Script to convert Jolla1 vault (backup) to JollaC version, either on device or using a Backup.tar

convert_vault.sh

#!/bin/bash

set -e

DATE_STRING=`date -u "+%Y-%m-%dT%H-%M-%SZ"`
TMP_PATH=$HOME/vault_tmp_$DATE_STRING
TARGET_ARCHIVE=$HOME/sailfish_backup_$DATE_STRING.tar
FOLDERS="Accounts Browser Gallery Media Messages Notes People Phone"

if [ -n "$1" ]; then
  VAULT_PATH=$TMP_PATH/.vault
else
  VAULT_PATH=$HOME/.vault
  if [ ! -d $VAULT_PATH ]; then
    echo ".vault not found in home";
    echo "run on Jolla1 or provide path to Backup.tar";
    exit 1;
  fi
fi

mkdir -p $TMP_PATH/vault/
mkdir $TMP_PATH/old_backup/
tar xf $1 -C $TMP_PATH/old_backup/

pushd $TMP_PATH/ > /dev/null
git clone old_backup $VAULT_PATH
ln -s $TMP_PATH/old_backup/.git/blobs $VAULT_PATH/.git/blobs

for folder in $FOLDERS
do
  if [ -d $VAULT_PATH/$folder ]; then
    cp -Lr $VAULT_PATH/$folder $TMP_PATH/vault/
  fi
done

tar cf $TARGET_ARCHIVE --transform "s#\(.*\)#tmp/vault/\1#g" vault/
rm -rf $TMP_PATH
popd > /dev/null
echo "backup archive written to $TARGET_ARCHIVE"

Nice Script, thanks!
But I had to change "#!/bin/sh" to "#!/bin/bash" to make it work on my debian machine.

thanks for the feedback, changed it to bash for now