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#____________________________________________________________________
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# File: Architecture.pm
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#____________________________________________________________________
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#
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# Author: Shaun Ashby <Shaun.Ashby@cern.ch>
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# Update: 2003-10-23 17:20:41+0200
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# Revision: $Id: Architecture.pm,v 1.4 2005/08/05 16:44:26 sashby Exp $
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#
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# Copyright: 2003 (C) Shaun Ashby
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#
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#--------------------------------------------------------------------
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package Architecture;
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=head1 NAME
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Architecture - Utilities to determine the architecture name.
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=head1 SYNOPSIS
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if (! defined $self->{SCRAM_ARCH})
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{
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my $arch = Architecture->new();
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$self->architecture($a->arch());
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$self->system_architecture($a->system_arch_stem());
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$ENV{SCRAM_ARCH} = $self->architecture();
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}
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=head1 DESCRIPTION
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A mechanism to extract the current system architecture. The full arch
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and system (short) arch strings can be returned in the application using
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the methods in this package.
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=head1 METHODS
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=over
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=cut
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require 5.004;
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use Exporter;
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@ISA=qw(Exporter);
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@EXPORT_OK=qw( );
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=item C<new()>
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Constructor for Architecture objects.
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=cut
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sub new()
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{
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###############################################################
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# new() #
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###############################################################
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# modified : Thu Oct 23 17:21:05 2003 / SFA #
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# params : #
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# : #
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# function : #
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# : #
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###############################################################
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my $proto=shift;
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my $class=ref($proto) || $proto;
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my $self={};
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bless $self,$class;
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$self->_initarch();
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return $self;
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}
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=item C<arch()>
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Method to set or return the architecture name.
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=cut
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sub arch()
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{
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my $self=shift;
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@_ ? $self->{arch} = shift
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: $self->{arch};
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}
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=item C<system_arch_stem()>
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Method to set or return the system architecture name stem. The
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architecture stem is the full architecture without any compiler dependence.
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For example, the architecture B<slc3_ia32_gcc323> has a system architecture
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name stem of B<slc3_ia32>.
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=cut
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sub system_arch_stem()
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{
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my $self=shift;
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@_ ? $self->{archstem} = shift
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: $self->{archstem};
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}
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=item C<_initarch()>
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A subroutine to determine the architecture. This
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is done by parsing the architecture map contained as
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data inside B<SCRAM_SITE.pm> and looking for an appropriate
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match for our platform.
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=cut
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sub _initarch()
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{
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my $self=shift;
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$self->parse_architecture_map();
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return $self;
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}
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=item C<parse_architecture_map()>
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Read the architecture map file defined in the site package B<SCRAM_SITE.pm>.
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=cut
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sub parse_architecture_map()
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{
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my $self=shift;
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my $matches={};
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require Installation::SCRAM_SITE;
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my $architectures = &Installation::SCRAM_SITE::read_architecture_map();
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while (my ($archstring,$archtest) = each %{$architectures})
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{
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my $rval = eval join(" ",@$archtest);
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if ($rval)
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{
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# Store the matched string:
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$matches->{$archstring}=1;
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if ((my $nkeys = keys %{$matches}) > 1)
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{
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print "\n";
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print "SCRAM: WARNING: more than one architecture definition in ","\n";
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print " SCRAM_SITE matches current platform!","\n";
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print "Unable to set the architecture correctly!","\n";
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print "\n";
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exit(1);
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}
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# Store the match (only the *first* match in the case
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# of multiple matches):
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$self->arch($archstring);
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# Also take the arch stem from the arch string. E.g. for a string
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# "slc3_ia32_xxx", keep the "slc3_ia32" part:
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if (my ($sysname,$cpuarch) = ($archstring =~ /(.*?)\_(.*?)\_.*?$/))
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{
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my $stem = $sysname."_".$cpuarch;
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$self->system_arch_stem($stem);
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}
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else
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{
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# Just set the stem to be the same as the main arch string:
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$self->system_arch_stem($archstring);
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}
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}
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else
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{
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next;
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}
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}
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}
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1;
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__END__
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=back
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=head1 AUTHOR/MAINTAINER
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Shaun Ashby
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=cut
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