Batch update the GitHub user or organization in all repository remotes under the given directory.

gh_update_remotes_owner.sh

# Batch update the GitHub user or organization in all repo remotes under the given directory.
# Does not work with JRuby.
#
# usage: usage: gh_update_remotes_owner dir oldorg neworg
gh_update_remotes_owner()
{
    if [ $# -lt 3 ]; then
	echo "usage: gh_update_remotes_owner dir oldorg neworg" >&2
	return 1
    fi

    root=$1
    oldorg=$2
    neworg=$3

    # Does not work with JRuby, even with $_.sub
    find "$root" -type f -wholename '*/.git/config' -exec ruby -i -pe"sub %r|(github.com):$oldorg/|, '\1:$neworg/'" {} +
}