#!@PERL@ -w
#
# Generates manpages from manpage.in files by substituting @...@ tags.
#

use Getopt::Std;

my (%opt,@files);
getopts( 'v', \%opt);
my $VERBOSE = defined $opt{v} ? $opt{v} : 0;

if (@ARGV)
{
  @files = @ARGV;
}
else
{
  opendir CWD, "." or die "Ooops! Can't read current dir!";
  @files = readdir CWD;
  closedir CWD;
}

my $append;
FILE:
foreach my $file (@files)
{
	print STDERR "Checking file `$file' ... " if $VERBOSE;
	$append = "discard\n";
	next unless -f $file and $file =~ /^(.*\.[1-9])\.in$/;
	my ($man) = $1;
	$man =~ s,.*/,,;
	next unless ((`file $file` =~ m/\b[ntg]roff\b/) or
		     (`file $file` =~ m/\[nt\]roff/));
	print STDERR "MATCHED\n" if $VERBOSE;
	$append = '';
	open IN, "<$file" or (warn "Can't read input file $file!" and next FILE);
	unlink $man;
	open OUT, ">$man" or (warn "Can't write output file $man!" and next FILE);
	while (<IN>)
	{
		s/@@([^@]*)@@/eval $1/ge;
		print OUT;
	}
	close IN;
}
continue
{
	print STDERR $append if $VERBOSE;
}