#!/usr/bin/perl
use strict;
use Cwd;
use Getopt::Long;
use File::Temp qw/tempdir/;
use File::Basename;

sub xsystem(@);

my @exclude = ();
my @library = ();
my $ar;
our $x;
GetOptions('exclude=s'=>\@exclude, 'library=s'=>\@library, 'ar=s'=>\$ar, 'x!'=>\$x);

die "$0: must specify --ar\n" unless defined $ar;
my $lib = shift or die "$0: missing lib argument\nusage: $0 lib [map-file]\n";
$lib = Cwd::abs_path($lib);

my %excludes = map {($_, 1)} @exclude;
my $libraries = join('|', map {quotemeta} @library);

my %sources = ();
while (<>) {
    my ($source, $file, $absfile);
    if (m%^($libraries)\(([^)]*)\)%o) {
	$source = $1;
	$absfile = $file = $2;
    } elsif (/^LOAD\s+(.*\.o)$/o) {
	$source = '.';
	$file = $1;
	$absfile = Cwd::abs_path($file);
    } else {
	next;
    }
    push @{$sources{$source}}, $absfile unless $excludes{$file} || $excludes{$source};
}

my $here = getcwd();
my $dir = tempdir(CLEANUP=>1);
chdir $dir;
my @files = ();
for (sort keys %sources) {
    if ($_ eq '.') {
	xsystem '/bin/cp', '-a', @{$sources{$_}}, '.';
    } else {
	xsystem $ar, 'x',  $_, @{$sources{$_}}, '.';
    }
    push @files, map {basename($_)} @{$sources{$_}};
}

unlink $lib;
xsystem $ar, 'crs', $lib, sort @files;
exit 0;

sub xsystem(@) {
    print join(' ', 'x', @_), "\n" if $x;
    system(@_) == 0 or die "$0: $_[0] $_[1] $_[2]... exited with non-zero status\n";
}

END {
    chdir '/tmp';	# Allow $dir directory removal on Windows
}