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#!/usr/bin/python2.4
#
#
# Copyright 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.
"""In memory representation of Android.mk file.
Specifications for Android.mk can be found at
development/ndk/docs/ANDROID-MK.txt
"""
import os
import re
from sets import Set
import logger
class AndroidMK(object):
"""In memory representation of Android.mk file."""
_RE_INCLUDE = re.compile(r'include\s+\$\((.+)\)')
_RE_VARIABLE_REF = re.compile(r'\$\((.+)\)')
_VAR_DELIMITER = ":="
FILENAME = "Android.mk"
CERTIFICATE = "LOCAL_CERTIFICATE"
PACKAGE_NAME = "LOCAL_PACKAGE_NAME"
def __init__(self):
self._includes = Set() # variables included in makefile
self._variables = {} # variables defined in makefile
self._has_gtestlib = False
def _ProcessMKLine(self, line):
"""Add a variable definition or include.
Ignores unrecognized lines.
Args:
line: line of text from makefile
"""
m = self._RE_INCLUDE.match(line)
if m:
self._includes.add(m.group(1))
else:
parts = line.split(self._VAR_DELIMITER)
if len(parts) > 1:
self._variables[parts[0].strip()] = parts[1].strip()
# hack, look for explicit mention of libgtest_main
if line.find('libgtest_main') != -1:
self._has_gtestlib = True
def GetVariable(self, identifier):
"""Retrieve makefile variable.
Args:
identifier: name of variable to retrieve
Returns:
value of specified identifier, None if identifier not found in makefile
"""
# use dict.get(x) rather than dict[x] to avoid KeyError exception,
# so None is returned if identifier not found
return self._variables.get(identifier, None)
def GetExpandedVariable(self, identifier):
"""Retrieve makefile variable.
If variable value refers to another variable, recursively expand it to
find its literal value
Args:
identifier: name of variable to retrieve
Returns:
value of specified identifier, None if identifier not found in makefile
"""
# use dict.get(x) rather than dict[x] to avoid KeyError exception,
# so None is returned if identifier not found
return self.__RecursiveGetVariable(identifier, Set())
def __RecursiveGetVariable(self, identifier, visited_variables):
variable_value = self.GetVariable(identifier)
if not variable_value:
return None
if variable_value in visited_variables:
raise RuntimeError('recursive loop found for makefile variable %s'
% variable_value)
m = self._RE_VARIABLE_REF.match(variable_value)
if m:
logger.SilentLog('Found variable ref %s for identifier %s'
% (variable_value, identifier))
variable_ref = m.group(1)
visited_variables.add(variable_ref)
return self.__RecursiveGetVariable(variable_ref, visited_variables)
else:
return variable_value
def HasInclude(self, identifier):
"""Check variable is included in makefile.
Args:
identifer: name of variable to check
Returns:
True if identifer is included in makefile, otherwise False
"""
return identifier in self._includes
def IncludesMakefilesUnder(self):
"""Check if makefile has a 'include makefiles under here' rule"""
return self.HasInclude('call all-makefiles-under,$(LOCAL_PATH)')
def HasJavaLibrary(self, library_name):
"""Check if library is specified as a local java library in makefile.
Args:
library_name: name of library to check
Returns:
True if library_name is included in makefile, otherwise False
"""
java_lib_string = self.GetExpandedVariable('LOCAL_JAVA_LIBRARIES')
if java_lib_string:
java_libs = java_lib_string.split(' ')
return library_name in java_libs
return False
def HasGTest(self):
"""Check if makefile includes rule to build a native gtest.
Returns:
True if rule to build native test is in makefile, otherwise False
"""
return self._has_gtestlib or self.HasInclude('BUILD_NATIVE_TEST')
def _ParseMK(self, mk_path):
"""Parse Android.mk at the specified path.
Args:
mk_path: path to Android.mk
Raises:
IOError: Android.mk cannot be found at given path, or cannot be opened
for reading
"""
mk = open(mk_path)
for line in mk:
self._ProcessMKLine(line)
mk.close()
def CreateAndroidMK(path, filename=AndroidMK.FILENAME):
"""Factory method for creating a AndroidMK.
Args:
path: the directory of the make file
filename: the filename of the makefile
Return:
the AndroidMK or None if there was no file present
"""
mk_path = os.path.join(path, filename)
if os.path.isfile(mk_path):
mk = AndroidMK()
mk._ParseMK(mk_path)
return mk
else:
return None
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