pyrox.dev
1#! /usr/bin/env nix-shell
2#! nix-shell -i perl -p perl perlPackages.NetAmazonS3 perlPackages.FileSlurp nixUnstable nixUnstable.perl-bindings
3
4# This command uploads tarballs to tarballs.nixos.org, the
5# content-addressed cache used by fetchurl as a fallback for when
6# upstream tarballs disappear or change. Usage:
7#
8# 1) To upload one or more files:
9#
10# $ copy-tarballs.pl --file /path/to/tarball.tar.gz
11#
12# 2) To upload all files obtained via calls to fetchurl in a Nix derivation:
13#
14# $ copy-tarballs.pl --expr '(import <nixpkgs> {}).hello'
15
16use strict;
17use warnings;
18use File::Basename;
19use File::Path;
20use File::Slurp;
21use JSON;
22use Net::Amazon::S3;
23use Nix::Store;
24
25isValidPath("/nix/store/aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa-foo"); # FIXME: forces Nix::Store initialisation
26
27sub usage {
28 die "Syntax: $0 [--dry-run] [--exclude REGEXP] [--expr EXPR | --file FILES...]\n";
29}
30
31my $dryRun = 0;
32my $expr;
33my @fileNames;
34my $exclude;
35
36while (@ARGV) {
37 my $flag = shift @ARGV;
38
39 if ($flag eq "--expr") {
40 $expr = shift @ARGV or die "--expr requires an argument";
41 } elsif ($flag eq "--file") {
42 @fileNames = @ARGV;
43 last;
44 } elsif ($flag eq "--dry-run") {
45 $dryRun = 1;
46 } elsif ($flag eq "--exclude") {
47 $exclude = shift @ARGV or die "--exclude requires an argument";
48 } else {
49 usage();
50 }
51}
52
53
54# S3 setup.
55my $aws_access_key_id = $ENV{'AWS_ACCESS_KEY_ID'} or die "AWS_ACCESS_KEY_ID not set\n";
56my $aws_secret_access_key = $ENV{'AWS_SECRET_ACCESS_KEY'} or die "AWS_SECRET_ACCESS_KEY not set\n";
57
58my $s3 = Net::Amazon::S3->new(
59 { aws_access_key_id => $aws_access_key_id,
60 aws_secret_access_key => $aws_secret_access_key,
61 retry => 1,
62 host => "s3-eu-west-1.amazonaws.com",
63 });
64
65my $bucket = $s3->bucket("nixpkgs-tarballs") or die;
66
67my $doWrite = 0;
68my $cacheFile = ($ENV{"HOME"} or die "\$HOME is not set") . "/.cache/nix/copy-tarballs";
69my %cache;
70$cache{$_} = 1 foreach read_file($cacheFile, err_mode => 'quiet', chomp => 1);
71$doWrite = 1;
72
73END() {
74 File::Path::mkpath(dirname($cacheFile), 0, 0755);
75 write_file($cacheFile, map { "$_\n" } keys %cache) if $doWrite;
76}
77
78sub alreadyMirrored {
79 my ($algo, $hash) = @_;
80 my $key = "$algo/$hash";
81 return 1 if defined $cache{$key};
82 my $res = defined $bucket->get_key($key);
83 $cache{$key} = 1 if $res;
84 return $res;
85}
86
87sub uploadFile {
88 my ($fn, $name) = @_;
89
90 my $md5_16 = hashFile("md5", 0, $fn) or die;
91 my $sha1_16 = hashFile("sha1", 0, $fn) or die;
92 my $sha256_32 = hashFile("sha256", 1, $fn) or die;
93 my $sha256_16 = hashFile("sha256", 0, $fn) or die;
94 my $sha512_32 = hashFile("sha512", 1, $fn) or die;
95 my $sha512_16 = hashFile("sha512", 0, $fn) or die;
96
97 my $mainKey = "sha512/$sha512_16";
98
99 # Create redirects from the other hash types.
100 sub redirect {
101 my ($name, $dest) = @_;
102 #print STDERR "linking $name to $dest...\n";
103 $bucket->add_key($name, "", {
104 'x-amz-website-redirect-location' => "/" . $dest,
105 'x-amz-acl' => "public-read"
106 })
107 or die "failed to create redirect from $name to $dest\n";
108 $cache{$name} = 1;
109 }
110 redirect "md5/$md5_16", $mainKey;
111 redirect "sha1/$sha1_16", $mainKey;
112 redirect "sha256/$sha256_32", $mainKey;
113 redirect "sha256/$sha256_16", $mainKey;
114 redirect "sha512/$sha512_32", $mainKey;
115
116 # Upload the file as sha512/<hash-in-base-16>.
117 print STDERR "uploading $fn to $mainKey...\n";
118 $bucket->add_key_filename($mainKey, $fn, {
119 'x-amz-meta-original-name' => $name,
120 'x-amz-acl' => "public-read"
121 })
122 or die "failed to upload $fn to $mainKey\n";
123 $cache{$mainKey} = 1;
124}
125
126if (scalar @fileNames) {
127 my $res = 0;
128 foreach my $fn (@fileNames) {
129 eval {
130 if (alreadyMirrored("sha512", hashFile("sha512", 0, $fn))) {
131 print STDERR "$fn is already mirrored\n";
132 } else {
133 uploadFile($fn, basename $fn);
134 }
135 };
136 if ($@) {
137 warn "$@";
138 $res = 1;
139 }
140 }
141 exit $res;
142}
143
144elsif (defined $expr) {
145
146 # Evaluate find-tarballs.nix.
147 my $pid = open(JSON, "-|", "nix-instantiate", "--eval", "--json", "--strict",
148 "<nixpkgs/maintainers/scripts/find-tarballs.nix>",
149 "--arg", "expr", $expr);
150 my $stdout = <JSON>;
151 waitpid($pid, 0);
152 die "$0: evaluation failed\n" if $?;
153 close JSON;
154
155 my $fetches = decode_json($stdout);
156
157 print STDERR "evaluation returned ", scalar(@{$fetches}), " tarballs\n";
158
159 # Check every fetchurl call discovered by find-tarballs.nix.
160 my $mirrored = 0;
161 my $have = 0;
162 foreach my $fetch (sort { $a->{url} cmp $b->{url} } @{$fetches}) {
163 my $url = $fetch->{url};
164 my $algo = $fetch->{type};
165 my $hash = $fetch->{hash};
166 my $name = $fetch->{name};
167
168 if (defined $ENV{DEBUG}) {
169 print "$url $algo $hash\n";
170 next;
171 }
172
173 if ($url !~ /^http:/ && $url !~ /^https:/ && $url !~ /^ftp:/ && $url !~ /^mirror:/) {
174 print STDERR "skipping $url (unsupported scheme)\n";
175 next;
176 }
177
178 next if defined $exclude && $url =~ /$exclude/;
179
180 if (alreadyMirrored($algo, $hash)) {
181 $have++;
182 next;
183 }
184
185 my $storePath = makeFixedOutputPath(0, $algo, $hash, $name);
186
187 print STDERR "mirroring $url ($storePath)...\n";
188
189 if ($dryRun) {
190 $mirrored++;
191 next;
192 }
193
194 # Substitute the output.
195 if (!isValidPath($storePath)) {
196 system("nix-store", "-r", $storePath);
197 }
198
199 # Otherwise download the file using nix-prefetch-url.
200 if (!isValidPath($storePath)) {
201 $ENV{QUIET} = 1;
202 $ENV{PRINT_PATH} = 1;
203 my $fh;
204 my $pid = open($fh, "-|", "nix-prefetch-url", "--type", $algo, $url, $hash) or die;
205 waitpid($pid, 0) or die;
206 if ($? != 0) {
207 print STDERR "failed to fetch $url: $?\n";
208 next;
209 }
210 <$fh>; my $storePath2 = <$fh>; chomp $storePath2;
211 if ($storePath ne $storePath2) {
212 warn "strange: $storePath != $storePath2\n";
213 next;
214 }
215 }
216
217 uploadFile($storePath, $url);
218 $mirrored++;
219 }
220
221 print STDERR "mirrored $mirrored files, already have $have files\n";
222}
223
224else {
225 usage();
226}