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#!/bin/bash
# $Id$
# Author: Lea Wiemann <LeWiemann@gmail.com>
# Copyright: This file has been placed in the public domain.
# Options:
#
# -f Do not print feedback.
set -e
trap "echo; echo Exiting with error.; trap - 0; exit 1" 0 1 2 3 15
test "$1" == -f && printfeedback= || printfeedback=1
function feedback() {
test "$printfeedback" && echo "$@" || true
}
function do_backup() {
# If any of the tests fails, the script terminates silently.
feedback "--- Backing up svn+ssh://$HOST$REMOTEDIR ---"
feedback "Checking that all necessary variables are set."
test -n "$BACKUPDIR"
test -n "$HOST"
test -n "$REMOTEDIR"
if test ! -d "$BACKUPDIR"; then
feedback "Creating backup directory $BACKUPDIR."
mkdir --parents --verbose "$BACKUPDIR"
fi
if test ! -f "$BACKUPDIR/db/fs-type"; then
feedback
echo "$BACKUPDIR/db/fs-type not found."
echo "Please fetch the first copy of the repository database yourself."
echo "I only assist in doing incremental backups of repository databases."
exit 1
fi
feedback "Checking that repository format is FSFS."
test "`cat "$BACKUPDIR/db/fs-type"`" == fsfs
feedback "Changing to database directory $BACKUPDIR/db."
cd "$BACKUPDIR/db"
feedback "Getting local current revision number."
LOCALREVNUM="`cat current | sed 's/ .*//'`"
feedback "Checking that current.new doesn't exist."
if test -f current.new; then
feedback
echo "Make sure that no other instance of this script"
echo "is running and delete the following file:"
echo "$BACKUPDIR/db/current.new"
exit 2
fi
feedback "Getting remote 'current' file."
ssh "$HOST" "cat '$REMOTEDIR/db/current'" > current.new
feedback "Getting remote current revision number."
REMOTEREVNUM="`cat current.new | sed 's/ .*//'`"
feedback "Checking that we got a response from the server."
test -n "$REMOTEREVNUM"
if ! test "$LOCALREVNUM" -le "$REMOTEREVNUM"; then
feedback
echo "ERROR: Local revision number ($LOCALREVNUM) greater"
echo " than remote revision number ($REMOTEREVNUM)."
echo "Wrong backup directory or changed repository?"
exit 2
fi
if test "$LOCALREVNUM" -eq "$REMOTEREVNUM"; then
feedback "No backup needed; at revision $LOCALREVNUM."
feedback "Removing 'current.new'."
rm current.new
else
LOCALREVNUM="$[$LOCALREVNUM+1]"
feedback "Backing up from revision $LOCALREVNUM to revision $REMOTEREVNUM."
test "$printfeedback" && verbose=-v || verbose=
ssh "$HOST" "
set -e;
cd $REMOTEDIR/db/;
nice -n 10 tar cf - \`seq -f revs/%g $LOCALREVNUM $REMOTEREVNUM\` \`seq -f revprops/%g $LOCALREVNUM $REMOTEREVNUM\` | nice -n 10 bzip2 -c" \
| tar $verbose -xjf -
feedback "Renaming 'current.new' to 'current'."
mv current.new current
fi
feedback "Done."
feedback ""
}
feedback 'Reading ~/.fsfsbackup.'
feedback ''
source ~/.fsfsbackup
feedback 'Finished.'
trap - 0 1 2 3 15
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