tools/post_process_props.py - LeafOS-Project/android_build - Gitiles

 #!/usr/bin/env python3
 #
 # Copyright (C) 2009 The Android Open Source Project
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
 # You may obtain a copy of the License at
 #
 #      http://www.apache.org/licenses/LICENSE-2.0
 #
 # Unless required by applicable law or agreed to in writing, software
 # distributed under the License is distributed on an "AS IS" BASIS,
 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 # See the License for the specific language governing permissions and
 # limitations under the License.

 import argparse
 import sys

 from uffd_gc_utils import should_enable_uffd_gc

 # Usage: post_process_props.py file.prop [disallowed_key, ...]
 # Disallowed keys are removed from the property file, if present

 # See PROP_VALUE_MAX in system_properties.h.
 # The constant in system_properties.h includes the terminating NUL,
 # so we decrease the value by 1 here.
 PROP_VALUE_MAX = 91

 # Put the modifications that you need to make into the */build.prop into this
 # function.
 def mangle_build_prop(prop_list, kernel_version_file_for_uffd_gc):
   # If ro.debuggable is 1, then enable adb on USB by default
   # (this is for userdebug builds)
   if prop_list.get_value("ro.debuggable") == "1":
     val = prop_list.get_value("persist.sys.usb.config")
     if "adb" not in val:
       if val == "":
         val = "adb"
       else:
         val = val + ",adb"
       prop_list.put("persist.sys.usb.config", val)
   if prop_list.get_value("ro.dalvik.vm.enable_uffd_gc") == "default":
     assert kernel_version_file_for_uffd_gc != ""
     enable_uffd_gc = should_enable_uffd_gc(kernel_version_file_for_uffd_gc)
     prop_list.put("ro.dalvik.vm.enable_uffd_gc",
                   "true" if enable_uffd_gc else "false")

 def validate_grf_props(prop_list):
   """Validate GRF properties if exist.

   If ro.board.first_api_level is defined, check if its value is valid.

   Returns:
     True if the GRF properties are valid.
   """
   grf_api_level = prop_list.get_value("ro.board.first_api_level")
   board_api_level = prop_list.get_value("ro.board.api_level")

   if grf_api_level and board_api_level:
     grf_api_level = int(grf_api_level)
     board_api_level = int(board_api_level)
     if board_api_level < grf_api_level:
       sys.stderr.write("error: ro.board.api_level(%d) must not be less than "
                        "ro.board.first_api_level(%d)\n"
                        % (board_api_level, grf_api_level))
       return False

   return True

 def validate(prop_list):
   """Validate the properties.

   If the value of a sysprop exceeds the max limit (91), it's an error, unless
   the sysprop is a read-only one.

   Checks if there is no optional prop assignments.

   Returns:
     True if nothing is wrong.
   """
   check_pass = True
   for p in prop_list.get_all_props():
     if len(p.value) > PROP_VALUE_MAX and not p.name.startswith("ro."):
       check_pass = False
       sys.stderr.write("error: %s cannot exceed %d bytes: " %
                        (p.name, PROP_VALUE_MAX))
       sys.stderr.write("%s (%d)\n" % (p.value, len(p.value)))

     if p.is_optional():
       check_pass = False
       sys.stderr.write("error: found unresolved optional prop assignment:\n")
       sys.stderr.write(str(p) + "\n")

   return check_pass

 def override_optional_props(prop_list, allow_dup=False):
   """Override a?=b with a=c, if the latter exists

   Overriding is done by deleting a?=b
   When there are a?=b and a?=c, then only the last one survives
   When there are a=b and a=c, then it's an error.

   Returns:
     True if the override was successful
   """
   success = True
   for name in prop_list.get_all_names():
     props = prop_list.get_props(name)
     optional_props = [p for p in props if p.is_optional()]
     overriding_props = [p for p in props if not p.is_optional()]
     if len(overriding_props) > 1:
       # duplicated props are allowed when the all have the same value
       if all(overriding_props[0].value == p.value for p in overriding_props):
         for p in optional_props:
           p.delete("overridden by %s" % str(overriding_props[0]))
         continue
       # or if dup is explicitly allowed for compat reason
       if allow_dup:
         # this could left one or more optional props unresolved.
         # Convert them into non-optional because init doesn't understand ?=
         # syntax
         for p in optional_props:
           p.optional = False
         continue

       success = False
       sys.stderr.write("error: found duplicate sysprop assignments:\n")
       for p in overriding_props:
         sys.stderr.write("%s\n" % str(p))
     elif len(overriding_props) == 1:
       for p in optional_props:
         p.delete("overridden by %s" % str(overriding_props[0]))
     else:
       if len(optional_props) > 1:
         for p in optional_props[:-1]:
           p.delete("overridden by %s" % str(optional_props[-1]))
       # Make the last optional one as non-optional
       optional_props[-1].optional = False

   return success

 class Prop:

   def __init__(self, name, value, optional=False, comment=None):
     self.name = name.strip()
     self.value = value.strip()
     if comment != None:
       self.comments = [comment]
     else:
       self.comments = []
     self.optional = optional

   @staticmethod
   def from_line(line):
     line = line.rstrip('\n')
     if line.startswith("#"):
       return Prop("", "", comment=line)
     elif "?=" in line:
       name, value = line.split("?=", 1)
       return Prop(name, value, optional=True)
     elif "=" in line:
       name, value = line.split("=", 1)
       return Prop(name, value, optional=False)
     else:
       # don't fail on invalid line
       # TODO(jiyong) make this a hard error
       return Prop("", "", comment=line)

   def is_comment(self):
     return bool(self.comments and not self.name)

   def is_optional(self):
     return (not self.is_comment()) and self.optional

   def make_as_comment(self):
     # Prepend "#" to the last line which is the prop assignment
     if not self.is_comment():
       assignment = str(self).rsplit("\n", 1)[-1]
       self.comments.append("#" + assignment)
       self.name = ""
       self.value = ""

   def delete(self, reason):
     self.comments.append("# Removed by post_process_props.py because " + reason)
     self.make_as_comment()

   def __str__(self):
     assignment = []
     if not self.is_comment():
       operator = "?=" if self.is_optional() else "="
       assignment.append(self.name + operator + self.value)
     return "\n".join(self.comments + assignment)

 class PropList:

   def __init__(self, filename):
     with open(filename) as f:
       self.props = [Prop.from_line(l)
                     for l in f.readlines() if l.strip() != ""]

   def get_all_props(self):
     return [p for p in self.props if not p.is_comment()]

   def get_all_names(self):
     return set([p.name for p in self.get_all_props()])

   def get_props(self, name):
     return [p for p in self.get_all_props() if p.name == name]

   def get_value(self, name):
     # Caution: only the value of the first sysprop having the name is returned.
     return next((p.value for p in self.props if p.name == name), "")

   def put(self, name, value):
     # Note: when there is an optional prop for the name, its value isn't changed.
     # Instead a new non-optional prop is appended, which will override the
     # optional prop. Otherwise, the new value might be overridden by an existing
     # non-optional prop of the same name.
     index = next((i for i,p in enumerate(self.props)
                   if p.name == name and not p.is_optional()), -1)
     if index == -1:
       self.props.append(Prop(name, value,
                              comment="# Auto-added by post_process_props.py"))
     else:
       self.props[index].comments.append(
           "# Value overridden by post_process_props.py. Original value: %s" %
           self.props[index].value)
       self.props[index].value = value

   def write(self, filename):
     with open(filename, 'w+') as f:
       for p in self.props:
         f.write(str(p) + "\n")

 def main(argv):
   parser = argparse.ArgumentParser(description="Post-process build.prop file")
   parser.add_argument("--allow-dup", dest="allow_dup", action="store_true",
                       default=False)
   parser.add_argument("filename")
   parser.add_argument("disallowed_keys", metavar="KEY", type=str, nargs="*")
   parser.add_argument("--sdk-version", type=int, required=True)
   parser.add_argument("--kernel-version-file-for-uffd-gc", required=True)
   args = parser.parse_args()

   if not args.filename.endswith("/build.prop"):
     sys.stderr.write("bad command line: " + str(argv) + "\n")
     sys.exit(1)

   props = PropList(args.filename)
   mangle_build_prop(props, args.kernel_version_file_for_uffd_gc)
   if not override_optional_props(props, args.allow_dup):
     sys.exit(1)
   if not validate_grf_props(props):
     sys.exit(1)
   if not validate(props):
     sys.exit(1)

   # Drop any disallowed keys
   for key in args.disallowed_keys:
     for p in props.get_props(key):
       p.delete("%s is a disallowed key" % key)

   props.write(args.filename)

 if __name__ == "__main__":
   main(sys.argv)
	#!/usr/bin/env python3
	#
	# Copyright (C) 2009 The Android Open Source Project
	#
	# Licensed under the Apache License, Version 2.0 (the "License");
	# you may not use this file except in compliance with the License.
	# You may obtain a copy of the License at
	#
	# http://www.apache.org/licenses/LICENSE-2.0
	#
	# Unless required by applicable law or agreed to in writing, software
	# distributed under the License is distributed on an "AS IS" BASIS,
	# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	# See the License for the specific language governing permissions and
	# limitations under the License.

	import argparse
	import sys

	from uffd_gc_utils import should_enable_uffd_gc

	# Usage: post_process_props.py file.prop [disallowed_key, ...]
	# Disallowed keys are removed from the property file, if present

	# See PROP_VALUE_MAX in system_properties.h.
	# The constant in system_properties.h includes the terminating NUL,
	# so we decrease the value by 1 here.
	PROP_VALUE_MAX = 91

	# Put the modifications that you need to make into the */build.prop into this
	# function.
	def mangle_build_prop(prop_list, kernel_version_file_for_uffd_gc):
	# If ro.debuggable is 1, then enable adb on USB by default
	# (this is for userdebug builds)
	if prop_list.get_value("ro.debuggable") == "1":
	val = prop_list.get_value("persist.sys.usb.config")
	if "adb" not in val:
	if val == "":
	val = "adb"
	else:
	val = val + ",adb"
	prop_list.put("persist.sys.usb.config", val)
	if prop_list.get_value("ro.dalvik.vm.enable_uffd_gc") == "default":
	assert kernel_version_file_for_uffd_gc != ""
	enable_uffd_gc = should_enable_uffd_gc(kernel_version_file_for_uffd_gc)
	prop_list.put("ro.dalvik.vm.enable_uffd_gc",
	"true" if enable_uffd_gc else "false")

	def validate_grf_props(prop_list):
	"""Validate GRF properties if exist.

	If ro.board.first_api_level is defined, check if its value is valid.

	Returns:
	True if the GRF properties are valid.
	"""
	grf_api_level = prop_list.get_value("ro.board.first_api_level")
	board_api_level = prop_list.get_value("ro.board.api_level")

	if grf_api_level and board_api_level:
	grf_api_level = int(grf_api_level)
	board_api_level = int(board_api_level)
	if board_api_level < grf_api_level:
	sys.stderr.write("error: ro.board.api_level(%d) must not be less than "
	"ro.board.first_api_level(%d)\n"
	% (board_api_level, grf_api_level))
	return False

	return True

	def validate(prop_list):
	"""Validate the properties.

	If the value of a sysprop exceeds the max limit (91), it's an error, unless
	the sysprop is a read-only one.

	Checks if there is no optional prop assignments.

	Returns:
	True if nothing is wrong.
	"""
	check_pass = True
	for p in prop_list.get_all_props():
	if len(p.value) > PROP_VALUE_MAX and not p.name.startswith("ro."):
	check_pass = False
	sys.stderr.write("error: %s cannot exceed %d bytes: " %
	(p.name, PROP_VALUE_MAX))
	sys.stderr.write("%s (%d)\n" % (p.value, len(p.value)))

	if p.is_optional():
	check_pass = False
	sys.stderr.write("error: found unresolved optional prop assignment:\n")
	sys.stderr.write(str(p) + "\n")

	return check_pass

	def override_optional_props(prop_list, allow_dup=False):
	"""Override a?=b with a=c, if the latter exists

	Overriding is done by deleting a?=b
	When there are a?=b and a?=c, then only the last one survives
	When there are a=b and a=c, then it's an error.

	Returns:
	True if the override was successful
	"""
	success = True
	for name in prop_list.get_all_names():
	props = prop_list.get_props(name)
	optional_props = [p for p in props if p.is_optional()]
	overriding_props = [p for p in props if not p.is_optional()]
	if len(overriding_props) > 1:
	# duplicated props are allowed when the all have the same value
	if all(overriding_props[0].value == p.value for p in overriding_props):
	for p in optional_props:
	p.delete("overridden by %s" % str(overriding_props[0]))
	continue
	# or if dup is explicitly allowed for compat reason
	if allow_dup:
	# this could left one or more optional props unresolved.
	# Convert them into non-optional because init doesn't understand ?=
	# syntax
	for p in optional_props:
	p.optional = False
	continue

	success = False
	sys.stderr.write("error: found duplicate sysprop assignments:\n")
	for p in overriding_props:
	sys.stderr.write("%s\n" % str(p))
	elif len(overriding_props) == 1:
	for p in optional_props:
	p.delete("overridden by %s" % str(overriding_props[0]))
	else:
	if len(optional_props) > 1:
	for p in optional_props[:-1]:
	p.delete("overridden by %s" % str(optional_props[-1]))
	# Make the last optional one as non-optional
	optional_props[-1].optional = False

	return success

	class Prop:

	def __init__(self, name, value, optional=False, comment=None):
	self.name = name.strip()
	self.value = value.strip()
	if comment != None:
	self.comments = [comment]
	else:
	self.comments = []
	self.optional = optional

	@staticmethod
	def from_line(line):
	line = line.rstrip('\n')
	if line.startswith("#"):
	return Prop("", "", comment=line)
	elif "?=" in line:
	name, value = line.split("?=", 1)
	return Prop(name, value, optional=True)
	elif "=" in line:
	name, value = line.split("=", 1)
	return Prop(name, value, optional=False)
	else:
	# don't fail on invalid line
	# TODO(jiyong) make this a hard error
	return Prop("", "", comment=line)

	def is_comment(self):
	return bool(self.comments and not self.name)

	def is_optional(self):
	return (not self.is_comment()) and self.optional

	def make_as_comment(self):
	# Prepend "#" to the last line which is the prop assignment
	if not self.is_comment():
	assignment = str(self).rsplit("\n", 1)[-1]
	self.comments.append("#" + assignment)
	self.name = ""
	self.value = ""

	def delete(self, reason):
	self.comments.append("# Removed by post_process_props.py because " + reason)
	self.make_as_comment()

	def __str__(self):
	assignment = []
	if not self.is_comment():
	operator = "?=" if self.is_optional() else "="
	assignment.append(self.name + operator + self.value)
	return "\n".join(self.comments + assignment)

	class PropList:

	def __init__(self, filename):
	with open(filename) as f:
	self.props = [Prop.from_line(l)
	for l in f.readlines() if l.strip() != ""]

	def get_all_props(self):
	return [p for p in self.props if not p.is_comment()]

	def get_all_names(self):
	return set([p.name for p in self.get_all_props()])

	def get_props(self, name):
	return [p for p in self.get_all_props() if p.name == name]

	def get_value(self, name):
	# Caution: only the value of the first sysprop having the name is returned.
	return next((p.value for p in self.props if p.name == name), "")

	def put(self, name, value):
	# Note: when there is an optional prop for the name, its value isn't changed.
	# Instead a new non-optional prop is appended, which will override the
	# optional prop. Otherwise, the new value might be overridden by an existing
	# non-optional prop of the same name.
	index = next((i for i,p in enumerate(self.props)
	if p.name == name and not p.is_optional()), -1)
	if index == -1:
	self.props.append(Prop(name, value,
	comment="# Auto-added by post_process_props.py"))
	else:
	self.props[index].comments.append(
	"# Value overridden by post_process_props.py. Original value: %s" %
	self.props[index].value)
	self.props[index].value = value

	def write(self, filename):
	with open(filename, 'w+') as f:
	for p in self.props:
	f.write(str(p) + "\n")

	def main(argv):
	parser = argparse.ArgumentParser(description="Post-process build.prop file")
	parser.add_argument("--allow-dup", dest="allow_dup", action="store_true",
	default=False)
	parser.add_argument("filename")
	parser.add_argument("disallowed_keys", metavar="KEY", type=str, nargs="*")
	parser.add_argument("--sdk-version", type=int, required=True)
	parser.add_argument("--kernel-version-file-for-uffd-gc", required=True)
	args = parser.parse_args()

	if not args.filename.endswith("/build.prop"):
	sys.stderr.write("bad command line: " + str(argv) + "\n")
	sys.exit(1)

	props = PropList(args.filename)
	mangle_build_prop(props, args.kernel_version_file_for_uffd_gc)
	if not override_optional_props(props, args.allow_dup):
	sys.exit(1)
	if not validate_grf_props(props):
	sys.exit(1)
	if not validate(props):
	sys.exit(1)

	# Drop any disallowed keys
	for key in args.disallowed_keys:
	for p in props.get_props(key):
	p.delete("%s is a disallowed key" % key)

	props.write(args.filename)

	if __name__ == "__main__":
	main(sys.argv)