mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-29 09:06:15 +02:00
22144afa8d
For instance, it's pointless to keep copy-from-other-stores running if there are no other stores, or download-using-manifests if there are no manifests. This also speeds things up because we don't send queries to those substituters.
587 lines
19 KiB
Perl
587 lines
19 KiB
Perl
#! @perl@ -w @perlFlags@
|
||
|
||
use DBI;
|
||
use File::Basename;
|
||
use IO::Select;
|
||
use Nix::Config;
|
||
use Nix::Store;
|
||
use Nix::Utils;
|
||
use Nix::Manifest;
|
||
use WWW::Curl::Easy;
|
||
use WWW::Curl::Multi;
|
||
use strict;
|
||
|
||
|
||
Nix::Config::readConfig;
|
||
|
||
my @caches;
|
||
my $gotCaches = 0;
|
||
|
||
my $maxParallelRequests = int($Nix::Config::config{"binary-caches-parallel-connections"} // 150);
|
||
$maxParallelRequests = 1 if $maxParallelRequests < 1;
|
||
|
||
my $ttlNegative = 24 * 3600; # when to purge negative lookups from the database
|
||
my $ttlNegativeUse = 3600; # how long negative lookups are valid for non-"have" lookups
|
||
my $didExpiration = 0;
|
||
|
||
my $showAfter = 5; # show that we're waiting for a request after this many seconds
|
||
|
||
my $debug = ($Nix::Config::config{"debug-subst"} // "") eq 1 || ($Nix::Config::config{"untrusted-debug-subst"} // "") eq 1;
|
||
|
||
my $cacheFileURLs = ($ENV{"_NIX_CACHE_FILE_URLS"} // "") eq 1; # for testing
|
||
|
||
my ($dbh, $queryCache, $insertNAR, $queryNAR, $insertNARExistence, $queryNARExistence, $expireNARExistence);
|
||
|
||
my $curlm = WWW::Curl::Multi->new;
|
||
my $activeRequests = 0;
|
||
my $curlIdCount = 1;
|
||
my %requests;
|
||
my %scheduled;
|
||
my $caBundle = $ENV{"CURL_CA_BUNDLE"} // $ENV{"OPENSSL_X509_CERT_FILE"};
|
||
|
||
my $userName = getpwuid($<) or die "cannot figure out user name";
|
||
|
||
|
||
sub addRequest {
|
||
my ($storePath, $url, $head) = @_;
|
||
|
||
my $curl = WWW::Curl::Easy->new;
|
||
my $curlId = $curlIdCount++;
|
||
$requests{$curlId} = { storePath => $storePath, url => $url, handle => $curl, content => "", type => $head ? "HEAD" : "GET"
|
||
, shown => 0, started => time() };
|
||
|
||
$curl->setopt(CURLOPT_PRIVATE, $curlId);
|
||
$curl->setopt(CURLOPT_URL, $url);
|
||
open (my $fh, ">", \$requests{$curlId}->{content});
|
||
$curl->setopt(CURLOPT_WRITEDATA, $fh);
|
||
$curl->setopt(CURLOPT_FOLLOWLOCATION, 1);
|
||
$curl->setopt(CURLOPT_CAINFO, $caBundle) if defined $caBundle;
|
||
$curl->setopt(CURLOPT_USERAGENT, "Nix/$Nix::Config::version");
|
||
$curl->setopt(CURLOPT_NOBODY, 1) if $head;
|
||
$curl->setopt(CURLOPT_FAILONERROR, 1);
|
||
$curl->setopt(CURLOPT_TIMEOUT, int($ENV{"NIX_CONNECT_TIMEOUT"} // 0));
|
||
|
||
if ($activeRequests >= $maxParallelRequests) {
|
||
$scheduled{$curlId} = 1;
|
||
} else {
|
||
$curlm->add_handle($curl);
|
||
$activeRequests++;
|
||
}
|
||
|
||
return $requests{$curlId};
|
||
}
|
||
|
||
|
||
sub processRequests {
|
||
while ($activeRequests) {
|
||
my ($rfds, $wfds, $efds) = $curlm->fdset();
|
||
#print STDERR "R = @{$rfds}, W = @{$wfds}, E = @{$efds}\n";
|
||
|
||
# Sleep until we can read or write some data.
|
||
if (scalar @{$rfds} + scalar @{$wfds} + scalar @{$efds} > 0) {
|
||
IO::Select->select(IO::Select->new(@{$rfds}), IO::Select->new(@{$wfds}), IO::Select->new(@{$efds}), 1.0);
|
||
}
|
||
|
||
if ($curlm->perform() != $activeRequests) {
|
||
while (my ($id, $result) = $curlm->info_read) {
|
||
if ($id) {
|
||
my $request = $requests{$id} or die;
|
||
my $handle = $request->{handle};
|
||
$request->{result} = $result;
|
||
$request->{httpStatus} = $handle->getinfo(CURLINFO_RESPONSE_CODE);
|
||
|
||
print STDERR "$request->{type} on $request->{url} [$request->{result}, $request->{httpStatus}]\n" if $debug;
|
||
|
||
$activeRequests--;
|
||
delete $request->{handle};
|
||
|
||
if (scalar(keys %scheduled) > 0) {
|
||
my $id2 = (keys %scheduled)[0];
|
||
$curlm->add_handle($requests{$id2}->{handle});
|
||
$activeRequests++;
|
||
delete $scheduled{$id2};
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
my $time = time();
|
||
while (my ($key, $request) = each %requests) {
|
||
next unless defined $request->{handle};
|
||
next if $request->{shown};
|
||
if ($time > $request->{started} + $showAfter) {
|
||
print STDERR "still waiting for ‘$request->{url}’ after $showAfter seconds...\n";
|
||
$request->{shown} = 1;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
sub initCache {
|
||
my $dbPath = "$Nix::Config::stateDir/binary-cache-v2.sqlite";
|
||
|
||
unlink "$Nix::Config::stateDir/binary-cache-v1.sqlite";
|
||
|
||
# Open/create the database.
|
||
$dbh = DBI->connect("dbi:SQLite:dbname=$dbPath", "", "")
|
||
or die "cannot open database `$dbPath'";
|
||
$dbh->{RaiseError} = 1;
|
||
$dbh->{PrintError} = 0;
|
||
|
||
$dbh->sqlite_busy_timeout(60 * 60 * 1000);
|
||
|
||
$dbh->do("pragma synchronous = off"); # we can always reproduce the cache
|
||
$dbh->do("pragma journal_mode = truncate");
|
||
|
||
# Initialise the database schema, if necessary.
|
||
$dbh->do(<<EOF);
|
||
create table if not exists BinaryCaches (
|
||
id integer primary key autoincrement not null,
|
||
url text unique not null,
|
||
timestamp integer not null,
|
||
storeDir text not null,
|
||
wantMassQuery integer not null,
|
||
priority integer not null
|
||
);
|
||
EOF
|
||
|
||
$dbh->do(<<EOF);
|
||
create table if not exists NARs (
|
||
cache integer not null,
|
||
storePath text not null,
|
||
url text not null,
|
||
compression text not null,
|
||
fileHash text,
|
||
fileSize integer,
|
||
narHash text,
|
||
narSize integer,
|
||
refs text,
|
||
deriver text,
|
||
system text,
|
||
timestamp integer not null,
|
||
primary key (cache, storePath),
|
||
foreign key (cache) references BinaryCaches(id) on delete cascade
|
||
);
|
||
EOF
|
||
|
||
$dbh->do(<<EOF);
|
||
create table if not exists NARExistence (
|
||
cache integer not null,
|
||
storePath text not null,
|
||
exist integer not null,
|
||
timestamp integer not null,
|
||
primary key (cache, storePath),
|
||
foreign key (cache) references BinaryCaches(id) on delete cascade
|
||
);
|
||
EOF
|
||
|
||
$dbh->do("create index if not exists NARExistenceByExistTimestamp on NARExistence (exist, timestamp)");
|
||
|
||
$queryCache = $dbh->prepare("select id, storeDir, wantMassQuery, priority from BinaryCaches where url = ?") or die;
|
||
|
||
$insertNAR = $dbh->prepare(
|
||
"insert or replace into NARs(cache, storePath, url, compression, fileHash, fileSize, narHash, " .
|
||
"narSize, refs, deriver, system, timestamp) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)") or die;
|
||
|
||
$queryNAR = $dbh->prepare("select * from NARs where cache = ? and storePath = ?") or die;
|
||
|
||
$insertNARExistence = $dbh->prepare(
|
||
"insert or replace into NARExistence(cache, storePath, exist, timestamp) values (?, ?, ?, ?)") or die;
|
||
|
||
$queryNARExistence = $dbh->prepare("select exist, timestamp from NARExistence where cache = ? and storePath = ?") or die;
|
||
|
||
$expireNARExistence = $dbh->prepare("delete from NARExistence where exist = ? and timestamp < ?") or die;
|
||
}
|
||
|
||
|
||
sub getAvailableCaches {
|
||
return if $gotCaches;
|
||
$gotCaches = 1;
|
||
|
||
sub strToList {
|
||
my ($s) = @_;
|
||
return map { s/\/+$//; $_ } split(/ /, $s);
|
||
}
|
||
|
||
my @urls = strToList($Nix::Config::config{"binary-caches"} //
|
||
($Nix::Config::storeDir eq "/nix/store" ? "http://cache.nixos.org" : ""));
|
||
|
||
my $urlsFiles = $Nix::Config::config{"binary-cache-files"}
|
||
// "$Nix::Config::stateDir/profiles/per-user/$userName/channels/binary-caches/*";
|
||
foreach my $urlFile (glob $urlsFiles) {
|
||
next unless -f $urlFile;
|
||
open FILE, "<$urlFile" or die "cannot open ‘$urlFile’\n";
|
||
my $url = <FILE>; chomp $url;
|
||
close FILE;
|
||
push @urls, strToList($url);
|
||
}
|
||
|
||
push @urls, strToList($Nix::Config::config{"extra-binary-caches"} // "");
|
||
|
||
# Allow Nix daemon users to override the binary caches to a subset
|
||
# of those listed in the config file. Note that ‘untrusted-*’
|
||
# denotes options passed by the client.
|
||
my @trustedUrls = uniq(@urls, strToList($Nix::Config::config{"trusted-binary-caches"} // ""));
|
||
|
||
if (defined $Nix::Config::config{"untrusted-binary-caches"}) {
|
||
my @untrustedUrls = strToList $Nix::Config::config{"untrusted-binary-caches"};
|
||
@urls = ();
|
||
foreach my $url (@untrustedUrls) {
|
||
die "binary cache ‘$url’ is not trusted (please add it to ‘trusted-binary-caches’ [@trustedUrls] in $Nix::Config::confDir/nix.conf)\n"
|
||
unless scalar(grep { $url eq $_ } @trustedUrls) > 0;
|
||
push @urls, $url;
|
||
}
|
||
}
|
||
|
||
my @untrustedUrls = strToList $Nix::Config::config{"untrusted-extra-binary-caches"} // "";
|
||
foreach my $url (@untrustedUrls) {
|
||
next unless scalar(grep { $url eq $_ } @trustedUrls) > 0;
|
||
push @urls, $url;
|
||
}
|
||
|
||
foreach my $url (uniq @urls) {
|
||
|
||
# FIXME: not atomic.
|
||
$queryCache->execute($url);
|
||
my $res = $queryCache->fetchrow_hashref();
|
||
if (defined $res) {
|
||
next if $res->{storeDir} ne $Nix::Config::storeDir;
|
||
push @caches, { id => $res->{id}, url => $url, wantMassQuery => $res->{wantMassQuery}, priority => $res->{priority} };
|
||
next;
|
||
}
|
||
|
||
# Get the cache info file.
|
||
my $request = addRequest(undef, $url . "/nix-cache-info");
|
||
processRequests;
|
||
|
||
if ($request->{result} != 0) {
|
||
print STDERR "could not download ‘$request->{url}’ (" .
|
||
($request->{result} != 0 ? "Curl error $request->{result}" : "HTTP status $request->{httpStatus}") . ")\n";
|
||
next;
|
||
}
|
||
|
||
my $storeDir = "/nix/store";
|
||
my $wantMassQuery = 0;
|
||
my $priority = 50;
|
||
foreach my $line (split "\n", $request->{content}) {
|
||
unless ($line =~ /^(.*): (.*)$/) {
|
||
print STDERR "bad cache info file ‘$request->{url}’\n";
|
||
return undef;
|
||
}
|
||
if ($1 eq "StoreDir") { $storeDir = $2; }
|
||
elsif ($1 eq "WantMassQuery") { $wantMassQuery = int($2); }
|
||
elsif ($1 eq "Priority") { $priority = int($2); }
|
||
}
|
||
|
||
$dbh->do("insert or replace into BinaryCaches(url, timestamp, storeDir, wantMassQuery, priority) values (?, ?, ?, ?, ?)",
|
||
{}, $url, time(), $storeDir, $wantMassQuery, $priority);
|
||
$queryCache->execute($url);
|
||
$res = $queryCache->fetchrow_hashref() or die;
|
||
next if $storeDir ne $Nix::Config::storeDir;
|
||
push @caches, { id => $res->{id}, url => $url, wantMassQuery => $wantMassQuery, priority => $priority };
|
||
}
|
||
|
||
@caches = sort { $a->{priority} <=> $b->{priority} } @caches;
|
||
|
||
expireNegative();
|
||
}
|
||
|
||
|
||
sub shouldCache {
|
||
my ($url) = @_;
|
||
return $cacheFileURLs || $url !~ /^file:/;
|
||
}
|
||
|
||
|
||
sub processNARInfo {
|
||
my ($storePath, $cache, $request) = @_;
|
||
|
||
if ($request->{result} != 0) {
|
||
if ($request->{result} != 37 && $request->{httpStatus} != 404 && $request->{httpStatus} != 403) {
|
||
print STDERR "could not download ‘$request->{url}’ (" .
|
||
($request->{result} != 0 ? "Curl error $request->{result}" : "HTTP status $request->{httpStatus}") . ")\n";
|
||
} else {
|
||
$insertNARExistence->execute($cache->{id}, basename($storePath), 0, time())
|
||
if shouldCache $request->{url};
|
||
}
|
||
return undef;
|
||
}
|
||
|
||
my $narInfo = parseNARInfo($storePath, $request->{content});
|
||
return undef unless defined $narInfo;
|
||
|
||
# Cache the result.
|
||
$insertNAR->execute(
|
||
$cache->{id}, basename($storePath), $narInfo->{url}, $narInfo->{compression},
|
||
$narInfo->{fileHash}, $narInfo->{fileSize}, $narInfo->{narHash}, $narInfo->{narSize},
|
||
join(" ", @{$narInfo->{refs}}), $narInfo->{deriver}, $narInfo->{system}, time())
|
||
if shouldCache $request->{url};
|
||
|
||
return $narInfo;
|
||
}
|
||
|
||
|
||
sub getCachedInfoFrom {
|
||
my ($storePath, $cache) = @_;
|
||
|
||
$queryNAR->execute($cache->{id}, basename($storePath));
|
||
my $res = $queryNAR->fetchrow_hashref();
|
||
return undef unless defined $res;
|
||
|
||
return
|
||
{ url => $res->{url}
|
||
, compression => $res->{compression}
|
||
, fileHash => $res->{fileHash}
|
||
, fileSize => $res->{fileSize}
|
||
, narHash => $res->{narHash}
|
||
, narSize => $res->{narSize}
|
||
, refs => [ split " ", $res->{refs} ]
|
||
, deriver => $res->{deriver}
|
||
} if defined $res;
|
||
}
|
||
|
||
|
||
sub negativeHit {
|
||
my ($storePath, $cache) = @_;
|
||
$queryNARExistence->execute($cache->{id}, basename($storePath));
|
||
my $res = $queryNARExistence->fetchrow_hashref();
|
||
return defined $res && $res->{exist} == 0 && time() - $res->{timestamp} < $ttlNegativeUse;
|
||
}
|
||
|
||
|
||
sub positiveHit {
|
||
my ($storePath, $cache) = @_;
|
||
return 1 if defined getCachedInfoFrom($storePath, $cache);
|
||
$queryNARExistence->execute($cache->{id}, basename($storePath));
|
||
my $res = $queryNARExistence->fetchrow_hashref();
|
||
return defined $res && $res->{exist} == 1;
|
||
}
|
||
|
||
|
||
sub expireNegative {
|
||
return if $didExpiration;
|
||
$didExpiration = 1;
|
||
my $time = time();
|
||
# Round up to the next multiple of the TTL to ensure that we do
|
||
# expiration only once per time interval. E.g. if $ttlNegative ==
|
||
# 3600, we expire entries at most once per hour. This is
|
||
# presumably faster than expiring a few entries per request (and
|
||
# thus doing a transaction).
|
||
my $limit = (int($time / $ttlNegative) - 1) * $ttlNegative;
|
||
$expireNARExistence->execute($limit, 0);
|
||
print STDERR "expired ", $expireNARExistence->rows, " negative entries\n" if $debug;
|
||
}
|
||
|
||
|
||
sub printInfo {
|
||
my ($storePath, $info) = @_;
|
||
print "$storePath\n";
|
||
print $info->{deriver} ? "$Nix::Config::storeDir/$info->{deriver}" : "", "\n";
|
||
print scalar @{$info->{refs}}, "\n";
|
||
print "$Nix::Config::storeDir/$_\n" foreach @{$info->{refs}};
|
||
print $info->{fileSize} || 0, "\n";
|
||
print $info->{narSize} || 0, "\n";
|
||
}
|
||
|
||
|
||
sub infoUrl {
|
||
my ($binaryCacheUrl, $storePath) = @_;
|
||
my $pathHash = substr(basename($storePath), 0, 32);
|
||
my $infoUrl = "$binaryCacheUrl/$pathHash.narinfo";
|
||
}
|
||
|
||
|
||
sub printInfoParallel {
|
||
my @paths = @_;
|
||
|
||
# First print all paths for which we have cached info.
|
||
my @left;
|
||
foreach my $storePath (@paths) {
|
||
my $found = 0;
|
||
foreach my $cache (@caches) {
|
||
my $info = getCachedInfoFrom($storePath, $cache);
|
||
if (defined $info) {
|
||
printInfo($storePath, $info);
|
||
$found = 1;
|
||
last;
|
||
}
|
||
}
|
||
push @left, $storePath if !$found;
|
||
}
|
||
|
||
return if scalar @left == 0;
|
||
|
||
foreach my $cache (@caches) {
|
||
|
||
my @left2;
|
||
%requests = ();
|
||
foreach my $storePath (@left) {
|
||
if (negativeHit($storePath, $cache)) {
|
||
push @left2, $storePath;
|
||
next;
|
||
}
|
||
addRequest($storePath, infoUrl($cache->{url}, $storePath));
|
||
}
|
||
|
||
processRequests;
|
||
|
||
foreach my $request (values %requests) {
|
||
my $info = processNARInfo($request->{storePath}, $cache, $request);
|
||
if (defined $info) {
|
||
printInfo($request->{storePath}, $info);
|
||
} else {
|
||
push @left2, $request->{storePath};
|
||
}
|
||
}
|
||
|
||
@left = @left2;
|
||
}
|
||
}
|
||
|
||
|
||
sub printSubstitutablePaths {
|
||
my @paths = @_;
|
||
|
||
# First look for paths that have cached info.
|
||
my @left;
|
||
foreach my $storePath (@paths) {
|
||
my $found = 0;
|
||
foreach my $cache (@caches) {
|
||
next unless $cache->{wantMassQuery};
|
||
if (positiveHit($storePath, $cache)) {
|
||
print "$storePath\n";
|
||
$found = 1;
|
||
last;
|
||
}
|
||
}
|
||
push @left, $storePath if !$found;
|
||
}
|
||
|
||
return if scalar @left == 0;
|
||
|
||
# For remaining paths, do HEAD requests.
|
||
foreach my $cache (@caches) {
|
||
next unless $cache->{wantMassQuery};
|
||
my @left2;
|
||
%requests = ();
|
||
foreach my $storePath (@left) {
|
||
if (negativeHit($storePath, $cache)) {
|
||
push @left2, $storePath;
|
||
next;
|
||
}
|
||
addRequest($storePath, infoUrl($cache->{url}, $storePath), 1);
|
||
}
|
||
|
||
processRequests;
|
||
|
||
foreach my $request (values %requests) {
|
||
if ($request->{result} != 0) {
|
||
if ($request->{result} != 37 && $request->{httpStatus} != 404 && $request->{httpStatus} != 403) {
|
||
print STDERR "could not check ‘$request->{url}’ (" .
|
||
($request->{result} != 0 ? "Curl error $request->{result}" : "HTTP status $request->{httpStatus}") . ")\n";
|
||
} else {
|
||
$insertNARExistence->execute($cache->{id}, basename($request->{storePath}), 0, time())
|
||
if shouldCache $request->{url};
|
||
}
|
||
push @left2, $request->{storePath};
|
||
} else {
|
||
$insertNARExistence->execute($cache->{id}, basename($request->{storePath}), 1, time())
|
||
if shouldCache $request->{url};
|
||
print "$request->{storePath}\n";
|
||
}
|
||
}
|
||
|
||
@left = @left2;
|
||
}
|
||
}
|
||
|
||
|
||
sub downloadBinary {
|
||
my ($storePath, $destPath) = @_;
|
||
|
||
foreach my $cache (@caches) {
|
||
my $info = getCachedInfoFrom($storePath, $cache);
|
||
|
||
unless (defined $info) {
|
||
next if negativeHit($storePath, $cache);
|
||
my $request = addRequest($storePath, infoUrl($cache->{url}, $storePath));
|
||
processRequests;
|
||
$info = processNARInfo($storePath, $cache, $request);
|
||
}
|
||
|
||
next unless 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;
|
||
}
|
||
my $url = "$cache->{url}/$info->{url}"; # FIXME: handle non-relative URLs
|
||
print STDERR "\n*** Downloading ‘$url’ to ‘$storePath’...\n";
|
||
checkURL $url;
|
||
if (system("$Nix::Config::curl --fail --location --insecure '$url' | $decompressor | $Nix::Config::binDir/nix-store --restore $destPath") != 0) {
|
||
warn "download of `$url' failed" . ($! ? ": $!" : "") . "\n";
|
||
next;
|
||
}
|
||
|
||
# Tell Nix about the expected hash so it can verify it.
|
||
print "$info->{narHash}\n";
|
||
|
||
print STDERR "\n";
|
||
return;
|
||
}
|
||
|
||
print STDERR "could not download ‘$storePath’ from any binary cache\n";
|
||
exit 1;
|
||
}
|
||
|
||
|
||
# Bail out right away if binary caches are disabled.
|
||
exit 0 if
|
||
($Nix::Config::config{"use-binary-caches"} // "true") eq "false" ||
|
||
($Nix::Config::config{"untrusted-use-binary-caches"} // "true") eq "false";
|
||
print "\n";
|
||
flush STDOUT;
|
||
|
||
initCache();
|
||
|
||
|
||
if ($ARGV[0] eq "--query") {
|
||
|
||
while (<STDIN>) {
|
||
getAvailableCaches;
|
||
chomp;
|
||
my ($cmd, @args) = split " ", $_;
|
||
|
||
if ($cmd eq "have") {
|
||
print STDERR "checking binary caches for existence of @args\n" if $debug;
|
||
printSubstitutablePaths(@args);
|
||
print "\n";
|
||
}
|
||
|
||
elsif ($cmd eq "info") {
|
||
print STDERR "checking binary caches for info on @args\n" if $debug;
|
||
printInfoParallel(@args);
|
||
print "\n";
|
||
}
|
||
|
||
else { die "unknown command `$cmd'"; }
|
||
|
||
flush STDOUT;
|
||
}
|
||
|
||
}
|
||
|
||
elsif ($ARGV[0] eq "--substitute") {
|
||
my $storePath = $ARGV[1] or die;
|
||
my $destPath = $ARGV[2] or die;
|
||
getAvailableCaches;
|
||
downloadBinary($storePath, $destPath);
|
||
}
|
||
|
||
else {
|
||
die;
|
||
}
|