A linked smart object's path comes from the document. Every place that
follows it now goes through one resolver (photocraft_io::doc_path, built on
craft-docpath): a relative path is taken from the document's folder, and
only local files or files on the share the document itself is on are
opened. Paths to other computers, device paths and URLs are treated like a
missing file: the layer keeps its last rendering.
- Link watch: such links are not stamped, and no background look starts
when no link of the document is followed.
- Update Modified Content and other re-renders read only followed files;
the error names why a link is not followed.
- Package lists such links as missing instead of copying them.
- Reveal in Finder for a linked layer shows only a followed file; the
document's own Reveal is unchanged. The macOS invocation ends options
with `--`, and Explorer is not asked to select a path containing a comma
or a quotation mark.
- Place Linked stores a relative path as an absolute one.
The document path travels to smart-object renders in a thread-local scope
entered by Session::edit, command dispatch and background jobs.
Co-authored-by: David Mann <daaavid.mann@gmail.com>
