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inc/Module/Install.pm  view on Meta::CPAN

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# Whether or not inc::Module::Install is actually loaded, the
# $INC{inc/Module/Install.pm} is what will still get set as long as
# the caller loaded module this in the documented manner.
# If not set, the caller may NOT have loaded the bundled version, and thus
# they may not have a MI version that works with the Makefile.PL. This would
# result in false errors or unexpected behaviour. And we don't want that.
my $file = join( '/', 'inc', split /::/, __PACKAGE__ ) . '.pm';
unless ( $INC{$file} ) { die <<"END_DIE" }
 
Please invoke ${\__PACKAGE__} with:
 
        use inc::${\__PACKAGE__};
 
not:
 
        use ${\__PACKAGE__};

inc/Module/Install.pm  view on Meta::CPAN

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# is unreliable on some platforms and requires write permissions)
# for now we should catch this and refuse to run.
if ( -f $0 ) {
        my $s = (stat($0))[9];
 
        # If the modification time is only slightly in the future,
        # sleep briefly to remove the problem.
        my $a = $s - time;
        if ( $a > 0 and $a < 5 ) { sleep 5 }
 
        # Too far in the future, throw an error.
        my $t = time;
        if ( $s > $t ) { die <<"END_DIE" }
 
Your installer $0 has a modification time in the future ($s > $t).
 
This is known to create infinite loops in make.
 
Please correct this, then run $0 again.
 
END_DIE