Removes files from //build that we don't need

build/util/version.py

-#!/usr/bin/env python
-# 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.
-
-"""
-version.py -- Chromium version string substitution utility.
-"""
-
-import argparse
-import os
-import sys
-
-
-def fetch_values_from_file(values_dict, file_name):
-  """
-  Fetches KEYWORD=VALUE settings from the specified file.
-
-  Everything to the left of the first '=' is the keyword,
-  everything to the right is the value.  No stripping of
-  white space, so beware.
-
-  The file must exist, otherwise you get the Python exception from open().
-  """
-  for line in open(file_name, 'r').readlines():
-    key, val = line.rstrip('\r\n').split('=', 1)
-    values_dict[key] = val
-
-
-def fetch_values(file_list):
-  """
-  Returns a dictionary of values to be used for substitution, populating
-  the dictionary with KEYWORD=VALUE settings from the files in 'file_list'.
-
-  Explicitly adds the following value from internal calculations:
-
-    OFFICIAL_BUILD
-  """
-  CHROME_BUILD_TYPE = os.environ.get('CHROME_BUILD_TYPE')
-  if CHROME_BUILD_TYPE == '_official':
-    official_build = '1'
-  else:
-    official_build = '0'
-
-  values = dict(
-    OFFICIAL_BUILD = official_build,
-  )
-
-  for file_name in file_list:
-    fetch_values_from_file(values, file_name)
-
-  return values
-
-
-def subst_template(contents, values):
-  """
-  Returns the template with substituted values from the specified dictionary.
-
-  Keywords to be substituted are surrounded by '@':  @KEYWORD@.
-
-  No attempt is made to avoid recursive substitution.  The order
-  of evaluation is random based on the order of the keywords returned
-  by the Python dictionary.  So do NOT substitute a value that
-  contains any @KEYWORD@ strings expecting them to be recursively
-  substituted, okay?
-  """
-  for key, val in values.iteritems():
-    try:
-      contents = contents.replace('@' + key + '@', val)
-    except TypeError:
-      print repr(key), repr(val)
-  return contents
-
-
-def subst_file(file_name, values):
-  """
-  Returns the contents of the specified file_name with substituted
-  values from the specified dictionary.
-
-  This is like subst_template, except it operates on a file.
-  """
-  template = open(file_name, 'r').read()
-  return subst_template(template, values);
-
-
-def write_if_changed(file_name, contents):
-  """
-  Writes the specified contents to the specified file_name
-  iff the contents are different than the current contents.
-  """
-  try:
-    old_contents = open(file_name, 'r').read()
-  except EnvironmentError:
-    pass
-  else:
-    if contents == old_contents:
-      return
-    os.unlink(file_name)
-  open(file_name, 'w').write(contents)
-
-
-def main():
-  parser = argparse.ArgumentParser()
-  parser.add_argument('-f', '--file', action='append', default=[],
-                      help='Read variables from FILE.')
-  parser.add_argument('-i', '--input', default=None,
-                      help='Read strings to substitute from FILE.')
-  parser.add_argument('-o', '--output', default=None,
-                      help='Write substituted strings to FILE.')
-  parser.add_argument('-t', '--template', default=None,
-                      help='Use TEMPLATE as the strings to substitute.')
-  parser.add_argument('-e', '--eval', action='append', default=[],
-                      help='Evaluate VAL after reading variables. Can be used '
-                           'to synthesize variables. e.g. -e \'PATCH_HI=int('
-                           'PATCH)/256.')
-  parser.add_argument('args', nargs=argparse.REMAINDER,
-                      help='For compatibility: INPUT and OUTPUT can be '
-                           'passed as positional arguments.')
-  options = parser.parse_args()
-
-  evals = {}
-  for expression in options.eval:
-    try:
-      evals.update(dict([expression.split('=', 1)]))
-    except ValueError:
-      parser.error('-e requires VAR=VAL')
-
-  # Compatibility with old versions that considered the first two positional
-  # arguments shorthands for --input and --output.
-  while len(options.args) and (options.input is None or \
-                               options.output is None):
-    if options.input is None:
-      options.input = options.args.pop(0)
-    elif options.output is None:
-      options.output = options.args.pop(0)
-  if options.args:
-    parser.error('Unexpected arguments: %r' % options.args)
-
-  values = fetch_values(options.file)
-  for key, val in evals.iteritems():
-    values[key] = str(eval(val, globals(), values))
-
-  if options.template is not None:
-    contents = subst_template(options.template, values)
-  elif options.input:
-    contents = subst_file(options.input, values)
-  else:
-    # Generate a default set of version information.
-    contents = """MAJOR=%(MAJOR)s
-MINOR=%(MINOR)s
-BUILD=%(BUILD)s
-PATCH=%(PATCH)s
-LASTCHANGE=%(LASTCHANGE)s
-OFFICIAL_BUILD=%(OFFICIAL_BUILD)s
-""" % values
-
-  if options.output is not None:
-    write_if_changed(options.output, contents)
-  else:
-    print contents
-
-  return 0
-
-
-if __name__ == '__main__':
-  sys.exit(main())