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| 1 # Copyright (C) 2013 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 copy | |
| 30 import os | |
| 31 | |
| 32 # NOTE: This has only been used to parse | |
| 33 # core/page/RuntimeEnabledFeatures.in and may not be capable | |
| 34 # of parsing other .in files correctly. | |
| 35 | |
| 36 # .in file format is: | |
| 37 # // comment | |
| 38 # name1 arg=value, arg2=value2, arg2=value3 | |
| 39 # | |
| 40 # InFile must be passed a dictionary of default values | |
| 41 # with which to validate arguments against known names. | |
| 42 # Sequence types as default values will produce sequences | |
| 43 # as parse results. | |
| 44 # Bare arguments (no '=') are treated as names with value True. | |
| 45 # The first field will always be labeled 'name'. | |
| 46 # | |
| 47 # InFile.load_from_files(['file.in'], {'arg': None, 'arg2': []}) | |
| 48 # | |
| 49 # Parsing produces an array of dictionaries: | |
| 50 # [ { 'name' : 'name1', 'arg' :' value', arg2=['value2', 'value3'] } | |
| 51 | |
| 52 def _is_comment(line): | |
| 53 return line.startswith("//") or line.startswith("#") | |
| 54 | |
| 55 class InFile(object): | |
| 56 def __init__(self, lines, defaults, valid_values=None, default_parameters=No
ne): | |
| 57 self.name_dictionaries = [] | |
| 58 self.parameters = copy.deepcopy(default_parameters if default_parameters
else {}) | |
| 59 self._defaults = defaults | |
| 60 self._valid_values = copy.deepcopy(valid_values if valid_values else {}) | |
| 61 self._parse(map(str.strip, lines)) | |
| 62 | |
| 63 @classmethod | |
| 64 def load_from_files(self, file_paths, defaults, valid_values, default_parame
ters): | |
| 65 lines = [] | |
| 66 for path in file_paths: | |
| 67 with open(os.path.abspath(path)) as in_file: | |
| 68 lines += in_file.readlines() | |
| 69 return InFile(lines, defaults, valid_values, default_parameters) | |
| 70 | |
| 71 def _is_sequence(self, arg): | |
| 72 return (not hasattr(arg, "strip") | |
| 73 and hasattr(arg, "__getitem__") | |
| 74 or hasattr(arg, "__iter__")) | |
| 75 | |
| 76 def _parse(self, lines): | |
| 77 parsing_parameters = True | |
| 78 indices = {} | |
| 79 for line in lines: | |
| 80 if _is_comment(line): | |
| 81 continue | |
| 82 if not line: | |
| 83 parsing_parameters = False | |
| 84 continue | |
| 85 if parsing_parameters: | |
| 86 self._parse_parameter(line) | |
| 87 else: | |
| 88 entry = self._parse_line(line) | |
| 89 name = entry['name'] | |
| 90 if name in indices: | |
| 91 entry = self._merge_entries(entry, self.name_dictionaries[in
dices[name]]) | |
| 92 entry['name'] = name | |
| 93 self.name_dictionaries[indices[name]] = entry | |
| 94 else: | |
| 95 indices[name] = len(self.name_dictionaries) | |
| 96 self.name_dictionaries.append(entry) | |
| 97 | |
| 98 | |
| 99 def _merge_entries(self, one, two): | |
| 100 merged = {} | |
| 101 for key in one: | |
| 102 if key not in two: | |
| 103 self._fatal("Expected key '%s' not found in entry: %s" % (key, t
wo)) | |
| 104 if one[key] and two[key]: | |
| 105 val_one = one[key] | |
| 106 val_two = two[key] | |
| 107 if isinstance(val_one, list) and isinstance(val_two, list): | |
| 108 val = val_one + val_two | |
| 109 elif isinstance(val_one, list): | |
| 110 val = val_one + [val_two] | |
| 111 elif isinstance(val_two, list): | |
| 112 val = [val_one] + val_two | |
| 113 else: | |
| 114 val = [val_one, val_two] | |
| 115 merged[key] = val | |
| 116 elif one[key]: | |
| 117 merged[key] = one[key] | |
| 118 else: | |
| 119 merged[key] = two[key] | |
| 120 return merged | |
| 121 | |
| 122 | |
| 123 def _parse_parameter(self, line): | |
| 124 if '=' in line: | |
| 125 name, value = line.split('=') | |
| 126 else: | |
| 127 name, value = line, True | |
| 128 if not name in self.parameters: | |
| 129 self._fatal("Unknown parameter: '%s' in line:\n%s\nKnown parameters:
%s" % (name, line, self.parameters.keys())) | |
| 130 self.parameters[name] = value | |
| 131 | |
| 132 def _parse_line(self, line): | |
| 133 args = copy.deepcopy(self._defaults) | |
| 134 parts = line.split(' ') | |
| 135 args['name'] = parts[0] | |
| 136 # re-join the rest of the line and split on ',' | |
| 137 args_list = ' '.join(parts[1:]).strip().split(',') | |
| 138 for arg_string in args_list: | |
| 139 arg_string = arg_string.strip() | |
| 140 if not arg_string: # Ignore empty args | |
| 141 continue | |
| 142 if '=' in arg_string: | |
| 143 arg_name, arg_value = arg_string.split('=') | |
| 144 else: | |
| 145 arg_name, arg_value = arg_string, True | |
| 146 if arg_name not in self._defaults: | |
| 147 self._fatal("Unknown argument: '%s' in line:\n%s\nKnown argument
s: %s" % (arg_name, line, self._defaults.keys())) | |
| 148 valid_values = self._valid_values.get(arg_name) | |
| 149 if valid_values and arg_value not in valid_values: | |
| 150 self._fatal("Unknown value: '%s' in line:\n%s\nKnown values: %s"
% (arg_value, line, valid_values)) | |
| 151 if self._is_sequence(args[arg_name]): | |
| 152 args[arg_name].append(arg_value) | |
| 153 else: | |
| 154 args[arg_name] = arg_value | |
| 155 return args | |
| 156 | |
| 157 def _fatal(self, message): | |
| 158 # FIXME: This should probably raise instead of exit(1) | |
| 159 print message | |
| 160 exit(1) | |
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Chromium Code Reviews
Issue 26414004:
Move core/scripts to build/scripts so that platform can use them. (Closed)
Base URL: svn://svn.chromium.org/blink/trunk