Jack Wang | 2abd80a | 2009-06-29 18:47:03 -0700 | [diff] [blame] | 1 | #!/usr/bin/python2.4 |
| 2 | # |
| 3 | # |
| 4 | # Copyright 2009, The Android Open Source Project |
| 5 | # |
| 6 | # Licensed under the Apache License, Version 2.0 (the "License"); |
| 7 | # you may not use this file except in compliance with the License. |
| 8 | # You may obtain a copy of the License at |
| 9 | # |
| 10 | # http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | # |
| 12 | # Unless required by applicable law or agreed to in writing, software |
| 13 | # distributed under the License is distributed on an "AS IS" BASIS, |
| 14 | # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 15 | # See the License for the specific language governing permissions and |
| 16 | # limitations under the License. |
| 17 | |
| 18 | """In memory representation of Android.mk file. |
| 19 | |
| 20 | Specifications for Android.mk can be found at |
| 21 | development/ndk/docs/ANDROID-MK.txt |
| 22 | """ |
| 23 | |
| 24 | import re |
| 25 | from sets import Set |
| 26 | |
| 27 | |
| 28 | class AndroidMK(object): |
| 29 | """In memory representation of Android.mk file.""" |
| 30 | |
| 31 | _RE_INCLUDE = re.compile(r'include\s+\$\((.+)\)') |
| 32 | _VAR_DELIMITER = ":=" |
| 33 | FILENAME = "Android.mk" |
| 34 | CERTIFICATE = "LOCAL_CERTIFICATE" |
| 35 | PACKAGE_NAME = "LOCAL_PACKAGE_NAME" |
| 36 | |
| 37 | def __init__(self, app_path=None): |
| 38 | self._includes = Set() # variables included in makefile |
| 39 | self._variables = {} # variables defined in makefile |
| 40 | |
| 41 | if app_path: |
| 42 | self.ParseMK(app_path) |
| 43 | |
| 44 | def _ProcessMKLine(self, line): |
| 45 | """Add a variable definition or include. |
| 46 | |
| 47 | Ignores unrecognized lines. |
| 48 | |
| 49 | Args: |
| 50 | line: line of text from makefile |
| 51 | """ |
| 52 | m = self._RE_INCLUDE.match(line) |
| 53 | if m: |
| 54 | self._includes.add(m.group(1)) |
| 55 | else: |
| 56 | parts = line.split(self._VAR_DELIMITER) |
| 57 | if len(parts) > 1: |
| 58 | self._variables[parts[0].strip()] = parts[1].strip() |
| 59 | |
| 60 | def GetVariable(self, identifier): |
| 61 | """Retrieve makefile variable. |
| 62 | |
| 63 | Args: |
| 64 | identifier: name of variable to retrieve |
| 65 | Returns: |
| 66 | value of specified identifier, None if identifier not found in makefile |
| 67 | """ |
| 68 | # use dict.get(x) rather than dict[x] to avoid KeyError exception, |
| 69 | # so None is returned if identifier not found |
| 70 | return self._variables.get(identifier, None) |
| 71 | |
| 72 | def HasInclude(self, identifier): |
| 73 | """Check variable is included in makefile. |
| 74 | |
| 75 | Args: |
| 76 | identifer: name of variable to check |
| 77 | Returns: |
| 78 | True if identifer is included in makefile, otherwise False |
| 79 | """ |
| 80 | return identifier in self._includes |
| 81 | |
| 82 | def ParseMK(self, app_path): |
| 83 | """Parse Android.mk at the specified path. |
| 84 | |
| 85 | Args: |
| 86 | app_path: path to folder containing Android.mk |
| 87 | Raises: |
| 88 | IOError: Android.mk cannot be found at given path, or cannot be opened |
| 89 | for reading |
| 90 | """ |
| 91 | self.app_path = app_path.rstrip("/") |
| 92 | self.mk_path = "%s/%s" % (self.app_path, self.FILENAME) |
| 93 | mk = open(self.mk_path) |
| 94 | for line in mk: |
| 95 | self._ProcessMKLine(line) |
| 96 | mk.close() |