node_versions bash function

gistfile1.sh

node_versions () 
{ 
    local ver_re='v[0-9]+\.[0-9]+\.[0-9]+';
    local active="$(node --version 2> /dev/null)";
    local installed=($(nvm ls | grep -vE ':|->' | grep -oE "$ver_re" | sort -u));
    local aliased=($(nvm alias | sed 's/ -> /:/'));
    local latest="$(curl -s http://nodejs.org/dist/latest/ -o - | grep -oE "$ver_re" | sort -u)";
    local output="";
    curl -s http://nodejs.org/dist/ -o - | grep -oE "$ver_re" | sort -uV | while read v; do
        output="$v";
        for i in "${installed[@]}";
        do
            [[ "$v" == "$i" ]] && output="$output (installed)";
        done;
        [[ "$v" == "$active" ]] && output="$output (active)";
        [[ "$v" == "$latest" ]] && output="$output (latest)";
        for i in "${aliased[@]}";
        do
            [[ "$v" == "${i##*:}" ]] && output="$output (alias=${i%%:*})";
        done;
        echo $output;
    done
}