Use deprecated LegacyVersion (_version) only if necessary

LegacyVersion has been removed from Packaging in 2022. If the call
to `parse` function returns LegacyVersion, access to
version._version cannot emit DeprecationWarning.

Fixes: rhbz#2442867

python-rpm-generators.spec

@@ -1,7 +1,7 @@
 Name:           python-rpm-generators
 Summary:        Dependency generators for Python RPMs
 Version:        14
-Release:        14%{?dist}
+Release:        15%{?dist}
 
 Url:            https://src.fedoraproject.org/rpms/python-rpm-generators
 
@@ -56,6 +56,9 @@ install -Dpm0755 -t %{buildroot}%{_rpmconfigdir} *.py
 %{_rpmconfigdir}/pythonbundles.py
 
 %changelog
+* Wed Mar 04 2026 Lumír Balhar <lbala@redhat.com> - 14-15
+- pythondistdeps: Use deprecated LegacyVersion (_version) only if necessary
+
 * Sat Jan 17 2026 Fedora Release Engineering <releng@fedoraproject.org> - 14-14
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild
 

pythondistdeps.py

@@ -133,14 +133,14 @@ class Distribution(PathDistribution):
 class RpmVersion():
     def __init__(self, version_id):
         version = parse(version_id)
-        if isinstance(version._version, str):
+        if version.__class__.__name__ == 'LegacyVersion':
             self.version = version._version
         else:
-            self.epoch = version._version.epoch
-            self.version = list(version._version.release)
-            self.pre = version._version.pre
-            self.dev = version._version.dev
-            self.post = version._version.post
+            self.epoch = version.epoch
+            self.version = list(version.release)
+            self.pre = version.pre
+            self.dev = version.dev
+            self.post = version.post
             # version.local is ignored as it is not expected to appear
             # in public releases
             # https://www.python.org/dev/peps/pep-0440/#local-version-identifiers
@@ -171,9 +171,9 @@ class RpmVersion():
         if self.pre:
             rpm_suffix = '~{}'.format(''.join(str(x) for x in self.pre))
         elif self.dev:
-            rpm_suffix = '~~{}'.format(''.join(str(x) for x in self.dev))
+            rpm_suffix = '~~dev{}'.format(self.dev)
         elif self.post:
-            rpm_suffix = '^post{}'.format(self.post[1])
+            rpm_suffix = '^post{}'.format(self.post)
         else:
             rpm_suffix = ''
         return '{}{}{}'.format(rpm_epoch, rpm_version, rpm_suffix)