1 # Copyright (c) 2012 Google Inc. All rights reserved. 2 # 3 # Redistribution and use in source and binary forms, with or without 4 # modification, are permitted provided that the following conditions are 5 # met: 6 # 7 # * Redistributions of source code must retain the above copyright 8 # notice, this list of conditions and the following disclaimer. 9 # * Redistributions in binary form must reproduce the above 10 # copyright notice, this list of conditions and the following disclaimer 11 # in the documentation and/or other materials provided with the 12 # distribution. 13 # * Neither the name of Google Inc. nor the names of its 14 # contributors may be used to endorse or promote products derived from 15 # this software without specific prior written permission. 16 # 17 # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 21 # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 22 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 23 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 24 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 25 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 26 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 28 29 import os 30 import sys 31 32 33 class WebKitFinder(object): 34 def __init__(self, filesystem): 35 self._filesystem = filesystem 36 self._dirsep = filesystem.sep 37 self._sys_path = sys.path 38 self._env_path = os.environ['PATH'].split(os.pathsep) 39 self._webkit_base = None 40 self._chromium_base = None 41 self._depot_tools = None 42 43 def webkit_base(self): 44 """Returns the absolute path to the top of the WebKit tree. 45 46 Raises an AssertionError if the top dir can't be determined.""" 47 # Note: This code somewhat duplicates the code in 48 # scm.find_checkout_root(). However, that code only works if the top 49 # of the SCM repository also matches the top of the WebKit tree. Some SVN users 50 # (the chromium test bots, for example), might only check out subdirectories like 51 # Tools/Scripts. This code will also work if there is no SCM system at all. 52 if not self._webkit_base: 53 self._webkit_base = self._webkit_base 54 module_path = self._filesystem.abspath(self._filesystem.path_to_module(self.__module__)) 55 tools_index = module_path.rfind('Tools') 56 assert tools_index != -1, "could not find location of this checkout from %s" % module_path 57 self._webkit_base = self._filesystem.normpath(module_path[0:tools_index - 1]) 58 return self._webkit_base 59 60 def chromium_base(self): 61 if not self._chromium_base: 62 self._chromium_base = self._filesystem.dirname(self._filesystem.dirname(self.webkit_base())) 63 return self._chromium_base 64 65 def path_from_webkit_base(self, *comps): 66 return self._filesystem.join(self.webkit_base(), *comps) 67 68 def path_from_chromium_base(self, *comps): 69 return self._filesystem.join(self.chromium_base(), *comps) 70 71 def path_to_script(self, script_name): 72 """Returns the relative path to the script from the top of the WebKit tree.""" 73 # This is intentionally relative in order to force callers to consider what 74 # their current working directory is (and change to the top of the tree if necessary). 75 return self._filesystem.join("Tools", "Scripts", script_name) 76 77 def layout_tests_dir(self): 78 return self.path_from_webkit_base('LayoutTests') 79 80 def perf_tests_dir(self): 81 return self.path_from_webkit_base('PerformanceTests') 82 83 def depot_tools_base(self): 84 if not self._depot_tools: 85 # This basically duplicates src/tools/find_depot_tools.py without the side effects 86 # (adding the directory to sys.path and importing breakpad). 87 self._depot_tools = (self._check_paths_for_depot_tools(self._sys_path) or 88 self._check_paths_for_depot_tools(self._env_path) or 89 self._check_upward_for_depot_tools()) 90 return self._depot_tools 91 92 def _check_paths_for_depot_tools(self, paths): 93 for path in paths: 94 if path.rstrip(self._dirsep).endswith('depot_tools'): 95 return path 96 return None 97 98 def _check_upward_for_depot_tools(self): 99 fs = self._filesystem 100 prev_dir = '' 101 current_dir = fs.dirname(self._webkit_base) 102 while current_dir != prev_dir: 103 if fs.exists(fs.join(current_dir, 'depot_tools', 'pylint.py')): 104 return fs.join(current_dir, 'depot_tools') 105 prev_dir = current_dir 106 current_dir = fs.dirname(current_dir) 107 108 def path_from_depot_tools_base(self, *comps): 109 return self._filesystem.join(self.depot_tools_base(), *comps) 110
