commit | dddcb57582ac641e24df851cb130f04cca097455 | [log] [tgz] |
---|---|---|
author | Anton Hansson <hansson@google.com> | Tue Nov 24 09:32:14 2020 +0000 |
committer | Anton Hansson <hansson@google.com> | Tue Jan 05 15:01:26 2021 +0000 |
tree | e12dbffb978a562181434dd07e4026f826163ed4 | |
parent | e4fd55c9923cff07777bd95be8c7cbd5c3713488 [diff] |
Refactor derive_sdk to be more testable Refactor the code into a reusable library that is used from the derive_sdk binary as well as a newly added cc_test. The code now accepts an argument for which dir to scan for mounted modules. Add a simple test for the current system image R SDK version for now. Bug: 173188089 Test: atest derive_sdk_test Change-Id: If7442d515d55b35174d396cc579ee2c9865da2b5
SdkExtensions is a module that decides the extension SDK level of the device, and provides APIs for applications to query the extension SDK level.
The module is packaged in an apex, com.android.sdkext
, and has two components:
bin/derive_sdk
: Native binary that runs early in the device boot process and reads metadata of other modules, to set system properties relating to the extension SDK (for instance build.version.extensions.r
).javalib/framework-sdkextension.jar
: This is a jar on the bootclasspath that exposes APIs to applications to query the extension SDK level.derive_sdk
is a program that reads metadata stored in other apex modules, in the form of binary protobuf files in subpath etc/sdkinfo.binarypb
inside each apex. The structure of this protobuf can be seen here. The exact steps for converting a set of metadata files to actual extension versions is likely to change over time, and should not be depended upon.
The module exposes a java class SdkExtensions
in the package android.os.ext
. The method getExtensionVersion(int)
can be used to read the version of a particular sdk extension, e.g. getExtensionVersion(Build.VERSION_CODES.R)
.
For every new Android SDK level a new extension version should be defined. These are the steps necessary to do that:
SdkExtensions.getExtensionVersion
API support the new extensions.RollbackManagerServiceImpl#getExtensionVersions
to account for the new extension version.TODO(b/173188089): expand this section when derive_sdk is reimplemented