Remove unused V8 integration code in Sky

sky/engine/bindings/scripts/utilities.py

-# Copyright 2014 The Chromium Authors. All rights reserved.
-# Use of this source code is governed by a BSD-style license that can be
-# found in the LICENSE file.
-
-"""Utility functions (file reading, simple IDL parsing by regexes) for IDL build.
-
-Design doc: http://www.chromium.org/developers/design-documents/idl-build
-"""
-
-import os
-import cPickle as pickle
-import re
-import string
-import subprocess
-
-
-class IdlBadFilenameError(Exception):
-    """Raised if an IDL filename disagrees with the interface name in the file."""
-    pass
-
-
-def idl_filename_to_interface_name(idl_filename):
-    # interface name is the root of the basename: InterfaceName.idl
-    return os.path.splitext(os.path.basename(idl_filename))[0]
-
-
-################################################################################
-# Basic file reading/writing
-################################################################################
-
-def get_file_contents(filename):
-    with open(filename) as f:
-        return f.read()
-
-
-def read_file_to_list(filename):
-    """Returns a list of (stripped) lines for a given filename."""
-    with open(filename) as f:
-        return [line.rstrip('\n') for line in f]
-
-
-def resolve_cygpath(cygdrive_names):
-    if not cygdrive_names:
-        return []
-    cmd = ['cygpath', '-f', '-', '-wa']
-    process = subprocess.Popen(cmd, stdin=subprocess.PIPE, stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
-    idl_file_names = []
-    for file_name in cygdrive_names:
-        process.stdin.write('%s\n' % file_name)
-        process.stdin.flush()
-        idl_file_names.append(process.stdout.readline().rstrip())
-    process.stdin.close()
-    process.wait()
-    return idl_file_names
-
-
-def read_idl_files_list_from_file(filename):
-    """Similar to read_file_to_list, but also resolves cygpath."""
-    with open(filename) as input_file:
-        file_names = sorted([os.path.realpath(line.rstrip('\n'))
-                             for line in input_file])
-        idl_file_names = [file_name for file_name in file_names
-                          if not file_name.startswith('/cygdrive')]
-        cygdrive_names = [file_name for file_name in file_names
-                          if file_name.startswith('/cygdrive')]
-        idl_file_names.extend(resolve_cygpath(cygdrive_names))
-        return idl_file_names
-
-
-def read_pickle_files(pickle_filenames):
-    for pickle_filename in pickle_filenames:
-        with open(pickle_filename) as pickle_file:
-            yield pickle.load(pickle_file)
-
-
-def write_file(new_text, destination_filename, only_if_changed):
-    if only_if_changed and os.path.isfile(destination_filename):
-        with open(destination_filename) as destination_file:
-            if destination_file.read() == new_text:
-                return
-    destination_dirname = os.path.dirname(destination_filename)
-    if not os.path.exists(destination_dirname):
-        os.makedirs(destination_dirname)
-    with open(destination_filename, 'w') as destination_file:
-        destination_file.write(new_text)
-
-
-def write_pickle_file(pickle_filename, data, only_if_changed):
-    if only_if_changed and os.path.isfile(pickle_filename):
-        with open(pickle_filename) as pickle_file:
-            try:
-                if pickle.load(pickle_file) == data:
-                    return
-            except (EOFError, pickle.UnpicklingError):
-                # If trouble unpickling, overwrite
-                pass
-    with open(pickle_filename, 'w') as pickle_file:
-        pickle.dump(data, pickle_file)
-
-
-################################################################################
-# IDL parsing
-#
-# We use regular expressions for parsing; this is incorrect (Web IDL is not a
-# regular language), but simple and sufficient in practice.
-# Leading and trailing context (e.g. following '{') used to avoid false matches.
-################################################################################
-
-def get_partial_interface_name_from_idl(file_contents):
-    match = re.search(r'partial\s+interface\s+(\w+)\s*{', file_contents)
-    return match and match.group(1)
-
-
-def get_implements_from_idl(file_contents, interface_name):
-    """Returns lists of implementing and implemented interfaces.
-
-    Rule is: identifier-A implements identifier-B;
-    i.e., implement*ing* implements implement*ed*;
-    http://www.w3.org/TR/WebIDL/#idl-implements-statements
-
-    Returns two lists of interfaces: identifier-As and identifier-Bs.
-    An 'implements' statements can be present in the IDL file for either the
-    implementing or the implemented interface, but not other files.
-    """
-    implements_re = (r'^\s*'
-                     r'(\w+)\s+'
-                     r'implements\s+'
-                     r'(\w+)\s*'
-                     r';')
-    implements_matches = re.finditer(implements_re, file_contents, re.MULTILINE)
-    implements_pairs = [match.groups() for match in implements_matches]
-
-    foreign_implements = [pair for pair in implements_pairs
-                          if interface_name not in pair]
-    if foreign_implements:
-        left, right = foreign_implements.pop()
-        raise IdlBadFilenameError(
-                'implements statement found in unrelated IDL file.\n'
-                'Statement is:\n'
-                '    %s implements %s;\n'
-                'but filename is unrelated "%s.idl"' %
-                (left, right, interface_name))
-
-    return (
-        [left for left, right in implements_pairs if right == interface_name],
-        [right for left, right in implements_pairs if left == interface_name])
-
-
-def is_callback_interface_from_idl(file_contents):
-    match = re.search(r'callback\s+interface\s+\w+\s*{', file_contents)
-    return bool(match)
-
-
-def is_dictionary_from_idl(file_contents):
-    match = re.search(r'dictionary\s+\w+\s*{', file_contents)
-    return bool(match)
-
-
-def get_parent_interface(file_contents):
-    match = re.search(r'interface\s+'
-                      r'\w+\s*'
-                      r':\s*(\w+)\s*'
-                      r'{',
-                      file_contents)
-    return match and match.group(1)
-
-
-def get_interface_extended_attributes_from_idl(file_contents):
-    # Strip comments
-    # re.compile needed b/c Python 2.6 doesn't support flags in re.sub
-    single_line_comment_re = re.compile(r'//.*$', flags=re.MULTILINE)
-    block_comment_re = re.compile(r'/\*.*?\*/', flags=re.MULTILINE | re.DOTALL)
-    file_contents = re.sub(single_line_comment_re, '', file_contents)
-    file_contents = re.sub(block_comment_re, '', file_contents)
-
-    match = re.search(r'\[(.*)\]\s*'
-                      r'((callback|partial)\s+)?'
-                      r'(interface|exception)\s+'
-                      r'\w+\s*'
-                      r'(:\s*\w+\s*)?'
-                      r'{',
-                      file_contents, flags=re.DOTALL)
-    if not match:
-        return {}
-
-    extended_attributes_string = match.group(1)
-    extended_attributes = {}
-    # FIXME: this splitting is WRONG: it fails on extended attributes where lists of
-    # multiple values are used, which are seperated by a comma and a space.
-    parts = [extended_attribute.strip()
-             for extended_attribute in re.split(',\s+', extended_attributes_string)
-             # Discard empty parts, which may exist due to trailing comma
-             if extended_attribute.strip()]
-    for part in parts:
-        name, _, value = map(string.strip, part.partition('='))
-        extended_attributes[name] = value
-    return extended_attributes
-
-
-def get_put_forward_interfaces_from_idl(file_contents):
-    put_forwards_pattern = (r'\[[^\]]*PutForwards=[^\]]*\]\s+'
-                            r'readonly\s+'
-                            r'attribute\s+'
-                            r'(\w+)')
-    return sorted(set(match.group(1)
-                      for match in re.finditer(put_forwards_pattern,
-                                               file_contents,
-                                               flags=re.DOTALL)))