CODEWITHSUNDEEP
perldebuggingcpanarrow-keysperl5.12
agaved
agaved

Reputation: 278

Arrow up and down does not work any more in Perl debugger and CPAN client

I used to use Active Perl on my Mac OS X (v 10.7.5) and then I switched to the one provided via mac ports (v 5.12.4).

Now when I run the CPAN client or the perl debugger, I cannot access the history using ArrowUp and ArrowDown, what is shown at the prompt is ^[[A and ^[[B respectively.

At least on the debugger the history works, I can access past commands via !num.

Upvotes: 18

Views: 6303

Answers (7)

Randall
Randall

Reputation: 3044

If you want to avoid installing additional OS libraries (or need to because you don't have root/sudo) you can just use CPAN (as opposed to doing a system install with rpm or apt) to grab one of these two Perl implementations of Readline:

It's especially handy if you already have your own local Perl install (eg, using Perlbrew) where it won't want to use any system-installed modules.

Upvotes: 4

Fazley
Fazley

Reputation: 489

This is what helped me on Debian stretch

apt install libterm-readline-gnu-perl

Upvotes: 3

Dirk Heumann
Dirk Heumann

Reputation: 31

For "git for Windows" you can do the following:

From

Ilya Zakharevich's package Term-ReadLine-Perl-1.0303

download the file

Term-ReadLine-Perl-1.0303.tar.gz

extract it with

tar xvzf ../Term-ReadLine-Perl-1.0303.tar.gz

Two files

Term-ReadLine-Perl-1.0303/ReadLine/Perl.pm
Term-ReadLine-Perl-1.0303/ReadLine/readline.pm

have to be copied typically with admin rights into the directory

C:/Program Files/Git/usr/share/perl5/site_perl/Term/ReadLine/

resulting in the two files

C:/Program Files/Git/usr/share/perl5/site_perl/Term/ReadLine/Perl.pm and
C:/Program Files/Git/usr/share/perl5/site_perl/Term/ReadLine/readline.pm

Afterwards you can use the cursor keys inside the perl debugger, for instance inside a "perl -de 0" session.

In the 64 bit git for Windows SDK, you usually have to copy the two files into directory

C:/git-sdk-64/usr/share/perl5/site_perl/Term/ReadLine

Upvotes: 1

talkloud
talkloud

Reputation: 101

Here's what I had to do to get it working with Cygwin Perl

Install the following Cygwin packages:

libncurses-devel
libreadline-devel

Then install the Term::ReadLine::Gnu module from CPAN

Upvotes: 0

ozcoder
ozcoder

Reputation: 41

Following on from the answers from LeoNerd and Hakon :- On CentOS 7 I had to run

sudo yum install perl-Term-ReadLine-Gnu

to install the module. Now the arrow keys work in perl -d

Upvotes: 3

civelldr
civelldr

Reputation: 1

What I ended up doing was changing the term of my 'Terminal' window to vt100 under the Preferences > Advanced

Upvotes: 0

LeoNerd
LeoNerd

Reputation: 8542

By default the only Term::ReadLine handler you get is Term::ReadLine::Perl which is quite simple and doesn't understand things like arrow keys. You probably want to install Term::ReadLine::Gnu.

Upvotes: 42

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