download.pl

#!/usr/bin/env perl
# 
# Copyright (C) 2006 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

use strict;
use warnings;
use File::Basename;
use File::Copy;

@ARGV > 2 or die "Syntax: $0 <target dir> <filename> <hash> <url filename> [<mirror> ...]\n";

my $url_filename;
my $target = shift @ARGV;
my $filename = shift @ARGV;
my $file_hash = shift @ARGV;
$url_filename = shift @ARGV unless $ARGV[0] =~ /:\/\//;
my $scriptdir = dirname($0);
my @mirrors;
my $ok;

$url_filename or $url_filename = $filename;

sub localmirrors {
	my @mlist;
	open LM, "$scriptdir/localmirrors" and do {
	    while (<LM>) {
			chomp $_;
			push @mlist, $_ if $_;
		}
		close LM;
	};
	open CONFIG, "<".$ENV{'TOPDIR'}."/.config" and do {
		while (<CONFIG>) {
			/^CONFIG_LOCALMIRROR="(.+)"/ and do {
				chomp;
				my @local_mirrors = split(/;/, $1);
				push @mlist, @local_mirrors;
			};
		}
		close CONFIG;
	};

	my $mirror = $ENV{'DOWNLOAD_MIRROR'};
	$mirror and push @mlist, split(/;/, $mirror);

	return @mlist;
}

sub which($) {
	my $prog = shift;
	my $res = `which $prog`;
	$res or return undef;
	$res =~ /^no / and return undef;
	$res =~ /not found/ and return undef;
	return $res;
}

sub hash_cmd() {
	my $len = length($file_hash);
	my $cmd;

	$len == 64 and return "openssl dgst -sha256 | sed -e 's,.*= ,,'";
	$len == 32 and do {
		my $cmd = which("md5sum") || which("md5") || die 'no md5 checksum program found, please install md5 or md5sum';
		chomp $cmd;
		return $cmd;