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#!/bin/bash
# This script expects the following variables to be exported:
# - DNA_BACKUP: the path to dna-backup binary
# - REPO_PATH: the path of the repo the experiment is based on
# - MAX_VERSION: the max number for versions for the experiment
# - COMMITS: the name of the file that contains the lists of versions
# - BACKUP: the path fo the dna-backup dir
# - DIFFS: the path of the git diff dir
GITC="git -C $REPO_PATH"
# "empty tree" commit
prev="4b825dc642cb6eb9a060e54bf8d69288fbee4904"
last=$(tail --lines=1 $COMMITS | cut -f1)
i=0
cat $COMMITS | while read line
do
hash=$(echo "$line" | cut -f1)
$GITC checkout $hash
# create diff for this version
$GITC diff --minimal --binary --unified=0 $prev \
| gzip \
> "$DIFFS/$i.diff.gz"
# create backup for this version
$DNA_BACKUP commit -v 2 $REPO_PATH $BACKUP
if [[ $(( $i % 4 )) == 0 ]]
then
# check diff correctness
TEMP=$(mktemp -d)
for n in $(seq 0 $i)
do
cat "$DIFFS/$n.diff.gz" \
| gzip --decompress \
| git -C $TEMP apply --binary --unidiff-zero --whitespace=nowarn - \
|| echo "Git patchs do not match source"
done
cp $REPO_PATH/.git $TEMP/
diff --brief --recursive $REPO_PATH $TEMP \
|| echo "dna-backup restore do not match source"
rm -rf $TEMP
# check backup correctness
TEMP=$(mktemp -d)
$DNA_BACKUP restore -v 2 $BACKUP $TEMP
diff --brief --recursive $REPO_PATH $TEMP
rm -rf $TEMP
fi
prev=$hash
let i++
if [[ $i == $MAX_VERSION ]]
then
break
fi
done
# cleanup
$GITC checkout $last
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