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 # 34 INTERNAL_BUILD_ID_MAKEFILE := $(wildcard $(BUILD_SYSTEM)/build_id.mk) 35 ifneq "" "$(INTERNAL_BUILD_ID_MAKEFILE)" 36 include $(INTERNAL_BUILD_ID_MAKEFILE) 37 endif 38 39 ifeq "" "$(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 := 2.2 45 endif 46 47 ifeq "" "$(PLATFORM_SDK_VERSION)" 48 # This is the canonical definition of the SDK version, which defines 49 # the set of APIs and functionality available in the platform. It 50 # is a single integer that increases monotonically as updates to 51 # the SDK are released. It should only be incremented when the APIs for 52 # the new release are frozen (so that developers don't write apps against 53 # intermediate builds). During development, this number remains at the 54 # SDK version the branch is based on and PLATFORM_VERSION_CODENAME holds 55 # the code-name of the new development work. 56 PLATFORM_SDK_VERSION := 8 57 endif 58 59 ifeq "" "$(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 := REL 63 endif 64 65 ifeq "" "$(DEFAULT_APP_TARGET_SDK)" 66 # This is the default minSdkVersion and targetSdkVersion to use for 67 # all .apks created by the build system. It can be overridden by explicitly 68 # setting these in the .apk's AndroidManifest.xml. It is either the code 69 # name of the development build or, if this is a release build, the official 70 # SDK version of this release. 71 ifeq "REL" "$(PLATFORM_VERSION_CODENAME)" 72 DEFAULT_APP_TARGET_SDK := $(PLATFORM_SDK_VERSION) 73 else 74 DEFAULT_APP_TARGET_SDK := $(PLATFORM_VERSION_CODENAME) 75 endif 76 endif 77 78 ifeq "" "$(BUILD_ID)" 79 # Used to signify special builds. E.g., branches and/or releases, 80 # like "M5-RC7". Can be an arbitrary string, but must be a single 81 # word and a valid file name. 82 # 83 # If there is no BUILD_ID set, make it obvious. 84 BUILD_ID := UNKNOWN 85 endif 86 87 ifeq "" "$(BUILD_NUMBER)" 88 # BUILD_NUMBER should be set to the source control value that 89 # represents the current state of the source code. E.g., a 90 # perforce changelist number or a git hash. Can be an arbitrary string 91 # (to allow for source control that uses something other than numbers), 92 # but must be a single word and a valid file name. 93 # 94 # If no BUILD_NUMBER is set, create a useful "I am an engineering build 95 # from this date/time" value. Make it start with a non-digit so that 96 # anyone trying to parse it as an integer will probably get "0". 97 BUILD_NUMBER := eng.$(USER).$(shell date +%Y%m%d.%H%M%S) 98 endif 99 100
