add sample job manifest file, API for read-only view of it

snuba/admin/views.py

@@ -72,6 +72,7 @@
     get_writable_storage,
 )
 from snuba.datasets.storages.storage_key import StorageKey
+from snuba.manual_jobs.manifest_reader import read_jobs_manifest
 from snuba.migrations.connect import check_for_inactive_replicas
 from snuba.migrations.errors import InactiveClickhouseReplica, MigrationError
 from snuba.migrations.groups import MigrationGroup, get_group_readiness_state
@@ -1264,3 +1265,9 @@ def delete() -> Response:
 @check_tool_perms(tools=[AdminTools.DELETE_TOOL])
 def deletes_enabled() -> Response:
     return make_response(jsonify(deletes_are_enabled()), 200)
+
+
+@application.route("/job-manifests", methods=["GET"])
+@check_tool_perms(tools=[AdminTools.ALL])
+def get_job_manifests() -> Response:
+    return make_response(jsonify(read_jobs_manifest()), 200)

snuba/manual_jobs/manifest_reader.py

@@ -0,0 +1,17 @@
+import os
+from typing import Any, Sequence
+
+import simplejson
+
+
+class _ManifestReader:
+    def read(filename) -> Sequence[Any]:
+        local_root = os.path.dirname(__file__)
+        with open(os.path.join(local_root, filename)) as stream:
+            contents = simplejson.loads(stream.read())
+            assert isinstance(contents, Sequence)
+            return contents
+
+
+def read_jobs_manifest() -> Sequence[Any]:
+    return _ManifestReader.read("run_manifest.json")

snuba/manual_jobs/run_manifest.json

@@ -0,0 +1 @@
+[{ "id": "abc1234", "job_type": "ToyJob", "params": { "p1": "value1" } }]