif currentv > previousv:
         log.info(
-            'Previous deployment was done with MkDocs version {}; '
-            'you are deploying with a newer version ({})'.format(previousv, currentv)
+            f'Previous deployment was done with MkDocs version {previousv}; '
+            f'you are deploying with a newer version ({currentv})'
         )
     elif currentv < previousv:
         log.error(
-            'Deployment terminated: Previous deployment was made with MkDocs version {}; '
-            'you are attempting to deploy with an older version ({}). Use --ignore-version '
-            'to deploy anyway.'.format(previousv, currentv)
+            f'Deployment terminated: Previous deployment was made with MkDocs version {previousv}; '
+            f'you are attempting to deploy with an older version ({currentv}). Use --ignore-version '
+            'to deploy anyway.'
         )
         raise SystemExit(1)
 

requirements/project-min.txt

@@ -9,3 +9,4 @@ ghp-import==1.0
 pyyaml_env_tag==0.1
 mkdocs-redirects==1.0.1
 importlib_metadata==3.10.0
+packaging==20.5

requirements/project.txt

@@ -9,3 +9,4 @@ ghp-import>=1.0
 pyyaml_env_tag>=0.1
 mkdocs-redirects>=1.0.1
 importlib_metadata>=3.10
+packaging>=20.5

setup.py

@@ -60,7 +60,8 @@ setup(
         'tornado>=5.0',
         'ghp-import>=1.0',
         'pyyaml_env_tag>=0.1',
-        'importlib_metadata>=3.10'
+        'importlib_metadata>=3.10',
+        'packaging>=20.5'
     ],
     python_requires='>=3.6',
     entry_points={