bash function to checkout svn:externals when using git-svn

gistfile1.sh

function git-co-externals() {
    (
    cd $(git rev-parse --show-toplevel) && git svn show-externals | grep "^/" |
    while read a b c
    do
        # remove first character which is a '/'
        local=${a:1}
        if [ -z $c ]
        then
            url=$b
            rev=""
        else
            url=$c
            rev=$b
        fi
        mkdir -p $local
        (
        echo "-------------------------------------"
        echo "cd $local"
        cd $local && if [ -d .svn ]
        then
            echo "svn up $rev"
            svn up $rev
        elif [ -d .git ]
        then
            if [ -z $rev ]
            then
                echo "git svn rebase && git-co-externals"
                git svn rebase && git-co-externals
            else
                echo "/!\ Can't issue 'git svn rebase' on a specific revision"
                echo "You should not use a local git repository in that case"
            fi
        else
            echo "svn co $rev $url ."
            svn co $rev $url .
        fi
        )
    done
    )
}