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Binary caches: use a better key

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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.
This commit is contained in:
Eelco Dolstra 2012-07-02 12:42:58 -04:00
parent 6b1e671ac6
commit 6ec7460af1
2 changed files with 13 additions and 8 deletions
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15
scripts/download-from-binary-cache.pl.in
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@ -1,6 +1,7 @@
#! @perl@ -w @perlFlags@ #! @perl@ -w @perlFlags@
use strict; use strict;
use File::Basename;
use Nix::Config; use Nix::Config;
use Nix::Store; use Nix::Store;
@ -12,9 +13,11 @@ sub getInfoFrom {
my ($storePath, $pathHash, $binaryCacheUrl) = @_; my ($storePath, $pathHash, $binaryCacheUrl) = @_;
my $infoUrl = "$binaryCacheUrl/$pathHash.narinfo"; my $infoUrl = "$binaryCacheUrl/$pathHash.narinfo";
#print STDERR "checking $infoUrl...\n"; #print STDERR "checking $infoUrl...\n";
my $s = `$Nix::Config::curl --fail --silent --location ${infoUrl}`; my $s = `$Nix::Config::curl --fail --silent --location $infoUrl`;
if ($? != 0) { if ($? != 0) {
#print STDERR "GOT CURL REPLY ", $? >> 8, "\n"; my $status = $? >> 8;
print STDERR "could not download ‘$infoUrl’ (curl returned status ", $? >> 8, ")\n"
if $status != 22 && $status != 37;
return undef; return undef;
} }
my ($storePath2, $url, $compression, $fileHash, $fileSize, $narHash, $narSize, $deriver); my ($storePath2, $url, $compression, $fileHash, $fileSize, $narHash, $narSize, $deriver);
@ -51,7 +54,7 @@ sub getInfoFrom {
sub getInfo { sub getInfo {
my ($storePath) = @_; my ($storePath) = @_;
my $pathHash = hashString("sha256", 1, $storePath); my $pathHash = substr(basename($storePath), 0, 32);
cache: foreach my $binaryCacheUrl (@binaryCacheUrls) { cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl); my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
@ -65,7 +68,7 @@ sub getInfo {
sub downloadBinary { sub downloadBinary {
my ($storePath) = @_; my ($storePath) = @_;
my $pathHash = hashString("sha256", 1, $storePath); my $pathHash = substr(basename($storePath), 0, 32);
cache: foreach my $binaryCacheUrl (@binaryCacheUrls) { cache: foreach my $binaryCacheUrl (@binaryCacheUrls) {
my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl); my $info = getInfoFrom($storePath, $pathHash, $binaryCacheUrl);
@ -124,7 +127,9 @@ if ($ARGV[0] eq "--query") {
elsif ($ARGV[0] eq "--substitute") { elsif ($ARGV[0] eq "--substitute") {
my $storePath = $ARGV[1] or die; my $storePath = $ARGV[1] or die;
exit 1 unless downloadBinary($storePath); if (!downloadBinary($storePath)) {
print STDERR "could not download ‘$storePath’ from any binary cache\n";
}
} }
else { else {

6
scripts/nix-push.in
View file

@ -218,12 +218,12 @@ for (my $n = 0; $n < scalar @storePaths; $n++) {
} }
} }
my $infoName = hashString("sha256", 1, $storePath); my $pathHash = substr(basename($storePath), 0, 32);
if ($localCopy) { if ($localCopy) {
my $dst = "$localArchivesDir/$infoName.narinfo"; my $dst = "$localArchivesDir/$pathHash.narinfo";
if ($force || ! -f $dst) { if ($force || ! -f $dst) {
my $tmp = "$localArchivesDir/.tmp.$$.$infoName"; my $tmp = "$localArchivesDir/.tmp.$$.$pathHash.narinfo";
open INFO, ">$tmp" or die; open INFO, ">$tmp" or die;
print INFO "$info" or die; print INFO "$info" or die;
close INFO or die; close INFO or die;