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#!/usr/bin/env python
# Copyright 2017 The PDFium Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
"""Looks for performance regressions on all pushes since the last run.
Run this nightly to have a periodical check for performance regressions.
Stores the results for each run and last checkpoint in a results directory.
"""
import argparse
import datetime
import json
import os
import subprocess
import sys
from githelper import GitHelper
from safetynet_conclusions import PrintConclusionsDictHumanReadable
class JobContext(object):
"""Context for a single run, including name and directory paths."""
def __init__(self, args):
self.run_name = datetime.datetime.now().strftime('%Y-%m-%d-%H-%M-%S')
self.results_dir = args.results_dir
self.last_revision_covered_file = os.path.join(self.results_dir,
'last_revision_covered')
self.run_output_dir = os.path.join(self.results_dir,
'profiles_%s' % self.run_name)
self.run_output_log_file = os.path.join(self.results_dir,
'%s.log' % self.run_name)
class JobRun(object):
"""A single run looking for regressions since the last one."""
def __init__(self, args, context):
"""Constructor.
Args:
args: Namespace with arguments passed to the script.
context: JobContext for this run.
"""
self.git = GitHelper()
self.args = args
self.context = context
def Run(self):
"""Searches for regressions.
Will only write a checkpoint when first run, and on all subsequent runs
a comparison is done against the last checkpoint.
Returns:
Exit code for the script: 0 if no significant changes are found; 1 if
there was an error in the comparison; 2 if there was a regression; 3 if
there was an improvement and no regression.
"""
pdfium_src_dir = os.path.join(
os.path.dirname(__file__),
os.path.pardir,
os.path.pardir)
os.chdir(pdfium_src_dir)
if not self.git.IsCurrentBranchClean():
print 'Current branch is not clean, aborting'
return 1
branch_to_restore = self.git.GetCurrentBranchName()
if not self.args.no_fetch:
self.git.FetchOriginMaster()
self.git.Checkout('origin/master')
# Make sure results dir exists
if not os.path.exists(self.context.results_dir):
os.makedirs(self.context.results_dir)
if not os.path.exists(self.context.last_revision_covered_file):
result = self._InitialRun()
else:
with open(self.context.last_revision_covered_file) as f:
last_revision_covered = f.read().strip()
result = self._IncrementalRun(last_revision_covered)
self.git.Checkout(branch_to_restore)
return result
def _InitialRun(self):
"""Initial run, just write a checkpoint.
Returns:
Exit code for the script.
"""
current = self.git.GetCurrentBranchHash()
print 'Initial run, current is %s' % current
self._WriteCheckpoint(current)
print 'All set up, next runs will be incremental and perform comparisons'
return 0
def _IncrementalRun(self, last_revision_covered):
"""Incremental run, compare against last checkpoint and update it.
Args:
last_revision_covered: String with hash for last checkpoint.
Returns:
Exit code for the script.
"""
current = self.git.GetCurrentBranchHash()
print ('Incremental run, current is %s, last is %s'
% (current, last_revision_covered))
if current == last_revision_covered:
print 'No changes seen, finishing job'
return 0
# Run compare
if not os.path.exists(self.context.run_output_dir):
os.makedirs(self.context.run_output_dir)
cmd = ['testing/tools/safetynet_compare.py',
'--this-repo',
'--machine-readable',
'--branch-before=%s' % last_revision_covered,
'--output-dir=%s' % self.context.run_output_dir]
cmd.extend(self.args.input_paths)
p = subprocess.Popen(cmd, stdout=subprocess.PIPE)
json_output, _ = p.communicate()
output_info = json.loads(json_output)
PrintConclusionsDictHumanReadable(output_info,
colored=(not self.args.output_to_log),
key='after')
status = 0
if output_info['summary']['improvement']:
print 'Improvement detected.'
status = 3
if output_info['summary']['regression']:
print 'Regression detected.'
status = 2
if status == 0:
print 'Nothing detected.'
self._WriteCheckpoint(current)
return status
def _WriteCheckpoint(self, checkpoint):
if not self.args.no_checkpoint:
with open(self.context.last_revision_covered_file, 'w') as f:
f.write(checkpoint + '\n')
def main():
parser = argparse.ArgumentParser()
parser.add_argument('results_dir',
help='where to write the job results')
parser.add_argument('input_paths', nargs='+',
help='pdf files or directories to search for pdf files '
'to run as test cases')
parser.add_argument('--no-fetch', action='store_true',
help='whether to skip the git fetch. Use for script '
'debugging.')
parser.add_argument('--no-checkpoint', action='store_true',
help='whether to skip writing the new checkpoint. Use '
'for script debugging.')
parser.add_argument('--output-to-log', action='store_true',
help='whether to write output to a log file')
args = parser.parse_args()
job_context = JobContext(args)
if args.output_to_log:
log_file = open(job_context.run_output_log_file, 'w')
sys.stdout = log_file
sys.stderr = log_file
run = JobRun(args, job_context)
result = run.Run()
if args.output_to_log:
log_file.close()
return result
if __name__ == '__main__':
sys.exit(main())
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