chore: migrate to owl bot (googleapis#663)

* chore: migrate to owl bot

* chore: copy files from googleapis-gen f2de93abafa306b2ebadf1d10d947db8bcf2bf15

* chore: run the post processor

.github/.OwlBot.lock.yaml

@@ -0,0 +1,4 @@
+docker:
+  digest: sha256:457583330eec64daa02aeb7a72a04d33e7be2428f646671ce4045dcbc0191b1e
+  image: gcr.io/repo-automation-bots/owlbot-python:latest  
+

.github/.OwlBot.yaml

@@ -0,0 +1,26 @@
+# Copyright 2021 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.
+
+docker:
+  image: gcr.io/repo-automation-bots/owlbot-python:latest
+
+deep-remove-regex:
+  - /owl-bot-staging
+
+deep-copy-regex:
+  - source: /google/cloud/bigquery/(v.*)/.*-py/(.*)
+    dest: /owl-bot-staging/$1/$2
+
+begin-after-commit-hash: f2de93abafa306b2ebadf1d10d947db8bcf2bf15
+

.pre-commit-config.yaml

@@ -26,6 +26,6 @@ repos:
     hooks:
     - id: black
 -   repo: https://gitlab.com/pycqa/flake8
-    rev: 3.9.0
+    rev: 3.9.1
     hooks:
     - id: flake8

CONTRIBUTING.rst

@@ -160,21 +160,7 @@ Running System Tests
   auth settings and change some configuration in your project to
   run all the tests.
 
-- System tests will be run against an actual project and
-  so you'll need to provide some environment variables to facilitate
-  authentication to your project:
-
-  - ``GOOGLE_APPLICATION_CREDENTIALS``: The path to a JSON key file;
-    Such a file can be downloaded directly from the developer's console by clicking
-    "Generate new JSON key". See private key
-    `docs <https://cloud.google.com/storage/docs/authentication#generating-a-private-key>`__
-    for more details.
-
-- Once you have downloaded your json keys, set the environment variable 
-  ``GOOGLE_APPLICATION_CREDENTIALS`` to the absolute path of the json file::
-
-   $ export GOOGLE_APPLICATION_CREDENTIALS="/Users/<your_username>/path/to/app_credentials.json"
-
+- System tests will be run against an actual project. You should use local credentials from gcloud when possible. See `Best practices for application authentication <https://cloud.google.com/docs/authentication/best-practices-applications#local_development_and_testing_with_the>`__. Some tests require a service account. For those tests see `Authenticating as a service account <https://cloud.google.com/docs/authentication/production>`__.
 
 *************
 Test Coverage

synth.py → owlbot.py

@@ -19,36 +19,61 @@
 from synthtool import gcp
 from synthtool.languages import python
 
-gapic = gcp.GAPICBazel()
 common = gcp.CommonTemplates()
-version = "v2"
 
-library = gapic.py_library(
-    service="bigquery",
-    version=version,
-    bazel_target=f"//google/cloud/bigquery/{version}:bigquery-{version}-py",
-    include_protos=True,
-)
-
-s.move(
-    library,
-    excludes=[
-        "*.tar.gz",
-        "docs/index.rst",
-        "docs/bigquery_v2/*_service.rst",
-        "docs/bigquery_v2/services.rst",
-        "README.rst",
-        "noxfile.py",
-        "setup.py",
-        "scripts/fixup_bigquery_v2_keywords.py",
-        library / f"google/cloud/bigquery/__init__.py",
-        library / f"google/cloud/bigquery/py.typed",
-        # There are no public API endpoints for the generated ModelServiceClient,
-        # thus there's no point in generating it and its tests.
-        library / f"google/cloud/bigquery_{version}/services/**",
-        library / f"tests/unit/gapic/bigquery_{version}/**",
-    ],
-)
+default_version = "v2"
+
+for library in s.get_staging_dirs(default_version):
+    # Do not expose ModelServiceClient, as there is no public API endpoint for the
+    # models service.
+    s.replace(
+        library / f"google/cloud/bigquery_{library.name}/__init__.py",
+        r"from \.services\.model_service import ModelServiceClient",
+        "",
+    )
+    s.replace(
+        library / f"google/cloud/bigquery_{library.name}/__init__.py",
+        r"""["']ModelServiceClient["'],""",
+        "",
+    )
+
+    # Adjust Model docstring so that Sphinx does not think that "predicted_" is
+    # a reference to something, issuing a false warning.
+    s.replace(
+        library / f"google/cloud/bigquery_{library.name}/types/model.py",
+        r'will have a "predicted_"',
+        "will have a `predicted_`",
+    )
+
+    # Avoid breaking change due to change in field renames.
+    # https://github.com/googleapis/python-bigquery/issues/319
+    s.replace(
+        library / f"google/cloud/bigquery_{library.name}/types/standard_sql.py",
+        r"type_ ",
+        "type "
+    )
+
+    s.move(
+        library,
+        excludes=[
+            "*.tar.gz",
+            "docs/index.rst",
+            f"docs/bigquery_{library.name}/*_service.rst",
+            f"docs/bigquery_{library.name}/services.rst",
+            "README.rst",
+            "noxfile.py",
+            "setup.py",
+            f"scripts/fixup_bigquery_{library.name}_keywords.py",
+            f"google/cloud/bigquery/__init__.py",
+            f"google/cloud/bigquery/py.typed",
+            # There are no public API endpoints for the generated ModelServiceClient,
+            # thus there's no point in generating it and its tests.
+            f"google/cloud/bigquery_{library.name}/services/**",
+            f"tests/unit/gapic/bigquery_{library.name}/**",
+        ],
+    )
+
+s.remove_staging_dirs()
 
 # ----------------------------------------------------------------------------
 # Add templated files
@@ -79,41 +104,12 @@
 
 python.py_samples()
 
-# Do not expose ModelServiceClient, as there is no public API endpoint for the
-# models service.
-s.replace(
-    "google/cloud/bigquery_v2/__init__.py",
-    r"from \.services\.model_service import ModelServiceClient",
-    "",
-)
-s.replace(
-    "google/cloud/bigquery_v2/__init__.py",
-    r"""["']ModelServiceClient["'],""",
-    "",
-)
-
-# Adjust Model docstring so that Sphinx does not think that "predicted_" is
-# a reference to something, issuing a false warning.
-s.replace(
-    "google/cloud/bigquery_v2/types/model.py",
-    r'will have a "predicted_"',
-    "will have a `predicted_`",
-)
-
 s.replace(
     "docs/conf.py",
     r'\{"members": True\}',
     '{"members": True, "inherited-members": True}'
 )
 
-# Avoid breaking change due to change in field renames.
-# https://github.com/googleapis/python-bigquery/issues/319
-s.replace(
-  "google/cloud/bigquery_v2/types/standard_sql.py",
-  r"type_ ",
-  "type "
-)
-
 # Tell Sphinx to ingore autogenerated docs files.
 s.replace(
     "docs/conf.py",