From: Hans Hagen <pragma@wxs.nl>
To: mailing list for ConTeXt users <ntg-context@ntg.nl>
Subject: Re: problem with lua io.lines
Date: Wed, 14 Aug 2013 17:00:56 +0200 [thread overview]
Message-ID: <520B9BA8.8080302@wxs.nl> (raw)
In-Reply-To: <FEC1F334-EA93-483F-9879-5A5E9894861E@fiee.net>
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
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next prev parent reply other threads:[~2013-08-14 15:00 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-14 14:05 Henning Hraban Ramm
2013-08-14 14:15 ` Hans Hagen
2013-08-14 14:32 ` Henning Hraban Ramm
2013-08-14 14:15 ` Wolfgang Schuster
2013-08-14 14:43 ` Henning Hraban Ramm
2013-08-14 15:00 ` Hans Hagen [this message]
2013-08-14 15:12 ` Hans Hagen
2013-08-14 17:02 ` Henning Hraban Ramm
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