view release on metacpan or  search on metacpan

private/MakeUtil.pm  view on Meta::CPAN

          };
    }

    if ($downgrade || $do_downgrade) {
        $our_sub = sub {
	    if ( /^(\s*)our\s+\(\s*([^)]+\s*)\)/ ) {
                my $indent = $1;
                my $vars = join ' ', split /\s*,\s*/, $2;
                $_ = "${indent}use vars qw($vars);\n";
            }
	    elsif ( /^(\s*)((use|no)\s+(bytes|utf8)\s*;.*)$/)
            {
                $_ = "$1# $2\n";
            }
          };
    }
    #elsif ($] >= 5.006000 || $upgrade) {
    elsif ($upgrade) {
        $our_sub = sub {
	    if ( /^(\s*)use\s+vars\s+qw\((.*?)\)/ ) {
                my $indent = $1;
                my $vars = join ', ', split ' ', $2;
                $_ = "${indent}our ($vars);\n";
            }
	    elsif ( /^(\s*)#\s*((use|no)\s+(bytes|utf8)\s*;.*)$/)
            {
                $_ = "$1$2\n";
            }
          };
    }

    if (! $our_sub && ! $warn_sub) {
        warn "Up/Downgrade not needed.\n";
	if ($upgrade || $downgrade)
          { exit 0 }
        else
          { return }
    }

    foreach (@files) {
        #if (-l $_ )
          { doUpDown($our_sub, $warn_sub, $_) }
          #else
          #{ doUpDownViaCopy($our_sub, $warn_sub, $_) }
    }

    warn "Up/Downgrade complete.\n" ;
    exit 0 if $upgrade || $downgrade;

}


sub doUpDown
{
    my $our_sub = shift;
    my $warn_sub = shift;

    return if -d $_[0];

    local ($^I) = ($^O eq 'VMS') ? "_bak" : ".bak";
    local (@ARGV) = shift;

    while (<>)
    {
        print, last if /^__(END|DATA)__/ ;

        &{ $our_sub }() if $our_sub ;
        &{ $warn_sub }() if $warn_sub ;
        print ;
    }

    return if eof ;

    while (<>)
      { print }
}

sub doUpDownViaCopy
{
    my $our_sub = shift;
    my $warn_sub = shift;
    my $file     = shift ;

    use File::Copy ;

    return if -d $file ;

    my $backup = $file . ($^O eq 'VMS') ? "_bak" : ".bak";

    copy($file, $backup)
        or die "Cannot copy $file to $backup: $!";

    my @keep = ();

    {
        open F, "<$file"
            or die "Cannot open $file: $!\n" ;
        while (<F>)
        {
            if (/^__(END|DATA)__/)
            {
                push @keep, $_;
                last ;
            }

            &{ $our_sub }() if $our_sub ;
            &{ $warn_sub }() if $warn_sub ;
            push @keep, $_;
        }

        if (! eof F)
        {
            while (<F>)
              { push @keep, $_ }
        }
        close F;
    }

    {
        open F, ">$file"
            or die "Cannot open $file: $!\n";