# Backupper

a compressing deduplicating snapshot backup system, written in Tcl.

- dependencies:
  - sqlite3
  - tcllib

the script expects a linux environment, as it reads `/proc/cpuinfo` to get the number of cores. I believe there are no other platform-specific behaviors, so patching this script for windows or other unices would be trivial.

to use it

1. `backupper.tcl init <store>` some store directory. this is where backup data will go. backupper does not care what or where this directory is as long as it has read/write.
2. `backupper.tcl importtar <store> <name> <tarball>` a tarball. the file data inside of it will be extracted and deduplicated, and the tarball itself will be stored with an id and hash.
3. `backupper.tcl export <store> <id>` the id from step 2. the tarball will be replicated identically in the current directory, with file data restored

there is also a simpler `importlist` command that takes in a list of files, one per line, and works similarly. on export, they will be placed in a local directory.

there are also commands for inspecting the contents of the store, run the script with no args for more info.

to list the backups in a store, run `sqlite3 -box <store>/index.db 'select rowid, * from tarballs'`. at some point I might add a command for this.

GLHF don't sue me if this fails spectacularly