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#!/bin/bash
# Copyright (C) 2021 Nicolas Peugnet <n.peugnet@free.fr>
# This file is part of dna-backup.
# dna-backup is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
# dna-backup is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
# You should have received a copy of the GNU General Public License
# along with dna-backup. If not, see <https://www.gnu.org/licenses/>. */
# This script expects the following variables to be exported:
# - DNA_BACKUP: the path to dna-backup binary
# - DNA_PARAMS: the path of the files that desscribes the multiple parameters to test
# - REPO_PATH: the path of the repo the experiment is based on
# - GIT_PATH: the path of the repo git-dir
# - MAX_VERSION: the max number for versions for the experiment
# - SKIP_CHECK: the number of versions to skip checking
# - COMMITS: the name of the file that contains the lists of versions
# - TARGZ: the path of the tar.gz dir
# - DIFFS: the path of the git diff dir
# - REAL: the path of the real size dir
# - GIT_NOPACK: the path of the git nopack dir
log() {
echo -e "\033[90m$(date +%T.%3N)\033[0m" $*
}
set-git-dir() {
echo gitdir: $1 > $REPO_PATH/.git
}
GITC="git -C $REPO_PATH"
OUT=/tmp/dna-backup-exp-out
# Init git nopack dir
rm $REPO_PATH/.git
$GITC init --separate-git-dir=$GIT_NOPACK
$GITC --git-dir=$GIT_NOPACK config gc.auto 0
set-git-dir $GIT_PATH
# "empty tree" commit
prev="4b825dc642cb6eb9a060e54bf8d69288fbee4904"
last=$(tail --lines=1 $COMMITS | cut -f1)
i=0
head -n $MAX_VERSION $COMMITS | while read line
do
# Get hash
hash=$(echo "$line" | cut -f1)
# Check out repo
log "check out $hash"
$GITC checkout $hash 2> $OUT \
|| (log "error checking out"; cat $OUT; exit 1)
# Save real size for this version
log "save real size for this version"
du -b --summarize $REPO_PATH > $(printf "%s.versions/%05d" $REAL $i)
# Create tar.gz for this version
log "create targ.gz for this version"
tar -czf $(printf "%s/%05d.tar.gz" $TARGZ $i) $REPO_PATH
# Create git diff for this version
log "create git diff for this version"
diff=$(printf "%s/%05d.diff.gz" $DIFFS $i)
$GITC diff --minimal --binary --unified=0 -l0 $prev \
| gzip \
> $diff
# Create git nopack for this version
log "create git nopack for this version"
set-git-dir $GIT_NOPACK
$GITC add .
$GITC commit -m $hash &> $OUT \
|| (log "error commiting to nopack"; cat $OUT; exit 1)
ls $GIT_NOPACK/objects/pack
find $GIT_NOPACK -type f -exec du -ba {} + \
> $(printf "%s.versions/%05d" $GIT_NOPACK $i)
set-git-dir $GIT_PATH
# Create dna backups for this version
cat $DNA_PARAMS | while read name flags
do
log "create $name backup for this version"
$DNA_BACKUP commit -v 2 $flags $REPO_PATH $name
done
if [[ $(( $i % $SKIP_CHECK )) == 0 ]]
then
# Check restore from git diffs
log "restore from git diffs"
TEMP=$(mktemp -d)
for n in $(seq 0 $i)
do
diff=$(printf "%s/%05d.diff.gz" $DIFFS $n)
cat $diff \
| gzip --decompress \
| git -C $TEMP apply --binary --unidiff-zero --whitespace=nowarn -
done
cp $REPO_PATH/.git $TEMP/
log "check restore from diffs"
diff --brief --recursive $REPO_PATH $TEMP \
|| log "git patchs restore do not match source"
rm -rf $TEMP
# Check restore from dna backups
cat $DNA_PARAMS | while read name flags
do
log "restore from $name backup"
TEMP=$(mktemp -d)
$DNA_BACKUP restore -v 2 $flags $name $TEMP
log "check restore from backup"
diff --brief --recursive $REPO_PATH $TEMP \
|| log "dna backup restore do not match source"
rm -rf $TEMP
done
fi
prev=$hash
let i++
done
# cleanup
log "clean up $REPO_PATH"
$GITC checkout $last 2> $OUT \
|| (log "error checking out back to latest commit"; cat $OUT; exit 2)
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