decorator

#!/bin/bash

#config
AUTHOR_NAME="YOURNAME"
AUTHOR_EMAIL="YOUREMAIL"


echo -e "\n***PART I***\n"
echo "Generating commit dates"
NOW=$(date +%s)
START=$(echo $NOW-31622400|bc)
COUNT=-1

mkdir -p ./rewrite-tmp
> ./rewrite-tmp/arr

while [ "$START" -lt "$NOW" ]
do
    RAND=$(echo "144000*$RANDOM/32767"|bc)
    START=$(echo "$START+$RAND"|bc)
    if [ "$START" -lt "$NOW" ]
        then
            let COUNT+=1
            >>./rewrite-tmp/arr echo $START
    fi
done
echo "Generation completed"

echo -e "\n\n***PART II***\n"
echo "Deleting old Git repository in $PWD"
rm -rf .git*
echo 'Deletion completed'

git init

git config user.name $AUTHOR_NAME
git config user.email $AUTHOR_EMAIL

>melon echo ''
git add melon

echo 'Generating commits'
for i in $(seq 0 $COUNT); do
    echo -ne $(echo "$i*100/$COUNT" | bc)"%\r"
    >>melon echo 'x'
    git commit -am 'x' >/dev/null
done
echo '100% completed!'


echo -e "\n\n***PART III***\n"


echo "0" > ./rewrite-tmp/count


echo "Intercepting history"
git filter-branch -f --env-filter '

COUNT=$(cat ../../rewrite-tmp/count)

TIMESTAMP=$(head -1 ../../rewrite-tmp/arr)
sed -i "1d" ../../rewrite-tmp/arr

C1="${TIMESTAMP} +0800"

export GIT_AUTHOR_DATE="$C1"
export GIT_COMMITTER_DATE="$C1"

echo $(echo $COUNT+1|bc) > ../../rewrite-tmp/count

echo "\r\c"

' --tag-name-filter cat -- --branches --tags
echo "Interception completed"

rm -rf ./rewrite-tmp