[DBD-SQLite] DBD::SQLite and CPAN SOLVED

[David Dooling]

On Fri, Jun 19, 2009 at 01:26:24PM -0500, David Dooling wrote:
> On Fri, Jun 19, 2009 at 12:20:23PM -0600, Curtis Jewell wrote:
> > On Fri, 19 Jun 2009 18:45 +0100, "Ash Berlin" <ash_cpan at firemirror.com> wrote:
> > > On 19 Jun 2009, at 18:37, David Dooling wrote:
> > > > I am trying to clean up the prerequisites for a package that requires
> > > > both DBI and DBD::SQLite (UR).  CPAN wants to order the prerequisites
> > > > in alphabetical order, so it tries to install DBD::SQLite first.  It
> > > > comes to this part of the DBD::SQLite Makefile.PL code
> > > >
> > > >  # Because DBI generates a postamble at configure-time, we need
> > > >  # the required version of DBI very early.
> > > >  my $DBI_required = 1.57;
> > > >  eval {
> > > >          require DBI;
> > > >  };
> > > >  if ( $@ or DBI->VERSION < $DBI_required ) {
> > > >          print "DBI 1.57 is required to configure this module,  
> > > > please install it or upgrade your CPAN/CPANPLUS shell\n";
> > > >          exit(0);
> > > >  }
> > > >
> > > > and fails (although the exit status is zero) because an older version
> > > > of DBI is installed.  Even though DBI later appears and as PREREQ_PM
> > > > in the WriteMakefile call, that line never gets executed, the Makefile
> > > > never gets created, and CPAN will go no further with the DBD::SQLite
> > > > install. CPAN does continue to try to install other modules,
> > > > ultimately failing the requested install because DBD::SQLite is
> > > > missing (or too old).
> 
> > > 2) Use the 'Are we running under a CPAN shell' from the (now improved)  
> > > Module::Install::AutoInstall.
> > 
> > Do this, too. It will catch what the previous one does not.
> 
> I'll try this (although I am not entirely sure if it will help; the
> docs are a little light).

This worked.  Changing from a series of requires to using -core
features allows you to specify a dependency order.

  features (
      -core => [
          'DBI'                 => '1.601',
          'DBD::SQLite'         => '1.14',
          ...
      ],
      ...
  );

Slightly more information can be found here

  http://search.cpan.org/~autrijus/ExtUtils-AutoInstall-0.63/lib/ExtUtils/AutoInstall.pm

New version has been uploaded.

  https://pause.perl.org/pub/PAUSE/authors/id/S/SA/SAKOHT/

-- 
David Dooling
http://www.politigenomics.com/