ci/bin: Cache GQL queries

To avoid abusing fd.o Gitlab instance, let's cache API queries that
should have the same response. This will speedup the use of the client
tools as well.

Signed-off-by: Guilherme Gallo <guilherme.gallo@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17791>

.gitlab-ci/bin/gitlab_gql.py

@@ -8,6 +8,7 @@ from pathlib import Path
 from typing import Any, Iterable, Optional, Pattern, Union
 
 import yaml
+from filecache import DAY, filecache
 from gql import Client, gql
 from gql.transport.aiohttp import AIOHTTPTransport
 from graphql import DocumentNode
@@ -57,6 +58,7 @@ class GitlabGQL:
             transport=self._transport, fetch_schema_from_transport=True
         )
 
+    @filecache(DAY)
     def query(
         self, gql_file: Union[Path, str], params: dict[str, Any]
     ) -> dict[str, Any]:
@@ -72,6 +74,9 @@ class GitlabGQL:
         # Execute the query on the transport
         return self.client.execute(query, variable_values=params)
 
+    def invalidate_query_cache(self):
+        self.query._db.clear()
+
 
 def create_job_needs_dag(
     gl_gql: GitlabGQL, params
@@ -121,12 +126,16 @@ def fetch_merged_yaml(gl_gql: GitlabGQL, params) -> dict[Any]:
     content = Path(gitlab_yml_file).read_text()
     params["content"] = content
     raw_response = gl_gql.query("job_details.gql", params)
-    merged_yaml = raw_response["ciConfig"]["mergedYaml"]
-    assert merged_yaml, """
+    if merged_yaml := raw_response["ciConfig"]["mergedYaml"]:
+        return yaml.safe_load(merged_yaml)
+
+    gl_gql.invalidate_query_cache()
+    raise ValueError(
+        """
     Could not fetch any content for merged YAML,
     please verify if the git SHA exists in remote.
-    Maybe you forgot to `git push`?"""
-    return yaml.safe_load(merged_yaml)
+    Maybe you forgot to `git push`?  """
+    )
 
 
 def recursive_fill(job, relationship_field, target_data, acc_data: dict, merged_yaml):

.gitlab-ci/bin/requirements.txt

@@ -1,4 +1,5 @@
 colorama==0.4.5
+filecache==0.81
 gql==3.4.0
 python-gitlab==3.5.0
 ruamel.yaml.clib==0.2.6