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How to use matching_platform method in tox

Best Python code snippet using tox_python

deduplicate_tests.py

Source:deduplicate_tests.py

1#!/usr/bin/env python2# Copyright (C) 2010 Google Inc. All rights reserved.3#4# Redistribution and use in source and binary forms, with or without5# modification, are permitted provided that the following conditions6# are met:7#8# 1.  Redistributions of source code must retain the above copyright9#     notice, this list of conditions and the following disclaimer.10# 2.  Redistributions in binary form must reproduce the above copyright11#     notice, this list of conditions and the following disclaimer in the12#     documentation and/or other materials provided with the distribution.13#14# THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY15# EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED16# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE17# DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY18# DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES19# (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;20# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND21# ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT22# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF23# THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.24"""deduplicate_tests -- lists duplicated between platforms.25If platform/mac-leopard is missing an expected test output, we fall back on26platform/mac.  This means it's possible to grow redundant test outputs,27where we have the same expected data in both a platform directory and another28platform it falls back on.29"""30import collections31import fnmatch32import os33import subprocess34import sys35import re36from webkitpy.common.checkout import scm37from webkitpy.common.system import executive38from webkitpy.common.system import logutils39from webkitpy.common.system import ospath40from webkitpy.layout_tests.port import factory as port_factory41_log = logutils.get_logger(__file__)42_BASE_PLATFORM = 'base'43def port_fallbacks():44    """Get the port fallback information.45    Returns:46        A dictionary mapping platform name to a list of other platforms to fall47        back on.  All platforms fall back on 'base'.48    """49    fallbacks = {_BASE_PLATFORM: []}50    for port_name in port_factory.all_port_names():51        try:52            platforms = port_factory.get(port_name).baseline_search_path()53        except NotImplementedError:54            _log.error("'%s' lacks baseline_search_path(), please fix."55                       % port_name)56            fallbacks[port_name] = [_BASE_PLATFORM]57            continue58        fallbacks[port_name] = [os.path.basename(p) for p in platforms][1:]59        fallbacks[port_name].append(_BASE_PLATFORM)60    return fallbacks61def parse_git_output(git_output, glob_pattern):62    """Parses the output of git ls-tree and filters based on glob_pattern.63    Args:64        git_output: result of git ls-tree -r HEAD LayoutTests.65        glob_pattern: a pattern to filter the files.66    Returns:67        A dictionary mapping (test name, hash of content) => [paths]68    """69    hashes = collections.defaultdict(set)70    for line in git_output.split('\n'):71        if not line:72            break73        attrs, path = line.strip().split('\t')74        if not fnmatch.fnmatch(path, glob_pattern):75            continue76        path = path[len('LayoutTests/'):]77        match = re.match(r'^(platform/.*?/)?(.*)', path)78        test = match.group(2)79        _, _, hash = attrs.split(' ')80        hashes[(test, hash)].add(path)81    return hashes82def cluster_file_hashes(glob_pattern):83    """Get the hashes of all the test expectations in the tree.84    We cheat and use git's hashes.85    Args:86        glob_pattern: a pattern to filter the files.87    Returns:88        A dictionary mapping (test name, hash of content) => [paths]89    """90    # A map of file hash => set of all files with that hash.91    hashes = collections.defaultdict(set)92    # Fill in the map.93    cmd = ('git', 'ls-tree', '-r', 'HEAD', 'LayoutTests')94    try:95        git_output = executive.Executive().run_command(cmd,96            cwd=scm.find_checkout_root())97    except OSError, e:98        if e.errno == 2:  # No such file or directory.99            _log.error("Error: 'No such file' when running git.")100            _log.error("This script requires git.")101            sys.exit(1)102        raise e103    return parse_git_output(git_output, glob_pattern)104def dirname_to_platform(dirname):105    if dirname == 'chromium-linux':106        return 'chromium-linux-x86'107    elif dirname == 'chromium-win':108        return 'chromium-win-win7'109    elif dirname == 'chromium-mac':110        return 'chromium-mac-snowleopard'111    return dirname112def extract_platforms(paths):113    """Extracts the platforms from a list of paths matching ^platform/(.*?)/.114    Args:115        paths: a list of paths.116    Returns:117        A dictionary containing all platforms from paths.118    """119    platforms = {}120    for path in paths:121        match = re.match(r'^platform/(.*?)/', path)122        if match:123            platform = dirname_to_platform(match.group(1))124        else:125            platform = _BASE_PLATFORM126        platforms[platform] = path127    return platforms128def has_intermediate_results(test, fallbacks, matching_platform,129                             path_exists=os.path.exists):130    """Returns True if there is a test result that causes us to not delete131    this duplicate.132    For example, chromium-linux may be a duplicate of the checked in result,133    but chromium-win may have a different result checked in.  In this case,134    we need to keep the duplicate results.135    Args:136        test: The test name.137        fallbacks: A list of platforms we fall back on.138        matching_platform: The platform that we found the duplicate test139            result.  We can stop checking here.140        path_exists: Optional parameter that allows us to stub out141            os.path.exists for testing.142    """143    for dirname in fallbacks:144        platform = dirname_to_platform(dirname)145        if platform == matching_platform:146            return False147        test_path = os.path.join('LayoutTests', 'platform', dirname, test)148        if path_exists(test_path):149            return True150    return False151def get_relative_test_path(filename, relative_to,152                           checkout_root=scm.find_checkout_root()):153    """Constructs a relative path to |filename| from |relative_to|.154    Args:155        filename: The test file we're trying to get a relative path to.156        relative_to: The absolute path we're relative to.157    Returns:158        A relative path to filename or None if |filename| is not below159        |relative_to|.160    """161    layout_test_dir = os.path.join(checkout_root, 'LayoutTests')162    abs_path = os.path.join(layout_test_dir, filename)163    return ospath.relpath(abs_path, relative_to)164def find_dups(hashes, port_fallbacks, relative_to):165    """Yields info about redundant test expectations.166    Args:167        hashes: a list of hashes as returned by cluster_file_hashes.168        port_fallbacks: a list of fallback information as returned by169            get_port_fallbacks.170        relative_to: the directory that we want the results relative to171    Returns:172        a tuple containing (test, platform, fallback, platforms)173    """174    for (test, hash), cluster in hashes.items():175        if len(cluster) < 2:176            continue  # Common case: only one file with that hash.177        # Compute the list of platforms we have this particular hash for.178        platforms = extract_platforms(cluster)179        if len(platforms) == 1:180            continue181        # See if any of the platforms are redundant with each other.182        for platform in platforms.keys():183            if platform not in port_factory.all_port_names():184                continue185            for dirname in port_fallbacks[platform]:186                fallback = dirname_to_platform(dirname)187                if fallback not in platforms.keys():188                    continue189                # We have to verify that there isn't an intermediate result190                # that causes this duplicate hash to exist.191                if has_intermediate_results(test, port_fallbacks[platform],192                                            fallback):193                    continue194                # We print the relative path so it's easy to pipe the results195                # to xargs rm.196                path = get_relative_test_path(platforms[platform], relative_to)197                if not path:198                    continue199                yield {200                    'test': test,201                    'platform': platform,202                    'fallback': dirname,203                    'path': path,204                }205def deduplicate(glob_pattern):206    """Traverses LayoutTests and returns information about duplicated files.207    Args:208        glob pattern to filter the files in LayoutTests.209    Returns:210        a dictionary containing test, path, platform and fallback.211    """212    fallbacks = port_fallbacks()213    hashes = cluster_file_hashes(glob_pattern)...

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