651bc94df4
In the build system, flock will prevent multiple concurrent downloads for the same file. However, if one download request for the same file is waiting for another one to finish, it will result in downloading the same file twice consecutively. Prevent this issue by exiting immediately if the file has already been downloaded Signed-off-by: Felix Fietkau <nbd@nbd.name>
258 lines
7.5 KiB
Perl
Executable File
258 lines
7.5 KiB
Perl
Executable File
#!/usr/bin/env perl
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#
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# Copyright (C) 2006 OpenWrt.org
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# Copyright (C) 2016 LEDE project
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#
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# This is free software, licensed under the GNU General Public License v2.
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# See /LICENSE for more information.
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#
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use strict;
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use warnings;
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use File::Basename;
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use File::Copy;
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@ARGV > 2 or die "Syntax: $0 <target dir> <filename> <hash> <url filename> [<mirror> ...]\n";
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my $url_filename;
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my $target = shift @ARGV;
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my $filename = shift @ARGV;
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my $file_hash = shift @ARGV;
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$url_filename = shift @ARGV unless $ARGV[0] =~ /:\/\//;
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my $scriptdir = dirname($0);
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my @mirrors;
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my $ok;
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$url_filename or $url_filename = $filename;
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sub localmirrors {
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my @mlist;
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open LM, "$scriptdir/localmirrors" and do {
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while (<LM>) {
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chomp $_;
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push @mlist, $_ if $_;
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}
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close LM;
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};
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open CONFIG, "<".$ENV{'TOPDIR'}."/.config" and do {
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while (<CONFIG>) {
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/^CONFIG_LOCALMIRROR="(.+)"/ and do {
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chomp;
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my @local_mirrors = split(/;/, $1);
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push @mlist, @local_mirrors;
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};
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}
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close CONFIG;
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};
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my $mirror = $ENV{'DOWNLOAD_MIRROR'};
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$mirror and push @mlist, split(/;/, $mirror);
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return @mlist;
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}
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sub which($) {
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my $prog = shift;
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my $res = `which $prog`;
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$res or return undef;
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$res =~ /^no / and return undef;
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$res =~ /not found/ and return undef;
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return $res;
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}
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sub hash_cmd() {
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my $len = length($file_hash);
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my $cmd;
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$len == 64 and return "openssl dgst -sha256 | sed -e 's,.*= ,,'";
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$len == 32 and do {
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my $cmd = which("md5sum") || which("md5") || die 'no md5 checksum program found, please install md5 or md5sum';
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chomp $cmd;
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return $cmd;
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};
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return undef;
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}
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my $hash_cmd = hash_cmd();
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sub download
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{
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my $mirror = shift;
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my $options = $ENV{WGET_OPTIONS} || "";
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$mirror =~ s!/$!!;
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if ($mirror =~ s!^file://!!) {
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if (! -d "$mirror") {
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print STDERR "Wrong local cache directory -$mirror-.\n";
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cleanup();
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return;
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}
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if (! -d "$target") {
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system("mkdir", "-p", "$target/");
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}
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if (! open TMPDLS, "find $mirror -follow -name $filename 2>/dev/null |") {
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print("Failed to search for $filename in $mirror\n");
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return;
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}
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my $link;
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while (defined(my $line = readline TMPDLS)) {
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chomp ($link = $line);
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if ($. > 1) {
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print("$. or more instances of $filename in $mirror found . Only one instance allowed.\n");
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return;
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}
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}
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close TMPDLS;
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if (! $link) {
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print("No instances of $filename found in $mirror.\n");
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return;
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}
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print("Copying $filename from $link\n");
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copy($link, "$target/$filename.dl");
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$hash_cmd and do {
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if (system("cat '$target/$filename.dl' | $hash_cmd > '$target/$filename.hash'")) {
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print("Failed to generate hash for $filename\n");
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return;
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}
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};
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} else {
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open WGET, "wget -t5 --timeout=20 --no-check-certificate $options -O- '$mirror/$url_filename' |" or die "Cannot launch wget.\n";
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$hash_cmd and do {
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open MD5SUM, "| $hash_cmd > '$target/$filename.hash'" or die "Cannot launch $hash_cmd.\n";
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};
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open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
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my $buffer;
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while (read WGET, $buffer, 1048576) {
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$hash_cmd and print MD5SUM $buffer;
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print OUTPUT $buffer;
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}
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$hash_cmd and close MD5SUM;
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close WGET;
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close OUTPUT;
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if ($? >> 8) {
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print STDERR "Download failed.\n";
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cleanup();
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return;
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}
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}
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$hash_cmd and do {
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my $sum = `cat "$target/$filename.hash"`;
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$sum =~ /^(\w+)\s*/ or die "Could not generate file hash\n";
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$sum = $1;
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if ($sum ne $file_hash) {
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print STDERR "MD5 sum of the downloaded file does not match (file: $sum, requested: $file_hash) - deleting download.\n";
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cleanup();
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return;
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}
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};
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unlink "$target/$filename";
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system("mv", "$target/$filename.dl", "$target/$filename");
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cleanup();
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}
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sub cleanup
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{
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unlink "$target/$filename.dl";
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unlink "$target/$filename.hash";
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}
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@mirrors = localmirrors();
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foreach my $mirror (@ARGV) {
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if ($mirror =~ /^\@SF\/(.+)$/) {
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# give sourceforge a few more tries, because it redirects to different mirrors
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for (1 .. 5) {
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push @mirrors, "http://downloads.sourceforge.net/$1";
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}
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} elsif ($mirror =~ /^\@APACHE\/(.+)$/) {
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push @mirrors, "https://mirror.netcologne.de/apache.org/$1";
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push @mirrors, "https://mirror.aarnet.edu.au/pub/apache/$1";
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push @mirrors, "http://mirror.cogentco.com/pub/apache/$1";
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push @mirrors, "http://mirror.csclub.uwaterloo.ca/apache/$1";
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push @mirrors, "http://mirror.navercorp.com/apache/$1";
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push @mirrors, "http://ftp.jaist.ac.jp/pub/apache/$1";
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push @mirrors, "ftp://apache.cs.utah.edu/apache.org/$1";
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push @mirrors, "ftp://apache.mirrors.ovh.net/ftp.apache.org/dist/$1";
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} elsif ($mirror =~ /^\@GITHUB\/(.+)$/) {
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# give github a few more tries (different mirrors)
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for (1 .. 5) {
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push @mirrors, "https://raw.githubusercontent.com/$1";
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}
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} elsif ($mirror =~ /^\@GNU\/(.+)$/) {
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push @mirrors, "https://mirrors.rit.edu/gnu/$1";
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push @mirrors, "https://mirror.netcologne.de/gnu/$1";
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push @mirrors, "http://ftp.kddilabs.jp/GNU/gnu/$1";
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push @mirrors, "http://www.nic.funet.fi/pub/gnu/gnu/$1";
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push @mirrors, "http://mirror.internode.on.net/pub/gnu/$1";
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push @mirrors, "http://mirror.navercorp.com/gnu/$1";
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push @mirrors, "ftp://mirror.csclub.uwaterloo.ca/gnu/$1";
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push @mirrors, "ftp://download.xs4all.nl/pub/gnu/";
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} elsif ($mirror =~ /^\@SAVANNAH\/(.+)$/) {
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push @mirrors, "https://mirror.netcologne.de/savannah/$1";
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push @mirrors, "http://mirror.csclub.uwaterloo.ca/nongnu/$1";
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push @mirrors, "http://ftp.acc.umu.se/mirror/gnu.org/savannah/$1";
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push @mirrors, "http://nongnu.uib.no/$1";
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push @mirrors, "http://ftp.igh.cnrs.fr/pub/nongnu/$1";
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push @mirrors, "http://public.p-knowledge.co.jp/Savannah-nongnu-mirror/$1";
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push @mirrors, "ftp://cdimage.debian.org/mirror/gnu.org/savannah/$1";
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push @mirrors, "ftp://ftp.acc.umu.se/mirror/gnu.org/savannah/$1";
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} elsif ($mirror =~ /^\@KERNEL\/(.+)$/) {
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my @extra = ( $1 );
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if ($filename =~ /linux-\d+\.\d+(?:\.\d+)?-rc/) {
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push @extra, "$extra[0]/testing";
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} elsif ($filename =~ /linux-(\d+\.\d+(?:\.\d+)?)/) {
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push @extra, "$extra[0]/longterm/v$1";
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}
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foreach my $dir (@extra) {
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push @mirrors, "https://cdn.kernel.org/pub/$dir";
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push @mirrors, "https://mirror.rackspace.com/kernel.org/$dir";
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push @mirrors, "http://download.xs4all.nl/ftp.kernel.org/pub/$dir";
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push @mirrors, "http://mirrors.mit.edu/kernel/$dir";
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push @mirrors, "http://ftp.nara.wide.ad.jp/pub/kernel.org/$dir";
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push @mirrors, "http://www.ring.gr.jp/archives/linux/kernel.org/$dir";
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push @mirrors, "ftp://ftp.riken.jp/Linux/kernel.org/$dir";
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push @mirrors, "ftp://www.mirrorservice.org/sites/ftp.kernel.org/pub/$dir";
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}
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} elsif ($mirror =~ /^\@GNOME\/(.+)$/) {
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push @mirrors, "http://mirror.csclub.uwaterloo.ca/gnome/sources/$1";
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push @mirrors, "http://ftp.acc.umu.se/pub/GNOME/sources/$1";
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push @mirrors, "http://ftp.kaist.ac.kr/gnome/sources/$1";
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push @mirrors, "http://www.mirrorservice.org/sites/ftp.gnome.org/pub/GNOME/sources/$1";
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push @mirrors, "http://mirror.internode.on.net/pub/gnome/sources/$1";
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push @mirrors, "http://ftp.belnet.be/ftp.gnome.org/sources/$1";
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push @mirrors, "ftp://ftp.cse.buffalo.edu/pub/Gnome/sources/$1";
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push @mirrors, "ftp://ftp.nara.wide.ad.jp/pub/X11/GNOME/sources/$1";
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}
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else {
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push @mirrors, $mirror;
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}
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}
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#push @mirrors, 'http://mirror1.openwrt.org';
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push @mirrors, 'http://sources.lede-project.org';
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push @mirrors, 'http://mirror2.openwrt.org/sources';
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push @mirrors, 'http://downloads.openwrt.org/sources';
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while (!-f "$target/$filename") {
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my $mirror = shift @mirrors;
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$mirror or die "No more mirrors to try - giving up.\n";
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download($mirror);
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}
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$SIG{INT} = \&cleanup;
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