add basic follows_symlink support about kati HOT 3 CLOSED

Though you have workarounded the issue by not using --use_find_emulator, two issues were found thanks to your report:

1. Kati thought symlink/file did not exist when symlink points a path outside the directories FindEmulator knew
2. Kati's findleaves.py didn't follow symlinks and it didn't fall back to the command execution.

1 was fixed by bd3bb23
2 was fixed by b717561

As for 2, for your case (all top-level directories are symlinks) FindEmulator still just falls back to normal $(shell) command execution. This means you still don't have the performance improvement by FindEmulator (~20 secs for me), but you should be able to build your branch with --use_find_emulator after updating build/kati.

from kati.

and

407d8d4

should make FindEmulator work nicely with your setup.

from kati.

It's been performing well in a variety of test cases - thanks!

from kati.