This script fixes the email in commit history. Usage: fix_git_eamil.sh <old_email> <new_email>

fix_git_email.sh

#!/bin/bash
# This script changes the emails of author and committer
# from the first argument to the second

old=$1
new=$2
if [[ -z $old ]]; then
    echo "The original email is expected!"
    exit 1
fi

if [[ -z $new ]]; then
    echo "The new email is expected!"
    exit 1
fi

if [[ ! $old =~ "@" ]]; then
    echo "Invalid original email"
    exit 1
fi

if [[ ! $new =~ "@" ]]; then
    echo "Invalid new email"
    exit 1
fi

# export is mandatory otherwise the git filter-branch
# process can not see these variables
export old
export new
git filter-branch -f --env-filter '
   echo "Start -- $old" >> /tmp/no_match.lst
   if [[ $GIT_AUTHOR_EMAIL = $old ]]; then
	   export GIT_AUTHOR_EMAIL=$new
   fi
   if [[ $GIT_COMMITTER_EMAIL = $old ]]; then
	   export GIT_COMMITTER_EMAIL=$new
   fi
' -- --all
unset old
unset new

# vim: set ai nu nobk expandtab sw=4 ts=4 syntax=sh: