A bootstrapping process is used to resolve this issue. First, the perl-Moose package is built with the %perl_bootstrap rpm macro set to 1. This could be set in the build system, or by editing the perl-Moose spec file to set it (which is what's done in EPEL). This allows perl-Moose to be built without perl-Data-Visitor or any other module that would result in circular build dependencies.

On 2017-09-28 05:04 AM, Paul Howarth wrote: > On 2017-09-28 08:42, Digimer wrote: >> Hi all, >> >>   This is my first post, apologies if I am off-topic; >> >>   I'm trying to build perl-Moose, which depends on perl-Data-Visitor, >> but perl-Data-Visitor depends on perl-Moose; >> >> ==== >> [digimer@el7-builder-test1 SPECS]$ rpmbuild -ba perl-Moose.spec >> error: Failed build dependencies: >>     perl(Data::Visitor) is needed by >> perl-Moose-2.1005-1.el7.centos.x86_64 >> [digimer@el7-builder-test1 SPECS]$ rpmbuild -ba perl-Data-Visitor.spec >> error: Failed build dependencies: >>     perl(Moose) >= 0.89 is needed by >> perl-Data-Visitor-0.30-1.el7.centos.noarch >> ==== >> >>   I am wondering how EPEL repos solved this problem... I grabbed the >> source for both from EPEL. Now, I know I could install perl-Data-Visitor >> from EPEL, then build perl-Moose, install that, then rebuild >> perl-Data-Visitor but I am trying to learn more about package >> management, which is why I am asking here to find out what is the proper >> way to solve this. > > A bootstrapping process is used to resolve this issue. > > First, the perl-Moose package is built with the %perl_bootstrap rpm > macro set to 1. This could be set in the build system, or by editing the > perl-Moose spec file to set it (which is what's done in EPEL). This > allows perl-Moose to be built without perl-Data-Visitor or any other > module that would result in circular build dependencies. > > Once perl-Moose has been built, the %perl_bootstrap rpm macro can be > removed, either from the build system or the spec file as necessary. > > It's then possible to build perl-Data-Visitor etc. > > Finally, perl-Moose is rebuilt without %perl_bootstrap, which improves > test coverage by pulling in all of the build requirements that were > omitted for the bootstrap build. > > You can see the bootstrapping process by looking at the commit history > for the epel7 branch: > https://src.fedoraproject.org/rpms/perl-Moose/commits/epel7 > > Paul. Excellent, thanks! Can I ask another question? (Ya, I'm new...), is there a doc you recommend on using macros? I assume you mean the .spec option is to comment out the requires line for perl-Data-Visitor?