In order to properly test the document portal, let's also create some
dummy files that are named after the FDs we receive and using the
document-id path as the real portal does
When an URI to a symlink is added to the portal, we open it and we send
the FD (of the target) to the portal. This one has no clue about the original
symlink and so it mounts a file that is named like the target.
g_document_portal_add_documents(), however returns a path that contains
the original name and that one is what is sent to the applications when
used via GDesktopAppInfo.
Basically, this is the situation:
- /tmp/symlink -> /tmp/target
- An application is launched to open file:/tmp/symlink
- The portal creates file:/$XDG_RUNTIME_DIR/doc/ID/target
- Gio converts the path to file:/$XDG_RUNTIME_DIR/doc/ID/symlink
Now, since we can't just pass the symlink to the portal without also
changing the logic there, it's just better to do the conversion ourself,
and so, we use the already-opened fd to figure out the real path of the
opened file, and we return a document file URI that uses the target
basename instead
