#!/usr/bin/perl
#####################################################################
#                                                                   #
# Check system dependences between php-pear modules                 #
#                                                                   #
# Paweł Gołaszewski <blues@ds.pg.gda.pl>                            #
# Michał Moskal <malekith@pld-linux.org>                            #
# ------------------------------------------------------------------#
# TODO:                                                             #
# - extension_loaded - dependencies.                                #
# - some clean-up...                                                #
#####################################################################

die "You have to specify input files" if (@ARGV < 1);

@files = ();
%req = ();

while (@ARGV > 0) {
	$f = shift;
	push @files, $f;
	# skip non-php files
	next unless ($f =~ /\.php$/);
	open(F, "< $f") or die;

	while (<F>) {
		# skip comments
		next if (/^\s*(#|\/\/|\*|\/\*)/);

		while (/(\W|^)(require|include)(_once)?
			  \s* \(? \s* ("([^"]*)"|'([^']*)') 
			  \s* \)? \s* ;/xg) {
			if ($5 ne "") {
				$x = $5;
			} elsif ($6 ne "") {
				$x = $6;
			} else {
				next;
			}

			next if ($x =~ m|^\./| or $x =~ /\$/);
			$req{$x} = 1;
		}
	}
}

f: for $f (keys %req) {
	for $g (@files) { next f if ($g =~ /\Q$f\E$/); }
	print "pear($f)\n";
}