Re: Keeping backups until storage runs short (deja-dup style) with command line tools?

[Darac Marjal]

On Thu, Feb 21, 2013 at 02:46:43PM +0300, Johannes Graumann wrote:
> Hi,
> 
> deja-dup has an option to keep backups forever or until storage on the drive 
> backed up to runs short (at which point it starts deleting old backups). 
> Does someone have any pointers on how to copy that behavior using duplicity 
> and/or other CLI tools?

This isn't tested, just typed into mutt, so I might have some syntax
errors.

#!/bin/bash

if [[ ! -d ~/.backup ]]; then
   mkdir ~/.backup
fi

FreeSpace=$(df -PB1 ~/.backup|awk 'NR==2 {print $4}')
FileSize=$(stat -c='%s' $1)

if (( $FileSize >= $FreeSpace )); then
   # No room to copy file. Clear out oldest file
   rm $(ls -tr ~/.backup|tail -n 1)
fi

cp $1 ~/.backup/$1.$(date +'%Y%m%d')

---------------------

Eliminating race conditions etc are left as an exercise for the reader
:)

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