Re: using lua to modify current shell

[Eduardo Ochs <eduardoochs@...>]

On Tue, Mar 6, 2012 at 4:35 PM, Benjamin Ong <human_pitchpipe@hotmail.com> wrote:

Hi,

is it possible to use lua to modify the current shell with system calls? I tried:
    os.execute("shopt -s expand_aliases")
but this executes the call in a system shell, not the current shell.

 thanks

~ ben

Hi Benjamin,

do you think that the code below could do what you need?

The shell function "mylua" works like "lua", but after running the Lua

interpreter it executes the shell commands stored in /tmp/to.sh in the

current shell context... Hint: if "source" looks unfamiliar, see:

http://www.gnu.org/software/bash/manual/html_node/Bourne-Shell-Builtins.html

  function mylua () {

    echo -n > /tmp/to.sh

    lua $*

    source /tmp/to.sh

  }

  # Test:

  mylua -e '

    toshell = function (str)

        f = assert(io.open("/tmp/to.sh", "w+"))

        f:write(str)

        f:close()

      end

    toshell("cd /tmp/")

  '

Cheers,

  Eduardo