forked from lix-project/lix
6ec7460af1
Use the hash part of the store path as a key rather than a hash of the store path. This is enough to get the desired privacy property.
138 lines
4.1 KiB
Perl
138 lines
4.1 KiB
Perl
#! @perl@ -w @perlFlags@
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use strict;
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use File::Basename;
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use Nix::Config;
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use Nix::Store;
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my @binaryCacheUrls = split / /, ($ENV{"NIX_BINARY_CACHES"} || "");
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sub getInfoFrom {
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my ($storePath, $pathHash, $binaryCacheUrl) = @_;
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my $infoUrl = "$binaryCacheUrl/$pathHash.narinfo";
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#print STDERR "checking $infoUrl...\n";
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my $s = `$Nix::Config::curl --fail --silent --location $infoUrl`;
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if ($? != 0) {
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my $status = $? >> 8;
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print STDERR "could not download ‘$infoUrl’ (curl returned status ", $? >> 8, ")\n"
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if $status != 22 && $status != 37;
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return undef;
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}
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my ($storePath2, $url, $compression, $fileHash, $fileSize, $narHash, $narSize, $deriver);
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my @refs;
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foreach my $line (split "\n", $s) {
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$line =~ /^(.*): (.*)$/ or return undef;
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if ($1 eq "StorePath") { $storePath2 = $2; }
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elsif ($1 eq "URL") { $url = $2; }
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elsif ($1 eq "Compression") { $compression = $2; }
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elsif ($1 eq "FileHash") { $fileHash = $2; }
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elsif ($1 eq "FileSize") { $fileSize = int($2); }
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elsif ($1 eq "NarHash") { $narHash = $2; }
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elsif ($1 eq "NarSize") { $narSize = int($2); }
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elsif ($1 eq "References") { @refs = split / /, $2; }
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elsif ($1 eq "Deriver") { $deriver = $2; }
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}
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if ($storePath ne $storePath2 || !defined $url || !defined $narHash || !defined $narSize) {
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print STDERR "bad NAR info file ‘$infoUrl’\n";
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return undef
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}
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return
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{ url => $url
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, compression => ($compression || "bzip2")
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, fileHash => $fileHash
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, fileSize => $fileSize
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, narHash => $narHash
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, narSize => $narSize
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, refs => [ map { "$Nix::Config::storeDir/$_" } @refs ]
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, deriver => "$Nix::Config::storeDir/$deriver"
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}
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}
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sub getInfo {
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my ($storePath) = @_;
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my $pathHash = substr(basename($storePath), 0, 32);
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cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
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my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
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return $info if defined $info;
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}
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return undef;
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}
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sub downloadBinary {
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my ($storePath) = @_;
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my $pathHash = substr(basename($storePath), 0, 32);
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cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
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my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
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if (defined $info) {
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my $decompressor;
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if ($info->{compression} eq "bzip2") { $decompressor = "$Nix::Config::bzip2 -d"; }
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elsif ($info->{compression} eq "xz") { $decompressor = "$Nix::Config::xz -d"; }
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else {
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print STDERR "unknown compression method ‘$info->{compression}’\n";
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next;
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}
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if (system("$Nix::Config::curl --fail --location $binaryCacheUrl/$info->{url} | $decompressor | $Nix::Config::binDir/nix-store --restore $storePath") == 0) {
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return 1;
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}
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}
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}
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return 0;
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}
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if ($ARGV[0] eq "--query") {
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while (<STDIN>) {
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my $cmd = $_; chomp $cmd;
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if ($cmd eq "have") {
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my $storePath = <STDIN>; chomp $storePath;
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# FIXME: want to give correct info here, but it's too slow.
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print "0\n";
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#my $info = getInfo($storePath);
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#if (defined $info) { print "1\n"; } else { print "0\n"; }
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}
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elsif ($cmd eq "info") {
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my $storePath = <STDIN>; chomp $storePath;
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my $info = getInfo($storePath);
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if (defined $info) {
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print "1\n";
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print $info->{deriver} || "", "\n";
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print scalar @{$info->{refs}}, "\n";
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print "$_\n" foreach @{$info->{refs}};
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print $info->{fileSize} || 0, "\n";
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print $info->{narSize}, "\n";
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} else {
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print "0\n";
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}
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}
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else { die "unknown command `$cmd'"; }
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flush STDOUT;
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}
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}
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elsif ($ARGV[0] eq "--substitute") {
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my $storePath = $ARGV[1] or die;
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if (!downloadBinary($storePath)) {
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print STDERR "could not download ‘$storePath’ from any binary cache\n";
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}
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}
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else {
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die;
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}
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