#!/usr/bin/python ''' Copyright 2013 Google Inc. Use of this source code is governed by a BSD-style license that can be found in the LICENSE file. ''' ''' Rebaselines GM test results as individual image files (the "old way", before https://goto.google.com/ChecksumTransitionDetail ). Once we have switched our expectations to JSON form for all platforms, we can delete this file. There is a lot of code duplicated between here and rebaseline.py, but that's fine because we will delete this file soon. ''' # System-level imports import os import re import subprocess import sys import urllib2 # Imports from within Skia # # We need to add the 'gm' directory, so that we can import gm_json.py within # that directory. That script allows us to parse the actual-results.json file # written out by the GM tool. # Make sure that the 'gm' dir is in the PYTHONPATH, but add it at the *end* # so any dirs that are already in the PYTHONPATH will be preferred. # # This assumes that the 'gm' directory has been checked out as a sibling of # the 'tools' directory containing this script, which will be the case if # 'trunk' was checked out as a single unit. GM_DIRECTORY = os.path.realpath( os.path.join(os.path.dirname(os.path.dirname(__file__)), 'gm')) if GM_DIRECTORY not in sys.path: sys.path.append(GM_DIRECTORY) import gm_json class CommandFailedException(Exception): pass class ImageRebaseliner(object): # params: # expectations_root: root directory of all expectations # json_base_url: base URL from which to read json_filename # json_filename: filename (under json_base_url) from which to read a # summary of results; typically "actual-results.json" # tests: list of tests to rebaseline, or None if we should rebaseline # whatever files the JSON results summary file tells us to # configs: which configs to run for each test, or None if we should # rebaseline whatever configs the JSON results summary file tells # us to # dry_run: if True, instead of actually downloading files or adding # files to checkout, display a list of operations that # we would normally perform # add_new: if True, add expectations for tests which don't have any yet # missing_json_is_fatal: whether to halt execution if we cannot read a # JSON actual result summary file def __init__(self, expectations_root, json_base_url, json_filename, tests=None, configs=None, dry_run=False, add_new=False, missing_json_is_fatal=False): self._expectations_root = expectations_root self._tests = tests self._configs = configs self._json_base_url = json_base_url self._json_filename = json_filename self._dry_run = dry_run self._add_new = add_new self._missing_json_is_fatal = missing_json_is_fatal self._googlestorage_gm_actuals_root = ( 'http://chromium-skia-gm.commondatastorage.googleapis.com/gm') self._testname_pattern = re.compile('(\S+)_(\S+).png') self._is_svn_checkout = ( os.path.exists(os.path.join(expectations_root, '.svn')) or os.path.exists(os.path.join(expectations_root, os.pardir, '.svn'))) self._is_git_checkout = ( os.path.exists(os.path.join(expectations_root, '.git')) or os.path.exists(os.path.join(expectations_root, os.pardir, '.git'))) # If dry_run is False, execute subprocess.call(cmd). # If dry_run is True, print the command we would have otherwise run. # Raises a CommandFailedException if the command fails. def _Call(self, cmd): if self._dry_run: print '%s' % ' '.join(cmd) return if subprocess.call(cmd) != 0: raise CommandFailedException('error running command: ' + ' '.join(cmd)) # Download a single actual result from GoogleStorage. # Raises an exception if it fails. def _DownloadFromGoogleStorage(self, infilename, outfilename, all_results): test_name = self._testname_pattern.match(infilename).group(1) if not test_name: raise Exception('unable to find test_name for infilename %s' % infilename) try: hash_type, hash_value = all_results[infilename] except KeyError: raise Exception('unable to find filename %s in all_results dict' % infilename) except ValueError as e: raise Exception( 'ValueError reading filename %s from all_results dict: %s' % ( infilename, e)) url = '%s/%s/%s/%s.png' % (self._googlestorage_gm_actuals_root, hash_type, test_name, hash_value) try: self._DownloadFile(source_url=url, dest_filename=outfilename) except CommandFailedException: raise Exception('Couldn\'t fetch gs_url %s as outfile %s' % ( url, outfilename)) # Download a single file, raising a CommandFailedException if it fails. def _DownloadFile(self, source_url, dest_filename): # Download into a temporary file and then rename it afterwards, # so that we don't corrupt the existing file if it fails midway thru. temp_filename = os.path.join(os.path.dirname(dest_filename), '.temp-' + os.path.basename(dest_filename)) # TODO(epoger): Replace calls to "curl"/"mv" (which will only work on # Unix) with a Python HTTP library (which should work cross-platform) self._Call([ 'curl', '--fail', '--silent', source_url, '--output', temp_filename ]) self._Call([ 'mv', temp_filename, dest_filename ]) # Returns the full contents of a URL, as a single string. # # Unlike standard URL handling, we allow relative "file:" URLs; # for example, "file:one/two" resolves to the file ./one/two # (relative to current working dir) def _GetContentsOfUrl(self, url): file_prefix = 'file:' if url.startswith(file_prefix): filename = url[len(file_prefix):] return open(filename, 'r').read() else: return urllib2.urlopen(url).read() # Returns a dictionary of actual results from actual-results.json file. # # The dictionary returned has this format: # { # u'imageblur_565.png': [u'bitmap-64bitMD5', 3359963596899141322], # u'imageblur_8888.png': [u'bitmap-64bitMD5', 4217923806027861152], # u'shadertext3_8888.png': [u'bitmap-64bitMD5', 3713708307125704716] # } # # If the JSON actual result summary file cannot be loaded, the behavior # depends on self._missing_json_is_fatal: # - if true: execution will halt with an exception # - if false: we will log an error message but return an empty dictionary # # params: # json_url: URL pointing to a JSON actual result summary file # sections: a list of section names to include in the results, e.g. # [gm_json.JSONKEY_ACTUALRESULTS_FAILED, # gm_json.JSONKEY_ACTUALRESULTS_NOCOMPARISON] ; # if None, then include ALL sections. def _GetActualResults(self, json_url, sections=None): try: json_contents = self._GetContentsOfUrl(json_url) except (urllib2.HTTPError, IOError): message = 'unable to load JSON summary URL %s' % json_url if self._missing_json_is_fatal: raise ValueError(message) else: print '# %s' % message return {} json_dict = gm_json.LoadFromString(json_contents) results_to_return = {} actual_results = json_dict[gm_json.JSONKEY_ACTUALRESULTS] if not sections: sections = actual_results.keys() for section in sections: section_results = actual_results[section] if section_results: results_to_return.update(section_results) return results_to_return # Returns a list of files that require rebaselining. # # Note that this returns a list of FILES, like this: # ['imageblur_565.png', 'xfermodes_pdf.png'] # rather than a list of TESTS, like this: # ['imageblur', 'xfermodes'] # # params: # json_url: URL pointing to a JSON actual result summary file # add_new: if True, then return files listed in any of these sections: # - JSONKEY_ACTUALRESULTS_FAILED # - JSONKEY_ACTUALRESULTS_NOCOMPARISON # if False, then return files listed in these sections: # - JSONKEY_ACTUALRESULTS_FAILED # def _GetFilesToRebaseline(self, json_url, add_new): if self._dry_run: print '' print '#' print ('# Getting files to rebaseline from JSON summary URL %s ...' % json_url) sections = [gm_json.JSONKEY_ACTUALRESULTS_FAILED] if add_new: sections.append(gm_json.JSONKEY_ACTUALRESULTS_NOCOMPARISON) results_to_rebaseline = self._GetActualResults(json_url=json_url, sections=sections) files_to_rebaseline = results_to_rebaseline.keys() files_to_rebaseline.sort() print '# ... found files_to_rebaseline %s' % files_to_rebaseline if self._dry_run: print '#' return files_to_rebaseline # Rebaseline a single file. def _RebaselineOneFile(self, expectations_subdir, builder_name, infilename, outfilename, all_results): if self._dry_run: print '' print '# ' + infilename # Download this result image from Google Storage. # If it fails, an exception will be raised. self._DownloadFromGoogleStorage(infilename=infilename, outfilename=outfilename, all_results=all_results) # Add this file to version control (if appropriate). if self._add_new: if self._is_svn_checkout: cmd = [ 'svn', 'add', '--quiet', outfilename ] self._Call(cmd) cmd = [ 'svn', 'propset', '--quiet', 'svn:mime-type', 'image/png', outfilename ]; self._Call(cmd) elif self._is_git_checkout: cmd = [ 'git', 'add', outfilename ] self._Call(cmd) # Rebaseline all tests/types we specified in the constructor, # within this gm-expectations subdir. # # params: # subdir : e.g. 'base-shuttle-win7-intel-float' # builder : e.g. 'Test-Win7-ShuttleA-HD2000-x86-Release' def RebaselineSubdir(self, subdir, builder): if not os.path.isdir(os.path.join(self._expectations_root, subdir)): raise Exception(( 'Could not find "%s" subdir within expectations_root "%s". ' + 'Are you sure --expectations-root is pointing at a valid ' + 'gm-expected directory?') % (subdir, self._expectations_root)) json_url = '/'.join([self._json_base_url, subdir, builder, subdir, self._json_filename]) all_results = self._GetActualResults(json_url=json_url) filenames = self._GetFilesToRebaseline(json_url=json_url, add_new=self._add_new) skipped_files = [] for filename in filenames: (test, config) = self._testname_pattern.match(filename).groups() if self._tests: if test not in self._tests: skipped_files.append(filename) continue if self._configs: if config not in self._configs: skipped_files.append(filename) continue outfilename = os.path.join(self._expectations_root, subdir, filename); # TODO(epoger): Until we resolve # https://code.google.com/p/skia/issues/detail?id=1410 ('some GM # result images not available for download from Google Storage'), # keep going in the face of missing results for any one test. try: self._RebaselineOneFile(expectations_subdir=subdir, builder_name=builder, infilename=filename, outfilename=outfilename, all_results=all_results) except Exception as e: print 'WARNING: swallowing exception %s' % e