Re: How to install Perl with readline support?
On 03/12/2016 10:48 AM, Kynn Jones wrote: What happens when you run % perl -de 0 Loading DB routines from perl5db.pl version 1.44 Editor support available. Enter h or 'h h' for help, or 'man perldebug' for more help. main::(-e:1): 0 DB<1> p 1 1 DB<2> ...and then type UP-ARROW? readline history works. David $ script Script started, file is typescript dpchrist@t7400:~/sandbox/perl$ perl -de 0 Loading DB routines from perl5db.pl version 1.33 Editor support available. Enter h or `h h' for help, or `man perldebug' for more help. main::(-e:1): 0 DB<1> p 1 1 DB<2> p 1 1 DB<3> q dpchrist@t7400:~/sandbox/perl$ exit exit Script done, file is typescript 2016-03-12 10:51:40 dpchrist@t7400 ~/sandbox/perl $ dump typescript 53 63 72 69 70 74 20 73 74 61 72 74 65 64 20 6f |Script started o| 0010 6e 20 53 61 74 20 4d 61 72 20 31 32 20 31 30 3a |n Sat Mar 12 10:| 0020 35 30 3a 35 34 20 32 30 31 36 0a 64 70 63 68 72 |50:54 2016.dpchr| 0030 69 73 74 40 74 37 34 30 30 3a 7e 2f 73 61 6e 64 |ist@t7400:~/sand| 0040 62 6f 78 2f 70 65 72 6c 24 20 70 65 72 6c 20 2d |box/perl$ perl -| 0050 64 65 20 30 0d 0a 0d 0a 4c 6f 61 64 69 6e 67 20 |de 0Loading | 0060 44 42 20 72 6f 75 74 69 6e 65 73 20 66 72 6f 6d |DB routines from| 0070 20 70 65 72 6c 35 64 62 2e 70 6c 20 76 65 72 73 | perl5db.pl vers| 0080 69 6f 6e 20 31 2e 33 33 0d 0a 45 64 69 74 6f 72 |ion 1.33..Editor| 0090 20 73 75 70 70 6f 72 74 20 61 76 61 69 6c 61 62 | support availab| 00a0 6c 65 2e 0d 0a 0d 0a 45 6e 74 65 72 20 68 20 6f |le.Enter h o| 00b0 72 20 60 68 20 68 27 20 66 6f 72 20 68 65 6c 70 |r `h h' for help| 00c0 2c 20 6f 72 20 60 6d 61 6e 20 70 65 72 6c 64 65 |, or `man perlde| 00d0 62 75 67 27 20 66 6f 72 20 6d 6f 72 65 20 68 65 |bug' for more he| 00e0 6c 70 2e 0d 0a 0d 0a 6d 61 69 6e 3a 3a 28 2d 65 |lp.main::(-e| 00f0 3a 31 29 3a 09 30 0d 0a 20 20 20 20 20 20 20 20 |:1):.0.. | 0100 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 0140 20 20 20 20 20 20 20 20 08 20 20 0d 0d 20 20 1b |. .. .| 0150 5b 34 6d 44 42 3c 31 3e 1b 5b 32 34 6d 20 1b 5b |[4mDB<1>.[24m .[| 0160 31 6d 70 1b 5b 30 6d 1b 5b 31 6d 20 1b 5b 30 6d |1mp.[0m.[1m .[0m| 0170 1b 5b 31 6d 31 1b 5b 30 6d 0d 0d 0a 31 0d 0a 20 |.[1m1.[0m...1.. | 0180 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 01c0 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 08 | .| 01d0 20 20 0d 0d 20 20 1b 5b 34 6d 44 42 3c 32 3e 1b | .. .[4mDB<2>.| 01e0 5b 32 34 6d 20 1b 5b 31 6d 70 20 31 1b 5b 30 6d |[24m .[1mp 1.[0m| 01f0 0d 0d 0a 31 0d 0a 20 20 20 20 20 20 20 20 20 20 |...1.. | 0200 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 20 | | * 0240 20 20 20 20 20 20 08 20 20 0d 0d 20 20 1b 5b 34 | . .. .[4| 0250 6d 44 42 3c 33 3e 1b 5b 32 34 6d 20 1b 5b 31 6d |mDB<3>.[24m .[1m| 0260 71 1b 5b 30 6d 0d 0d 0a 64 70 63 68 72 69 73 74 |q.[0m...dpchrist| 0270 40 74 37 34 30 30 3a 7e 2f 73 61 6e 64 62 6f 78 |@t7400:~/sandbox| 0280 2f 70 65 72 6c 24 20 65 78 69 74 0d 0a 65 78 69 |/perl$ exit..exi| 0290 74 0d 0a 0a 53 63 72 69 70 74 20 64 6f 6e 65 20 |t...Script done | 02a0 6f 6e 20 53 61 74 20 4d 61 72 20 31 32 20 31 30 |on Sat Mar 12 10| 02b0 3a 35 31 3a 34 30 20 32 30 31 36 0a |:51:40 2016.| 02bc
Re: How to install Perl with readline support?
On 3/12/16, David Christensen wrote: > If I install: > > libterm-readline-perl-perl > > > And run the example again: > > $ perl readline.pl > > Enter your arithmetic expression: 1+1 > 2 > > Enter your arithmetic expression: 1+1 > 2 > > Enter your arithmetic expression: > > > History works, but there are extra blank lines between prompts and my > terminal can get stuck in bold mode depending on how I exit (?). Thanks. What happens when you run % perl -de 0 Loading DB routines from perl5db.pl version 1.44 Editor support available. Enter h or 'h h' for help, or 'man perldebug' for more help. main::(-e:1): 0 DB<1> p 1 1 DB<2> ...and then type UP-ARROW? (When I do this, I get `^[[A`, and I also have installed libterm-readline-perl-perl.) kj
Re: How to install Perl with readline support?
On 03/12/2016 09:06 AM, John L. Cunningham wrote: I have to say that I usually just install perl modules from CPAN. I have found that installing foreign software (including CPAN distributions) is a good way to destabilize Debian systems. So, I keep my most important machines "Debian clean", backup/archive religiously, and pick a specific machine (or dedicated VM) for non-Debian software experiments. David
Re: How to install Perl with readline support?
On 03/12/2016 08:54 AM, Kynn Jones wrote:
I have been searching for the answer to the subject line's question
for the last two hours.
On my Wheezy 7.9 box, Term::ReadLine is already installed.
RTFM Term::ReadLine, pasting the SYNOPSIS into a script, and running it:
$ cat readline.pl
use Term::ReadLine;
my $term = Term::ReadLine->new('Simple Perl calc');
my $prompt = "Enter your arithmetic expression: ";
my $OUT = $term->OUT || \*STDOUT;
while ( defined ($_ = $term->readline($prompt)) ) {
my $res = eval($_);
warn $@ if $@;
print $OUT $res, "\n" unless $@;
$term->addhistory($_) if /\S/;
}
$ perl readline.pl
Enter your arithmetic expression: 1+1
2
Enter your arithmetic expression: ^[[A^C
History did not work on the second prompt.
> I have [installed]
>
> libreadline-dev
> libterm-readline-gnu-perl
> libterm-readline-perl-perl
RTFM Term::ReadLine indicates that a back end is needed. Either of the
latter two you installed should be sufficient.
If I install:
libterm-readline-perl-perl
And run the example again:
$ perl readline.pl
Enter your arithmetic expression: 1+1
2
Enter your arithmetic expression: 1+1
2
Enter your arithmetic expression:
History works, but there are extra blank lines between prompts and my
terminal can get stuck in bold mode depending on how I exit (?).
David
Re: How to install Perl with readline support?
On Sat, Mar 12, 2016 at 11:54:25AM -0500, Kynn Jones wrote: > Hi everyone, > > I have been searching for the answer to the subject line's question > for the last two hours. > > None of the answers I've found work. (I.e. the `perl -de 1` REPL > remains without readline support.) I have to say that I usually just install perl modules from CPAN. It's too hard for me to match up the module that the perl error is complaining about with the correct debian package. -- John
How to install Perl with readline support?
Hi everyone, I have been searching for the answer to the subject line's question for the last two hours. None of the answers I've found work. (I.e. the `perl -de 1` REPL remains without readline support.) I have already `apt-get install`-ed libreadline-dev libterm-readline-gnu-perl libterm-readline-perl-perl (...along with their dependencies, of course). I also ran `apt-get install --reinstall perl`, and `dpkg-reconfigure`'d everything in sight. All of this got me nothing. I'm puzzled by how difficult this problem has turned out to be. Usually, `apt-cache search ...` followed by `apt-get install` takes care of stuff like this. In the harder cases, the first hit from a Google search has the answer. What makes this one so difficult? Am I missing something? TIA! kj
