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# Copyright 2016 Google Inc. All Rights Reserved.
#
# 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.
from __future__ import print_function
import fnmatch
import os
import tempfile
import nox
try:
import ci_diff_helper
except ImportError:
ci_diff_helper = None
#
# Helpers and utility functions
#
def _list_files(folder, pattern):
"""Lists all files below the given folder that match the pattern."""
for root, folders, files in os.walk(folder):
for filename in files:
if fnmatch.fnmatch(filename, pattern):
yield os.path.join(root, filename)
def _collect_dirs(
start_dir,
blacklist=set(["conftest.py", "noxfile.py", "lib", "third_party"]),
suffix="_test.py",
recurse_further=False,
):
"""Recursively collects a list of dirs that contain a file matching the
given suffix.
This works by listing the contents of directories and finding
directories that have `*_test.py` files.
"""
# Collect all the directories that have tests in them.
for parent, subdirs, files in os.walk(start_dir):
if "./." in parent:
continue # Skip top-level dotfiles
elif any(f for f in files if f.endswith(suffix) and f not in blacklist):
# Don't recurse further for tests, since py.test will do that.
if not recurse_further:
del subdirs[:]
# This dir has desired files in it. yield it.
yield parent
else:
# Filter out dirs we don't want to recurse into
subdirs[:] = [s for s in subdirs if s[0].isalpha() and s not in blacklist]
def _get_changed_files():
"""Returns a list of files changed for this pull request / push.
If running on a public CI like Travis or Circle this is used to only
run tests/lint for changed files.
"""
if not ci_diff_helper:
return None
try:
config = ci_diff_helper.get_config()
except OSError: # Not on CI.
return None
changed_files = ci_diff_helper.get_changed_files("HEAD", config.base)
changed_files = set(["./{}".format(filename) for filename in changed_files])
return changed_files
def _filter_samples(sample_dirs, changed_files):
"""Filers the list of sample directories to only include directories that
contain files in the list of changed files."""
result = []
for sample_dir in sample_dirs:
for changed_file in changed_files:
if changed_file.startswith(sample_dir):
result.append(sample_dir)
return list(set(result))
def _determine_local_import_names(start_dir):
"""Determines all import names that should be considered "local".
This is used when running the linter to insure that import order is
properly checked.
"""
file_ext_pairs = [os.path.splitext(path) for path in os.listdir(start_dir)]
return [
basename
for basename, extension in file_ext_pairs
if extension == ".py"
or os.path.isdir(os.path.join(start_dir, basename))
and basename not in ("__pycache__")
]
#
# App Engine specific helpers
#
_GAE_ROOT = os.environ.get("GAE_ROOT")
if _GAE_ROOT is None:
_GAE_ROOT = tempfile.mkdtemp()
def _setup_appengine_sdk(session):
"""Installs the App Engine SDK, if needed."""
session.env["GAE_SDK_PATH"] = os.path.join(_GAE_ROOT, "google_appengine")
session.run("gcp-devrel-py-tools", "download-appengine-sdk", _GAE_ROOT)
#
# Test sessions
#
PYTEST_COMMON_ARGS = ["--junitxml=sponge_log.xml"]
# Ignore I202 "Additional newline in a section of imports." to accommodate
# region tags in import blocks. Since we specify an explicit ignore, we also
# have to explicitly ignore the list of default ignores:
# `E121,E123,E126,E226,E24,E704,W503,W504` as shown by `flake8 --help`.
FLAKE8_COMMON_ARGS = [
"--show-source",
"--builtin",
"gettext",
"--max-complexity",
"20",
"--import-order-style",
"google",
"--exclude",
".nox,.cache,env,lib,generated_pb2,*_pb2.py,*_pb2_grpc.py",
"--ignore=E121,E123,E126,E226,E24,E704,W503,W504,I100,I201,I202",
"--max-line-length=88",
]
# Collect sample directories.
ALL_TESTED_SAMPLES = sorted(list(_collect_dirs(".")))
ALL_SAMPLE_DIRECTORIES = sorted(
list(_collect_dirs(".", suffix=".py", recurse_further=True))
)
GAE_STANDARD_SAMPLES = [
sample
for sample in ALL_TESTED_SAMPLES
if sample.startswith("./appengine/standard/")
]
PY2_ONLY_SAMPLES = GAE_STANDARD_SAMPLES
PY3_ONLY_SAMPLES = [
sample
for sample in ALL_TESTED_SAMPLES
if (
sample.startswith("./appengine/standard_python37")
or sample.startswith("./functions/")
or sample.startswith("./bigquery/pandas-gbq-migration")
or sample.startswith("./run/system-package")
or sample.startswith("./run/hello-broken")
)
]
NON_GAE_STANDARD_SAMPLES_PY2 = sorted(
list((set(ALL_TESTED_SAMPLES) - set(GAE_STANDARD_SAMPLES)) - set(PY3_ONLY_SAMPLES))
)
NON_GAE_STANDARD_SAMPLES_PY3 = sorted(
list(set(ALL_TESTED_SAMPLES) - set(PY2_ONLY_SAMPLES))
)
# Filter sample directories if on a CI like Travis or Circle to only run tests
# for changed samples.
CHANGED_FILES = _get_changed_files()
if CHANGED_FILES is not None:
print("Filtering based on changed files.")
ALL_TESTED_SAMPLES = _filter_samples(ALL_TESTED_SAMPLES, CHANGED_FILES)
ALL_SAMPLE_DIRECTORIES = _filter_samples(ALL_SAMPLE_DIRECTORIES, CHANGED_FILES)
GAE_STANDARD_SAMPLES = _filter_samples(GAE_STANDARD_SAMPLES, CHANGED_FILES)
NON_GAE_STANDARD_SAMPLES_PY2 = _filter_samples(
NON_GAE_STANDARD_SAMPLES_PY2, CHANGED_FILES
)
NON_GAE_STANDARD_SAMPLES_PY3 = _filter_samples(
NON_GAE_STANDARD_SAMPLES_PY3, CHANGED_FILES
)
def _session_tests(session, sample, post_install=None):
"""Runs py.test for a particular sample."""
session.install("-r", "testing/requirements.txt")
session.chdir(sample)
if os.path.exists("requirements.txt"):
session.install("-r", "requirements.txt")
if post_install:
post_install(session)
session.run(
"pytest",
*(PYTEST_COMMON_ARGS + session.posargs),
# Pytest will return 5 when no tests are collected. This can happen
# on travis where slow and flaky tests are excluded.
# See http://doc.pytest.org/en/latest/_modules/_pytest/main.html
success_codes=[0, 5]
)
@nox.session(python="2.7")
@nox.parametrize("sample", GAE_STANDARD_SAMPLES)
def gae(session, sample):
"""Runs py.test for an App Engine standard sample."""
# Create a lib directory if needed, otherwise the App Engine vendor library
# will complain.
if not os.path.isdir(os.path.join(sample, "lib")):
os.mkdir(os.path.join(sample, "lib"))
_session_tests(session, sample, _setup_appengine_sdk)
@nox.session(python="2.7")
@nox.parametrize("sample", NON_GAE_STANDARD_SAMPLES_PY2)
def py27(session, sample):
"""Runs py.test for a sample using Python 2.7"""
_session_tests(session, sample)
@nox.session(python="3.6")
@nox.parametrize("sample", NON_GAE_STANDARD_SAMPLES_PY3)
def py36(session, sample):
"""Runs py.test for a sample using Python 3.6"""
_session_tests(session, sample)
@nox.session
@nox.parametrize("sample", ALL_SAMPLE_DIRECTORIES)
def lint(session, sample):
"""Runs flake8 on the sample."""
session.install("flake8", "flake8-import-order")
local_names = _determine_local_import_names(sample)
args = FLAKE8_COMMON_ARGS + [
"--application-import-names",
",".join(local_names),
".",
]
session.chdir(sample)
session.run("flake8", *args)
#
# Utility sessions
#
@nox.session
def missing_tests(session):
"""Lists all sample directories that do not have tests."""
print("The following samples do not have tests:")
for sample in set(ALL_SAMPLE_DIRECTORIES) - set(ALL_TESTED_SAMPLES):
print("* {}".format(sample))
SAMPLES_WITH_GENERATED_READMES = sorted(list(_collect_dirs(".", suffix=".rst.in")))
@nox.session
@nox.parametrize("sample", SAMPLES_WITH_GENERATED_READMES)
def readmegen(session, sample):
"""(Re-)generates the readme for a sample."""
session.install("jinja2", "pyyaml")
if os.path.exists(os.path.join(sample, "requirements.txt")):
session.install("-r", os.path.join(sample, "requirements.txt"))
in_file = os.path.join(sample, "README.rst.in")
session.run("python", "scripts/readme-gen/readme_gen.py", in_file)
@nox.session
def check_requirements(session):
"""Checks for out of date requirements and optionally updates them.
This is intentionally not parametric, as it's desired to never have two
samples with differing versions of dependencies.
"""
session.install("-r", "testing/requirements.txt")
if "update" in session.posargs:
command = "update-requirements"
else:
command = "check-requirements"
reqfiles = list(_list_files(".", "requirements*.txt"))
for reqfile in reqfiles:
session.run("gcp-devrel-py-tools", command, reqfile)
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