| #!/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 re |
| from sets import Set |
| |
| |
| class AndroidMK(object): |
| """In memory representation of Android.mk file.""" |
| |
| _RE_INCLUDE = re.compile(r'include\s+\$\((.+)\)') |
| _VAR_DELIMITER = ":=" |
| FILENAME = "Android.mk" |
| CERTIFICATE = "LOCAL_CERTIFICATE" |
| PACKAGE_NAME = "LOCAL_PACKAGE_NAME" |
| |
| def __init__(self, app_path=None): |
| self._includes = Set() # variables included in makefile |
| self._variables = {} # variables defined in makefile |
| |
| if app_path: |
| self.ParseMK(app_path) |
| |
| 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() |
| |
| 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 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 ParseMK(self, app_path): |
| """Parse Android.mk at the specified path. |
| |
| Args: |
| app_path: path to folder containing Android.mk |
| Raises: |
| IOError: Android.mk cannot be found at given path, or cannot be opened |
| for reading |
| """ |
| self.app_path = app_path.rstrip("/") |
| self.mk_path = "%s/%s" % (self.app_path, self.FILENAME) |
| mk = open(self.mk_path) |
| for line in mk: |
| self._ProcessMKLine(line) |
| mk.close() |