If you press `e` on a file of a commit, and a later commit deleted that
file, the editor is opened on a path that doesn't exist. Most editors
then create it as a new, empty file. This is confusing. The same
happens with `o`, and with any other file that the worktree it is
opened from doesn't have. An example is a file that is added in a branch
that isn't checked out anywhere, since it is opened from the current
worktree.
Show an error instead of opening the editor. For a range selection in
the commit files panel, show it only if none of the selected files
exist. Otherwise open the existing ones and leave out the others
silently; an error shown only after returning from the editor would
come too late to be useful.
Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]>
