1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
|
#! @perl@ -w @perlFlags@
use strict;
use File::Basename;
use Nix::Config;
use Nix::Store;
my @binaryCacheUrls = split / /, ($ENV{"NIX_BINARY_CACHES"} || "");
sub getInfoFrom {
my ($storePath, $pathHash, $binaryCacheUrl) = @_;
my $infoUrl = "$binaryCacheUrl/$pathHash.narinfo";
#print STDERR "checking $infoUrl...\n";
my $s = `$Nix::Config::curl --fail --silent --location $infoUrl`;
if ($? != 0) {
my $status = $? >> 8;
print STDERR "could not download ‘$infoUrl’ (curl returned status ", $? >> 8, ")\n"
if $status != 22 && $status != 37;
return undef;
}
my ($storePath2, $url, $compression, $fileHash, $fileSize, $narHash, $narSize, $deriver);
my @refs;
foreach my $line (split "\n", $s) {
$line =~ /^(.*): (.*)$/ or return undef;
if ($1 eq "StorePath") { $storePath2 = $2; }
elsif ($1 eq "URL") { $url = $2; }
elsif ($1 eq "Compression") { $compression = $2; }
elsif ($1 eq "FileHash") { $fileHash = $2; }
elsif ($1 eq "FileSize") { $fileSize = int($2); }
elsif ($1 eq "NarHash") { $narHash = $2; }
elsif ($1 eq "NarSize") { $narSize = int($2); }
elsif ($1 eq "References") { @refs = split / /, $2; }
elsif ($1 eq "Deriver") { $deriver = $2; }
}
if ($storePath ne $storePath2 || !defined $url || !defined $narHash) {
print STDERR "bad NAR info file ‘$infoUrl’\n";
return undef;
}
return
{ url => $url
, compression => ($compression || "bzip2")
, fileHash => $fileHash
, fileSize => $fileSize
, narHash => $narHash
, narSize => $narSize
, refs => [ map { "$Nix::Config::storeDir/$_" } @refs ]
, deriver => defined $deriver ? "$Nix::Config::storeDir/$deriver" : undef
}
}
sub getInfo {
my ($storePath) = @_;
my $pathHash = substr(basename($storePath), 0, 32);
cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
return $info if defined $info;
}
return undef;
}
sub downloadBinary {
my ($storePath) = @_;
my $pathHash = substr(basename($storePath), 0, 32);
cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
if (defined $info) {
my $decompressor;
if ($info->{compression} eq "bzip2") { $decompressor = "$Nix::Config::bzip2 -d"; }
elsif ($info->{compression} eq "xz") { $decompressor = "$Nix::Config::xz -d"; }
else {
print STDERR "unknown compression method ‘$info->{compression}’\n";
next;
}
if (system("$Nix::Config::curl --fail --location $binaryCacheUrl/$info->{url} | $decompressor | $Nix::Config::binDir/nix-store --restore $storePath") != 0) {
die "download of `$info->{url}' failed" . ($! ? ": $!" : "") . "\n" unless $? == 0;
next;
}
# The hash in the manifest can be either in base-16 or
# base-32. Handle both.
$info->{narHash} =~ /^sha256:(.*)$/ or die "invalid hash";
my $hash = $1;
my $hash2 = hashPath("sha256", 1, $storePath);
die "hash mismatch in downloaded path ‘$storePath’; expected $hash, got $hash2\n"
if $hash ne $hash2;
return 1;
}
}
return 0;
}
if ($ARGV[0] eq "--query") {
while (<STDIN>) {
my $cmd = $_; chomp $cmd;
if ($cmd eq "have") {
my $storePath = <STDIN>; chomp $storePath;
# FIXME: want to give correct info here, but it's too slow.
print "0\n";
#my $info = getInfo($storePath);
#if (defined $info) { print "1\n"; } else { print "0\n"; }
}
elsif ($cmd eq "info") {
my $storePath = <STDIN>; chomp $storePath;
my $info = getInfo($storePath);
if (defined $info) {
print "1\n";
print $info->{deriver} || "", "\n";
print scalar @{$info->{refs}}, "\n";
print "$_\n" foreach @{$info->{refs}};
print $info->{fileSize} || 0, "\n";
print $info->{narSize} || 0, "\n";
} else {
print "0\n";
}
}
else { die "unknown command `$cmd'"; }
flush STDOUT;
}
}
elsif ($ARGV[0] eq "--substitute") {
my $storePath = $ARGV[1] or die;
if (!downloadBinary($storePath)) {
print STDERR "could not download ‘$storePath’ from any binary cache\n";
}
}
else {
die;
}
|
