Remove deprecated pkg_resources

Author: MetRonnie

bin/version

@@ -21,7 +21,7 @@ import json
 import pathlib
 import sys
 
-from pkg_resources import parse_version
+from packaging.version import Version
 
 
 DUMMY_FORMATS = [
@@ -66,10 +66,7 @@ def ls(args):
 
 def tidy(args):
     # get list of documented versions
-    versions = [
-        parse_version(version)
-        for version in get_formats(args.builddir)
-    ]
+    versions = [Version(version) for version in get_formats(args.builddir)]
 
     # build dictionary of minor versions
     # versions = [<Version('1.0.1')>, <Version('1.0.2')>]
@@ -78,17 +75,14 @@ def tidy(args):
     # }
     minor_versions = {}
     for version in versions:
-        release = version._version.release
-        if len(release) > 2:
-            major_minor = release[:2]
-            if major_minor not in minor_versions:
-                minor_versions[major_minor] = []
-            minor_versions[major_minor].append(version)
+        if len(version.release) > 2:
+            major_minor = version.release[:2]
+            minor_versions.setdefault(major_minor, []).append(version)
 
     # pull out the versions we don't want any more
     # e.g from ['1.0.1', '1.0.2', '1.0.3'] pull out ['1.0.1', '1.0.2']
     tidy = []
-    for major_minor, versions in minor_versions.items():
+    for _major_minor, versions in minor_versions.items():
         if len(versions) > 1:
             versions.sort()
             tidy.extend(versions[:-1])

setup.cfg

@@ -48,6 +48,7 @@ install_requires =
     cylc-sphinx-extensions>=1.4.1
     eralchemy==1.2.*
     hieroglyph>=2.1.0
+    packaging
     setuptools>=50
     sphinx>=7.1, !=7.4.4
     sphinx-copybutton

src/lib/cylc_release.py

@@ -2,7 +2,7 @@
 
 from cylc.flow import __version__
 
-from pkg_resources import parse_version
+from packaging.version import Version
 
 
 def pinned_version(version):
@@ -31,7 +31,7 @@ def pinned_version(version):
         '8.0rc1'
 
     """
-    ver = parse_version(version)
+    ver = Version(version)
     if ver.pre and ver.minor == 0 and ver.micro == 0:
         # special handling of major version pre-releases
         ret = (ver.major, str(ver.minor) + ''.join(map(str, ver.pre)))