commit b25aee08cadaab88acf96989abc838803d904ef1
author Inseob Kim <inseob@google.com> Tue Jul 30 18:27:42 2019 +0900
committer Inseob Kim <inseob@google.com> Fri Aug 23 06:29:49 2019 +0000
tree 153899643e1d699866f4f69b18fbb9d9c1b715ff
parent 2d9ef878317bad498da8525b89e6ed1ae012b11a

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: I40780d770d0e55fa3c164a5b39911a47c1145284
Merged-In: I40780d770d0e55fa3c164a5b39911a47c1145284
Merged-In: Ica19c67957831670f2e8ee39befe2ebecdc08ea6
(cherry picked from commit 57617096dbef0bb039736d4d492a0d70b4a35898)