problem with lua io.lines

problem with lua io.lines

[Henning Hraban Ramm]

Hi, after a long time I'm playing with ConTeXt again…

Current beta MkIV seems to have a bug in the Lua function io.lines:

for myline in io.lines(myfile) do
  logs.report(myline)
end

"myfile" just contains one line with a number, without return/newline.
If the number has more than one digit, I get single digits as "myline".


Greetlings, Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Hans Hagen]

On 8/14/2013 4:05 PM, Henning Hraban Ramm wrote:
> Hi, after a long time I'm playing with ConTeXt again…
>
> Current beta MkIV seems to have a bug in the Lua function io.lines:
>
> for myline in io.lines(myfile) do
>    logs.report(myline)
> end
>
> "myfile" just contains one line with a number, without return/newline.
> If the number has more than one digit, I get single digits as "myline".

looks ok here, btw it's

    logs.report("some tag",myline)


>
> Greetlings, Hraban
> ---
> http://www.fiee.net/texnique/
> http://wiki.contextgarden.net
> https://www.cacert.org (I'm an assurer)
>
> ___________________________________________________________________________________
> If your question is of interest to others as well, please add an entry to the Wiki!
>
> maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
> archive  : http://foundry.supelec.fr/projects/contextrev/
> wiki     : http://contextgarden.net
> ___________________________________________________________________________________
>


-- 

-----------------------------------------------------------------
                                           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
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Wolfgang Schuster]

Am 14.08.2013 um 16:05 schrieb Henning Hraban Ramm <texml@fiee.net>:

> Hi, after a long time I'm playing with ConTeXt again…
> 
> Current beta MkIV seems to have a bug in the Lua function io.lines:
> 
> for myline in io.lines(myfile) do
>  logs.report(myline)
> end
> 
> "myfile" just contains one line with a number, without return/newline.
> If the number has more than one digit, I get single digits as "myeline".

Do you have a minimal working example?

Wolfgang
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Henning Hraban Ramm]

Am 2013-08-14 um 20:15 schrieb Hans Hagen <pragma@wxs.nl>:

> looks ok here, btw it's
> 
>   logs.report("some tag",myline)


Thanks, didn't realize since logs.reportt("everything") always worked ;-)


Greetlings, Hraban

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Henning Hraban Ramm]

Am 2013-08-14 um 20:15 schrieb Wolfgang Schuster <schuster.wolfgang@gmail.com>:

>> Current beta MkIV seems to have a bug in the Lua function io.lines:
>> 
>> for myline in io.lines(myfile) do
>> logs.report(myline)
>> end
>> 
>> "myfile" just contains one line with a number, without return/newline.
>> If the number has more than one digit, I get single digits as "myeline".
> 
> Do you have a minimal working example?

Minimal working yes, but not minimal failing ;-)

This works:

io.output(io.open("myfile.txt","w"))
io.write("123")
io.close()

for myline in io.lines("myfile.txt") do
  print(myline .. "\n")
end

But in my t-lilyfilter.tex where it reads the systems.count files of LilyPond (that contain only the number of note systems that resulted from the included LilyPond code), it fails:

 function thirddata.parselilypondfile(name)
   -- include all systems (note lines)
   -- name is like \LILYTEMP/mainfile-temp-lilypond-21.pdf
   logs.report("LILYPOND","name='" .. name .. "'")
   syco = 0
   for ts in io.lines(string.gsub(name, '%.pdf$', '-systems.count')) do
     syco = ts*1
   end
   
   for nr = 1, syco do
     logs.report("LILYPOND","including system no." .. nr)
     context("\\externalfigure[" .. string.gsub(name, '%.pdf$', '-' .. nr) .. "]")
   end
 end


While I have a single-digit number of systems, it works, but the song of my failing case has 11 lines.

I wouldn't complain if it wouldn't have worked before!


Greetlings, Hraban
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Hans Hagen]

On 8/14/2013 4:43 PM, Henning Hraban Ramm wrote:
>
> Am 2013-08-14 um 20:15 schrieb Wolfgang Schuster <schuster.wolfgang@gmail.com>:
>
>>> Current beta MkIV seems to have a bug in the Lua function io.lines:
>>>
>>> for myline in io.lines(myfile) do
>>> logs.report(myline)
>>> end
>>>
>>> "myfile" just contains one line with a number, without return/newline.
>>> If the number has more than one digit, I get single digits as "myeline".
>>
>> Do you have a minimal working example?
>
> Minimal working yes, but not minimal failing ;-)
>
> This works:
>
> io.output(io.open("myfile.txt","w"))
> io.write("123")
> io.close()
>
> for myline in io.lines("myfile.txt") do
>    print(myline .. "\n")
> end
>
> But in my t-lilyfilter.tex where it reads the systems.count files of LilyPond (that contain only the number of note systems that resulted from the included LilyPond code), it fails:
>
>   function thirddata.parselilypondfile(name)
>     -- include all systems (note lines)
>     -- name is like \LILYTEMP/mainfile-temp-lilypond-21.pdf
>     logs.report("LILYPOND","name='" .. name .. "'")
>     syco = 0
>     for ts in io.lines(string.gsub(name, '%.pdf$', '-systems.count')) do
>       syco = ts*1
>     end
>
>     for nr = 1, syco do
>       logs.report("LILYPOND","including system no." .. nr)
>       context("\\externalfigure[" .. string.gsub(name, '%.pdf$', '-' .. nr) .. "]")
>     end
>   end
>
>
> While I have a single-digit number of systems, it works, but the song of my failing case has 11 lines.
>
> I wouldn't complain if it wouldn't have worked before!

well, you probably were lucky before: string.gsub returns multiple 
values so io.lines get a second argument that limits the length of what 
gets returned

local myfile = "myfile.txt"

for myline in io.lines(myfile,2) do
     logs.report("test",myline)
end

so you need:

   io.lines((string.gsub(name, '%.pdf$', '-systems.count')))

or

   local name = string.gsub(name, '%.pdf$', '-systems.count')

   io.lines(name)


or maybe better:

   io.lines(file.replacesuffix(name,'-systems.count'))

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
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Hans Hagen]

On 8/14/2013 5:00 PM, Hans Hagen wrote:
> On 8/14/2013 4:43 PM, Henning Hraban Ramm wrote:
>>
>> Am 2013-08-14 um 20:15 schrieb Wolfgang Schuster
>> <schuster.wolfgang@gmail.com>:
>>
>>>> Current beta MkIV seems to have a bug in the Lua function io.lines:

btw, it's a lua issue, not related to luatex ...

local myfile = "myfile.txt"

for myline in io.lines(myfile) do
     logs.report("test 1",myline)
end

for myline in io.lines(myfile,3) do
     logs.report("test 2",myline)
end

for myline in io.lines(myfile,1) do
     logs.report("test 2",myline)
end

for myline in io.lines(myfile,0) do
     logs.report("test 2",myline)
end

for myline in io.lines(myfile,-1) do
     logs.report("test 2",myline)
end

the zero case loops and the last case gives a "memory allocation error: 
block too big" so these can be considered buglets in 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
-----------------------------------------------------------------
___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________

Re: problem with lua io.lines

[Henning Hraban Ramm]

Am 2013-08-14 um 21:00 schrieb Hans Hagen <pragma@wxs.nl>:

>>    for ts in io.lines(string.gsub(name, '%.pdf$', '-systems.count')) do
>>      syco = ts*1
>>    end
> 
> well, you probably were lucky before: string.gsub returns multiple values so io.lines get a second argument that limits the length of what gets returned

Thank you, didn't know that!

> local myfile = "myfile.txt"
> 
> for myline in io.lines(myfile,2) do
>    logs.report("test",myline)
> end
> 
> so you need:
> 
>  io.lines((string.gsub(name, '%.pdf$', '-systems.count')))
> 
> or
> 
>  local name = string.gsub(name, '%.pdf$', '-systems.count')
> 
>  io.lines(name)

Great, that works!

> or maybe better:
> 
>  io.lines(file.replacesuffix(name,'-systems.count'))


No, that doesn't work, because the dot stays, so I get foobar.-systems.count


Greetlings, Hraban
---
http://www.fiee.net/texnique/
http://wiki.contextgarden.net
https://www.cacert.org (I'm an assurer)

___________________________________________________________________________________
If your question is of interest to others as well, please add an entry to the Wiki!

maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage  : http://www.pragma-ade.nl / http://tex.aanhet.net
archive  : http://foundry.supelec.fr/projects/contextrev/
wiki     : http://contextgarden.net
___________________________________________________________________________________