Implement sysprop_library API stability check
sysprop_library now checks the API stability itself, cutting dependency
on java_sdk_library. Under the directory {module_dir}/api,
{module_name}-current.txt and {module_name}-latest.txt hold API
signatures.
When sysprop_library is built, or a user run "m {module_name}-check-api"
command, API check is performed. First, current.txt must have exactly
same signature with built sysprop_library module. Second, current.txt
must be compatible with latest.txt.
Build system emits a handy error message to generate/update those API
files, in case of missing or mismatching. Also, a script file for
freezing API files is introduced.
Bug: 131637873
Test: 1) m && boot blueline
Test: 2) m {sysprop_library} performs API check
Test: 3) manual test for check-api, freezing api
Change-Id: I95e0e38a24e78bb9526248ea7efc12d7fbf2d35a
Merged-In: I95e0e38a24e78bb9526248ea7efc12d7fbf2d35a
(cherry picked from commit a9565afdb024c77b8192f0b7720847ee92a058d9)
6 files changed