File Coverage

blib/lib/Siebel/AssertOS/Linux/Distribution.pm

Criterion	Covered	Total	%
statement	6	65	9.2
branch	0	30	0.0
condition	0	20	0.0
subroutine	2	7	28.5
pod	0	3	0.0
total	8	125	6.4

package Siebel::AssertOS::Linux::Distribution;

use strict;
use warnings;
require Exporter;

our $VERSION = '0.9'; # VERSION
our @ISA                     = qw(Exporter);
our @EXPORT_OK               = qw( distribution_name distribution_version );
our $release_files_directory = '/etc';
our $standard_release_file   = 'lsb-release';
our %release_files           = (
    'gentoo-release'        => 'gentoo',
    'fedora-release'        => 'fedora',
    'centos-release'        => 'centos',
    'enterprise-release'    => 'oracle enterprise linux',
    'turbolinux-release'    => 'turbolinux',
    'mandrake-release'      => 'mandrake',
    'mandrakelinux-release' => 'mandrakelinux',
    'debian_version'        => 'debian',
    'debian_release'        => 'debian',
    'SuSE-release'          => 'suse',
    'knoppix-version'       => 'knoppix',
    'yellowdog-release'     => 'yellowdog',
    'slackware-version'     => 'slackware',
    'slackware-release'     => 'slackware',
    'redflag-release'       => 'redflag',
    'redhat-release'        => 'redhat',
    'redhat_version'        => 'redhat',
    'conectiva-release'     => 'conectiva',
    'immunix-release'       => 'immunix',
    'tinysofa-release'      => 'tinysofa',
    'trustix-release'       => 'trustix',
    'adamantix_version'     => 'adamantix',
    'yoper-release'         => 'yoper',
    'arch-release'          => 'arch',
    'libranet_version'      => 'libranet',
    'va-release'            => 'va-linux',
    'pardus-release'        => 'pardus',
    'system-release'        => 'amazon',
);
our %version_match = (
    'gentoo'  => 'Gentoo Base System release (.*)',
    'debian'  => '(.+)',
    'suse'    => 'VERSION = (.*)',
    'fedora'  => 'Fedora(?: Core)? release (\d+) \(',
    'redflag' => 'Red Flag (?:Desktop|Linux) (?:release |\()(.*?)(?: \(.+)?\)',
    'redhat'  => 'Red Hat(?: Enterprise)? Linux(?: Server)? release (.*) \(',
    'oracle enterprise linux' => 'Enterprise Linux Server release (.+) \(',
    'slackware'               => '^Slackware (.+)$',
    'pardus'                  => '^Pardus (.+)$',
    'centos'                  => '^CentOS(?: Linux)? release (.+) \(',
    'scientific'              => '^Scientific Linux release (.+) \(',
    'amazon'                  => 'Amazon Linux AMI release (.+)$',
);

 # :TODO:29/07/2017 13:49:50:ARFREITAS: create a separated module to hold this object
 # to facilitate unit testing
sub new {
    my %self = (
        'DISTRIB_ID'          => '',
        'DISTRIB_RELEASE'     => '',
        'DISTRIB_CODENAME'    => '',
        'DISTRIB_DESCRIPTION' => '',
        'release_file'        => '',
        'pattern'             => ''
    );

    return bless \%self;
}

sub distribution_name {
    my $self = shift || new();
    my $distro;

    if ( $distro = $self->_get_lsb_info() ) {
        return $distro if ($distro);
    }

    foreach (qw(enterprise-release fedora-release)) {

        if ( -f "$release_files_directory/$_"
            && !-l "$release_files_directory/$_" )
        {

            if ( -f "$release_files_directory/$_"
                && !-l "$release_files_directory/$_" )
            {
                $self->{'DISTRIB_ID'}   = $release_files{$_};
                $self->{'release_file'} = $_;
                return $self->{'DISTRIB_ID'};
            }

        }
    }

    foreach ( keys %release_files ) {

        if ( -f "$release_files_directory/$_"
            && !-l "$release_files_directory/$_" )
        {

            if ( -f "$release_files_directory/$_"
                && !-l "$release_files_directory/$_" )
            {

                if ( $release_files{$_} eq 'redhat' ) {

                    foreach my $rhel_deriv ( 'centos', 'scientific', ) {
                        $self->{'pattern'}      = $version_match{$rhel_deriv};
                        $self->{'release_file'} = 'redhat-release';

                        if ( $self->_get_file_info() ) {
                            $self->{'DISTRIB_ID'}   = $rhel_deriv;
                            $self->{'release_file'} = $_;
                            return $self->{'DISTRIB_ID'};
                        }

                    }

                    $self->{'pattern'} = '';
                }

                $self->{'release_file'} = $_;
                $self->{'DISTRIB_ID'}   = $release_files{$_};
                return $self->{'DISTRIB_ID'};
            }
        }
    }
    undef;
}

sub distribution_version {
    my $self = shift || new();
    my $release;
    return $release if ( $release = $self->_get_lsb_info('DISTRIB_RELEASE') );

    if ( !$self->{'DISTRIB_ID'} ) {
        $self->distribution_name() or die 'No version because no distro.';
    }

    $self->{'pattern'}         = $version_match{ $self->{'DISTRIB_ID'} };
    $release                   = $self->_get_file_info();
    $self->{'DISTRIB_RELEASE'} = $release;
    return $release;
}

sub _get_lsb_info {
    my $self  = shift;
    my $field = shift || 'DISTRIB_ID';
    my $tmp   = $self->{'release_file'};

    if ( -r "$release_files_directory/" . $standard_release_file ) {
        $self->{'release_file'} = $standard_release_file;
        $self->{'pattern'}      = $field . '=(.+)';
        my $info = $self->_get_file_info();
        if ($info) {
            $self->{$field} = $info;
            return $info;
        }
    }

    $self->{'release_file'} = $tmp;
    $self->{'pattern'}      = '';
    undef;
}

sub _get_file_info {
    my $self = shift;
    open my $fh, '<', "$release_files_directory/" . $self->{'release_file'}
      or die 'Cannot open file: '
      . $release_files_directory . '/'
      . $self->{'release_file'};
    my $info = '';
    local $_;
    while (<$fh>) {
        chomp $_;
        ($info) = $_ =~ m/$self->{'pattern'}/;
        return "\L$info" if $info;
    }
    undef;
}

1;

__END__