RE: Custom loaders using Lua file templates
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- Subject: RE: Custom loaders using Lua file templates
- From: "Jerome Vuarand" <jerome.vuarand@...>
- Date: 2008年2月27日 11:37:16 -0500
Jerome Vuarand wrote:
> I really like Lua's file template mechanism ("foo/bar/?.xxx"). But it
> is only useful in searching for Lua or native modules. My system can
> also load XML files and I'd like to be able to "require" those files
> as well. There is a nice custom loader mechanism, but no access to
> the template parser. it wouldn't be hard to duplicate, but it would
> be nicer to be able to use the one that already exists.
>
> Has there been any thought to exposing the parser (specifically the
> findfile() method. Or is there some hidden way to use this that I am
> not seeing? Seems like it could be easily exposed directly:
>
> filename = package.findfile("myfile", "xmlpath")
>
> where xmlpath is a template in package, just like 'path' and 'cpath'.
>
> I can certainly add this to my local copy of Lua, but it would be
> really nice if this were a standard feature.
Some time ago I put some searcher (that's the name of the things in
package.loaders, counter-intuitively) examples on the wiki:
http://lua-users.org/wiki/LuaModulesLoader
http://lua-users.org/wiki/HashedModulesLoader
First one just reimplements the default Lua module loader in Lua. The
second one adds some functionnality over that (here it checks the module
hash with LuaCrypto).