Fix WPT sync and simplify the update scripts (#29999)

Much of the code used to import WPT tests from upstream has been moved
to the WPT repository itself, so this can be reused. In addition,
simplify the workflows by merging the entire process into mach and also
directly into the GitHub workflow. This should fix WPT imports after
combining compilation of layout and legacy layout.

Signed-off-by: Martin Robinson <mrobinson@igalia.com>
This commit is contained in:
Martin Robinson 2023-07-17 15:55:57 +02:00 committed by GitHub
parent 4c8b47adbb
commit da5b861b3c
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
9 changed files with 124 additions and 541 deletions

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@ -41,10 +41,10 @@ jobs:
wget http://mirrors.kernel.org/ubuntu/pool/main/libf/libffi/libffi6_3.2.1-8_amd64.deb
sudo apt install ./libffi6_3.2.1-8_amd64.deb
python3 ./mach bootstrap-gstreamer
- name: Fetch upstream changes before testing
- name: Sync from upstream WPT
if: ${{ inputs.wpt == 'sync' }}
run: |
./etc/ci/update-wpt-checkout fetch-upstream-changes
./mach update-wpt --sync --patch
- name: Run tests
if: ${{ inputs.wpt != 'sync' }}
run: |

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@ -1,4 +1,4 @@
name: Pull request (WPT export)
name: WPT Export
on:
pull_request_target:
types: ['opened', 'synchronize', 'reopened', 'edited', 'closed']

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@ -1,4 +1,4 @@
name: Scheduled WPT import
name: WPT Import
on:
schedule:
@ -46,16 +46,16 @@ jobs:
git fetch --unshallow upstream
- name: Fetch upstream changes before syncing
run: |
./etc/ci/update-wpt-checkout fetch-upstream-changes
- name: Run WPT Update
env:
MAX_CHUNK_ID: 20
WPT_SYNC_TOKEN: ${{ secrets.WPT_SYNC_TOKEN }}
./mach update-wpt --sync --patch
- name: Amend commit with test results
run: |
export CURRENT_DATE=$(date +"%d-%m-%Y")
echo $CURRENT_DATE
echo "CURRENT_DATE=$CURRENT_DATE" >> $GITHUB_ENV
./etc/ci/wpt-scheduled-update.sh
./mach update-wpt wpt-logs-linux-layout-2013/test-wpt.*.log
./mach update-wpt --layout-2020 wpt-logs-linux-layout-2020/test-wpt.*.log
git add tests/wpt/meta tests/wpt/meta-legacy-layout
git commit -a --amend --no-edit
- name: Push changes
uses: ad-m/github-push-action@master
with:
@ -68,9 +68,8 @@ jobs:
BODY=$(cat <<EOF
Automated downstream sync of changes from upstream as of ${{ env.CURRENT_DATE }}
[no-wpt-sync]
r? @servo-wpt-sync
EOF
)
gh pr create \
--title "Sync WPT with upstream (${{ env.CURRENT_DATE }})" \
--body "$BODY" --head ${{ env.UPDATE_BRANCH }}"
--body "$BODY" --head ${{ env.UPDATE_BRANCH }}

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@ -1,160 +0,0 @@
#!/usr/bin/env bash
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
set -o errexit
set -o nounset
set -o pipefail
REMOTE_NAME=sync-fork
LOG_FILE=test-wpt.log
BLUETOOTH_LOG_FILE=test-wpt-bluetooth.log
WDSPEC_LOG_FILE=test-wpt-wdspec.log
CURRENT_DATE=$(date +"%d-%m-%Y")
BRANCH_NAME="wpt_update"
REMOTE_BRANCH_NAME="wpt_update_${CURRENT_DATE}"
export GIT_AUTHOR_NAME="WPT Sync Bot"
export GIT_AUTHOR_EMAIL="josh+wptsync@joshmatthews.net"
export GIT_COMMITTER_NAME="${GIT_AUTHOR_NAME}"
export GIT_COMMITTER_EMAIL="${GIT_AUTHOR_EMAIL}"
# Retrieve the HEAD commit and extract its hash
function latest_git_commit() {
git log -1 --oneline | cut -f 1 -d ' '
}
# Create a new branch for this sync, pull down all changes from the upstream
# web-platform-tests repository, and commit the changes.
function unsafe_pull_from_upstream() {
git checkout -b "${1}" || return 1
OLD_COMMIT=$(latest_git_commit)
# Fetch all changes from upstream WPT and automatically transpose them
# into a single servo commit.
./mach update-wpt --sync --patch || return 2
# If there was no new commit created, there are no changes that need syncing.
# Skip the remaining steps.
if [[ "$(latest_git_commit)" == "${OLD_COMMIT}" ]]; then
return 255
fi
# Update the manifest to include the new changes.
./mach update-manifest || return 3
# Update the manifest again to reach a fixed state (https://github.com/servo/servo/issues/22275).
./mach update-manifest || return 4
# Clean up any now-unused test results.
(python3 etc/unused_wpt_results.py | xargs rm -rfv) || return 5
# Amend the existing commit with the new changes from updating the manifest.
git commit -a --amend --no-edit || return 6
}
# Remove all local traces of this sync operation.
function cleanup() {
git remote rm "${REMOTE_NAME}" || true
git reset --hard || true
git checkout master || true
git branch -D "${BRANCH_NAME}" || true
./mach update-wpt --abort || true
}
# Build Servo and run the full WPT testsuite, saving the results to a log file.
function unsafe_run_tests() {
# Run the full testsuite and record the new test results.
./mach test-wpt --release --processes 12 --log-raw "${1}" \
--always-succeed || return 1
# Run the bluetooth testsuite, which uses the webdriver test harness.
./mach test-wpt --release --product=servodriver --headless \
--log-raw "${2}" /bluetooth --always-succeed || return 2
# Run the wdspec testsuite
./mach test-wpt --release --timeout-multiplier=4 --log-raw "${3}" /webdriver \
--always-succeed || return 3
}
# Using an existing log file, update the expected test results and amend the
# last commit with the new results.
function unsafe_update_metadata() {
./mach update-wpt "${1}" "${2}" "${3}" || return 1
# Hope that any test result changes from layout-2013 are also applicable to layout-2020.
./mach update-wpt --layout-2020 "${1}" "${2}" "${3}" || return 2
# Ensure any new directories or ini files are included in these changes.
git add tests/wpt/meta tests/wpt/metadata-legacy-layout tests/wpt/mozilla/meta tests/wpt/mozilla/meta-legacy-layout || return 3
# Merge all changes with the existing commit.
git commit -a --amend --no-edit || return 3
}
function pull_from_upstream() {
unsafe_pull_from_upstream "${1}" || { code="${?}"; cleanup; return "${code}"; }
}
function run_tests() {
unsafe_run_tests "${1}" "${2}" "${3}" || { code="${?}"; cleanup; return "${code}"; }
}
function update_metadata() {
unsafe_update_metadata "${1}" "${2}" "${3}" || { code="${?}"; cleanup; return "${code}"; }
}
SCRIPT_NAME="${0}"
function update_test_results() {
run_tests "${LOG_FILE}" "${BLUETOOTH_LOG_FILE}" "${WDSPEC_LOG_FILE}"
update_metadata "${LOG_FILE}" "${BLUETOOTH_LOG_FILE}" "${WDSPEC_LOG_FILE}"
}
function fetch_upstream_changes() {
pull_from_upstream "${BRANCH_NAME}"
}
function usage() {
echo "usage: ${SCRIPT_NAME} [cmd]"
echo " commands:"
echo " - fetch-upstream-changes: create a branch with the latest changes from upstream"
echo " - update-test-results: run the tests, update the expected test results, and commit the changes"
echo " - fetch-and-update-expectations: combines fetch-upstream-changes and update-test-results"
echo " - cleanup: cleanup all traces of an in-progress sync and checkout the master branch"
exit 1
}
function main() {
if [[ "${1}" == "fetch-upstream-changes" ]] || [[ "${1}" == "fetch-and-update-expectations" ]]; then
code=""
fetch_upstream_changes || code="${?}"
if [[ "${code}" == "255" ]]; then
echo "No changes to sync."
return 0
fi
if [[ "${code}" != "" ]]; then
return "${code}"
else
return 0
fi
fi
if [[ "${1}" == "update-test-results" ]] || [[ "${1}" == "fetch-and-update-expectations" ]]; then
update_test_results
elif [[ "${1}" == "cleanup" ]]; then
cleanup
else
usage
fi
}
if [[ "$#" != 1 ]]; then
usage
fi
# Ensure we clean up after ourselves if this script is interrupted.
trap 'cleanup' SIGINT SIGTERM
main "${1}"

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@ -1,45 +0,0 @@
#!/usr/bin/env bash
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
set -o errexit
set -o nounset
set -o pipefail
# For a given chunk, use the existing log files to update the expected test
# results and amend the last commit with the new results.
function unsafe_update_metadata_chunk() {
./mach update-wpt \
"wpt-logs-linux-layout-2013/test-wpt.${1}.log" || return 1
./mach update-wpt --layout-2020 \
"wpt-logs-linux-layout-2020/test-wpt.${1}.log" || return 2
# Ensure any new directories or ini files are included in these changes.
git add tests/wpt/meta \
tests/wpt/meta-legacy-layout \
tests/wpt/mozilla/meta \
tests/wpt/mozilla/meta-legacy-layout || return 3
# Merge all changes with the existing commit.
git commit -a --amend --no-edit || return 3
}
function update_metadata_chunk() {
unsafe_update_metadata_chunk "${1}" || \
{ code="${?}"; return "${code}"; }
}
function main() {
for n in $(seq 1 "${MAX_CHUNK_ID}")
do
code=""
update_metadata_chunk "${n}" || code="${?}"
if [[ "${code}" != "" ]]; then
return "${code}"
fi
done
}
main

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@ -1,55 +0,0 @@
#!/usr/bin/env python
# Copyright 2019 The Servo Project Developers. See the COPYRIGHT
# file at the top-level directory of this distribution.
#
# Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
# http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
# <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
# option. This file may not be copied, modified, or distributed
# except according to those terms.
# For all directories and ini files under the WPT metadata directory,
# check whether there is a match directory/test file in the vendored WPT
# test collection. If there is not, the test result file is leftover since
# the original test was moved/renamed/deleted and no longer serves any
# purpose.
import os
test_root = os.path.join('tests', 'wpt', 'tests')
meta_root = os.path.join('tests', 'wpt', 'meta')
missing_dirs = []
for base_dir, dir_names, files in os.walk(meta_root):
# Skip recursing into any directories that were previously found to be missing.
if base_dir in missing_dirs:
# Skip processing any subdirectories of known missing directories.
missing_dirs += map(lambda x: os.path.join(base_dir, x), dir_names)
continue
for dir_name in dir_names:
meta_dir = os.path.join(base_dir, dir_name)
# Skip any known directories that are meta-metadata.
if dir_name == '.cache':
missing_dirs += [meta_dir]
continue
# Turn tests/wpt/meta/foo into tests/wpt/tests/foo.
test_dir = os.path.join(test_root, os.path.relpath(meta_dir, meta_root))
if not os.path.exists(test_dir):
missing_dirs += [meta_dir]
print(meta_dir)
for fname in files:
# Skip any known files that are meta-metadata.
if fname in ['__dir__.ini', 'MANIFEST.json', 'mozilla-sync']:
continue
# Turn tests/wpt/meta/foo/bar.html.ini into tests/wpt/tests/foo/bar.html.
test_dir = os.path.join(test_root, os.path.relpath(base_dir, meta_root))
test_file = os.path.join(test_dir, fname)
if not os.path.exists(os.path.splitext(test_file)[0]):
print(os.path.join(base_dir, fname))

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@ -1,59 +0,0 @@
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
import os
import sys
from .tree import GitTree, GeckoCommit
from wptrunner.update import setup_logging, WPTUpdate # noqa: F401
from wptrunner.update.base import Step, StepRunner, exit_unclean # noqa: F401
from wptrunner.update.update import LoadConfig, SyncFromUpstream, UpdateMetadata # noqa: F401
from wptrunner import wptcommandline # noqa: F401
class LoadTrees(Step):
"""Load gecko tree and sync tree containing web-platform-tests"""
provides = ["local_tree", "sync_tree"]
def create(self, state):
if os.path.exists(state.sync["path"]):
sync_tree = GitTree(root=state.sync["path"])
else:
sync_tree = None
assert GitTree.is_type()
state.update({"local_tree": GitTree(commit_cls=GeckoCommit),
"sync_tree": sync_tree})
class UpdateRunner(StepRunner):
"""Overall runner for updating web-platform-tests in Gecko."""
steps = [LoadConfig,
LoadTrees,
SyncFromUpstream,
UpdateMetadata]
def run_update(**kwargs):
logger = setup_logging(kwargs, {"mach": sys.stdout})
updater = WPTUpdate(logger, runner_cls=UpdateRunner, **kwargs)
return updater.run() != exit_unclean
def create_parser():
parser = wptcommandline.create_parser_update()
parser.add_argument("--layout-2020", "--with-layout-2020", default=False, action="store_true",
help="Use expected results for the 2020 layout engine")
parser.add_argument("--layout-2013", "--with-layout-2013", default=True, action="store_true",
help="Use expected results for the 2013 layout engine")
return parser
def check_args(kwargs):
wptcommandline.set_from_config(kwargs)
if hasattr(wptcommandline, 'check_paths'):
wptcommandline.check_paths(kwargs)
return kwargs

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@ -1,201 +0,0 @@
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at https://mozilla.org/MPL/2.0/.
from distutils.spawn import find_executable
import re
import subprocess
import sys
import tempfile
from wptrunner import update as wptupdate
from wptrunner.update.tree import Commit, CommitMessage, get_unique_name
class GitTree(wptupdate.tree.GitTree):
def __init__(self, *args, **kwargs):
"""Extension of the basic GitTree with extra methods for
transfering patches"""
commit_cls = kwargs.pop("commit_cls", Commit)
wptupdate.tree.GitTree.__init__(self, *args, **kwargs)
self.commit_cls = commit_cls
def create_branch(self, name, ref=None):
"""Create a named branch,
:param name: String representing the branch name.
:param ref: None to use current HEAD or rev that the branch should point to"""
args = []
if ref is not None:
if hasattr(ref, "sha1"):
ref = ref.sha1
args.append(ref)
self.git("branch", name, *args)
def commits_by_message(self, message, path=None):
"""List of commits with messages containing a given string.
:param message: The string that must be contained in the message.
:param path: Path to a file or directory the commit touches
"""
args = ["--pretty=format:%H", "--reverse", "-z", "--grep=%s" % message]
if path is not None:
args.append("--")
args.append(path)
data = self.git("log", *args)
return [self.commit_cls(self, sha1) for sha1 in data.split("\0")]
def log(self, base_commit=None, path=None):
"""List commits touching a certian path from a given base commit.
:base_param commit: Commit object for the base commit from which to log
:param path: Path that the commits must touch
"""
args = ["--pretty=format:%H", "--reverse", "-z", "--no-merges"]
if base_commit is not None:
args.append("%s.." % base_commit.sha1)
if path is not None:
args.append("--")
args.append(path)
data = self.git("log", *args)
return [self.commit_cls(self, sha1) for sha1 in data.split("\0") if sha1]
def import_patch(self, patch, strip_count):
"""Import a patch file into the tree and commit it
:param patch: a Patch object containing the patch to import
"""
with tempfile.NamedTemporaryFile() as f:
f.write(patch.diff)
f.flush()
f.seek(0)
self.git("apply", "--index", f.name, "-p", str(strip_count))
self.git("commit", "-m", patch.message.text, "--author=%s" % patch.full_author)
def rebase(self, ref, continue_rebase=False):
"""Rebase the current branch onto another commit.
:param ref: A Commit object for the commit to rebase onto
:param continue_rebase: Continue an in-progress rebase"""
if continue_rebase:
args = ["--continue"]
else:
if hasattr(ref, "sha1"):
ref = ref.sha1
args = [ref]
self.git("rebase", *args)
def push(self, remote, local_ref, remote_ref, force=False):
"""Push local changes to a remote.
:param remote: URL of the remote to push to
:param local_ref: Local branch to push
:param remote_ref: Name of the remote branch to push to
:param force: Do a force push
"""
args = []
if force:
args.append("-f")
args.extend([remote, "%s:%s" % (local_ref, remote_ref)])
self.git("push", *args)
def unique_branch_name(self, prefix):
"""Get an unused branch name in the local tree
:param prefix: Prefix to use at the start of the branch name"""
branches = [ref[len("refs/heads/"):] for sha1, ref in self.list_refs()
if ref.startswith("refs/heads/")]
return get_unique_name(branches, prefix)
class Patch(object):
def __init__(self, author, email, message, merge_message, diff):
self.author = author
self.email = email
self.merge_message = merge_message
if isinstance(message, CommitMessage):
self.message = message
else:
self.message = GeckoCommitMessage(message)
self.diff = diff
def __repr__(self):
return "<Patch (%s)>" % self.message.full_summary
@property
def full_author(self):
return "%s <%s>" % (self.author, self.email)
@property
def empty(self):
return bool(self.diff.strip())
class GeckoCommitMessage(CommitMessage):
"""Commit message following the Gecko conventions for identifying bug number
and reviewer"""
# c.f. http://hg.mozilla.org/hgcustom/version-control-tools/file/tip/hghooks/mozhghooks/commit-message.py
# which has the regexps that are actually enforced by the VCS hooks. These are
# slightly different because we need to parse out specific parts of the message rather
# than just enforce a general pattern.
_bug_re = re.compile(r"^Bug (\d+)[^\w]*(?:Part \d+[^\w]*)?(.*?)\s*(?:r=(\w*))?$",
re.IGNORECASE)
_merge_re = re.compile(r"^Auto merge of #(\d+) - [^:]+:[^,]+, r=(.+)$", re.IGNORECASE)
_backout_re = re.compile(r"^(?:Back(?:ing|ed)\s+out)|Backout|(?:Revert|(?:ed|ing))",
re.IGNORECASE)
_backout_sha1_re = re.compile(r"(?:\s|\:)(0-9a-f){12}")
def _parse_message(self):
CommitMessage._parse_message(self)
if self._backout_re.match(self.full_summary):
self.backouts = self._backout_re.findall(self.full_summary)
else:
self.backouts = []
m = self._merge_re.match(self.full_summary)
if m is not None:
self.bug, self.reviewer = m.groups()
self.summary = self.full_summary
else:
m = self._bug_re.match(self.full_summary)
if m is not None:
self.bug, self.summary, self.reviewer = m.groups()
else:
self.bug, self.summary, self.reviewer = None, self.full_summary, None
class GeckoCommit(Commit):
msg_cls = GeckoCommitMessage
def __init__(self, tree, sha1, is_merge=False):
Commit.__init__(self, tree, sha1)
if not is_merge:
args = ["-c", sha1]
try:
merge_rev = self.git("when-merged", *args).strip()
except subprocess.CalledProcessError as exn:
if not find_executable('git-when-merged'):
print('Please add the `when-merged` git command to your PATH '
'(https://github.com/mhagger/git-when-merged/).')
sys.exit(1)
raise exn
self.merge = GeckoCommit(tree, merge_rev, True)
def export_patch(self, path=None):
"""Convert a commit in the tree to a Patch with the bug number and
reviewer stripped from the message"""
args = ["--binary", self.sha1]
if path is not None:
args.append("--")
args.append(path)
diff = self.git("show", *args)
merge_message = self.merge.message if self.merge else None
return Patch(self.author, self.email, self.message, merge_message, diff)

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@ -4,26 +4,130 @@
# pylint: disable=missing-docstring
import os
import subprocess
import shutil
import sys
from wptrunner.update import setup_logging, WPTUpdate # noqa: F401
from wptrunner.update.base import exit_unclean # noqa: F401
from wptrunner import wptcommandline # noqa: F401
from . import WPT_PATH, update_args_for_legacy_layout
from . import importer
from . import manifestupdate
TEST_ROOT = os.path.join(WPT_PATH, 'tests')
META_ROOTS = [
os.path.join(WPT_PATH, 'meta'),
os.path.join(WPT_PATH, 'meta-legacy')
]
def set_if_none(args: dict, key: str, value):
if key not in args or args[key] is None:
args[key] = value
def do_sync(**kwargs) -> int:
last_commit = subprocess.check_output(["git", "log", "-1"])
# Commits should always be authored by the GitHub Actions bot.
os.environ["GIT_AUTHOR_NAME"] = "Servo WPT Sync"
os.environ["GIT_AUTHOR_EMAIL"] = "josh+wptsync@joshmatthews.net"
os.environ["GIT_COMMITTER_NAME"] = os.environ['GIT_AUTHOR_NAME']
os.environ["GIT_COMMITTER_EMAIL"] = os.environ['GIT_AUTHOR_EMAIL']
print("Updating WPT from upstream...")
run_update(**kwargs)
if last_commit == subprocess.check_output(["git", "log", "-1"]):
return 255
# Update the manifest twice to reach a fixed state
# (https://github.com/servo/servo/issues/22275).
print("Updating test manifests...")
manifestupdate.update(check_clean=False)
manifestupdate.update(check_clean=False)
remove_unused_metadata()
if subprocess.check_call(["git", "commit", "-a", "--amend", "--no-edit", "-q"]) != 0:
print("Ammending commit failed. Bailing out.")
return 1
return 0
def update_tests(**kwargs):
def remove_unused_metadata():
print("Removing unused results...")
unused_files = []
unused_dirs = []
for meta_root in META_ROOTS:
for base_dir, dir_names, files in os.walk(meta_root):
# Skip recursing into any directories that were previously found to be missing.
if base_dir in unused_dirs:
# Skip processing any subdirectories of known missing directories.
unused_dirs += [os.path.join(base_dir, x) for x in dir_names]
continue
for dir_name in dir_names:
dir_path = os.path.join(base_dir, dir_name)
# Skip any known directories that are meta-metadata.
if dir_name == '.cache':
unused_dirs.append(dir_path)
continue
# Turn tests/wpt/meta/foo into tests/wpt/tests/foo.
test_dir = os.path.join(TEST_ROOT, os.path.relpath(dir_path, meta_root))
if not os.path.exists(test_dir):
unused_dirs.append(dir_path)
for fname in files:
# Skip any known files that are meta-metadata.
if not fname.endswith(".ini") or fname == '__dir__.ini':
continue
# Turn tests/wpt/meta/foo/bar.html.ini into tests/wpt/tests/foo/bar.html.
test_file = os.path.join(
TEST_ROOT, os.path.relpath(base_dir, meta_root), fname[:-4])
if not os.path.exists(test_file):
unused_files.append(os.path.join(base_dir, fname))
for file in unused_files:
print(f" - {file}")
os.remove(file)
for directory in unused_dirs:
print(f" - {directory}")
shutil.rmtree(directory)
def update_tests(**kwargs) -> int:
def set_if_none(args: dict, key: str, value):
if key not in args or args[key] is None:
args[key] = value
set_if_none(kwargs, "product", "servo")
set_if_none(kwargs, "config", os.path.join(WPT_PATH, "config.ini"))
kwargs["store_state"] = False
importer.check_args(kwargs)
wptcommandline.set_from_config(kwargs)
if hasattr(wptcommandline, 'check_paths'):
wptcommandline.check_paths(kwargs)
update_args_for_legacy_layout(kwargs)
return 1 if not importer.run_update(**kwargs) else 0
if kwargs.get('sync', False):
return do_sync(**kwargs)
return 0 if run_update(**kwargs) else 1
def create_parser(**kwargs):
return importer.create_parser()
def run_update(**kwargs) -> bool:
"""Run the update process returning True if the process is successful."""
logger = setup_logging(kwargs, {"mach": sys.stdout})
return WPTUpdate(logger, **kwargs).run() != exit_unclean
def create_parser(**_kwargs):
parser = wptcommandline.create_parser_update()
parser.add_argument("--layout-2020", "--with-layout-2020", default=False, action="store_true",
help="Use expected results for the 2020 layout engine")
parser.add_argument("--layout-2013", "--with-layout-2013", default=True, action="store_true",
help="Use expected results for the 2013 layout engine")
return parser