luarocks selective require mapping

[Thomas Harning <harningt@...>]

In preparing a rockspec for luajson, I stumbled into what I think  
might be a problem for testing...

I want my test scripts to use the version of luajson that is in the  
source tree (configured using package.path), however the  
luarocks.require uses the package in the luarocks repository instead.

Is there any elegant mechanism to make luarocks work selectively to  
fit the following situation...

 * Try to use lua modules from a local path
 * Try to use luarocks modules
 * Use lua modules from default paths

My current mechanism is a hack of sorts:

==BEGIN
local old_require = require
require("luarocks.require")
local luarocks_require = require

function require(module, ...)
	if module == "luajson" or module:match("^luajson%.") then
		return old_require(module, ...)
	end
	return luarocks_require(module, ...)
end
== END

Where my default LUA_INIT is "require('luarocks.require')"...

Any better solutions?


Also: I originally used the ?/init.lua pattern for luajson, but it  
appears that luarocks doesn't work with this, so instead I have to use  
a json.lua outside of the json/ directory tree.  Perhaps ?/init.lua  
should be added to the capabilities of luarock's build system...