TODO

# This option sanity-checking causes me too much pain with .ackrc files,
# but I don't want to throw away what I have.
#
# Some day I want to add it back.

=head2 options_sanity_check( %opts )

Checks for sane command-line options.  For example, I<-l> doesn't
make sense with I<-C>.

=cut

sub options_sanity_check {
    my %opts = @_;
    my $ok = 1;

    # List mode doesn't make sense with any of these
    $ok = 0 if _option_conflict( \%opts, 'l', [qw( f g group o output passthru )] );

    # Passthru negates the need for a lot of switches
    $ok = 0 if _option_conflict( \%opts, 'passthru', [qw( f g group l )] );

    # File-searching is definitely irrelevant on these
    for my $switch ( qw( f g l ) ) {
        $ok = 0 if _option_conflict( \%opts, $switch, [qw( A B C o group )] );
    }

    # No sense to have negation with -o or --output
    for my $switch ( qw( v ) ) {
        $ok = 0 if _option_conflict( \%opts, $switch, [qw( o output passthru )] );
    }

    return $ok;
}

sub _option_conflict {
    my $opts = shift;
    my $used = shift;
    my $exclusives = shift;

    return if not defined $opts->{$used};

    my $bad = 0;
    for my $opt ( @{$exclusives} ) {
        if ( defined $opts->{$opt} ) {
            print 'The ', _opty($opt), ' option cannot be used with the ', _opty($used), " option.\n";
            $bad = 1;
        }
    }

    return $bad;
}

sub _opty {
    my $opt = shift;
    return length($opt)>1 ? "--$opt" : "-$opt";
}