mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-23 14:36:16 +02:00
140 lines
4 KiB
Text
Executable file
140 lines
4 KiB
Text
Executable file
#! @perl@ -w @perlFlags@
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use strict;
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use File::Temp qw(tempdir);
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use Nix::Config;
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use Nix::Manifest;
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my $tmpDir = tempdir("nix-pull.XXXXXX", CLEANUP => 1, TMPDIR => 1)
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or die "cannot create a temporary directory";
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my $libexecDir = ($ENV{"NIX_LIBEXEC_DIR"} or "@libexecdir@");
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my $storeDir = ($ENV{"NIX_STORE_DIR"} or "@storedir@");
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my $stateDir = ($ENV{"NIX_STATE_DIR"} or "@localstatedir@/nix");
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my $manifestDir = $Nix::Config::manifestDir;
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# Prevent access problems in shared-stored installations.
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umask 0022;
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# Create the manifests directory if it doesn't exist.
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if (! -e $manifestDir) {
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mkdir $manifestDir, 0755 or die "cannot create directory `$manifestDir'";
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}
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# Make sure that the manifests directory is scanned for GC roots.
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my $gcRootsDir = "$stateDir/gcroots";
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my $manifestDirLink = "$gcRootsDir/manifests";
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if (! -l $manifestDirLink) {
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symlink($manifestDir, $manifestDirLink) or die "cannot create symlink `$manifestDirLink'";
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}
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# Process the URLs specified on the command line.
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my %narFiles;
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my %patches;
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my $skipWrongStore = 0;
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sub downloadFile {
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my $url = shift;
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$ENV{"PRINT_PATH"} = 1;
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$ENV{"QUIET"} = 1;
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my ($dummy, $path) = `$Nix::Config::binDir/nix-prefetch-url '$url'`;
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die "cannot fetch `$url'" if $? != 0;
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die "nix-prefetch-url did not return a path" unless defined $path;
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chomp $path;
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return $path;
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}
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sub processURL {
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my $url = shift;
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$url =~ s/\/$//;
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my $manifest;
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# First see if a bzipped manifest is available.
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if (system("$Nix::Config::curl --fail --silent --head '$url'.bz2 > /dev/null") == 0) {
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print "fetching list of Nix archives at `$url.bz2'...\n";
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my $bzipped = downloadFile "$url.bz2";
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$manifest = "$tmpDir/MANIFEST";
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system("$Nix::Config::bzip2 -d < $bzipped > $manifest") == 0
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or die "cannot decompress manifest";
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$manifest = (`$Nix::Config::binDir/nix-store --add $manifest`
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or die "cannot copy $manifest to the store");
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chomp $manifest;
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}
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# Otherwise, just get the uncompressed manifest.
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else {
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print "fetching list of Nix archives at `$url'...\n";
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$manifest = downloadFile $url;
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}
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my $version = readManifest($manifest, \%narFiles, \%patches);
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die "`$url' is not a manifest or it is too old (i.e., for Nix <= 0.7)\n" if $version < 3;
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die "manifest `$url' is too new\n" if $version >= 5;
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if ($skipWrongStore) {
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foreach my $path (keys %narFiles) {
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if (substr($path, 0, length($storeDir) + 1) ne "$storeDir/") {
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print STDERR "warning: manifest `$url' assumes a Nix store at a different location than $storeDir, skipping...\n";
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exit 0;
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}
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}
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}
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my $baseName = "unnamed";
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if ($url =~ /\/([^\/]+)\/[^\/]+$/) { # get the forelast component
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$baseName = $1;
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}
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my $hash = `$Nix::Config::binDir/nix-hash --flat '$manifest'`
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or die "cannot hash `$manifest'";
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chomp $hash;
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my $urlFile = "$manifestDir/$baseName-$hash.url";
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open URL, ">$urlFile" or die "cannot create `$urlFile'";
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print URL "$url";
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close URL;
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my $finalPath = "$manifestDir/$baseName-$hash.nixmanifest";
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unlink $finalPath if -e $finalPath;
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symlink("$manifest", "$finalPath")
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or die "cannot link `$finalPath to `$manifest'";
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# Delete all old manifests downloaded from this URL.
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for my $urlFile2 (glob "$manifestDir/*.url") {
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next if $urlFile eq $urlFile2;
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open URL, "<$urlFile2" or die;
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my $url2 = <URL>;
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chomp $url2;
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close URL;
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next unless $url eq $url2;
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my $base = $urlFile2; $base =~ s/.url$//;
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unlink "${base}.url";
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unlink "${base}.nixmanifest";
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}
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}
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while (@ARGV) {
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my $url = shift @ARGV;
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if ($url eq "--skip-wrong-store") {
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$skipWrongStore = 1;
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} else {
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processURL $url;
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}
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}
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my $size = scalar (keys %narFiles);
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print "$size store paths in manifest\n";
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