Gitで過去のコミットのAuthorとCommitterを一括変更する

author-and-committer-bulk-change.sh

#!/bin/sh

git filter-branch --env-filter '

OLD_EMAIL="old@example.com"
CORRECT_NAME="new-user-name"
CORRECT_EMAIL="new@example.com"

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

# AND push the corrected history
#
# git push --force --tags origin 'refs/heads/*'