build/android/gyp/util/build_utils.py

   1 # Copyright 2013 The Chromium Authors. All rights reserved.
   2 # Use of this source code is governed by a BSD-style license that can be
   3 # found in the LICENSE file.
   4
   5 import fnmatch
   6 import json
   7 import os
   8 import pipes
   9 import shlex
  10 import shutil
  11 import subprocess
  12 import sys
  13 import traceback
  14
  15
  16 def MakeDirectory(dir_path):
  17   try:
  18     os.makedirs(dir_path)
  19   except OSError:
  20     pass
  21
  22
  23 def DeleteDirectory(dir_path):
  24   if os.path.exists(dir_path):
  25     shutil.rmtree(dir_path)
  26
  27
  28 def Touch(path):
  29   MakeDirectory(os.path.dirname(path))
  30   with open(path, 'a'):
  31     os.utime(path, None)
  32
  33
  34 def FindInDirectory(directory, filter):
  35   files = []
  36   for root, dirnames, filenames in os.walk(directory):
  37     matched_files = fnmatch.filter(filenames, filter)
  38     files.extend((os.path.join(root, f) for f in matched_files))
  39   return files
  40
  41
  42 def FindInDirectories(directories, filter):
  43   all_files = []
  44   for directory in directories:
  45     all_files.extend(FindInDirectory(directory, filter))
  46   return all_files
  47
  48
  49 def ParseGypList(gyp_string):
  50   # The ninja generator doesn't support $ in strings, so use ## to
  51   # represent $.
  52   # TODO(cjhopman): Remove when
  53   # https://code.google.com/p/gyp/issues/detail?id=327
  54   # is addressed.
  55   gyp_string = gyp_string.replace('##', '$')
  56   return shlex.split(gyp_string)
  57
  58
  59 def CheckOptions(options, parser, required=[]):
  60   for option_name in required:
  61     if not getattr(options, option_name):
  62       parser.error('--%s is required' % option_name.replace('_', '-'))
  63
  64
  65 def ReadJson(path):
  66   with open(path, 'r') as jsonfile:
  67     return json.load(jsonfile)
  68
  69
  70 # This can be used in most cases like subprocess.check_call. The output,
  71 # particularly when the command fails, better highlights the command's failure.
  72 # This call will directly exit on a failure in the subprocess so that no python
  73 # stacktrace is printed after the output of the failed command.
  74 def CheckCallDie(args, suppress_output=False, cwd=None):
  75   if not cwd:
  76     cwd = os.getcwd()
  77
  78   child = subprocess.Popen(args,
  79       stdout=subprocess.PIPE, stderr=subprocess.STDOUT, cwd=cwd)
  80
  81   stdout, _ = child.communicate()
  82
  83   if child.returncode:
  84     stacktrace = traceback.extract_stack()
  85     print >> sys.stderr, ''.join(traceback.format_list(stacktrace))
  86     # A user should be able to simply copy and paste the command that failed
  87     # into their shell.
  88     copyable_command = ' '.join(map(pipes.quote, args))
  89     copyable_command = ('( cd ' + os.path.abspath(cwd) + '; '
  90         + copyable_command + ' )')
  91     print >> sys.stderr, 'Command failed:', copyable_command, '\n'
  92
  93     if stdout:
  94       print stdout,
  95
  96     # Directly exit to avoid printing stacktrace.
  97     sys.exit(child.returncode)
  98
  99   else:
 100     if stdout and not suppress_output:
 101       print stdout,
 102     return stdout
 103
 104
 105 def GetModifiedTime(path):
 106   # For a symlink, the modified time should be the greater of the link's
 107   # modified time and the modified time of the target.
 108   return max(os.lstat(path).st_mtime, os.stat(path).st_mtime)
 109
 110
 111 def IsTimeStale(output, inputs):
 112   if not os.path.exists(output):
 113     return True
 114
 115   output_time = GetModifiedTime(output)
 116   for input in inputs:
 117     if GetModifiedTime(input) > output_time:
 118       return True
 119   return False