Git: rewrite commit authors

git-rewrite-authors

#!/bin/bash

# get the email address to replace
echo "  Enter OLD_EMAIL to replace: "
read -r oldEmail

# get the correct authors email to replace with
echo "  Enter CORRECT_EMAIL:"
read -r correctEmail

# get the name of the author to replace with
echo "  Enter CORRECT_NAME: "
read -r correctName

# backup current git history
cp ./.git ./.git.backup
printf "  .git/ copied to .git.backup/"

filter="
OLD_EMAIL=\"$oldEmail\"
CORRECT_NAME=\"$correctName\"
CORRECT_EMAIL=\"$correctEmail\"
if [ \"$GIT_COMMITTER_EMAIL\" = \"$OLD_EMAIL\" ]
then
    export GIT_COMMITTER_NAME=\"$CORRECT_NAME\"
    export GIT_COMMITTER_EMAIL=\"$CORRECT_EMAIL\"
fi
if [ \"$GIT_AUTHOR_EMAIL\" = \"$OLD_EMAIL\" ]
then
    export GIT_AUTHOR_NAME=\"$CORRECT_NAME\"
    export GIT_AUTHOR_EMAIL=\"$CORRECT_EMAIL\"
fi
"

# do replacement
git filter-branch --env-filter "$filter" --tag-name-filter cat -- --branches --tags

printf "... Done.\n"