Configure ruff in pyproject.toml and apply its fixes: modern annotations
(X | None, builtin generics, collections.abc), sorted imports, explicit
stacklevel in test warnings.
With --link-dest unchanged files are linked, not copied, so rsync's byte
percentage stayed near zero and the ETA was hours. Use the checked/total
file counts instead, and show no percentage or ETA while still scanning.
On a terminal, run rsync with --info=progress2 and draw its updates as a
progress bar on stderr. The ETA is estimated locally, since rsync reports
the elapsed time when a file finishes. Disable it with --no-progress.
Read the output as it arrives, split on newlines and carriage returns,
instead of all at once with communicate(). This is needed for the
progress bar. Invalid UTF-8 in the output is replaced instead of raising.
Accept None for the missing inputs, output, exclude and keep values and replace them with their defaults in __init__, and annotate the SSH client, which mypy typed as None and so skipped checking the remote code.
Run real rsync into a temp dir to test hard links, keep, remove-before-backup, stray files in the backup dir and the old folder name format, and use a fake Popen to test how rsync return codes are handled.
Fuxino
