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#     SECURITY_PATCH
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 := 6.0
46endif
47
48ifeq "" "$(PLATFORM_SDK_VERSION)"
49  # This is the canonical definition of the SDK version, which defines
50  # the set of APIs and functionality available in the platform.  It
51  # is a single integer that increases monotonically as updates to
52  # the SDK are released.  It should only be incremented when the APIs for
53  # the new release are frozen (so that developers don't write apps against
54  # intermediate builds).  During development, this number remains at the
55  # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds
56  # the code-name of the new development work.
57  PLATFORM_SDK_VERSION := 23
58endif
59
60ifeq "" "$(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 := $(PLATFORM_VERSION_CODENAME)
69endif
70
71ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
72  PLATFORM_PREVIEW_SDK_VERSION := 0
73else
74  ifeq "" "$(PLATFORM_PREVIEW_SDK_VERSION)"
75    # This is the definition of a preview SDK version over and above the current
76    # platform SDK version. Unlike the platform SDK version, a higher value
77    # for preview SDK version does NOT mean that all prior preview APIs are
78    # included. Packages reading this value to determine compatibility with
79    # known APIs should check that this value is precisely equal to the preview
80    # SDK version the package was built for, otherwise it should fall back to
81    # assuming the device can only support APIs as of the previous official
82    # public release.
83    # This value will always be 0 for release builds.
84    PLATFORM_PREVIEW_SDK_VERSION := 0
85  endif
86endif
87
88ifeq "" "$(DEFAULT_APP_TARGET_SDK)"
89  # This is the default minSdkVersion and targetSdkVersion to use for
90  # all .apks created by the build system.  It can be overridden by explicitly
91  # setting these in the .apk's AndroidManifest.xml.  It is either the code
92  # name of the development build or, if this is a release build, the official
93  # SDK version of this release.
94  ifeq "REL" "$(PLATFORM_VERSION_CODENAME)"
95    DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION)
96  else
97    DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME)
98  endif
99endif
100
101ifeq "" "$(PLATFORM_SECURITY_PATCH)"
102  # Used to indicate the security patch that has been applied to the device.
103  # Can be an arbitrary string, but must be a single word.
104  #
105  # If there is no $PLATFORM_SECURITY_PATCH set, keep it empty.
106  PLATFORM_SECURITY_PATCH := 2015-10-01
107endif
108
109ifeq "" "$(PLATFORM_BASE_OS)"
110  # Used to indicate the base os applied to the device.
111  # Can be an arbitrary string, but must be a single word.
112  #
113  # If there is no $PLATFORM_BASE_OS set, keep it empty.
114  PLATFORM_BASE_OS :=
115endif
116
117ifeq "" "$(BUILD_ID)"
118  # Used to signify special builds.  E.g., branches and/or releases,
119  # like "M5-RC7".  Can be an arbitrary string, but must be a single
120  # word and a valid file name.
121  #
122  # If there is no BUILD_ID set, make it obvious.
123  BUILD_ID := UNKNOWN
124endif
125
126ifeq "" "$(BUILD_NUMBER)"
127  # BUILD_NUMBER should be set to the source control value that
128  # represents the current state of the source code.  E.g., a
129  # perforce changelist number or a git hash.  Can be an arbitrary string
130  # (to allow for source control that uses something other than numbers),
131  # but must be a single word and a valid file name.
132  #
133  # If no BUILD_NUMBER is set, create a useful "I am an engineering build
134  # from this date/time" value.  Make it start with a non-digit so that
135  # anyone trying to parse it as an integer will probably get "0".
136  BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S)
137endif
138