Re: package location awareness?

[PA <petite.abeille@...>]

On Feb 02, 2005, at 22:38, David Burgess wrote:

> Not too sure what you want, start with an investigation of the  
> "package" table.

Good thinking!

package.loaded: { "ATask" = "table: 0x109c70"; "string" = "table:  
0x101bc0"; "debug" = "table: 0x1023c0"; "LUTask" = "table: 0x10a9c0";  
"LUClass" = "table: 0x108730"; "LUObject" = "table: 0x1058c0";  
"MyClass" = "table: 0x103ca0"; "table" = "table: 0x1012a0"; "io" =  
"table: 0x101320"; "os" = "table: 0x101910"; "MyOtherClass" = "table:  
0x105eb0"; "math" = "table: 0x101ee0"; "LUMap" = "table: 0x107310";  
"coroutine" = "table: 0x101000"; "LUList" = "table: 0x106e40" }

This is useful by itself :)

But no path in sight :/

> cpath and path may be what you are after although I suspect not.

No, they define the actual search path.

> When you use "require" the package.path defines where the source
> will be loaded from. Which part of the package.path is not recorded.
>
> > As an aside, how does one find out the OS file separator (e.g. '/')
> > from Lua itself?
>
> You cant. (Someone tell me if I am wrong). In 5.1 there nothing Lua  
> does that
> needs it ither than the C defined LUA_DIRSEP which is not aptly named.
> It will probably be defined as "" for me. You could deduce it from  
> package.path
> and package.cpath

Hmmm... that sound pretty good :)

Not sure how I would deduce the separator though. My path look  
something like this:

package.path:  
./?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/ 
init.lua
package.cpath: ./?.so;/usr/local/lib/lua/5.1/?.so

What would be a workable way to identify the separator? Looking at  
non-alphanumeric characters before the question mark?

> or externally define PATH_SEP so you could use
> os.getenv'PATH_SEP'

I would prefer to have everything pretty much self-contained.

Cheers

--
PA, Onnay Equitursay
http://alt.textdrive.com/