problem with package.path

problem with package.path

[Peter Münster]

Hello,

I need to include lua-modules from different directories, but package.path
does not seem to work:

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

Error message:
! LuaTeX error <main ctx instance>:3: module 'mytest' not found:

TIA for any help!
Cheer, Peter

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Re: problem with package.path

[Peter Münster]

On Tue, May 04 2010, Peter Münster wrote:

> package.path = "../?.lua;;"

Ok, I see, the paths must be separated by colons:

package.path = "path1/?.lua:path2/?.lua"

But it's not very comfortable, since some of my luafiles are processed by
lua¹ *and* by context².

¹ To generate code.
² To generate documentation.


But ok, shouldn't be a too big problem... ;)

Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/


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___________________________________________________________________________________

Re: problem with package.path

[Hans Hagen]

On 4-5-2010 10:28, Peter Münster wrote:
> Hello,
>
> I need to include lua-modules from different directories, but package.path
> does not seem to work:
>
> \startbuffer[test]
> bla = nil
> \stopbuffer
> \savebuffer[test][../mytest.lua]
> \starttext
> \startluacode
> package.path = "../?.lua;;"
> require("mytest")
> \stopluacode
> \stoptext

dofile "../mytest.lua"


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
___________________________________________________________________________________
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___________________________________________________________________________________

Re: problem with package.path

[Peter Münster]

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:

\startbuffer[test]
module(...)
\stopbuffer
\savebuffer[test][../mytest.lua]
\starttext
\startluacode
package.path = "../?.lua;;"
require("mytest")
-- dofile("../mytest.lua") -- this does not work
\stopluacode
\stoptext

Cheers, Peter

-- 
Contact information: http://pmrb.free.fr/contact/


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___________________________________________________________________________________

Re: problem with package.path

[Hans Hagen]

On 7-5-2010 9:15, 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:
>
> \startbuffer[test]
> module(...)
> \stopbuffer
> \savebuffer[test][../mytest.lua]
> \starttext
> \startluacode
> package.path = "../?.lua;;"
> require("mytest")
> -- dofile("../mytest.lua") -- this does not work
> \stopluacode
> \stoptext

package.append_libpath(...)

-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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___________________________________________________________________________________

Re: problem with package.path

[Taco Hoekwater]

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).

Best wishes,
Taco
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___________________________________________________________________________________

Re: problem with package.path

[Hans Hagen]

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).

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)

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

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

in data-lua.lua

Hans


-----------------------------------------------------------------
                                           Hans Hagen | PRAGMA ADE
               Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
     tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com
                                              | www.pragma-pod.nl
-----------------------------------------------------------------
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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________

Re: problem with package.path

[Taco Hoekwater]

[-- Attachment #1: Type: text/plain, Size: 2983 bytes --]

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).
> 
> 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)
> 
> you can test this with adding an explcit ";" to
> 
>         libpaths = file.split_path(_path_,";")
> 
> in data-lua.lua

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

! LuaTeX error /opt/tex/texmf-local/tex/context/base/l-file.lua:133: bad 
argument #1 to 'gsub' (string expected, got nil)
stack traceback:
         [C]: in function 'gsub'
         /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>
         [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:

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
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



[-- Attachment #2: testmodule.lua --]
[-- Type: text/plain, Size: 32 bytes --]

module 'testmodule'

return {}


[-- Attachment #3: tryme.tex --]
[-- Type: application/x-tex, Size: 95 bytes --]

[-- Attachment #4: Type: text/plain, Size: 486 bytes --]

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maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
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___________________________________________________________________________________