Fixes#17290
Fixes following issues:
- Cache checksums turning off while walking a broken symlink.
- Cache checksums were taken from symlinks while targets were actually copied.
- Copying a symlink pointing to a file to a directory used the basename of the target as a destination basename, instead of basename of the symlink.
Signed-off-by: Tonis Tiigi <tonistiigi@gmail.com>
Upstream-commit: 47da59f7ec4ee0f49d47a9b32abb137bb30b2c48
Component: engine
8bd20475ee