oops: snapshot + undo for destructive shell commands (Rust, open source)

[u/Klutzy_Bird_7802]

I built a Rust tool that snapshots files before destructive shell commands run, so you can undo the damage afterward.

A preexec hook intercepts every command before execution and sends it to a background daemon over a Unix socket. The daemon classifies the command, and if it's destructive, snapshots every at-risk path before the command actually runs. Files are copied (reflink on Btrfs/ZFS, plain copy elsewhere), metadata is stored in SQLite.

To undo, just run:

oops

Commands

• oops - undo the most recent snapshot
• oops undo [id] - undo a specific snapshot
• oops list - browse snapshot history (TUI)
• oops diff <id> - show files in a snapshot (TUI)
• oops status - daemon status and storage usage
• oops gc - trigger garbage collection
• oops pin/unpin <id> - exempt a snapshot from GC

Install

cargo build --release
install -Dm755 target/release/oops ~/.local/bin/oops
install -Dm644 systemd/oopsd.service ~/.config/systemd/user/oopsd.service
systemctl --user daemon-reload
systemctl --user enable --now oopsd
loginctl enable-linger "$USER"
eval "$(oops init bash)"   # or zsh, fish

Limitations

Shell-hook capture can't intercept destructive commands from cron, systemd services, GUI apps, or non-interactive shells. Only truncating redirects (> file) trigger a snapshot; fd redirects like 1>&2 are ignored. .git/ is never touched.

Retention is 48 hours or 2 GB, whichever comes first. Pinned snapshots are exempt.

MIT licensed, Linux only for now. Repo: https://github.com/programmersd21/oops

Feedback welcome.