Since OS X El Capitan, Apple introduced System Integrity Protection which restricts writing to /usr/lib /usr/bin and other sensitive directories (even to root or sudo user) that are used by the installation of Perl bundled with the Operating System. This can cause issues when it comes to installing new modules and also if trying to … Read more
Try setting PERL_MM_USE_DEFAULT like so: PERL_MM_USE_DEFAULT=1 perl -MCPAN -e ‘install My::Module’ It should make CPAN answer the default to all prompts.
Each of the standard build paradigms has their own way of specifying dependencies. In all of these cases, the build process will attempt to install your dependencies, automatically in some contexts. In ExtUtils::MakeMaker, you pass a hash reference in the PREREQ_PM field to WriteMakefile: # Makefile.PL for My::Module use ExtUtils::MakeMaker; WriteMakefile ( NAME => ‘My::Module’, … Read more
Most modules (especially ones from The CPAN) have a $VERSION variable: perl -MSome::Module -le ‘print $Some::Module::VERSION’
CPAN.pm (cpan) is the original client. It comes with Perl, so you already have it. It has the most features. It has a lot of configuration options to customize the way it works, though virtually everyone accepts the default installation. It integrates easily with local::lib. cpanminus (cpanm) is an attempt to make a zero-configuration client … Read more
bdfoy has the best large scale solution, but if you just want to install a few modules you can ask the CPAN shell to install a specific distribution by referencing a path to a tarball (relative to the top of the CPAN tree). cpan> install MSCHWERN/Test-Simple-0.62.tar.gz Throw a URL to BackPAN into your URL list … Read more
For development, I install my own Perl and leave the system Perl alone. If I want to upgrade the system Perl, I use the system package manager. For my development Perl, I use the cpan tool. Since I keep those separate, I should never mess up the Perl that the system needs for its maintenance … Read more
Please look at using the WWW::Mechanize module for this. It will fetch your web pages for you, and then give you easy-to-work with lists of URLs. my $mech = WWW::Mechanize->new(); $mech->get( $some_url ); my @links = $mech->links(); for my $link ( @links ) { printf “%s, %s\n”, $link->text, $link->url; } Pretty simple, and if you’re … Read more
JSON module works like a champ, but if you need a faster parser, use this one: JSON::XS, which requires a native compilation. Note that JSON version 2.0 and above is merely a front end for JSON::XS (if installed) or JSON::PP (fallback).
The namespace Local:: has been reserved for just this purpose. No module that starts with that prefix will be accepted to CPAN or the core. Alternatively, you can use an underscore in the top-level name (like My_Corp::Session or just My_Session). All categories with an underscore have also been reserved. (This is mentioned in perlmodlib, under … Read more