post_process_props.py revision 8ad4bb16a0d8b8ff9b4d17e860db336111bef34d 
1#!/usr/bin/env python
2#
3# Copyright (C) 2009 The Android Open Source Project
4#
5# Licensed under the Apache License, Version 2.0 (the "License");
6# you may not use this file except in compliance with the License.
7# You may obtain a copy of the License at
8#
9#      http://www.apache.org/licenses/LICENSE-2.0
10#
11# Unless required by applicable law or agreed to in writing, software
12# distributed under the License is distributed on an "AS IS" BASIS,
13# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14# See the License for the specific language governing permissions and
15# limitations under the License.
16
17import sys
18
19# Put the modifications that you need to make into the /system/build.prop into this
20# function. The prop object has get(name) and put(name,value) methods.
21def mangle_build_prop(prop):
22  pass
23
24# Put the modifications that you need to make into the /system/build.prop into this
25# function. The prop object has get(name) and put(name,value) methods.
26def mangle_default_prop(prop):
27  # If ro.debuggable is 1, then enable adb on USB by default
28  # (this is for userdebug builds)
29  if prop.get("ro.debuggable") == "1":
30    val = prop.get("persist.sys.usb.config")
31    if val == "":
32      val = "adb"
33    else:
34      val = val + ",adb"
35    prop.put("persist.sys.usb.config", val)
36  # UsbDeviceManager expects a value here.  If it doesn't get it, it will
37  # default to "adb". That might not the right policy there, but it's better
38  # to be explicit.
39  if not prop.get("persist.sys.usb.config"):
40    prop.put("persist.sys.usb.config", "none");
41
42class PropFile:
43  def __init__(self, lines):
44    self.lines = [s[:-1] for s in lines]
45
46  def get(self, name):
47    key = name + "="
48    for line in self.lines:
49      if line.startswith(key):
50        return line[len(key):]
51    return ""
52
53  def put(self, name, value):
54    key = name + "="
55    for i in range(0,len(self.lines)):
56      if self.lines[i].startswith(key):
57        self.lines[i] = key + value
58        return
59    self.lines.append(key + value)
60
61  def write(self, f):
62    f.write("\n".join(self.lines))
63    f.write("\n")
64
65def main(argv):
66  filename = argv[1]
67  f = open(filename)
68  lines = f.readlines()
69  f.close()
70
71  properties = PropFile(lines)
72  if filename.endswith("/build.prop"):
73    mangle_build_prop(properties)
74  elif filename.endswith("/default.prop"):
75    mangle_default_prop(properties)
76  else:
77    sys.stderr.write("bad command line: " + str(argv) + "\n")
78    sys.exit(1)
79
80  f = open(filename, 'w+')
81  properties.write(f)
82  f.close()
83
84if __name__ == "__main__":
85  main(sys.argv)
86