2011-09-16T06:36:02+01:00

02packages.dependencies.txt.gz && apt-cpan

My goal was to have a single command to use to install Perl modules that will prefer distribution packages over installing from CPAN.

Combining 02packages.details.txt.gz with data from MetaCPAN::API I've generated 02packages.dependencies.txt.gz. This file has similar structure, basically it is a list of module names with all the dependencies it has. Here are example lines:

DBI     1.616   Clone/0.31 DBD::AnyData/0.09 DBD::CSV/0.29 DBD::PO/2.10 DBD::RAM/0.072 DB_File ExtUtils::MakeMaker ExtUtils::MakeMaker/6.48 MLDBM Net::Daemon RPC::PlServer/0.2001 SQL::Statement/1.27 SQL::Statement/1.28 Test::Simple/0.90 perl/5.008
Moose   2.0205  Algorithm::C3 DBM::Deep Data::OptList/0.107 Data::Visitor DateTime DateTime::Calendar::Mayan DateTime::Format::MySQL Declare::Constraints::Simple Devel::GlobalDestruction Devel::PartialDump/0.14 Dist::CheckConflicts/0.02 Eval::Closure/0.04 ExtUtils::MakeMaker/6.30 File::Find::Rule HTTP::Headers IO::File IO::String List::MoreUtils/0.28 Locale::US MRO::Compat/0.05 Module::Info Module::Refresh Package::DeprecationManager/0.11 Package::Stash/0.21 Package::Stash::XS/0.18 PadWalker Params::Coerce Params::Util/1.00 Regexp::Common Scalar::Util/1.19 Sub::Exporter/0.980 Sub::Name/0.05 Task::Weaken Test::Deep Test::DependentModules/0.09 Test::Fatal/0.001 Test::Inline Test::LeakTrace Test::More/0.88 Test::Output Test::Requires/0.05 Try::Tiny/0.02 URI perl/v5.8.3
MetaCPAN::API   0.33    Any::Moose Carp ExtUtils::MakeMaker/6.30 File::Find File::Temp HTTP::Tiny JSON Module::Build/0.3601 Test::Fatal Test::More Test::TinyMocker Try::Tiny URI::Escape
Pod::POM::Web   1.17    Alien::GvaScript/1.021 AnnoCPAN::Perldoc::Filter Config Encode::Guess HTTP::Daemon List::MoreUtils List::Util MIME::Types Module::Build/0.38 Module::CoreList POSIX PPI::HTML Pod::POM/0.25 Pod::POM::View::HTML Search::Indexer/0.75 Test::More Time::HiRes URI URI::QueryParam
Pod::POM::Web::Indexer  0       Alien::GvaScript/1.021 AnnoCPAN::Perldoc::Filter Config Encode::Guess HTTP::Daemon List::MoreUtils List::Util MIME::Types Module::Build/0.38 Module::CoreList POSIX PPI::HTML Pod::POM/0.25 Pod::POM::View::HTML Search::Indexer/0.75 Test::More Time::HiRes URI URI::QueryParam
Pod::POM::Web::PSGI     0.002   CGI::Emulate::PSGI/0.12 ExtUtils::MakeMaker/6.30 Pod::POM::Web/1.17

So basically it's possible to download this file and find out offline the dependency chain of a module.

Which I did in apt-cpan. With help of Debian::Apt::PM if is possible to preferably install packages from Debian distribution repositories and only the missing modules via CPAN shell.

Here is an example:

$ apt-cpan -n install Nagios::Plugin::OverHTTP
sudo apt-get install libdata-validate-domain-perl libdata-validate-uri-perl libenv-path-perl libhtml-strip-perl libmoosex-clone-perl
sudo cpan -i Nagios::Plugin::OverHTTP Const::Fast

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