version_defaults.mk revision 13ba6e00f4c7e04f1038e94ab98e3ed424daa4fa 
1#
2# Copyright (C) 2008 The Android Open Source Project
3#
4# Licensed under the Apache License, Version 2.0 (the "License");
5# you may not use this file except in compliance with the License.
6# You may obtain a copy of the License at
7#
8#      http://www.apache.org/licenses/LICENSE-2.0
9#
10# Unless required by applicable law or agreed to in writing, software
11# distributed under the License is distributed on an "AS IS" BASIS,
12# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13# See the License for the specific language governing permissions and
14# limitations under the License.
15#
16
17#
18# Handle various build version information.
19#
20# Guarantees that the following are defined:
21#     PLATFORM_VERSION
22#     PLATFORM_SDK_VERSION
23#     PLATFORM_VERSION_CODENAME
24#     DEFAULT_APP_TARGET_SDK
25#     BUILD_ID
26#     BUILD_NUMBER
27#     BUILD_DATETIME
28#
29
30# Look for an optional file containing overrides of the defaults,
31# but don't cry if we don't find it.  We could just use -include, but
32# the build.prop target also wants INTERNAL_BUILD_ID_MAKEFILE to be set
33# if the file exists.
34#
35INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk)
36ifneq "" "$(INTERNAL_BUILD_ID_MAKEFILE)"
37  include $(INTERNAL_BUILD_ID_MAKEFILE)
38endif
39
40ifeq "" "$(PLATFORM_VERSION)"
41  # This is the canonical definition of the platform version,
42  # which is the version that we reveal to the end user.
43  # Update this value when the platform version changes (rather
44  # than overriding it somewhere else).  Can be an arbitrary string.
45  PLATFORM_VERSION := 5.1.51
46endif
47
48ifeq "" "$(PLATFORM_SDK_VERSION)"
49  # This is the canonical definition of the SDK version, which defines
50  # the set of APIs and functionality available in the platform.  It
51  # is a single integer that increases monotonically as updates to
52  # the SDK are released.  It should only be incremented when the APIs for
53  # the new release are frozen (so that developers don't write apps against
54  # intermediate builds).  During development, this number remains at the
55  # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
56  # the code-name of the new development work.
57  PLATFORM_SDK_VERSION := 22
58endif
59
60ifeq "" "$(PLATFORM_VERSION_CODENAME)"
61  # This is the current development code-name, if the build is not a final
62  # release build.  If this is a final release build, it is simply "REL".
63  PLATFORM_VERSION_CODENAME := REL
64
65  # This is all of the development codenames that are active.  Should be either
66  # the same as PLATFORM_VERSION_CODENAME or a comma-separated list of additional
67  # codenames after PLATFORM_VERSION_CODENAME.
68  PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME)
69endif
70
71ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
72  # This is the default minSdkVersion and targetSdkVersion to use for
73  # all .apks created by the build system.  It can be overridden by explicitly
74  # setting these in the .apk's AndroidManifest.xml.  It is either the code
75  # name of the development build or, if this is a release build, the official
76  # SDK version of this release.
77  ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
78    DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
79  else
80    DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
81  endif
82endif
83
84ifeq "" "$(BUILD_ID)"
85  # Used to signify special builds.  E.g., branches and/or releases,
86  # like "M5-RC7".  Can be an arbitrary string, but must be a single
87  # word and a valid file name.
88  #
89  # If there is no BUILD_ID set, make it obvious.
90  BUILD_ID := UNKNOWN
91endif
92
93ifeq "" "$(BUILD_DATETIME)"
94  # Used to reproduce builds by setting the same time. Must be in a
95  # format understood by `date`
96  BUILD_DATETIME := $(shell date)
97endif
98
99ifeq "" "$(BUILD_NUMBER)"
100  # BUILD_NUMBER should be set to the source control value that
101  # represents the current state of the source code.  E.g., a
102  # perforce changelist number or a git hash.  Can be an arbitrary string
103  # (to allow for source control that uses something other than numbers),
104  # but must be a single word and a valid file name.
105  #
106  # If no BUILD_NUMBER is set, create a useful "I am an engineering build
107  # from this date/time" value.  Make it start with a non-digit so that
108  # anyone trying to parse it as an integer will probably get "0".
109  BUILD_NUMBER := eng.$(USER).$(shell date -d "$(BUILD_DATETIME)" +%Y%m%d.%H%M%S)
110endif
111