Script that updates git author/committer

git_author_conv.sh

#!/bin/bash

export authors_file=./author_conv_file.txt

if [ ! -f "$authors_file" ]; then
	echo "Bad file: $authors_file"
	exit 1
fi

git filter-branch -f --env-filter '

get_name () {
     grep "^$1=" "$authors_file" |
     sed "s/^.*=\(.*\) <.*>$/\1/"
}

get_email () {
     grep "^$1=" "$authors_file" |
     sed "s/^.*=.* <\(.*\)>$/\1/"
}

GIT_AUTHOR_NAME=$(get_name $GIT_COMMITTER_NAME) &&
    GIT_AUTHOR_EMAIL=$(get_email $GIT_COMMITTER_NAME) &&
    GIT_COMMITTER_NAME=$GIT_AUTHOR_NAME &&
    GIT_COMMITTER_EMAIL=$GIT_AUTHOR_EMAIL &&
    export GIT_AUTHOR_NAME GIT_AUTHOR_EMAIL &&
    export GIT_COMMITTER_NAME GIT_COMMITTER_EMAIL
' -- --all