Hi Ed,
Maybe I didn't explain the issue, maybe I don't quite understand
it. And maybe I didn't quite understand your answer:
1. I made a new account in my laptop
2. I installed perlbrew
3. I installed perl-5.40.1
4. In installed cpanm
5. I installed PDL with cpanm
6. I ran pdl
7. I obtained the answer:
perlDL shell v1.357
PDL comes with ABSOLUTELY NO WARRANTY. For details, see the file
'COPYING' in the PDL distribution. This is free software and you
are welcome to redistribute it under certain conditions, see
the same file for details.
ReadLines, NiceSlice, MultiLines enabled
Reading PDL/default.perldlrc...
* WARNING: Error loading PDL: 'Can't locate Term/ReadKey.pm in
@INC (you may need to install the Term::ReadKey module) (@INC
entries checked:
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1 /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/5.40.1/x86_64-linux /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/5.40.1) at /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/Doc/Perldl.pm
line
52.
BEGIN failed--compilation aborted at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/Doc/Perldl.pm
line
52.
Compilation failed in require at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/default.perldlrc
line
37.
BEGIN failed--compilation aborted at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/default.perldlrc
line
37.
Compilation failed in require at (eval 13) line 1.
' - trying blib.
WARNING: PDL startup not found only plain perl available
Note: AutoLoader not enabled ('use PDL::AutoLoader' recommended)
** perl>
The line marked with an * above says: 'WARNING: Error loading PDL:
'Can't locate Term/ReadKey.pm in @INC (you may need to install the
Term::ReadKey module)...'
So it is not that I (or my students) care about Term::ReadKey, it is
that the advice we got is that we'd better install it.
Also, the line marked with ** shows we obtained the prompt 'perl>'
instead of the expected prompt 'pdl>'.
In my previous installations, I hadn't had this problem, as I
installed manually many required and optional pre-requisites,
including Term::ReadLine::Gnu, which I guess is the readline you
mention in your answer. However, installing Term::Readline::Gnu didn't
help with the problem above. I obtained again:
$ pdl
perlDL shell v1.357
PDL comes with ABSOLUTELY NO WARRANTY. For details, see the file
'COPYING' in the PDL distribution. This is free software and you
are welcome to redistribute it under certain conditions, see
the same file for details.
ReadLines, NiceSlice, MultiLines enabled
Reading PDL/default.perldlrc...
WARNING: Error loading PDL: 'Can't locate Term/ReadKey.pm in
@INC (you may need to install the Term::ReadKey module) (@INC
entries checked:
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1 /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/5.40.1/x86_64-linux /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/5.40.1) at /home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/Doc/Perldl.pm
line
52.
BEGIN failed--compilation aborted at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/Doc/Perldl.pm
line
52.
Compilation failed in require at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/default.perldlrc
line
37.
BEGIN failed--compilation aborted at
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/default.perldlrc
line
37.
Compilation failed in require at (eval 11) line 1.
' - trying blib.
WARNING: PDL startup not found only plain perl available
Note: AutoLoader not enabled ('use PDL::AutoLoader' recommended)
perl>
But after installing ReadKey things started behaving as usual:
$ cpanm Term::ReadKey
--> Working on Term::ReadKey
Fetching
http://www.cpan.org/authors/id/J/JS/JSTOWE/TermReadKey-2.38.tar.gz
... OK
Configuring TermReadKey-2.38 ... OK
Building and testing TermReadKey-2.38 ... OK
Successfully installed TermReadKey-2.38
1 distribution installed
$ pdl
perlDL shell v1.357
PDL comes with ABSOLUTELY NO WARRANTY. For details, see the file
'COPYING' in the PDL distribution. This is free software and you
are welcome to redistribute it under certain conditions, see
the same file for details.
ReadLines, NiceSlice, MultiLines enabled
Reading PDL/default.perldlrc...
Found docs database
/home/mochan2/perl5/perlbrew/perls/perl-5.40.1/lib/site_perl/5.40.1/x86_64-linux/PDL/pdldoc.db
Type 'help' for online help
Type 'demo' for online demos
Loaded PDL v2.098 (supports bad values)
Note: AutoLoader not enabled ('use PDL::AutoLoader' recommended)
pdl>
So, what is the user expected to do? The installation of PDL was declared
succesful, a program ('pdl') distributed with PDL was installed, the
program didn't run smoothly and sent error messages asking the user to
install another package: Term::ReadKey. How would you interpret this
situation as a new user? Wouldn't you be confused? Wouldn't you
conclude there is something wrong?
I don't know what is the correct solution. I suggested adding
Term::ReadKey to the required packages, so it would be installed
automatically. Maybe that is not the correct solution, but then, I
don't know, what would be the correct solution?
Best regards,
Luis
On Tue, Jan 21, 2025 at 10:40:32PM +0000, Ed . wrote:
Hi Luis,
PDL isn't just an interactive environment. "Required" would be
wrong. I use the interactive part very heavily (which isn't very
surprising), and wouldn't want to use it without readline (which I
have faced when debugging in a qemu environment on a weird
architecture). I am not going to make any of the Term::* be
"required" for PDL. I hope you understand.
If it helps, the REPL script was installed, but not all of the
components. It does sound like you're asking me to make a separate
PDL::REPL repo where that stuff would live, but I don't want to do
that.
Best regards,
Ed
________________________________
From: Luis Mochan <moc...@icf.unam.mx>
Sent: 21 January 2025 20:07
To: Ed . <ej...@hotmail.com>
Cc: perldl <pdl-gene...@lists.sourceforge.net>; perldl
<pdl-devel@lists.sourceforge.net>
Subject: Re: [Pdl-devel] pdl scripts
Hi Ed,
On Tue, Jan 21, 2025 at 05:13:09PM +0000, Ed . wrote:
> Hi Luis,
>
> That's a really good question!
>
> PDL's "requirements" (when you say e.g. cpanm PDL) are hard
requirements for PDL to run: largely File::Map and File::Which.
CPAN has a mechanism to "recommend" other modules, including
Term::ReadKey. It has done so for a long time. cpanm can be told to
install recommended modules.
The doubt I have now is, should Term::ReadKey be recommended or should
it be required? The problem is that the repl's were installed, but
they didn't work without it.
> The demos will be sparse...
Ok, thanks. I'll pass that info to the students.
Regards,
Luis
--
o
W. Luis Mochán, | tel:(52)(777)329-1734 /<(*)
Instituto de Ciencias Físicas, UNAM | fax:(52)(777)317-5388 `>/ /\
Av. Universidad s/n CP 62210 | (*)/\/ \
Cuernavaca, Morelos, México | moc...@fis.unam.mx /\_/\__/
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