scripts/download.pl

   1 #!/usr/bin/env perl
   2 #
   3 # Copyright (C) 2006 OpenWrt.org
   4 # Copyright (C) 2016 LEDE project
   5 #
   6 # This is free software, licensed under the GNU General Public License v2.
   7 # See /LICENSE for more information.
   8 #
   9
  10 use strict;
  11 use warnings;
  12 use File::Basename;
  13 use File::Copy;
  14 use Text::ParseWords;
  15
  16 @ARGV > 2 or die "Syntax: $0 <target dir> <filename> <hash> <url filename> [<mirror> ...]\n";
  17
  18 my $url_filename;
  19 my $target = shift @ARGV;
  20 my $filename = shift @ARGV;
  21 my $file_hash = shift @ARGV;
  22 $url_filename = shift @ARGV unless $ARGV[0] =~ /:\/\//;
  23 my $scriptdir = dirname($0);
  24 my @mirrors;
  25 my $ok;
  26
  27 $url_filename or $url_filename = $filename;
  28
  29 sub localmirrors {
  30         my @mlist;
  31         open LM, "$scriptdir/localmirrors" and do {
  32             while (<LM>) {
  33                         chomp $_;
  34                         push @mlist, $_ if $_;
  35                 }
  36                 close LM;
  37         };
  38         open CONFIG, "<".$ENV{'TOPDIR'}."/.config" and do {
  39                 while (<CONFIG>) {
  40                         /^CONFIG_LOCALMIRROR="(.+)"/ and do {
  41                                 chomp;
  42                                 my @local_mirrors = split(/;/, $1);
  43                                 push @mlist, @local_mirrors;
  44                         };
  45                 }
  46                 close CONFIG;
  47         };
  48
  49         my $mirror = $ENV{'DOWNLOAD_MIRROR'};
  50         $mirror and push @mlist, split(/;/, $mirror);
  51
  52         return @mlist;
  53 }
  54
  55 sub which($) {
  56         my $prog = shift;
  57         my $res = `which $prog`;
  58         $res or return undef;
  59         $res =~ /^no / and return undef;
  60         $res =~ /not found/ and return undef;
  61         return $res;
  62 }
  63
  64 sub hash_cmd() {
  65         my $len = length($file_hash);
  66         my $cmd;
  67
  68         $len == 64 and return "mkhash sha256";
  69         $len == 32 and return "mkhash md5";
  70         return undef;
  71 }
  72
  73 sub download_cmd($) {
  74         my $url = shift;
  75         my $have_curl = 0;
  76
  77         if (open CURL, '-|', 'curl', '--version') {
  78                 if (defined(my $line = readline CURL)) {
  79                         $have_curl = 1 if $line =~ /^curl /;
  80                 }
  81                 close CURL;
  82         }
  83
  84         return $have_curl
  85                 ? (qw(curl -f --connect-timeout 20 --retry 5 --location), shellwords($ENV{CURL_OPTIONS} || ''), $url)
  86                 : (qw(wget --tries=5 --timeout=20 --output-document=-), shellwords($ENV{WGET_OPTIONS} || ''), $url)
  87         ;
  88 }
  89
  90 my $hash_cmd = hash_cmd();
  91
  92 sub download
  93 {
  94         my $mirror = shift;
  95
  96         $mirror =~ s!/$!!;
  97
  98         if ($mirror =~ s!^file://!!) {
  99                 if (! -d "$mirror") {
 100                         print STDERR "Wrong local cache directory -$mirror-.\n";
 101                         cleanup();
 102                         return;
 103                 }
 104
 105                 if (! -d "$target") {
 106                         system("mkdir", "-p", "$target/");
 107                 }
 108
 109                 if (! open TMPDLS, "find $mirror -follow -name $filename 2>/dev/null |") {
 110                         print("Failed to search for $filename in $mirror\n");
 111                         return;
 112                 }
 113
 114                 my $link;
 115
 116                 while (defined(my $line = readline TMPDLS)) {
 117                         chomp ($link = $line);
 118                         if ($. > 1) {
 119                                 print("$. or more instances of $filename in $mirror found . Only one instance allowed.\n");
 120                                 return;
 121                         }
 122                 }
 123
 124                 close TMPDLS;
 125
 126                 if (! $link) {
 127                         print("No instances of $filename found in $mirror.\n");
 128                         return;
 129                 }
 130
 131                 print("Copying $filename from $link\n");
 132                 copy($link, "$target/$filename.dl");
 133
 134                 $hash_cmd and do {
 135                         if (system("cat '$target/$filename.dl' | $hash_cmd > '$target/$filename.hash'")) {
 136                                 print("Failed to generate hash for $filename\n");
 137                                 return;
 138                         }
 139                 };
 140         } else {
 141                 my @cmd = download_cmd("$mirror/$url_filename");
 142                 open(FETCH_FD, '-|', @cmd) or die "Cannot launch curl or wget.\n";
 143                 $hash_cmd and do {
 144                         open MD5SUM, "| $hash_cmd > '$target/$filename.hash'" or die "Cannot launch $hash_cmd.\n";
 145                 };
 146                 open OUTPUT, "> $target/$filename.dl" or die "Cannot create file $target/$filename.dl: $!\n";
 147                 my $buffer;
 148                 while (read FETCH_FD, $buffer, 1048576) {
 149                         $hash_cmd and print MD5SUM $buffer;
 150                         print OUTPUT $buffer;
 151                 }
 152                 $hash_cmd and close MD5SUM;
 153                 close FETCH_FD;
 154                 close OUTPUT;
 155
 156                 if ($? >> 8) {
 157                         print STDERR "Download failed.\n";
 158                         cleanup();
 159                         return;
 160                 }
 161         }
 162
 163         $hash_cmd and do {
 164                 my $sum = `cat "$target/$filename.hash"`;
 165                 $sum =~ /^(\w+)\s*/ or die "Could not generate file hash\n";
 166                 $sum = $1;
 167
 168                 if ($sum ne $file_hash) {
 169                         print STDERR "MD5 sum of the downloaded file does not match (file: $sum, requested: $file_hash) - deleting download.\n";
 170                         cleanup();
 171                         return;
 172                 }
 173         };
 174
 175         unlink "$target/$filename";
 176         system("mv", "$target/$filename.dl", "$target/$filename");
 177         cleanup();
 178 }
 179
 180 sub cleanup
 181 {
 182         unlink "$target/$filename.dl";
 183         unlink "$target/$filename.hash";
 184 }
 185
 186 @mirrors = localmirrors();
 187
 188 foreach my $mirror (@ARGV) {
 189         if ($mirror =~ /^\@SF\/(.+)$/) {
 190                 # give sourceforge a few more tries, because it redirects to different mirrors
 191                 #for (1 .. 5) {
 192                 #       push @mirrors, "http://downloads.sourceforge.net/$1";
 193                 #}
 194         } elsif ($mirror =~ /^\@APACHE\/(.+)$/) {
 195                 push @mirrors, "https://mirror.netcologne.de/apache.org/$1";
 196                 push @mirrors, "https://mirror.aarnet.edu.au/pub/apache/$1";
 197         } elsif ($mirror =~ /^\@GNU\/(.+)$/) {
 198                 push @mirrors, "https://mirrors.rit.edu/gnu/$1";
 199                 push @mirrors, "https://mirror.netcologne.de/gnu/$1";
 200         } elsif ($mirror =~ /^\@SAVANNAH\/(.+)$/) {
 201                 push @mirrors, "https://mirror.netcologne.de/savannah/$1";
 202         } elsif ($mirror =~ /^\@KERNEL\/(.+)$/) {
 203                 my @extra = ( $1 );
 204                 if ($filename =~ /linux-\d+\.\d+(?:\.\d+)?-rc/) {
 205                         push @extra, "$extra[0]/testing";
 206                 } elsif ($filename =~ /linux-(\d+\.\d+(?:\.\d+)?)/) {
 207                         push @extra, "$extra[0]/longterm/v$1";
 208                 }
 209                 foreach my $dir (@extra) {
 210                         push @mirrors, "https://cdn.kernel.org/pub/$dir";
 211                         push @mirrors, "https://mirror.rackspace.com/kernel.org/$dir";
 212                 }
 213     } elsif ($mirror =~ /^\@KERNEL_LIBRE\/(.+)$/) {
 214                 my @extra = ( $1 );
 215                 if ($filename =~ /linux-libre-\d+\.\d+(?:\.\d+)?-rc-gnu/) {
 216                         push @extra, "$extra[0]/testing";
 217                 } elsif ($filename =~ /linux-libre-(\d+\.\d+(?:\.\d+)?)-gnu/) {
 218                         push @extra, "$extra[0]/v$1";
 219                 }
 220                 foreach my $dir (@extra) {
 221                         push @mirrors, "https://linux-libre.fsfla.org/pub/linux-libre/releases/$dir";
 222                 }
 223     } elsif ($mirror =~ /^\@GNOME\/(.+)$/) {
 224                 push @mirrors, "https://mirror.csclub.uwaterloo.ca/gnome/sources/$1";
 225     }
 226     else {
 227                 push @mirrors, $mirror;
 228         }
 229 }
 230
 231 push @mirrors, 'https://librecmc.org/librecmc/downloads/sources/v1.5';
 232
 233 while (!-f "$target/$filename") {
 234         my $mirror = shift @mirrors;
 235         $mirror or die "No more mirrors to try - giving up.\n";
 236
 237         download($mirror);
 238 }
 239
 240 $SIG{INT} = \&cleanup;
 241