| # Copyright (C) 2011, Google Inc. All rights reserved. |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| import copy |
| import logging |
| import functools |
| |
| from webkitpy.common.memoized import memoized |
| |
| _log = logging.getLogger(__name__) |
| |
| |
| class BaselineOptimizer(object): |
| ROOT_LAYOUT_TESTS_DIRECTORY = 'LayoutTests' |
| |
| def __init__(self, host, port, port_names): |
| self._filesystem = host.filesystem |
| self._default_port = port |
| self._ports = {} |
| for port_name in port_names: |
| self._ports[port_name] = host.port_factory.get(port_name) |
| |
| self._webkit_base = port.webkit_base() |
| self._layout_tests_dir = port.layout_tests_dir() |
| |
| # Only used by unit tests. |
| self.new_results_by_directory = [] |
| |
| def optimize(self, baseline_name): |
| # The virtual fallback path is the same as the non-virtual one |
| # tacked on to the bottom of the non-virtual path. See |
| # https://docs.google.com/a/chromium.org/drawings/d/1eGdsIKzJ2dxDDBbUaIABrN4aMLD1bqJTfyxNGZsTdmg/edit |
| # for a visual representation of this. |
| # So, we can optimize the virtual path, then the virtual root, and then |
| # the regular path. |
| |
| _log.debug('Optimizing regular fallback path.') |
| result = self._optimize_subtree(baseline_name) |
| non_virtual_baseline_name = self._virtual_base(baseline_name) |
| if not non_virtual_baseline_name: |
| return result |
| |
| self._optimize_virtual_root(baseline_name, non_virtual_baseline_name) |
| |
| _log.debug('Optimizing non-virtual fallback path.') |
| result |= self._optimize_subtree(non_virtual_baseline_name) |
| return result |
| |
| def write_by_directory(self, results_by_directory, writer, indent): |
| for path in sorted(results_by_directory): |
| writer('%s%s: %s' % (indent, self._platform(path), results_by_directory[path][0:6])) |
| |
| def read_results_by_directory(self, baseline_name): |
| results_by_directory = {} |
| directories = functools.reduce(set.union, map(set, [self._relative_baseline_search_paths( |
| port, baseline_name) for port in self._ports.values()])) |
| |
| for directory in directories: |
| path = self._join_directory(directory, baseline_name) |
| if self._filesystem.exists(path): |
| results_by_directory[directory] = self._filesystem.sha1(path) |
| return results_by_directory |
| |
| def _optimize_subtree(self, baseline_name): |
| basename = self._filesystem.basename(baseline_name) |
| results_by_directory, new_results_by_directory = self._find_optimal_result_placement(baseline_name) |
| |
| if new_results_by_directory == results_by_directory: |
| if new_results_by_directory: |
| _log.debug(' %s: (already optimal)', basename) |
| self.write_by_directory(results_by_directory, _log.debug, ' ') |
| else: |
| _log.debug(' %s: (no baselines found)', basename) |
| # This is just used for unit tests. |
| # Intentionally set it to the old data if we don't modify anything. |
| self.new_results_by_directory.append(results_by_directory) |
| return True |
| |
| if (self._results_by_port_name(results_by_directory, baseline_name) != |
| self._results_by_port_name(new_results_by_directory, baseline_name)): |
| # This really should never happen. Just a sanity check to make |
| # sure the script fails in the case of bugs instead of committing |
| # incorrect baselines. |
| _log.error(' %s: optimization failed', basename) |
| self.write_by_directory(results_by_directory, _log.warning, ' ') |
| return False |
| |
| _log.debug(' %s:', basename) |
| _log.debug(' Before: ') |
| self.write_by_directory(results_by_directory, _log.debug, ' ') |
| _log.debug(' After: ') |
| self.write_by_directory(new_results_by_directory, _log.debug, ' ') |
| |
| self._move_baselines(baseline_name, results_by_directory, new_results_by_directory) |
| return True |
| |
| def _move_baselines(self, baseline_name, results_by_directory, new_results_by_directory): |
| data_for_result = {} |
| for directory, result in results_by_directory.items(): |
| if result not in data_for_result: |
| source = self._join_directory(directory, baseline_name) |
| data_for_result[result] = self._filesystem.read_binary_file(source) |
| |
| fs_files = [] |
| for directory, result in results_by_directory.items(): |
| if new_results_by_directory.get(directory) != result: |
| file_name = self._join_directory(directory, baseline_name) |
| if self._filesystem.exists(file_name): |
| fs_files.append(file_name) |
| |
| if fs_files: |
| _log.debug(' Deleting (file system):') |
| for platform_dir in sorted(self._platform(filename) for filename in fs_files): |
| _log.debug(' ' + platform_dir) |
| for filename in fs_files: |
| self._filesystem.remove(filename) |
| else: |
| _log.debug(' (Nothing to delete)') |
| |
| file_names = [] |
| for directory, result in new_results_by_directory.items(): |
| if results_by_directory.get(directory) != result: |
| destination = self._join_directory(directory, baseline_name) |
| self._filesystem.maybe_make_directory(self._filesystem.split(destination)[0]) |
| self._filesystem.write_binary_file(destination, data_for_result[result]) |
| file_names.append(destination) |
| |
| if file_names: |
| _log.debug(' Adding:') |
| for platform_dir in sorted(self._platform(filename) for filename in file_names): |
| _log.debug(' ' + platform_dir) |
| else: |
| _log.debug(' (Nothing to add)') |
| |
| def _platform(self, filename): |
| platform_dir = self.ROOT_LAYOUT_TESTS_DIRECTORY + self._filesystem.sep + 'platform' + self._filesystem.sep |
| if filename.startswith(platform_dir): |
| return filename.replace(platform_dir, '').split(self._filesystem.sep)[0] |
| platform_dir = self._filesystem.join(self._webkit_base, platform_dir) |
| if filename.startswith(platform_dir): |
| return filename.replace(platform_dir, '').split(self._filesystem.sep)[0] |
| return '(generic)' |
| |
| def _optimize_virtual_root(self, baseline_name, non_virtual_baseline_name): |
| virtual_root_baseline_path = self._filesystem.join(self._layout_tests_dir, baseline_name) |
| if not self._filesystem.exists(virtual_root_baseline_path): |
| return |
| root_sha1 = self._filesystem.sha1(virtual_root_baseline_path) |
| |
| results_by_directory = self.read_results_by_directory(non_virtual_baseline_name) |
| # See if all the immediate predecessors of the virtual root have the same expected result. |
| for port in self._ports.values(): |
| directories = self._relative_baseline_search_paths(port, non_virtual_baseline_name) |
| for directory in directories: |
| if directory not in results_by_directory: |
| continue |
| if results_by_directory[directory] != root_sha1: |
| return |
| break |
| |
| _log.debug('Deleting redundant virtual root expected result.') |
| _log.debug(' Deleting (file system): ' + virtual_root_baseline_path) |
| self._filesystem.remove(virtual_root_baseline_path) |
| |
| def _baseline_root(self, baseline_name): |
| virtual_suite = self._virtual_suite(baseline_name) |
| if virtual_suite: |
| return self._filesystem.join(self.ROOT_LAYOUT_TESTS_DIRECTORY, virtual_suite.name) |
| return self.ROOT_LAYOUT_TESTS_DIRECTORY |
| |
| def _baseline_search_path(self, port, baseline_name): |
| virtual_suite = self._virtual_suite(baseline_name) |
| if virtual_suite: |
| return port.virtual_baseline_search_path(baseline_name) |
| return port.baseline_search_path() |
| |
| def _virtual_suite(self, baseline_name): |
| return self._default_port.lookup_virtual_suite(baseline_name) |
| |
| def _virtual_base(self, baseline_name): |
| return self._default_port.lookup_virtual_test_base(baseline_name) |
| |
| def _relative_baseline_search_paths(self, port, baseline_name): |
| """Returns a list of paths to check for baselines in order.""" |
| baseline_search_path = self._baseline_search_path(port, baseline_name) |
| baseline_root = self._baseline_root(baseline_name) |
| relative_paths = [self._filesystem.relpath(path, self._webkit_base) for path in baseline_search_path] |
| return relative_paths + [baseline_root] |
| |
| def _join_directory(self, directory, baseline_name): |
| # This code is complicated because both the directory name and the |
| # baseline_name have the virtual test suite in the name and the virtual |
| # baseline name is not a strict superset of the non-virtual name. |
| # For example, virtual/gpu/fast/canvas/foo-expected.png corresponds to |
| # fast/canvas/foo-expected.png and the baseline directories are like |
| # platform/mac/virtual/gpu/fast/canvas. So, to get the path to the |
| # baseline in the platform directory, we need to append just |
| # foo-expected.png to the directory. |
| virtual_suite = self._virtual_suite(baseline_name) |
| if virtual_suite: |
| baseline_name_without_virtual = baseline_name[len(virtual_suite.name) + 1:] |
| else: |
| baseline_name_without_virtual = baseline_name |
| return self._filesystem.join(self._webkit_base, directory, baseline_name_without_virtual) |
| |
| def _results_by_port_name(self, results_by_directory, baseline_name): |
| results_by_port_name = {} |
| for port_name, port in self._ports.items(): |
| for directory in self._relative_baseline_search_paths(port, baseline_name): |
| if directory in results_by_directory: |
| results_by_port_name[port_name] = results_by_directory[directory] |
| break |
| return results_by_port_name |
| |
| @memoized |
| def _directories_immediately_preceding_root(self, baseline_name): |
| directories = set() |
| for port in self._ports.values(): |
| directory = self._filesystem.relpath(self._baseline_search_path(port, baseline_name)[-1], self._webkit_base) |
| directories.add(directory) |
| return directories |
| |
| def _optimize_result_for_root(self, new_results_by_directory, baseline_name): |
| # The root directory (i.e. LayoutTests) is the only one that doesn't correspond |
| # to a specific platform. As such, it's the only one where the baseline in fallback directories |
| # immediately before it can be promoted up, i.e. if win and mac |
| # have the same baseline, then it can be promoted up to be the LayoutTests baseline. |
| # All other baselines can only be removed if they're redundant with a baseline earlier |
| # in the fallback order. They can never promoted up. |
| immediately_preceding_root = self._directories_immediately_preceding_root(baseline_name) |
| |
| shared_result = None |
| root_baseline_unused = False |
| for directory in immediately_preceding_root: |
| this_result = new_results_by_directory.get(directory) |
| |
| # If any of these directories don't have a baseline, there's no optimization we can do. |
| if not this_result: |
| return |
| |
| if not shared_result: |
| shared_result = this_result |
| elif shared_result != this_result: |
| root_baseline_unused = True |
| |
| baseline_root = self._baseline_root(baseline_name) |
| |
| # The root baseline is unused if all the directories immediately preceding the root |
| # have a baseline, but have different baselines, so the baselines can't be promoted up. |
| if root_baseline_unused: |
| if baseline_root in new_results_by_directory: |
| del new_results_by_directory[baseline_root] |
| return |
| |
| new_results_by_directory[baseline_root] = shared_result |
| for directory in immediately_preceding_root: |
| del new_results_by_directory[directory] |
| |
| def _find_optimal_result_placement(self, baseline_name): |
| results_by_directory = self.read_results_by_directory(baseline_name) |
| results_by_port_name = self._results_by_port_name(results_by_directory, baseline_name) |
| |
| new_results_by_directory = self._remove_redundant_results( |
| results_by_directory, results_by_port_name, baseline_name) |
| self._optimize_result_for_root(new_results_by_directory, baseline_name) |
| |
| return results_by_directory, new_results_by_directory |
| |
| def _remove_redundant_results(self, results_by_directory, results_by_port_name, baseline_name): |
| new_results_by_directory = copy.copy(results_by_directory) |
| for port_name, port in self._ports.items(): |
| current_result = results_by_port_name.get(port_name) |
| |
| # This happens if we're missing baselines for a port. |
| if not current_result: |
| continue |
| |
| fallback_path = self._relative_baseline_search_paths(port, baseline_name) |
| current_index, current_directory = self._find_in_fallbackpath(fallback_path, current_result, new_results_by_directory) |
| for index in range(current_index + 1, len(fallback_path)): |
| new_directory = fallback_path[index] |
| if new_directory not in new_results_by_directory: |
| # No result for this baseline in this directory. |
| continue |
| elif new_results_by_directory[new_directory] == current_result: |
| # Result for new_directory are redundant with the result earlier in the fallback order. |
| if current_directory in new_results_by_directory: |
| del new_results_by_directory[current_directory] |
| else: |
| # The new_directory contains a different result, so stop trying to push results up. |
| break |
| |
| return new_results_by_directory |
| |
| def _find_in_fallbackpath(self, fallback_path, current_result, results_by_directory): |
| for index, directory in enumerate(fallback_path): |
| if directory in results_by_directory and (results_by_directory[directory] == current_result): |
| return index, directory |
| assert False, 'result %s not found in fallback_path %s, %s' % (current_result, fallback_path, results_by_directory) |
