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# then these are treated as additional names which are required by the
# file and are printed as well.

# I plan to rewrite this in C so that perl is not required by RPM at
# build time.

# by Ken Estes Mail.com kestes@staff.mail.com

if ("@ARGV") {
  foreach (@ARGV) {
    process_file($_);
  }
} else {
  
  # notice we are passed a list of filenames NOT as common in unix the
  # contents of the file.
  
  foreach (<>) {
    process_file($_);
  }
}


foreach $module (sort keys %require) {
  if (length($require{$module}) == 0) {
    print "perl($module)\n";
  } else {

    # I am not using rpm3.0 so I do not want spaces around my
    # operators. Also I will need to change the processing of the
    # $RPM_* variable when I upgrade.

    print "perl($module) >= $require{$module}\n";
  }
}

exit 0;



sub process_file {
  
  my ($file) = @_;
  chomp $file;
  
  open(FILE, "<$file") || return;
  
  while (<FILE>) {
    
    # skip the "= <<" block

    if ( ( m/^\s*\$(.*)\s*=\s*<<\s*["'](.*)['"]/) ||
         ( m/^\s*\$(.*)\s*=\s*<<\s*(.*);/) ) {
      $tag = $2;
      while (<FILE>) {
        ( $_ =~ /^$tag/) && last;
      }
    }

    # skip q{} quoted sections - just hope we don't have curly brackets
    # within the quote, nor an escaped hash mark that isn't a comment
    # marker, such as occurs right here. Draw the line somewhere.
    if ( m/^.*\Wq[qxwr]?\s*([\{\(\[#|\/])[^})\]#|\/]*$/ && ! m/^\s*(require|use)\s/ ) {
      $tag = $1;
      $tag =~ tr/{\(\[\#|\//})]#|\//;
      while (<FILE>) {
        ( $_ =~ m/\}/ ) && last;
      }
    }

    # skip the documentation

    # we should not need to have item in this if statement (it
    # properly belongs in the over/back section) but people do not
    # read the perldoc.

    if ( (m/^=(head[1-4]|pod|item)/) .. (m/^=(cut)/) ) {
      next;
    }

    if ( (m/^=(over)/) .. (m/^=(back)/) ) {
      next;
    }
    
    # skip the data section
    if (m/^__(DATA|END)__$/) {
      last;
    }

    # Each keyword can appear multiple times.  Don't
    #  bother with datastructures to store these strings,
    #  if we need to print it print it now.
    #
	# Again allow for "our".
    if ( m/^\s*(our\s+)?\$RPM_Requires\s*=\s*["'](.*)['"]/i) {
      foreach $_ (split(/\s+/, $2)) {
	print "$_\n";
      }
    }

    if ( 

# ouch could be in a eval, perhaps we do not want these since we catch
# an exception they must not be required

#   eval { require Term::ReadLine } or die $@;
#   eval "require Term::Rendezvous;" or die $@;
#   eval { require Carp } if defined $^S; # If error/warning during compilation,


	(m/^(\s*)         # we hope the inclusion starts the line
	 (require|use)\s+(?!\{)     # do not want 'do {' loops
	 # quotes around name are always legal
	 [\'\"]?([^\;\ \'\"\t]*)[\'\"]?[\t\;\ ]
	 # the syntax for 'use' allows version requirements
	 \s*([.0-9]*)
	 /x)
       ) {
      my ($whitespace, $statement, $module, $version) = ($1, $2, $3,$4);

      # we only consider require statements that are flush against