How can I create an RPM from a module and recursively create separate independent RPMs for the dependencies?

Question

Given a module how can I create an rpm of not just the module, but all the module's dependencies?

Start by creating a test module

$ module-starter --author "Evan Carroll" --email "[email protected]" --module Foo::Bar
Added to MANIFEST: Changes
Added to MANIFEST: ignore.txt
Added to MANIFEST: lib/Foo/Bar.pm
Added to MANIFEST: Makefile.PL
Added to MANIFEST: MANIFEST
Added to MANIFEST: README
Added to MANIFEST: t/00-load.t
Added to MANIFEST: t/manifest.t
Added to MANIFEST: t/pod-coverage.t
Added to MANIFEST: t/pod.t
Added to MANIFEST: xt/boilerplate.t
Created starter directories and files

Now I edit the Makefile.pl, and add Mojolicious as a prereq.

...
PREREQ_PM => {                                                         
      'Mojolicious' => '0'
....

Now I can run

perl Makefile.PL
make dist

But running,

$ sudo cpantorpm -y /tmp/yum /tmp/Foo-Bar/Foo-Bar-0.01.tar.gz 

I get this,

error: Failed build dependencies:
        perl >= 5.006 is needed by perl-Foo-Bar-0.01-1.noarch
        perl(ExtUtils::MakeMaker) is needed by perl-Foo-Bar-0.01-1.noarch
        perl(Mojolicious) is needed by perl-Foo-Bar-0.01-1.noarch

That makes sense, but I want it to create RPMs for these requirements. I would like Foo::Bar to require an rpm that is also generated from cpan that represents Mojolicious, and for a build system to output two RPMs (one rpm for Foo::Bar which requires the also-provided Mojolicious RPM).

Answer 1

That would be way too easy to get around the dependecy hell. I would go for some project like cpan-dependecy . Somebody already did the work for you.

Here is how it works:

1) How to install Following CPAN modules are required.

• CPANPLUS
• RPM::Specfile

2) How to use To create a rpm of Linux::Smaps bin/cpan-dependency.pl --conf=config/conf.yml Linux::Smaps

3) conf.yml

• filter_requires .. Remove specified requires from the package.
• build_skip .. Skip to build the package.
• build_requires .. Build&Install specified packages before building the package.
• requires .. Add specified packages to the package's dependency.

You need to adjust conf.yml to satisfy your dependecies.

To build your project you would do the following:

bin/cpan-dependency.pl --conf=config/conf.yml Foo::Bar