feat(ecosystems): support Red Hat fully (#2667)

Red Hat records are not importing as intended, I believe this will
correct that.

osv/ecosystems/_ecosystems.py

@@ -28,6 +28,7 @@
 from .pub import Pub
 from .pypi import PyPI
 from .rocky_linux import RockyLinux
+from .redhat import RedHat
 from .rubygems import RubyGems
 from .semver_ecosystem_helper import SemverEcosystem
 from .ubuntu import Ubuntu
@@ -64,7 +65,6 @@
     'Linux': OrderingUnsupportedEcosystem(),
     'OSS-Fuzz': OrderingUnsupportedEcosystem(),
     'Photon OS': OrderingUnsupportedEcosystem(),
-    'Red Hat': OrderingUnsupportedEcosystem(),
 }
 
 # Semver-based ecosystems, should correspond to _ecosystems above.
@@ -118,6 +118,9 @@ def get(name: str) -> Ecosystem:
   if name.startswith('AlmaLinux'):
     return AlmaLinux()
 
+  if name.startswith('Red Hat'):
+    return RedHat()
+
   if name.startswith('Rocky Linux'):
     return RockyLinux()
 

osv/ecosystems/redhat.py

@@ -0,0 +1,40 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Red Hat Linux ecosystem helper."""
+
+from ..third_party.univers.rpm import RpmVersion
+from .helper_base import Ecosystem
+
+
+class RedHat(Ecosystem):
+  """Red Hat Linux ecosystem"""
+
+  @property
+  def name(self):
+    return 'Red Hat'
+
+  def sort_key(self, version):
+    return RpmVersion.from_string(version)
+
+  def enumerate_versions(self,
+                         package,
+                         introduced,
+                         fixed=None,
+                         last_affected=None,
+                         limits=None):
+    raise NotImplementedError('Ecosystem helper does not support enumeration')
+
+  @property
+  def supports_comparing(self):
+    return True

osv/ecosystems/redhat_test.py

@@ -0,0 +1,36 @@
+# Copyright 2024 Google LLC
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""Red Hat Linux ecosystem helper tests."""
+
+import unittest
+from .. import ecosystems
+
+
+class RedHatEcosystemTest(unittest.TestCase):
+  """Red Hat Linux ecosystem helper tests."""
+
+  def test_redhat(self):
+    """Test sort_key"""
+    ecosystem = ecosystems.get('Red Hat')
+    self.assertEqual('Red Hat', ecosystem.name)
+    self.assertGreater(
+        ecosystem.sort_key('0:0.2.6-20.module+el8.9.0+1420+91577025'),
+        ecosystem.sort_key('0:0.0.99.4-5.module+el8.9.0+1445+07728297'))
+    self.assertGreater(
+        ecosystem.sort_key('0:0.2.6-20.module+el8.9.0+1420+91577025'),
+        ecosystem.sort_key('0'))
+    self.assertGreater(
+        ecosystem.sort_key('2:1.14.3-2.module+el8.10.0+1815+5fe7415e'),
+        ecosystem.sort_key('2:1.10.3-1.module+el8.10.0+1815+5fe7415e'))
+    self.assertLess(ecosystem.sort_key('invalid'), ecosystem.sort_key('0'))

osv/ecosystems/rocky_linux.py

@@ -18,11 +18,11 @@
 
 
 class RockyLinux(Ecosystem):
-  """"Rocky Linux ecosystem"""
+  """Rocky Linux ecosystem"""
 
   @property
   def name(self):
-    return "Rocky Linux"
+    return 'Rocky Linux'
 
   def sort_key(self, version):
     return RpmVersion.from_string(version)