| # Copyright (C) 2013 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 os |
| |
| # NOTE: This has only been used to parse |
| # core/page/RuntimeEnabledFeatures.in and may not be capable |
| # of parsing other .in files correctly. |
| |
| # .in file format is: |
| # // comment |
| # name1 arg=value, arg2=value2, arg2=value3 |
| # |
| # InFile must be passed a dictionary of default values |
| # with which to validate arguments against known names. |
| # Sequence types as default values will produce sequences |
| # as parse results. |
| # Bare arguments (no '=') are treated as names with value True. |
| # The first field will always be labeled 'name'. |
| # |
| # InFile.load_from_files(['file.in'], {'arg': None, 'arg2': []}) |
| # |
| # Parsing produces an array of dictionaries: |
| # [ { 'name' : 'name1', 'arg' :' value', arg2=['value2', 'value3'] } |
| |
| def _is_comment(line): |
| return line.startswith("//") or line.startswith("#") |
| |
| class InFile(object): |
| def __init__(self, lines, defaults, valid_values=None, default_parameters=None): |
| self.name_dictionaries = [] |
| self.parameters = copy.deepcopy(default_parameters if default_parameters else {}) |
| self._defaults = defaults |
| self._valid_values = copy.deepcopy(valid_values if valid_values else {}) |
| self._parse(map(str.strip, lines)) |
| |
| @classmethod |
| def load_from_files(self, file_paths, defaults, valid_values, default_parameters): |
| lines = [] |
| for path in file_paths: |
| with open(os.path.abspath(path)) as in_file: |
| lines += in_file.readlines() |
| return InFile(lines, defaults, valid_values, default_parameters) |
| |
| def _is_sequence(self, arg): |
| return (not hasattr(arg, "strip") |
| and hasattr(arg, "__getitem__") |
| or hasattr(arg, "__iter__")) |
| |
| def _parse(self, lines): |
| parsing_parameters = True |
| indices = {} |
| for line in lines: |
| if _is_comment(line): |
| continue |
| if not line: |
| parsing_parameters = False |
| continue |
| if parsing_parameters: |
| self._parse_parameter(line) |
| else: |
| entry = self._parse_line(line) |
| name = entry['name'] |
| if name in indices: |
| entry = self._merge_entries(entry, self.name_dictionaries[indices[name]]) |
| entry['name'] = name |
| self.name_dictionaries[indices[name]] = entry |
| else: |
| indices[name] = len(self.name_dictionaries) |
| self.name_dictionaries.append(entry) |
| |
| |
| def _merge_entries(self, one, two): |
| merged = {} |
| for key in one: |
| if key not in two: |
| self._fatal("Expected key '%s' not found in entry: %s" % (key, two)) |
| if one[key] and two[key]: |
| val_one = one[key] |
| val_two = two[key] |
| if isinstance(val_one, list) and isinstance(val_two, list): |
| val = val_one + val_two |
| elif isinstance(val_one, list): |
| val = val_one + [val_two] |
| elif isinstance(val_two, list): |
| val = [val_one] + val_two |
| else: |
| val = [val_one, val_two] |
| merged[key] = val |
| elif one[key]: |
| merged[key] = one[key] |
| else: |
| merged[key] = two[key] |
| return merged |
| |
| |
| def _parse_parameter(self, line): |
| if '=' in line: |
| name, value = line.split('=') |
| else: |
| name, value = line, True |
| if not name in self.parameters: |
| self._fatal("Unknown parameter: '%s' in line:\n%s\nKnown parameters: %s" % (name, line, self.parameters.keys())) |
| self.parameters[name] = value |
| |
| def _parse_line(self, line): |
| args = copy.deepcopy(self._defaults) |
| parts = line.split(' ') |
| args['name'] = parts[0] |
| # re-join the rest of the line and split on ',' |
| args_list = ' '.join(parts[1:]).strip().split(',') |
| for arg_string in args_list: |
| arg_string = arg_string.strip() |
| if not arg_string: # Ignore empty args |
| continue |
| if '=' in arg_string: |
| arg_name, arg_value = arg_string.split('=') |
| else: |
| arg_name, arg_value = arg_string, True |
| if arg_name not in self._defaults: |
| self._fatal("Unknown argument: '%s' in line:\n%s\nKnown arguments: %s" % (arg_name, line, self._defaults.keys())) |
| valid_values = self._valid_values.get(arg_name) |
| if valid_values and arg_value not in valid_values: |
| self._fatal("Unknown value: '%s' in line:\n%s\nKnown values: %s" % (arg_value, line, valid_values)) |
| if self._is_sequence(args[arg_name]): |
| args[arg_name].append(arg_value) |
| else: |
| args[arg_name] = arg_value |
| return args |
| |
| def _fatal(self, message): |
| # FIXME: This should probably raise instead of exit(1) |
| print message |
| exit(1) |
