Re: Calling a batch file from within LUA

["Peter Shook" <pshook@...>]

Lua doesn't do string interpolation.  Here's what you do, assuming you are 
using Lua 4

function subst(str, table)
 local v = gsub(str, '$([_%a][_%w]*)',
                function(w) return %table[w] or '' end)
 return v
end

args = {
 Argument1 = [[c:\folder1]],
 Argument2 = [[c:\folder2]],
}

cmd = [[ batch $Argument1 $Argument2 ]]

print(subst(cmd, args))
execute(subst(cmd, args))

$ lua test.lua
batch c:\folder1 c:\folder2

Also have a look at  http://lua-users.org/wiki/HereDoc

- Peter Shook


brian@arandasys.com wrote:
> That would work if i the folder names were always going to be c:\folder1 
> and c:\folder2!
>
> The folder names will be decided at run time by the lua script so they will 
> have to be held in two variables.
> E.g. Argument1 & Argumnet2
>
> So for example Argument1 = c:\folder1
>                Argument2 = c:\folder2
>
> So calling execute[[ batch Argument1 Argumnet2 ]]
> would pass the actual string='Argument1' to the batch file rather that the 
> path held by the varialbe Argument1
>
> So you execute(batch Argument1 Argument2)
> work?
>
> Thanks for your time
> Brian

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