forked from lix-project/lix
![Eelco Dolstra](/assets/img/avatar_default.png)
need any info on substitutable paths, we just call the substituters (such as download-using-manifests.pl) directly. This means that it's no longer necessary for nix-pull to register substitutes or for nix-channel to clear them, which makes those operations much faster (NIX-95). Also, we don't have to worry about keeping nix-pull manifests (in /nix/var/nix/manifests) and the database in sync with each other. The downside is that there is some overhead in calling an external program to get the substitutes info. For instance, "nix-env -qas" takes a bit longer. Abolishing the substitutes table also makes the logic in local-store.cc simpler, as we don't need to store info for invalid paths. On the downside, you cannot do things like "nix-store -qR" on a substitutable but invalid path (but nobody did that anyway). * Never catch interrupts (the Interrupted exception).
111 lines
2.9 KiB
Plaintext
111 lines
2.9 KiB
Plaintext
#! @perl@ -w -I@libexecdir@/nix
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use strict;
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use File::Temp qw(tempdir);
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use readmanifest;
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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 $binDir = $ENV{"NIX_BIN_DIR"};
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$binDir = "@bindir@" unless defined $binDir;
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my $libexecDir = $ENV{"NIX_LIBEXEC_DIR"};
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$libexecDir = "@libexecdir@" unless defined $libexecDir;
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my $stateDir = $ENV{"NIX_STATE_DIR"};
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$stateDir = "@localstatedir@/nix" unless defined $stateDir;
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my $storeDir = $ENV{"NIX_STORE_DIR"};
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$storeDir = "@storedir@" unless defined $storeDir;
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# Prevent access problems in shared-stored installations.
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umask 0022;
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# Process the URLs specified on the command line.
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my %narFiles;
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my %localPaths;
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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, $path) = `@bindir@/nix-prefetch-url '$url'`;
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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 $manifest;
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# First see if a bzipped manifest is available.
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if (system("@curl@ --fail --silent --head '$url'.bz2 > /dev/null") == 0) {
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print "obtaining 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("@bunzip2@ < $bzipped > $manifest") == 0
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or die "cannot decompress manifest";
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$manifest = (`$binDir/nix-store --add $manifest`
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or die "cannot copy $manifest to the store");
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chomp $manifest;
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}
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# Otherwise, just get the uncompressed manifest.
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else {
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print "obtaining list of Nix archives at `$url'...\n";
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$manifest = downloadFile $url;
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}
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if (readManifest($manifest, \%narFiles, \%localPaths, \%patches) < 3) {
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die "manifest `$url' is too old (i.e., for Nix <= 0.7)\n";
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}
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if ($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 $hash = `$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 $finalPath = "$stateDir/manifests/$baseName-$hash.nixmanifest";
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system("@coreutils@/ln", "-sfn", "$manifest", "$finalPath") == 0
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or die "cannot link `$finalPath to `$manifest'";
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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 $size = scalar (keys %narFiles) + scalar (keys %localPaths);
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print "$size store paths in manifest\n";
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