tree d2145c0deee29d2dd45c660795cb41bf106e1da6
parent d528b3c55389139ef1ebcf22633c5aca52fe50b7
author Dmitrii Merkurev <dimorinny@google.com> 1652829037 +0000
committer Dmitrii Merkurev <dimorinny@google.com> 1652829037 +0000

Introduce EROFS compress hints to the Android build system

Make it possible to provide a prebuilt hints file to specify different compression strategies on a file basis for all partitions using:

BOARD_EROFS_COMPRESS_HINTS := <path>/erofs-hints.txt

or separately for every partition using:

BOARD_SYSTEMIMAGE_EROFS_COMPRESS_HINTS := <path>/system-partition-erofs-hints.txt
BOARD_VENDORIMAGE_EROFS_COMPRESS_HINTS := <path>/vendor-partition-erofs-hints.txt

Hints format: Each line is defined by tokens separated by spaces in the following form:

<pcluster-in-bytes> <match-pattern>

pcluster-in-bytes can be specified as 0 which mean file will not be compressed

Bug: 231934752
Test: used dump.erofs -S system.img to verify the system image isn't compressed after specifying BOARD_SYSTEMIMAGE_EROFS_COMPRESS_HINTS := no-compress.txt, where no-compress.txt contains 0 .*
Test: used dump.erofs --nid=<inode-for-all-apk-files> vendor.img to verify apk files are not compressed (the rest of the partition content is compressed)
Test: used dump.erofs -S <all-images> to verify all images are not compressed after specifying BOARD_EROFS_COMPRESS_HINTS := <path>/no-compress.txt
Change-Id: I64054e26af5ea5781c45d2183b7796a9ad2b7927