Top-level source file name for a package: "?.lua", "?/?.lua", or "?/init.lua"?

[Matt Campbell <mattcampbell@...>]

I've observed three naming conventions for the top-level source file of 
a Lua package, where '?' represents the name of the package:  "?.lua", 
"?/?.lua", and "?/init.lua".  The first and third conventions are 
supported by the default package.path in Lua 5.1.  The first is used in 
the Kepler binary distribution (at least on Windows), and the second is 
used in the source trees of Kepler packages like CGILua and Xavante.  I 
haven't yet seen anyone else use the third, though I use it myself.

Which is best?  I'm especially curious to know why the Kepler project 
uses different naming conventions in its source and binary 
distributions, and why its source trees use a naming convention that 
Lua's default configuration doesn't support.

I prefer "?/init.lua" because it most closely follows the DRY (Don't 
Repeat Yourself) principle.  With this convention, a package's directory 
tree looks like this:

xavante/
  init.lua
  httpd.lua
  ...

instead of this:

xavante.lua
xavante/
  httpd.lua
  ...

or this:

xavante/
  xavante.lua
  httpd.lua
  ...

While I'm using the Kepler project as an example here, I post this to 
the Lua list because the subject is relevant to the Lua community at large.

Matt