tree cc06898c7b5cfddedaeb9b44b92909a78bb89d45
parent ae0274497028964751310f4fd15117953bf30806
author Googler <jhorvitz@google.com> 1728320304 -0700
committer Copybara-Service <copybara-worker@google.com> 1728320393 -0700

Use a visitor pattern to consume fileset symlinks.

Instead of constructing a `FilesetManifest`, callers use a `Visitor` that is invoked for every symlink in the fileset. This allows for an optimization: when the fileset has no relative symlinks (or we are ignoring relative symlinks), we can do a single-pass visitation without building up maps.

Additionally, callers are responsible for concatenating the fileset-relative and execroot-relative paths to their roots. This reduces garbage from concatenating paths, since some callers don't need them.

PiperOrigin-RevId: 683222046
Change-Id: I80f04306e7a617d3c3e630c56d96b2c968eb1d42