feat(service): restore optimized migration check

- handle the GitLab library specific errors.
- fall back to full repository checkout in case of unforseen errors.

fix SwissDataScienceCenter#2546

renku/ui/service/controllers/cache_migrations_check.py

@@ -21,7 +21,7 @@
 from pathlib import Path
 
 from renku.command.migrate import migrations_check
-from renku.core.errors import RenkuException
+from renku.core.errors import AuthenticationError, ProjectNotFound, RenkuException
 from renku.core.util.contexts import click_context
 from renku.ui.service.controllers.api.abstract import ServiceCtrl
 from renku.ui.service.controllers.api.mixins import RenkuOperationMixin
@@ -71,11 +71,15 @@ def renku_op(self):
 
     def to_response(self):
         """Execute controller flow and serialize to service response."""
-        return result_response(self.RESPONSE_SERIALIZER, self.execute_op())
+        if "project_id" in self.context:
+            result = self.execute_op()
+        else:
+            # NOTE: use quick flow but fallback to regular flow in case of unexpected exceptions
+            try:
+                result = self._fast_op_without_cache()
+            except (AuthenticationError, ProjectNotFound):
+                raise
+            except Exception:
+                result = self.execute_op()
 
-        # TODO: Enable this optimization. See https://github.com/SwissDataScienceCenter/renku-python/issues/2546
-        # if "project_id" in self.context:
-        #     # use regular flow using cache
-        #     return result_response(self.RESPONSE_SERIALIZER, self.execute_op())
-        #
-        # return result_response(self.RESPONSE_SERIALIZER, self._fast_op_without_cache())
+        return result_response(self.RESPONSE_SERIALIZER, result)

renku/ui/service/errors.py

@@ -611,7 +611,7 @@ class IntermittentAuthenticationError(ServiceError):
     This may happen for a number of reasons. Triggering a new login will likely fix it.
     """
 
-    code = SVC_ERROR_USER + 30
+    code = SVC_ERROR_INTERMITTENT + 30
     userMessage = "Invalid user credentials. Please try to log out and in again."
     devMessage = "Authentication error. Check the Sentry exception to inspect the headers"
 

renku/ui/service/gateways/gitlab_api_provider.py

@@ -22,13 +22,25 @@
 
 import gitlab
 
+from renku.core import errors
 from renku.core.util.os import delete_file
 from renku.domain_model.git import GitURL
 from renku.ui.service.interfaces.git_api_provider import IGitAPIProvider
 
 
 class GitlabAPIProvider(IGitAPIProvider):
-    """Interface a Git API Provider."""
+    """GitLab API provider abstraction layer.
+
+    Args:
+        paths: List of files to download.
+        target_folder: Folder to use to download the files.
+        remote: Remote repository URL.
+        token: User bearer token.
+        ref: optional reference to checkout,
+    Raises:
+        errors.ProjectNotFound: If the remote URL is not accessible.
+        errors.AuthenticationError: If the bearer token is invalid in any way.
+    """
 
     def download_files_from_api(
         self,
@@ -45,8 +57,22 @@ def download_files_from_api(
         target_folder = Path(target_folder)
 
         git_data = GitURL.parse(remote)
-        gl = gitlab.Gitlab(git_data.instance_url, private_token=token)
-        project = gl.projects.get(f"{git_data.owner}/{git_data.name}")
+        try:
+            gl = gitlab.Gitlab(git_data.instance_url, private_token=token)
+            project = gl.projects.get(f"{git_data.owner}/{git_data.name}")
+        except gitlab.GitlabAuthenticationError:
+            # NOTE: Invalid or expired tokens fail even on public projects. Let's give it a try without tokens
+            try:
+                gl = gitlab.Gitlab(git_data.instance_url)
+                project = gl.projects.get(f"{git_data.owner}/{git_data.name}")
+            except gitlab.GitlabAuthenticationError as e:
+                raise errors.AuthenticationError from e
+            except gitlab.GitlabGetError as e:
+                # NOTE: better to re-raise this as a core error since it's a common case
+                if "project not found" in getattr(e, "error_message", "").lower():
+                    raise errors.ProjectNotFound from e
+                else:
+                    raise
 
         result_paths = []
 

renku/ui/service/views/error_handlers.py

@@ -26,6 +26,7 @@
 from requests import RequestException
 
 from renku.core.errors import (
+    AuthenticationError,
     DatasetExistsError,
     DatasetImageError,
     DockerfileUpdateError,
@@ -35,6 +36,7 @@
     MigrationError,
     MigrationRequired,
     ParameterError,
+    ProjectNotFound,
     RenkuException,
     TemplateMissingReferenceError,
     TemplateUpdateError,
@@ -126,7 +128,7 @@ def decorated_function(*args, **kwargs):
         """Represents decorated function."""
         try:
             return f(*args, **kwargs)
-        except (ExpiredSignatureError, ImmatureSignatureError, InvalidIssuedAtError) as e:
+        except (AuthenticationError, ExpiredSignatureError, ImmatureSignatureError, InvalidIssuedAtError) as e:
             raise IntermittentAuthenticationError(e)
 
     return decorated_function
@@ -392,6 +394,8 @@ def decorated_function(*args, **kwargs):
             raise UserProjectTemplateReferenceError(e)
         except (InvalidTemplateError, TemplateUpdateError) as e:
             raise IntermittentProjectTemplateUnavailable(e)
+        except ProjectNotFound as e:
+            raise UserRepoUrlInvalidError(e)
 
     return decorated_function
 

tests/service/views/test_cache_views.py

@@ -34,6 +34,7 @@
     IntermittentProjectTemplateUnavailable,
     UserAnonymousError,
     UserProjectTemplateReferenceError,
+    UserRepoUrlInvalidError,
 )
 from renku.ui.service.serializers.headers import JWT_TOKEN_SECRET
 from tests.utils import assert_rpc_response, retry_failed
@@ -685,6 +686,19 @@ def test_check_migrations_remote(svc_client, identity_headers, it_remote_repo_ur
     assert response.json["result"]["core_renku_version"]
 
 
+@pytest.mark.service
+@pytest.mark.integration
+def test_check_migrations_remote_errors(svc_client, identity_headers, it_remote_repo_url):
+    """Check if migrations are required for a remote project."""
+
+    # NOTE: repo doesn't exist
+    fake_url = f"{it_remote_repo_url}FAKE_URL"
+    response = svc_client.get("/cache.migrations_check", query_string=dict(git_url=fake_url), headers=identity_headers)
+
+    assert_rpc_response(response, "error")
+    assert UserRepoUrlInvalidError.code == response.json["error"]["code"]
+
+
 @pytest.mark.service
 @pytest.mark.integration
 def test_mirgate_wrong_template_failure(svc_client_with_repo, template, monkeypatch):