#!/bin/sh

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#  to you under the Apache License, Version 2.0 (the
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#  
#    http://www.apache.org/licenses/LICENSE-2.0
#    
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# Cleanup database archive.
# Keep the last two backups and corresponding WAL files.

here=`echo "import os; print os.path.realpath('$0')" | python`; here=`dirname $here`
root=`echo "import os; print os.path.realpath('$1')" | python`

baks=`ls $root/sqldb/archive | sort -r | grep "\.backup$" | head -2`
wals=`ls $root/sqldb/archive | sort -r | grep -v "\.backup\.tar\.gz$"`
tars=`ls $root/sqldb/archive | sort -r | grep "\.backup\.tar\.gz$"`

for f in $baks; do
    if [ "$lastbak" = "" ]; then
        lastbak=$f
    else
        prevbak=$f
    fi
done

w=0
for f in $wals; do
    if [ "$w" = "2" ]; then
        rm $root/sqldb/archive/$f
    fi
    if [ "$w" = "1" ]; then
        w=2
    fi
    if [ "$f" = "$prevbak" ]; then
        w=1
    fi
done

t=0
for f in $tars; do
    if [ "$t" = "2" ]; then
        rm $root/sqldb/archive/$f
    fi
    t=$((t+1))
done