Re: require() relative to calling file
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- Subject: Re: require() relative to calling file
- From: Javier Guerra Giraldez <javier@...>
- Date: Tue, 7 Feb 2017 10:59:20 +0000
On 7 February 2017 at 02:23, Stephen Irons <stephen.irons@clear.net.nz> wrote:
> However, in the source code, it is package.searchpath() (file
> loadlib.c, function searchpath()) that implements the way Lua finds
> modules. searchpath() modifies the name of the module to find
> (replacing '.' with the directory separator), then takes a list of
> path templates (from package.path), replaces '?' with the modified
> name of the module, and passes each in turn to the C standard function
> fopen(). This code is all very straightforward, with no special cases.
>
What I would like is that package.searchpath() would replace another
character, like '$' with the directory where the function calling
'request' resides. a crude implementation:
--------------
local function getcallingdir(lvl)
for i = (lvl or 2), 1000 do
local fi = debug.getinfo(i, 'S')
if not fi then break end
if fi.source and fi.source:sub(1,1) == '@' then
local fname = fi.short_src or fi.source:sub(2)
return fname:match('^(.*)/[^/]*$') or fname
end
end
end
local oldsearch=package.searchpath
function package.searchpath (name, path, sep, rep)
local calldir = getcallingdir(3)
if calldir then
path = path:gsub('%$', calldir)
end
return oldsearch(name, path, sep, rep)
end
-----------------------
something like this would make it easy to write multi-source-file
packages that can be installed anywhere, or even used as a "private"
part of a bigger bundle. a "main" file could require() other
submodules with relative paths from itself, instead of having to
specify the whole path or making all pieces directly visible to all
scripts.
--
Javier
- References:
- require() relative to calling file, tobias
- Re: require() relative to calling file, Sean Conner
- Re: require() relative to calling file, Russell Haley
- Re: require() relative to calling file, Scott Morgan
- Re: require() relative to calling file, Russell Haley
- Re: require() relative to calling file, Sean Conner
- Re: require() relative to calling file, Russell Haley
- Re: require() relative to calling file, Sean Conner
- Re: require() relative to calling file, Russell Haley
- Re: require() relative to calling file, Stephen Irons