Bash script for changing git author info

git-change-author.sh

#!/bin/sh

# https://help.github.com/en/articles/changing-author-info

git filter-branch --env-filter "
OLD_EMAIL=\"$1\"
CORRECT_NAME=\"$2\"
CORRECT_EMAIL=\"$3\"

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
" --tag-name-filter cat -- --branches --tags