post_process_props.py revision 115c66bd741c6caa7d3078615b81f5e7a5041c9b 
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  buildprops=prop.buildprops
23  check_pass=True
24  for key in buildprops:
25    # Check build properties' length.
26    # Terminator(\0) added into the provided value of properties
27    # Total length (including terminator) will be no greater that PROP_VALUE_MAX(92).
28    if len(buildprops[key]) > 91:
29      # If dev build, show a warning message, otherwise fail the build with error message
30      if prop.get("ro.build.version.incremental").startswith("eng"):
31        sys.stderr.write("warning: " + key + " exceeds 91 symbols: ")
32        sys.stderr.write(buildprops[key])
33        sys.stderr.write("(" + str(len(buildprops[key])) + ") \n")
34        sys.stderr.write("warning: This will cause the " + key + " ")
35        sys.stderr.write("property return as empty at runtime\n")
36      else:
37        check_pass=False
38        sys.stderr.write("error: " + key + " cannot exceed 91 symbols: ")
39        sys.stderr.write(buildprops[key])
40        sys.stderr.write("(" + str(len(buildprops[key])) + ") \n")
41  if not check_pass:
42    sys.exit(1)
43
44# Put the modifications that you need to make into the /system/build.prop into this
45# function. The prop object has get(name) and put(name,value) methods.
46def mangle_default_prop(prop):
47  # If ro.debuggable is 1, then enable adb on USB by default
48  # (this is for userdebug builds)
49  if prop.get("ro.debuggable") == "1":
50    val = prop.get("persist.sys.usb.config")
51    if val == "":
52      val = "adb"
53    else:
54      val = val + ",adb"
55    prop.put("persist.sys.usb.config", val)
56  # UsbDeviceManager expects a value here.  If it doesn't get it, it will
57  # default to "adb". That might not the right policy there, but it's better
58  # to be explicit.
59  if not prop.get("persist.sys.usb.config"):
60    prop.put("persist.sys.usb.config", "none");
61
62class PropFile:
63
64  buildprops={}
65
66  def __init__(self, lines):
67    self.lines = [s[:-1] for s in lines]
68    for line in self.lines:
69      line=line.strip()
70      if not line.strip() or line.startswith("#"):
71        continue
72      index=line.find("=")
73      key=line[0:index]
74      value=line[index+1:]
75      self.buildprops[key]=value
76
77  def get(self, name):
78    key = name + "="
79    for line in self.lines:
80      if line.startswith(key):
81        return line[len(key):]
82    return ""
83
84  def put(self, name, value):
85    key = name + "="
86    for i in range(0,len(self.lines)):
87      if self.lines[i].startswith(key):
88        self.lines[i] = key + value
89        return
90    self.lines.append(key + value)
91
92  def write(self, f):
93    f.write("\n".join(self.lines))
94    f.write("\n")
95
96def main(argv):
97  filename = argv[1]
98  f = open(filename)
99  lines = f.readlines()
100  f.close()
101
102  properties = PropFile(lines)
103  if filename.endswith("/build.prop"):
104    mangle_build_prop(properties)
105  elif filename.endswith("/default.prop"):
106    mangle_default_prop(properties)
107  else:
108    sys.stderr.write("bad command line: " + str(argv) + "\n")
109    sys.exit(1)
110
111  f = open(filename, 'w+')
112  properties.write(f)
113  f.close()
114
115if __name__ == "__main__":
116  main(sys.argv)
117