feat: Stage 3-4 of nox implementation - adding auto-format targets

django_spanner/base.py

@@ -81,9 +81,7 @@ class DatabaseWrapper(BaseDatabaseWrapper):
     # expression or the result of a bilateral transformation). In those cases,
     # special characters for REGEXP_CONTAINS operators (e.g. \, *, _) must be
     # escaped on database side.
-    pattern_esc = (
-        r'REPLACE(REPLACE(REPLACE({}, "\\", "\\\\"), "%%", r"\%%"), "_", r"\_")'
-    )
+    pattern_esc = r'REPLACE(REPLACE(REPLACE({}, "\\", "\\\\"), "%%", r"\%%"), "_", r"\_")'
     # These are all no-ops in favor of using REGEXP_CONTAINS in the customized
     # lookups.
     pattern_ops = {

django_spanner/compiler.py

@@ -7,15 +7,9 @@
 from django.core.exceptions import EmptyResultSet
 from django.db.models.sql.compiler import (
     SQLAggregateCompiler as BaseSQLAggregateCompiler,
-)
-from django.db.models.sql.compiler import SQLCompiler as BaseSQLCompiler
-from django.db.models.sql.compiler import (
+    SQLCompiler as BaseSQLCompiler,
     SQLDeleteCompiler as BaseSQLDeleteCompiler,
-)
-from django.db.models.sql.compiler import (
     SQLInsertCompiler as BaseSQLInsertCompiler,
-)
-from django.db.models.sql.compiler import (
     SQLUpdateCompiler as BaseSQLUpdateCompiler,
 )
 from django.db.utils import DatabaseError

django_spanner/introspection.py

@@ -95,7 +95,7 @@ def get_relations(self, cursor, table_name):
                 rc.UNIQUE_CONSTRAINT_NAME = ccu.CONSTRAINT_NAME
             WHERE
                 tc.TABLE_NAME="%s"'''
-            % self.connection.ops.quote_name(table_name),
+            % self.connection.ops.quote_name(table_name)
         )
         return {
             column: (referred_column, referred_table)
@@ -116,7 +116,7 @@ def get_primary_key_column(self, cursor, table_name):
             WHERE
                 tc.TABLE_NAME="%s" AND tc.CONSTRAINT_TYPE='PRIMARY KEY' AND tc.TABLE_SCHEMA=''
             """
-            % self.connection.ops.quote_name(table_name),
+            % self.connection.ops.quote_name(table_name)
         )
         return results[0][0] if results else None
 
@@ -133,7 +133,7 @@ def get_constraints(self, cursor, table_name):
                 INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE
                WHERE TABLE_NAME="{table}"'''.format(
                 table=quoted_table_name
-            ),
+            )
         )
         for constraint, column_name in constraint_columns:
             if constraint not in constraints:
@@ -160,7 +160,7 @@ def get_constraints(self, cursor, table_name):
             WHERE
                 TABLE_NAME="{table}"'''.format(
                 table=quoted_table_name
-            ),
+            )
         )
         for constraint, constraint_type in constraint_types:
             already_added = constraint in constraints
@@ -208,7 +208,7 @@ def get_constraints(self, cursor, table_name):
                 idx_col.ORDINAL_POSITION
             """.format(
                 table=quoted_table_name
-            ),
+            )
         )
         for (
             index_name,

django_spanner/operations.py

@@ -16,15 +16,11 @@
 from django.db.utils import DatabaseError
 from django.utils import timezone
 from django.utils.duration import duration_microseconds
-
 from spanner_dbapi.parse_utils import DateStr, TimestampStr, escape_name
 
 
 class DatabaseOperations(BaseDatabaseOperations):
-    cast_data_types = {
-        "CharField": "STRING",
-        "TextField": "STRING",
-    }
+    cast_data_types = {"CharField": "STRING", "TextField": "STRING"}
     cast_char_field_without_max_length = "STRING"
     compiler_module = "django_spanner.compiler"
     # Django's lookup names that require a different name in Spanner's
@@ -247,8 +243,7 @@ def datetime_cast_time_sql(self, field_name, tzname):
         # TIMESTAMP to another time zone.
         return (
             "TIMESTAMP(FORMAT_TIMESTAMP("
-            "'%%Y-%%m-%%d %%R:%%E9S %%Z', %s, '%s'))"
-            % (field_name, tzname,)
+            "'%%Y-%%m-%%d %%R:%%E9S %%Z', %s, '%s'))" % (field_name, tzname)
         )
 
     def date_interval_sql(self, timedelta):

django_spanner/schema.py

@@ -75,7 +75,7 @@ def create_model(self, model):
                     )
             # Add the SQL to our big list
             column_sqls.append(
-                "%s %s" % (self.quote_name(field.column), definition,)
+                "%s %s" % (self.quote_name(field.column), definition)
             )
             # Create a unique constraint separately because Spanner doesn't
             # allow them inline on a column.
@@ -279,7 +279,7 @@ def _alter_field(
         nullability_changed = old_field.null != new_field.null
         if nullability_changed:
             index_names = self._constraint_names(
-                model, [old_field.column], index=True,
+                model, [old_field.column], index=True
             )
             if index_names and not old_field.db_index:
                 raise NotSupportedError(

django_spanner/utils.py

@@ -15,6 +15,6 @@ def check_django_compatability():
         raise ImproperlyConfigured(
             "You must use the latest version of django-spanner {A}.{B}.x "
             "with Django {A}.{B}.y (found django-spanner {C}).".format(
-                A=django.VERSION[0], B=django.VERSION[1], C=__version__,
+                A=django.VERSION[0], B=django.VERSION[1], C=__version__
             )
         )

docs/conf.py

@@ -350,7 +350,10 @@
 intersphinx_mapping = {
     "python": ("http://python.readthedocs.org/en/latest/", None),
     "google-auth": ("https://google-auth.readthedocs.io/en/stable", None),
-    "google.api_core": ("https://googleapis.dev/python/google-api-core/latest/", None),
+    "google.api_core": (
+        "https://googleapis.dev/python/google-api-core/latest/",
+        None,
+    ),
     "grpc": ("https://grpc.io/grpc/python/", None),
 }
 

noxfile.py

@@ -14,6 +14,52 @@
 import shutil
 
 
+BLACK_VERSION = "black==19.10b0"
+BLACK_PATHS = [
+    "django_spanner",
+    "docs",
+    "spanner_dbapi",
+    "tests",
+    "noxfile.py",
+    "setup.py",
+]
+
+
+@nox.session(python="3.8")
+def lint(session):
+    """Run linters.
+
+    Returns a failure if the linters find linting errors or sufficiently
+    serious code quality issues.
+    """
+    session.install("flake8", BLACK_VERSION)
+    session.run("black", "--check", *BLACK_PATHS)
+    session.run("flake8", "django_spanner", "spanner_dbapi", "tests")
+
+
+@nox.session(python="3.8")
+def blacken(session):
+    """Run black.
+
+    Format code to uniform standard.
+
+    This currently uses Python 3.6 due to the automated Kokoro run of synthtool.
+    That run uses an image that doesn't have 3.6 installed. Before updating this
+    check the state of the `gcp_ubuntu_config` we use for that Kokoro run.
+    """
+    session.install(BLACK_VERSION)
+    session.run("black", *BLACK_PATHS)
+
+
+@nox.session(python="3.8")
+def lint_setup_py(session):
+    """Verify that setup.py is valid (including RST check)."""
+    session.install("docutils", "pygments")
+    session.run(
+        "python", "setup.py", "check", "--restructuredtext", "--strict"
+    )
+
+
 def default(session):
     # Install all test dependencies, then install this package in-place.
     session.install("mock", "pytest", "pytest-cov")
@@ -24,7 +70,7 @@ def default(session):
         "py.test",
         "--quiet",
         os.path.join("tests", "spanner_dbapi"),
-        *session.posargs,
+        *session.posargs
     )
 
 

setup.cfg

@@ -5,6 +5,15 @@ ignore =
   W503  # allow line breaks before binary ops
   W504  # allow line breaks after binary ops
   E203  # allow whitespace before ':' (https://github.com/psf/black#slices)
+exclude =
+  # Exclude generated code.
+  **/_build/**
+
+  # Standard linting exemptions.
+  __pycache__,
+  .git,
+  *.pyc,
+  conf.py
 
 [isort]
 use_parentheses = True

setup.py

@@ -19,10 +19,7 @@
 # 'Development Status :: 4 - Beta'
 # 'Development Status :: 5 - Production/Stable'
 release_status = "Development Status :: 3 - Alpha"
-dependencies = [
-    'sqlparse >= 0.3.0',
-    'google-cloud-spanner >= 1.8.0',
-]
+dependencies = ["sqlparse >= 0.3.0", "google-cloud-spanner >= 1.8.0"]
 extras = {}
 
 
@@ -36,30 +33,30 @@
 
 
 setup(
-        name=name,
-        version=version,
-        description=description,
-        long_description=readme,
-        author='Google LLC',
-        author_email='cloud-spanner-developers@googlegroups.com',
-        license='BSD',
-        packages=find_packages(exclude=['tests']),
-        install_requires=dependencies,
-        url="https://github.com/googleapis/python-spanner-django",
-        classifiers=[
-            release_status,
-            'Environment :: Web Environment',
-            'Intended Audience :: Developers',
-            'License :: OSI Approved :: BSD',
-            'Operating System :: OS Independent',
-            'Programming Language :: Python :: 3',
-            'Programming Language :: Python :: 3.5',
-            'Programming Language :: Python :: 3.6',
-            'Programming Language :: Python :: 3.7',
-            'Topic :: Utilities',
-            'Framework :: Django',
-            'Framework :: Django :: 2.2',
-        ],
-        extras_require=extras,
-        python_requires=">=3.5",
+    name=name,
+    version=version,
+    description=description,
+    long_description=readme,
+    author="Google LLC",
+    author_email="cloud-spanner-developers@googlegroups.com",
+    license="BSD",
+    packages=find_packages(exclude=["tests"]),
+    install_requires=dependencies,
+    url="https://github.com/googleapis/python-spanner-django",
+    classifiers=[
+        release_status,
+        "Environment :: Web Environment",
+        "Intended Audience :: Developers",
+        "License :: OSI Approved :: BSD",
+        "Operating System :: OS Independent",
+        "Programming Language :: Python :: 3",
+        "Programming Language :: Python :: 3.5",
+        "Programming Language :: Python :: 3.6",
+        "Programming Language :: Python :: 3.7",
+        "Topic :: Utilities",
+        "Framework :: Django",
+        "Framework :: Django :: 2.2",
+    ],
+    extras_require=extras,
+    python_requires=">=3.5",
 )

spanner_dbapi/connection.py

@@ -108,7 +108,7 @@ def get_table_column_schema(self, table_name):
         column_details = {}
         for column_name, is_nullable, spanner_type in rows:
             column_details[column_name] = ColumnDetails(
-                null_ok=is_nullable == "YES", spanner_type=spanner_type,
+                null_ok=is_nullable == "YES", spanner_type=spanner_type
             )
         return column_details
 

spanner_dbapi/cursor.py

@@ -104,9 +104,7 @@ def execute(self, sql, args=None):
             raise OperationalError(e.details if hasattr(e, "details") else e)
 
     def __handle_update(self, sql, params):
-        self._connection.in_transaction(
-            self.__do_execute_update, sql, params,
-        )
+        self._connection.in_transaction(self.__do_execute_update, sql, params)
 
     def __do_execute_update(self, transaction, sql, params, param_types=None):
         sql = ensure_where_clause(sql)
@@ -141,14 +139,14 @@ def __handle_insert(self, sql, params):
             # The common case of multiple values being passed in
             # non-complex pyformat args and need to be uploaded in one RPC.
             return self._connection.in_transaction(
-                self.__do_execute_insert_homogenous, parts,
+                self.__do_execute_insert_homogenous, parts
             )
         else:
             # All the other cases that are esoteric and need
             #   transaction.execute_sql
             sql_params_list = parts.get("sql_params_list")
             return self._connection.in_transaction(
-                self.__do_execute_insert_heterogenous, sql_params_list,
+                self.__do_execute_insert_heterogenous, sql_params_list
             )
 
     def __do_execute_insert_heterogenous(self, transaction, sql_params_list):

spanner_dbapi/parse_utils.py

@@ -299,7 +299,7 @@ def rows_for_insert_or_update(columns, params, pyformat_args=None):
     # Now chop up the strides.
     strides = []
     for step in range(0, len(params), n_stride):
-        stride = tuple(params[step: step + n_stride:])
+        stride = tuple(params[step : step + n_stride :])
         strides.append(stride)
 
     return strides

tests/spanner_dbapi/test_connect.py

@@ -36,19 +36,26 @@ def test_connect(self):
             ) as client_info_mock:
 
                 connection = connect(
-                    "test-instance", "test-database", PROJECT, CREDENTIALS, USER_AGENT
+                    "test-instance",
+                    "test-database",
+                    PROJECT,
+                    CREDENTIALS,
+                    USER_AGENT,
                 )
 
                 self.assertIsInstance(connection, Connection)
                 client_info_mock.assert_called_once_with(USER_AGENT)
 
             client_mock.assert_called_once_with(
-                project=PROJECT, credentials=CREDENTIALS, client_info=CLIENT_INFO
+                project=PROJECT,
+                credentials=CREDENTIALS,
+                client_info=CLIENT_INFO,
             )
 
     def test_instance_not_found(self):
         with mock.patch(
-            "google.cloud.spanner_v1.instance.Instance.exists", return_value=False
+            "google.cloud.spanner_v1.instance.Instance.exists",
+            return_value=False,
         ) as exists_mock:
 
             with self.assertRaises(ValueError):
@@ -58,10 +65,12 @@ def test_instance_not_found(self):
 
     def test_database_not_found(self):
         with mock.patch(
-            "google.cloud.spanner_v1.instance.Instance.exists", return_value=True
+            "google.cloud.spanner_v1.instance.Instance.exists",
+            return_value=True,
         ):
             with mock.patch(
-                "google.cloud.spanner_v1.database.Database.exists", return_value=False
+                "google.cloud.spanner_v1.database.Database.exists",
+                return_value=False,
             ) as exists_mock:
 
                 with self.assertRaises(ValueError):
@@ -88,7 +97,8 @@ def test_connect_database_id(self):
             "google.cloud.spanner_v1.instance.Instance.database"
         ) as database_mock:
             with mock.patch(
-                "google.cloud.spanner_v1.instance.Instance.exists", return_value=True
+                "google.cloud.spanner_v1.instance.Instance.exists",
+                return_value=True,
             ):
                 connection = connect("test-instance", DATABASE)