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.
The config values are now a TypedDict, so check inputs for None before sorting, use literal keys and use ConfigArgs as the fake _read_config() return type.
Use a fake SSH client that runs commands locally to test remote path resolution, removing old backups, finding the last backup and the rsync arguments, plus the login paths with a fake paramiko client and real keys made by ssh-keygen.
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.
Test how command line and config values are combined, the exit codes for an incomplete SSH setup and a bad config, and the user detection under sudo/doas (simulated by patching geteuid and the environment).
Configure pytest in pyproject.toml to import the repo copy, add a conftest that keeps tests out of the journal and desktop notifications, and test reading the config file and expanding paths.
Fuxino
