version_defaults.mk revision db042bdccd0887af6137dba273cda7dd605718fb 
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#
28
29# Look for an optional file containing overrides of the defaults,
30# but don't cry if we don't find it.  We could just use -include, but
31# the build.prop target also wants INTERNAL_BUILD_ID_MAKEFILE to be set
32# if the file exists.
33#
34INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk)
35ifneq "" "$(INTERNAL_BUILD_ID_MAKEFILE)"
36  include $(INTERNAL_BUILD_ID_MAKEFILE)
37endif
38
39ifeq "" "$(PLATFORM_VERSION)"
40  # This is the canonical definition of the platform version,
41  # which is the version that we reveal to the end user.
42  # Update this value when the platform version changes (rather
43  # than overriding it somewhere else).  Can be an arbitrary string.
44  PLATFORM_VERSION := M
45endif
46
47ifeq "" "$(PLATFORM_SDK_VERSION)"
48  # This is the canonical definition of the SDK version, which defines
49  # the set of APIs and functionality available in the platform.  It
50  # is a single integer that increases monotonically as updates to
51  # the SDK are released.  It should only be incremented when the APIs for
52  # the new release are frozen (so that developers don't write apps against
53  # intermediate builds).  During development, this number remains at the
54  # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
55  # the code-name of the new development work.
56  PLATFORM_SDK_VERSION := 23
57endif
58
59ifeq "" "$(PLATFORM_VERSION_CODENAME)"
60  # This is the current development code-name, if the build is not a final
61  # release build.  If this is a final release build, it is simply "REL".
62  PLATFORM_VERSION_CODENAME := MNC
63
64  # This is all of the development codenames that are active.  Should be either
65  # the same as PLATFORM_VERSION_CODENAME or a comma-separated list of additional
66  # codenames after PLATFORM_VERSION_CODENAME.
67  PLATFORM_VERSION_ALL_CODENAMES := $(PLATFORM_VERSION_CODENAME)
68endif
69
70ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
71  PLATFORM_PREVIEW_SDK_VERSION := 0
72else
73  ifeq "" "$(PLATFORM_PREVIEW_SDK_VERSION)"
74    # This is the definition of a preview SDK version over and above the current
75    # platform SDK version. Unlike the platform SDK version, a higher value
76    # for preview SDK version does NOT mean that all prior preview APIs are
77    # included. Packages reading this value to determine compatibility with
78    # known APIs should check that this value is precisely equal to the preview
79    # SDK version the package was built for, otherwise it should fall back to
80    # assuming the device can only support APIs as of the previous official
81    # public release.
82    # This value will always be 0 for release builds.
83    PLATFORM_PREVIEW_SDK_VERSION := 3
84  endif
85endif
86
87ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
88  # This is the default minSdkVersion and targetSdkVersion to use for
89  # all .apks created by the build system.  It can be overridden by explicitly
90  # setting these in the .apk's AndroidManifest.xml.  It is either the code
91  # name of the development build or, if this is a release build, the official
92  # SDK version of this release.
93  ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
94    DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
95  else
96    DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
97  endif
98endif
99
100ifeq "" "$(BUILD_ID)"
101  # Used to signify special builds.  E.g., branches and/or releases,
102  # like "M5-RC7".  Can be an arbitrary string, but must be a single
103  # word and a valid file name.
104  #
105  # If there is no BUILD_ID set, make it obvious.
106  BUILD_ID := UNKNOWN
107endif
108
109ifeq "" "$(BUILD_NUMBER)"
110  # BUILD_NUMBER should be set to the source control value that
111  # represents the current state of the source code.  E.g., a
112  # perforce changelist number or a git hash.  Can be an arbitrary string
113  # (to allow for source control that uses something other than numbers),
114  # but must be a single word and a valid file name.
115  #
116  # If no BUILD_NUMBER is set, create a useful "I am an engineering build
117  # from this date/time" value.  Make it start with a non-digit so that
118  # anyone trying to parse it as an integer will probably get "0".
119  BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)
120endif
121