Bash script to search for git repos in a directory, check last backup date, bundle if necessary, and copy to 2 backup locations

Backup_Repos.sh

#!/bin/sh

# COMMENT
DAY=`date +"%Y%m%d-%H-%M"`

# Directory to find Repos
DIR=/cygdrive/c/Users/chc/Documents/Python/

DESTINATION=E:/ReposBackup/
NETWORKDEST=X:/ReposBackup/

for d in `find $DIR -maxdepth 2 -name .git`; do
    cd $d/..;
    PREFIX=${PWD##*/}

    # Last backup file, full path
    LASTBUNDLE=`find $DESTINATION -name *$PREFIX.bundle | sort -r | head -n 1`
    
    if [ "$LASTBUNDLE" == "" ]
    then
        # There was no previous bundle, so this bundle just gets all of
        # the commits.
        echo "First backup for repo $PREFIX"
        `git bundle create $DESTINATION$DAY-$PREFIX.bundle --all`
        `cp $DESTINATION$DAY-$PREFIX.bundle $NETWORKDEST$DAY-$PREFIX.bundle`
    else
        # There's a previous bundle, so let's see if there has been a commit
        # since then
        echo "Repo $PREFIX previously backed up in $LASTBUNDLE"
        LASTFILE=${LASTBUNDLE##*/}
        LASTDATE=$(echo $LASTFILE | cut -d'-' -f 1)
        LASTHOUR=$(echo $LASTFILE | cut -d'-' -f 2)
        LASTMIN=$(echo $LASTFILE | cut -d'-' -f 3)
        
        echo "Last backup on $LASTDATE at $LASTHOUR:$LASTMIN"

        COMMIT=`git log -1 --format=%cd --date=format:"%Y%m%d-%H-%M"`
        LASTCOMMITDATE=$(echo $COMMIT | cut -d'-' -f 1)
        LASTCOMMITHOUR=$(echo $COMMIT | cut -d'-' -f 2)
        LASTCOMMITMIN=$(echo $COMMIT | cut -d'-' -f 3)
        
        echo "Last commit on $LASTCOMMITDATE at $LASTCOMMITHOUR:$LASTCOMMITMIN"

        if (($(($LASTCOMMITDATE$LASTCOMMITHOUR$LASTCOMMITMIN-$LASTDATE$LASTHOUR$LASTMIN)) > 0))
        then
            echo "New commit(s) since last backup"
            `git bundle create $DESTINATION$DAY-$PREFIX.bundle --all`
            `cp $DESTINATION$DAY-$PREFIX.bundle $NETWORKDEST$DAY-$PREFIX.bundle`
        else
            echo "Backed-up since last commit"
        fi
    fi
done