feat: Implement Hex Enumerable Ecosystem

Author: maennchen

osv/ecosystems/_ecosystems.py

@@ -21,6 +21,7 @@
 from .cran import CRAN
 from .debian import Debian, DPKG
 from .haskell import Hackage, GHC
+from .hex import Hex
 from .maven import Maven
 from .nuget import NuGet
 from .packagist import Packagist
@@ -46,7 +47,7 @@
     'GHC': GHC,
     'Go': SemverEcosystem,
     'Hackage': Hackage,
-    'Hex': SemverEcosystem,
+    'Hex': Hex,
     'Julia': SemverEcosystem,
     'Mageia': RPM,
     'Maven': Maven,

osv/ecosystems/cassettes/HexEcosystemTest.test_enumerate.yaml

@@ -0,0 +1,50 @@
+# Copyright 2025 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.
+"""Hex ecosystem helper."""
+
+import json
+from typing import List
+
+from . import config
+from .ecosystems_base import EnumerableEcosystem, EnumerateError
+from .semver_ecosystem_helper import SemverEcosystem
+from ..request_helper import RequestError, RequestHelper
+
+class Hex(EnumerableEcosystem, SemverEcosystem):
+  """Hex ecosystem"""
+
+  _API_PACKAGE_URL = 'https://hex.pm/api/packages/{package}'
+
+  def enumerate_versions(self,
+                         package,
+                         introduced,
+                         fixed=None,
+                         last_affected=None,
+                         limits=None):
+    url = self._API_PACKAGE_URL.format(package=package.lower())
+    request_helper = RequestHelper(config.shared_cache)
+    try:
+      text_response = request_helper.get(url)
+    except RequestError as ex:
+      if ex.response.status_code == 404:
+        raise EnumerateError(f'Package {package} not found') from ex
+      raise RuntimeError('Failed to get Hex versions for '
+                         f'{package} with: {ex.response.text}') from ex
+
+    response = json.loads(text_response)
+    versions: list[str] = [x['version'] for x in response['releases']]
+    self.sort_versions(versions)
+
+    return self._get_affected_versions(versions, introduced, fixed,
+                                       last_affected, limits)

osv/ecosystems/hex.py

@@ -0,0 +1,37 @@
+# Copyright 2025 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.
+"""Hex ecosystem helper tests."""
+
+import os
+import vcr.unittest
+
+from .. import ecosystems
+
+
+class HexEcosystemTest(vcr.unittest.VCRTestCase):
+  """Hex ecosystem helper tests."""
+  _TEST_DATA_DIR = os.path.join(
+      os.path.dirname(os.path.abspath(__file__)), 'testdata')
+
+  def test_enumerate(self):
+    """Test enumerate."""
+    ecosystem = ecosystems.get('Hex')
+    self.assertEqual(['3.6.3', '3.7.0'],
+                     ecosystem.enumerate_versions(
+                         'ash', '3.6.3',
+                         last_affected='3.7.0'))
+    self.assertEqual(['3.6.3', '3.7.0'],
+                     ecosystem.enumerate_versions(
+                         'ash', '3.6.3',
+                         fixed='3.7.1'))