[CMake] CMake and Lua

[E. Wing]

> The other is that a non-trivial portion of CMake is written in the scripting
> language ala the Modules directory. So supporting multiple languages becomes
> problematic. Most languages are not designed to mix with other languages. I
> doubt you can mix python and Lua and expect them to be able to access each
> other's variables out of the box. But with the Modules directory we either
> have to have a copy of each module for every possible scripting language, on
> the fly converters between any two scripting languages, or something like
> that to make it work. Trying to figure out how to manage the mixed
> CMakeScript/Lua variables by itself is already a bit of an issue to
> providing a Lua binding much less adding other languages on top of that.
> Hopefully that makes some sense :)

While I agree that the variable problem between CMake-script and any
other language is non-trivial, I think it becomes less of an issue
once you do make it to a well known dynamic language like Lua. There
already seem to be a handful of projects that bridge Lua to other
scripting languages and deal with many things including variable
bridging.


Lunatic Python - two-way bridge between Python and Lua (best documentation)
http://labix.org/lunatic-python

Lux  (embed Lua in Tcl, Python, Perl, Ruby)
http://www.equi4.com/wikis/lua/25

Rua (use Lua under Ruby)
http://rua.rubyforge.org/

Ruby-Lua
http://raa.ruby-lang.org/project/ruby-lua/

Inline::Lua - Perl extension for embedding Lua scripts into Perl code
http://search.cpan.org/~vparseval/Inline-Lua/lib/Inline/Lua.pm

Calling Perl from Lua
http://thomaslauer.com/comp/Calling_Perl_from_Lua

Maybe some day there will be Parrot
http://www.parrotcode.org/
http://www.parrotcode.org/talks/LuaOnParrot.pdf


-Eric