forked from lix-project/lix
nix-channel: Use binary caches advertised by channels
Channels can now advertise a binary cache by creating a file <channel-url>/binary-cache-url. The channel unpacker puts these in its "binary-caches" subdirectory. Thus, the URLS of the binary caches for the channels added by root appear in /nix/var/nix/profiles/per-user/eelco/channels/binary-caches/*. The binary cache substituter reads these and adds them to the list of binary caches.
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@ -6,19 +6,23 @@ let
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''
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mkdir $out
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cd $out
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${bzip2} -d < $src | ${tar} xf - --warning=no-timestamp
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${bzip2} -d < $src | ${tar} xf - --warning=no-timestamp
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mv * $out/$channelName
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if [ -n "$binaryCacheURL" ]; then
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mkdir $out/binary-caches
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echo -n "$binaryCacheURL" > $out/binary-caches/$channelName
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fi
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'';
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in
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{ name, channelName, src }:
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{ name, channelName, src, binaryCacheURL ? "" }:
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derivation {
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system = builtins.currentSystem;
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builder = shell;
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args = [ "-e" builder ];
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inherit name channelName src;
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inherit name channelName src binaryCacheURL;
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PATH = "${nixBinDir}:${coreutils}";
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@ -329,6 +329,18 @@ build-use-chroot = /dev /proc /bin</programlisting>
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</varlistentry>
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<varlistentry><term><literal>binary-caches-files</literal></term>
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<listitem><para>A list of names of files that will be read to
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obtain additional binary cache URLs. The default is
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<literal>/nix/var/nix/profiles/per-user/root/channels/binary-caches/*</literal>,
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which ensures that Nix will use the binary caches corresponding to
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the channels installed by root. Do not set this option to read
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files created by untrusted users!</para></listitem>
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</varlistentry>
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<varlistentry><term><literal>trusted-binary-caches</literal></term>
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<listitem><para>A list of URLs of binary caches, separated by
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@ -176,6 +176,16 @@ sub getAvailableCaches {
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($Nix::Config::config{"binary-caches"}
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// ($Nix::Config::storeDir eq "/nix/store" ? "http://nixos.org/binary-cache" : ""));
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my $urlsFiles = $Nix::Config::config{"binary-cache-files"}
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// "/nix/var/nix/profiles/per-user/root/channels/binary-caches/*";
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foreach my $urlFile (glob $urlsFiles) {
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next unless -f $urlFile;
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open FILE, "<$urlFile" or die "cannot open ‘$urlFile’\n";
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my $url = <FILE>; chomp $url;
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close FILE;
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push @urls, strToList($url);
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}
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# Allow Nix daemon users to override the binary caches to a subset
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# of those listed in the config file. Note that ‘untrusted-*’
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# denotes options passed by the client.
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@ -22,7 +22,7 @@ my $nixDefExpr = "$home/.nix-defexpr";
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my $userName = getpwuid($<) or die "cannot figure out user name";
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my $profile = "$Nix::Config::stateDir/profiles/per-user/$userName/channels";
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mkpath(dirname $profile, 0, 0755);
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my %channels;
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@ -77,20 +77,14 @@ sub removeChannel {
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# channels.
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sub update {
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my @channelNames = @_;
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readChannels;
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# Create the manifests directory if it doesn't exist.
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mkdir $manifestDir, 0755 unless -e $manifestDir;
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# Do we have write permission to the manifests directory?
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die "$0: you do not have write permission to `$manifestDir'!\n" unless -W $manifestDir;
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# Download each channel.
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my $exprs = "";
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foreach my $name (keys %channels) {
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next if scalar @channelNames > 0 && ! grep { $_ eq $name } @{channelNames};
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my $url = $channels{$name};
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my $origUrl = "$url/MANIFEST";
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@ -101,11 +95,20 @@ sub update {
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die "$0: unable to check `$url'\n" if $? != 0;
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$headers =~ s/\r//g;
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$url = $1 if $headers =~ /^Location:\s*(.*)\s*$/m;
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# Pull the channel manifest.
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$ENV{'NIX_ORIG_URL'} = $origUrl;
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system("$Nix::Config::binDir/nix-pull", "--skip-wrong-store", "$url/MANIFEST") == 0
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or die "cannot pull manifest from `$url'\n";
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# Check if the channel advertises a binary cache.
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my $binaryCacheURL = `$Nix::Config::curl --silent '$url'/binary-cache-url`;
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my $extraAttrs = "";
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if ($? == 0 && $binaryCacheURL ne "") {
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$extraAttrs .= "binaryCacheURL = \"$binaryCacheURL\"; ";
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} else {
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# No binary cache, so pull the channel manifest.
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mkdir $manifestDir, 0755 unless -e $manifestDir;
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die "$0: you do not have write permission to `$manifestDir'!\n" unless -W $manifestDir;
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$ENV{'NIX_ORIG_URL'} = $origUrl;
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system("$Nix::Config::binDir/nix-pull", "--skip-wrong-store", "$url/MANIFEST") == 0
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or die "cannot pull manifest from `$url'\n";
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}
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# Download the channel tarball.
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my $fullURL = "$url/nixexprs.tar.bz2";
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@ -120,7 +123,7 @@ sub update {
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my $cname = $name;
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$cname .= $1 if basename($url) =~ /(-\d.*)$/;
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$exprs .= "'f: f { name = \"$cname\"; channelName = \"$name\"; src = builtins.storePath \"$path\"; }' ";
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$exprs .= "'f: f { name = \"$cname\"; channelName = \"$name\"; src = builtins.storePath \"$path\"; $extraAttrs }' ";
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}
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# Unpack the channel tarballs into the Nix store and install them
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@ -189,7 +192,7 @@ while (scalar @ARGV) {
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update(@ARGV);
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last;
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}
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elsif ($arg eq "--help") {
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usageError;
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}
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@ -198,7 +201,7 @@ while (scalar @ARGV) {
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print "nix-channel (Nix) $Nix::Config::version\n";
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exit 0;
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}
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else {
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die "unknown argument `$arg'; try `--help'";
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}
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