0837348049
If we don't follow redirects, we might think that MANIFEST.bz2 exists just because the HEAD request succeeds on the redirector URI.
110 lines
2.9 KiB
Text
Executable file
110 lines
2.9 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 $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 $gcRootsDir = "$Nix::Config::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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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 --location --head '$url'.bz2 > /dev/null") == 0) {
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print "fetching list of Nix archives at `$url.bz2'...\n";
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$manifest = downloadFile "$url.bz2";
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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 $baseName = "unnamed";
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if ($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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# No-op, no longer supported.
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} else {
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processURL $url;
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}
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}
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# Update the cache.
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updateManifestDB();
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