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@ei-grad
Last active August 5, 2018 23:26
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TRivial INcremental bacKUP script (MOVED TO REPOSITORY)
#!/bin/bash
#
# trinkup - TRivial INcremental bacKUP script
#
# Уж 200 раз твердили Сене:
# Хардлинк спасет от удаленья!
# А кто создать его поможет?
# Crontab и man, тупая рожа!
#
# (c) linux.org.ru, no-dashi
#
# Licensed under DWTFYWWI license, but recommended to be used before drinkup.
#
set -e
if ! which rsync >/dev/null; then
echo "rsync not found!" >&2
exit 1
fi
USAGE="
usage:
$0 <rsync_source> <backups_directory> <number_of_backups> [rsync_args]
Keep calm and drink vodka!
"
SRC="$1"
BACKUPS="$2"
ROTATE="$3"
if [ -z "$SRC" ] || [ -z "$BACKUPS" ] || ! [ -n "$ROTATE" -a "$ROTATE" -gt 1 ] ; then
echo -e "$USAGE" >&2
exit 1
fi
shift 3
if ! [ -d "$BACKUPS" ] ; then
echo "'$BACKUPS' is not a directory!" >&2
exit 1
fi
WORKDIR="$(echo "$BACKUPS/`basename \"$SRC\"`.`date +%s`" | sed 's,/\+,/,g')"
echo "Using '$WORKDIR' as backup destination."
if [ -d `ls -rtd \"$BACKUPS/$(basename "$SRC")\"\.[0-9]* 2>/dev/null | head -n 1` ] ; then
OLDEST="`ls -rtd \"$BACKUPS/$(basename "$SRC")\"\.[0-9]* | sed 's,/\+,/,g' | awk NR==$ROTATE`"
NEWEST="`ls -rtd \"$BACKUPS/$(basename "$SRC")\"\.[0-9]* | sed 's,/\+,/,g' | head -n 1`"
fi
if [ -d "$OLDEST" ] ; then
echo "Reusing $OLDEST to reduce amount of disk operations."
mv "$OLDEST" "$WORKDIR"
fi
if [ -d "$NEWEST" ] ; then
echo "Syncing with $NEWEST..."
cp -laf "$NEWEST/." "$WORKDIR"
fi
echo "Running rsync..."
rsync -a --delete $* "$SRC" "$WORKDIR"
echo "Done."
@thefekete
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I removed the 't' flag from the ls commands on lines 50-52. Backups are time stamped, so ordering by name is ok. Also if a backup is modified by accident, the order is still maintained. Fixes an issue I had with a backup that was modified by accident.

@ei-grad
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ei-grad commented Aug 5, 2018

Moved new version to the repository - https://github.com/ei-grad/trinkup.

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