Invokes <cmd> with proper path for vendored-node

withnode.sh

# usage:
# withnode <cmd> [<args>...]
#
# Invokes <cmd> after adjusting PATH to include the appropriate local node/bin
# directory.  `node/bin` is first located by searching up the directory tree
# starting with the current working directory.
#
function withnode() {
    path=$(pwd)
    while [[ $path != '/' ]]; do
        if [ -x $path/node/bin/node ] ; then
            break;
        fi
        path="$(cd $(readlink "$path"/.. || echo "$path/..") && pwd)"
    done
    if [ ! -x $path/node/bin/node ] ; then
        1>&2 echo "no node found"
        return 1
    fi
    if [ $# == 0 ] ; then
        echo $path/node/bin
        return 0
    fi
    PATH="$path/node/bin":$PATH "$@"
}