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Command-line tool to manipluate impermanance old roots in btrfs
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README.md

oroot

Browse and enumerate historical paths from old root snapshots.

This is intended to be used alongside setups like nix-community/impermanence with btrfs, where previous roots are kept under /btr_pool/old_roots by default.

Usage

List the contents of the same path across old roots:

oroot ls /home/username/.config

Show only snapshots where that path is a non-empty directory:

oroot ls --non-empty /home/username/.config

Enumerate matching directories for integration with other programs:

oroot enum ~

This prints paths like:

/btr_pool/old_roots/2026-06-21_20-16-18/home/username
/btr_pool/old_roots/2026-06-22_09-25-08/home/username

~ is expanded to $HOME.

Example with sxyazi/yazi,

yazi $(oroot enum ~/Downloads | sort -r | head -9)
  • sort -r: sort in reverse order, showing newer roots first.
  • head -n 9: keep the first 9 entries, since yazi only supports 9 tabs.

Separators

enum uses newline separation by default. Use --separator to choose another separator:

oroot enum --separator '\0' ~
oroot enum --separator ' ' ~
oroot enum --separator '\r\n' ~