Add more Pulp Exceptions.

CHANGES/+add-pulp-exceptions.bugfix

@@ -0,0 +1 @@
+Add more Pulp Exceptions.

pulp_python/app/exceptions.py

@@ -0,0 +1,88 @@
+from gettext import gettext as _
+
+from pulpcore.plugin.exceptions import PulpException
+
+
+class ProvenanceVerificationError(PulpException):
+    """
+    Raised when provenance verification fails.
+    """
+
+    error_code = "PLPY0001"
+
+    def __init__(self, message):
+        """
+        :param message: Description of the provenance verification error
+        :type message: str
+        """
+        self.message = message
+
+    def __str__(self):
+        return f"[{self.error_code}] " + _("Provenance verification failed: {message}").format(
+            message=self.message
+        )
+
+
+class AttestationVerificationError(PulpException):
+    """
+    Raised when attestation verification fails.
+    """
+
+    error_code = "PLPY0002"
+
+    def __init__(self, message):
+        """
+        :param message: Description of the attestation verification error
+        :type message: str
+        """
+        self.message = message
+
+    def __str__(self):
+        return f"[{self.error_code}] " + _("Attestation verification failed: {message}").format(
+            message=self.message
+        )
+
+
+class PackageSubstitutionError(PulpException):
+    """
+    Raised when packages with the same filename but different checksums are being added.
+    """
+
+    error_code = "PLPY0003"
+
+    def __init__(self, duplicates):
+        """
+        :param duplicates: Description of duplicate packages
+        :type duplicates: str
+        """
+        self.duplicates = duplicates
+
+    def __str__(self):
+        return (
+            f"[{self.error_code}] "
+            + _(
+                "Found duplicate packages being added with the same filename but different checksums. "  # noqa: E501
+            )
+            + _("To allow this, set 'allow_package_substitution' to True on the repository. ")
+            + _("Conflicting packages: {duplicates}").format(duplicates=self.duplicates)
+        )
+
+
+class UnsupportedProtocolError(PulpException):
+    """
+    Raised when an unsupported protocol is used for syncing.
+    """
+
+    error_code = "PLPY0004"
+
+    def __init__(self, protocol):
+        """
+        :param protocol: The unsupported protocol
+        :type protocol: str
+        """
+        self.protocol = protocol
+
+    def __str__(self):
+        return f"[{self.error_code}] " + _(
+            "Only HTTP(S) is supported for python syncing, got: {protocol}"
+        ).format(protocol=self.protocol)

pulp_python/app/models.py

@@ -11,7 +11,6 @@
     BEFORE_SAVE,
     hook,
 )
-from rest_framework.serializers import ValidationError
 from pulpcore.plugin.models import (
     AutoAddObjPermsMixin,
     Content,
@@ -23,6 +22,7 @@
 from pulpcore.plugin.responses import ArtifactResponse
 
 from pathlib import PurePath
+from .exceptions import PackageSubstitutionError
 from .provenance import Provenance
 from .utils import (
     artifact_to_python_content_data,
@@ -407,14 +407,10 @@ def finalize_new_version(self, new_version):
 
     def _check_for_package_substitution(self, new_version):
         """
-        Raise a ValidationError if newly added packages would replace existing packages that have
-        the same filename but a different sha256 checksum.
+        Raise a PackageSubstitutionError if newly added packages would replace existing packages
+        that have the same filename but a different sha256 checksum.
         """
         qs = PythonPackageContent.objects.filter(pk__in=new_version.content)
         duplicates = collect_duplicates(qs, ("filename",))
         if duplicates:
-            raise ValidationError(
-                "Found duplicate packages being added with the same filename but different checksums. "  # noqa: E501
-                "To allow this, set 'allow_package_substitution' to True on the repository. "
-                f"Conflicting packages: {duplicates}"
-            )
+            raise PackageSubstitutionError(duplicates)

pulp_python/app/serializers.py

@@ -8,14 +8,16 @@
 from packaging.requirements import Requirement
 from rest_framework import serializers
 from pypi_attestations import AttestationError
-from pydantic import TypeAdapter, ValidationError
+from pydantic import TypeAdapter, ValidationError as PydanticValidationError
 from urllib.parse import urljoin
 
+from pulpcore.plugin.exceptions import DigestValidationError, ValidationError
 from pulpcore.plugin import models as core_models
 from pulpcore.plugin import serializers as core_serializers
 from pulpcore.plugin.util import get_domain, get_prn, get_current_authenticated_user
 
 from pulp_python.app import models as python_models
+from pulp_python.app.exceptions import AttestationVerificationError, ProvenanceVerificationError
 from pulp_python.app.provenance import (
     Attestation,
     Provenance,
@@ -374,7 +376,7 @@ def validate_attestations(self, value):
                 attestations = TypeAdapter(list[Attestation]).validate_json(value)
             else:
                 attestations = TypeAdapter(list[Attestation]).validate_python(value)
-        except ValidationError as e:
+        except PydanticValidationError as e:
             raise serializers.ValidationError(_("Invalid attestations: {}".format(e)))
         return attestations
 
@@ -387,9 +389,7 @@ def handle_attestations(self, filename, sha256, attestations, offline=True):
         try:
             verify_provenance(filename, sha256, provenance, offline=offline)
         except AttestationError as e:
-            raise serializers.ValidationError(
-                {"attestations": _("Attestations failed verification: {}".format(e))}
-            )
+            raise AttestationVerificationError(str(e))
         return provenance.model_dump(mode="json")
 
     def deferred_validate(self, data):
@@ -408,26 +408,23 @@ def deferred_validate(self, data):
         try:
             filename = data["relative_path"]
         except KeyError:
-            raise serializers.ValidationError(detail={"relative_path": _("This field is required")})
+            raise ValidationError(_("This field is required: relative_path"))
 
         artifact = data["artifact"]
         try:
             _data = artifact_to_python_content_data(filename, artifact, domain=get_domain())
         except ValueError:
-            raise serializers.ValidationError(
+            raise ValidationError(
                 _(
                     "Extension on {} is not a valid python extension "
                     "(.whl, .exe, .egg, .tar.gz, .tar.bz2, .zip)"
                 ).format(filename)
             )
 
         if data.get("sha256") and data["sha256"] != artifact.sha256:
-            raise serializers.ValidationError(
-                detail={
-                    "sha256": _(
-                        "The uploaded artifact's sha256 checksum does not match the one provided"
-                    )
-                }
+            raise DigestValidationError(
+                actual=artifact.sha256,
+                expected=data["sha256"],
             )
 
         data.update(_data)
@@ -641,15 +638,13 @@ def deferred_validate(self, data):
         try:
             provenance = Provenance.model_validate_json(data["file"].read())
             data["provenance"] = provenance.model_dump(mode="json")
-        except ValidationError as e:
-            raise serializers.ValidationError(
-                _("The uploaded provenance is not valid: {}".format(e))
-            )
+        except PydanticValidationError as e:
+            raise ValidationError(_("The uploaded provenance is not valid: {}".format(e)))
         if data.pop("verify"):
             try:
                 verify_provenance(data["package"].filename, data["package"].sha256, provenance)
             except AttestationError as e:
-                raise serializers.ValidationError(_("Provenance verification failed: {}".format(e)))
+                raise ProvenanceVerificationError(str(e))
         return data
 
     def retrieve(self, validated_data):

pulp_python/app/tasks/sync.py

@@ -17,6 +17,7 @@
     Stage,
 )
 
+from pulp_python.app.exceptions import UnsupportedProtocolError
 from pulp_python.app.models import (
     PythonPackageContent,
     PythonRemote,
@@ -117,7 +118,8 @@ async def run(self):
         url = self.remote.url.rstrip("/")
         downloader = self.remote.get_downloader(url=url)
         if not isinstance(downloader, HttpDownloader):
-            raise ValueError("Only HTTP(S) is supported for python syncing")
+            protocol = type(downloader).__name__
+            raise UnsupportedProtocolError(protocol)
 
         async with Master(url, allow_non_https=True) as master:
             # Replace the session with the remote's downloader session

pulp_python/tests/functional/api/test_attestations.py

@@ -69,7 +69,7 @@ def test_verify_provenance(python_bindings, twine_package, python_content_factor
     with pytest.raises(PulpTaskError) as e:
         monitor_task(provenance.task)
     assert e.value.task.state == "failed"
-    assert "twine-6.2.0-py3-none-any.whl != twine-6.2.0.tar.gz" in e.value.task.error["description"]
+    assert "[PLPY0001]" in e.value.task.error["description"]
 
     # Test creating a provenance without verifying
     provenance = python_bindings.ContentProvenanceApi.create(
@@ -239,4 +239,4 @@ def test_bad_attestation_upload(python_bindings, twine_package, monitor_task):
     with pytest.raises(PulpTaskError) as e:
         monitor_task(task)
     assert e.value.task.state == "failed"
-    assert "Attestations failed verification" in e.value.task.error["description"]
+    assert "[PLPY0002]" in e.value.task.error["description"]

pulp_python/tests/functional/api/test_crud_content_unit.py

@@ -112,7 +112,7 @@ def test_content_crud(
     with pytest.raises(PulpTaskError) as e:
         response = python_bindings.ContentPackagesApi.create(**content_body)
         monitor_task(response.task)
-    msg = "The uploaded artifact's sha256 checksum does not match the one provided"
+    msg = "[PLP0003]"
     assert msg in e.value.task.error["description"]
 
 
@@ -241,6 +241,7 @@ def test_disallow_package_substitution(
             repository=repo.pulp_href, **content_body2
         )
         monitor_task(response.task)
+    assert "[PLPY0003]" in exc.value.task.error["description"]
     assert msg1 in exc.value.task.error["description"]
     assert msg2 in exc.value.task.error["description"]
 
@@ -257,6 +258,7 @@ def test_disallow_package_substitution(
     body = {"add_content_units": [content2.pulp_href], "base_version": repo.latest_version_href}
     with pytest.raises(PulpTaskError) as exc:
         monitor_task(python_bindings.RepositoriesPythonApi.modify(repo.pulp_href, body).task)
+    assert "[PLPY0003]" in exc.value.task.error["description"]
     assert msg1 in exc.value.task.error["description"]
     assert msg2 in exc.value.task.error["description"]