Re: [NTG-context] problem with package.path

[Taco Hoekwater]

Hans Hagen wrote:

On 7-5-2010 10:52, Taco Hoekwater wrote:

Peter Münster wrote:

On Thu, May 06 2010, Hans Hagen wrote:

\startbuffer[test]
bla = nil
\stopbuffer
\savebuffer[test][../mytest.lua]
\starttext
\startluacode
package.path = "../?.lua;;"
require("mytest")
\stopluacode
\stoptext

dofile "../mytest.lua"

Bad example...

mytest.lua is a module, so it must be loaded with require:

You cannot always replace 'require' with 'dofile', and for
this reason it is important that package.path actually works
as explained in the lua manual. (escrito had similar problems,
and other external lua modules will run into it as well).

you can test this with adding an explcit ";" to

        libpaths = file.split_path(_path_,";")

in data-lua.lua

well, package path is supported (as is cpath) so it's more a question of why that paths fails .. maybe we need to explicitly assume ";" instead of the platform separator (tests on my machine work ok as windows has ; as separator)

For me on linux, this change should make it work (package.path indeed
contains semicolons). However, require() is still broken:


stack traceback:
        [C]: in function 'gsub'

        [C]: in function 'require'
        <main ctx instance>:2: in main chunk.
}inserted text> ...equire('testmodule') -- fails

\dodostartluacode ...d \directlua \zerocount {#1}}

l.5 \stopluacode


Test files are attached. The definition of package.libpaths I used:

  function package.libpaths()
    print (_path_, package.path)
    if not _path_ or package.path ~= _path_ then
        _path_ = package.path
        libpaths = file.split_path(_path_,';')
        print (table.serialize(libpaths))
    end
    return libpaths
  end

And it prints out:


t={
 "./?.lua",
 "/usr/local/share/lua/5.1/?.lua",
 "/usr/local/share/lua/5.1/?/init.lua",
 "/usr/local/lib/lua/5.1/?.lua",
 "/usr/local/lib/lua/5.1/?/init.lua",
}

But it looks like mkiv is not happy with the split path, as it goes
on trying clibpaths().


Also, I ran into another problem: if the module has the same name as the
base input file, package.libpaths is not called at all (initially the
module was called 'tryme.lua').

Best wishes,
Taco



module 'testmodule'

return {}

! LuaTeX error /opt/tex/texmf-local/tex/context/base/l-file.lua:133: bad argument #1 to 'gsub' (string expected, got nil) /opt/tex/texmf-local/tex/context/base/l-file.lua:133: in function 'split_path' /opt/tex/texmf-local/tex/context/base/data-lua.lua:36: in function 'clibpaths' /opt/tex/texmf-local/tex/context/base/data-lua.lua:97: in function </opt/tex/texmf-local/tex/context/base/data-lua.lua:79> nil ./?.lua;/usr/local/share/lua/5.1/?.lua;/usr/local/share/lua/5.1/?/init.lua;/usr/local/lib/lua/5.1/?.lua;/usr/local/lib/lua/5.1/?/init.lua

tryme.tex
Description: TeX document

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