On Tue, Feb 12, 2013 at 5:59 PM, Reuben Thomas <r...@sc3d.org> wrote:
> I just noticed that there's a backport of Lua 5.2's bit32 library to
> Lua 5.1. That's nice, as it could simplify e.g. luaposix: no need to
> require a different library depending on the version of Lua.
>
> It would be even better if LuaRocks knew that Lua 5.2 included bit32,
> so that if Lua 5.2 is used, LuaRocks thinks that bit32 is already
> installed.
>
> The only problem is that I can't currently think of any other
> circumstance in which this would be useful.
I've thought about that before. It could also assume that luabitop is
already installed if LuaJIT is used. I remember once I brainstormed
about that (thinking also about LuaJIT FFI vs Lua+LuaFFI) and ended up
with a complicated "feature matrix" approach to detect things (a la
auto-tools, which follows the approach of detecting features and not
program versions) and in the end I didn't implement anything.
It wouldn't be hard to hack in a simple test like this:
--- a/src/luarocks/deps.lua
+++ b/src/luarocks/deps.lua
@@ -318,6 +318,8 @@ local function match_dep(dep, blacklist, deps_mode)
local versions
if dep.name == "lua" then
versions = { cfg.lua_version }
+ elseif dep.name == "bit32" and cfg.lua_version == "5.2" then
+ versions = { cfg.lua_version }
else
versions = manif_core.get_versions(dep.name, deps_mode)
end
...but would that break compatibilty? (Or just cause Lua 5.2 installs
using older LR versions to install a useless extra dependency?)
-- Hisham
http://hisham.hm/
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