Bash Script for svn to git migration

svnMigGit.sh

#!/bin/bash
# Script checkout SVN as git repository

#constants
SVN_TMP_FILE=svnlog.txt
BRANCH_FILE=branch.txt
LATEST_ANNUAL=""

#variables
revision=""
project=""

#ARGUMENTS: SVN-URL BRANCHES 
SVN_URL=$1
FILTER_YEAR=$2


if [[ $1 == "" ]]; then
    echo "Missing SVN-URL: svnmigration.sh SVN-URL"
    exit 0
fi

#get folder / project name
delimiter=/
s=$SVN_URL$delimiter
project=""

while [[ $s ]]; do
    project=( "${s%%"$delimiter"*}" );
    s=${s#*"$delimiter"};
done; 

echo "###### ${project} #####" 

echo "Checking for latest revision in ${SVN_URL}..."
svn log $SVN_URL > $SVN_TMP_FILE

while read row; do
    # filter only commits (commit/user/date/details)
    if [[ $row == *"|"* ]]; then
        # split REV | USER | DATE | LINE
        # echo "${row}"
        IFS="|" read -ra list <<< "$row"
        
        #revision
        svn_revision="${list[0]}"
        
        #date
        commit_date="${list[2]}"
        year=${commit_date:0:5}
        
        #echo "${svn_revision} - ${year}"
        if [[ "$year" -ge "$FILTER_YEAR" ]]; then
            #echo "${year} - ${FILTER_YEAR}"
            revision="${svn_revision}"
        fi
    fi
done < $SVN_TMP_FILE

#remote tmp file
rm -f $SVN_TMP_FILE

#trim spaces
revision="$(echo -e "${revision}" | tr -d '[:space:]')"

echo "Latest SVN revision: ${revision} (${FILTER_YEAR})"


#clone svn repository
echo "Clone ${SVN_URL}..."
clone_argument="-${revision}:HEAD"
git svn clone -s $clone_argument $SVN_URL


echo "######################################"
echo "SVN preparation finished"
echo "Next step:"
echo "git remote add origin URL\ngit push -u origin --all\ngit push origin --tags"