pub fn move_file(src: &Path, dst: &Path) -> Result<()>Expand description
Move src to dst, creating dst’s parent directory first.
Used by M-SAVE.1’s MP4 export path to promote the finalized
scratch file into the user’s chosen folder.
Tries an atomic std::fs::rename first — fast and the common
case, since the scratch dir and the default output dir are
normally on the same (home) volume. Rename fails across volumes
(EXDEV) — e.g. exporting to an external drive — so on any
rename error it falls back to copy-then-remove, which works
across devices.
§Errors
Returns the underlying std::io::Error when the parent dir
can’t be created, or when the copy fallback itself fails (source
missing, destination not writable, disk full).