Remove manifest support
Manifests have been superseded by binary caches for years. This also gets rid of nix-pull, nix-generate-patches and bsdiff/bspatch.
This commit is contained in:
Eelco Dolstra
parent
af4fb6ef61
commit
867967265b
37 changed files with 20 additions and 2143 deletions
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@ -7,7 +7,6 @@ $version = "@PACKAGE_VERSION@";
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$binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@";
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$libexecDir = $ENV{"NIX_LIBEXEC_DIR"} || "@libexecdir@";
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$stateDir = $ENV{"NIX_STATE_DIR"} || "@localstatedir@/nix";
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$manifestDir = $ENV{"NIX_MANIFESTS_DIR"} || "@localstatedir@/nix/manifests";
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$logDir = $ENV{"NIX_LOG_DIR"} || "@localstatedir@/log/nix";
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$confDir = $ENV{"NIX_CONF_DIR"} || "@sysconfdir@/nix";
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$storeDir = $ENV{"NIX_STORE_DIR"} || "@storedir@";
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@ -1,340 +0,0 @@
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package Nix::GeneratePatches;
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use strict;
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use File::Temp qw(tempdir);
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use File::stat;
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use Nix::Config;
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use Nix::Manifest;
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our @ISA = qw(Exporter);
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our @EXPORT = qw(generatePatches propagatePatches copyPatches);
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# Some patch generations options.
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# Max size of NAR archives to generate patches for.
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my $maxNarSize = $ENV{"NIX_MAX_NAR_SIZE"};
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$maxNarSize = 160 * 1024 * 1024 if !defined $maxNarSize;
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# If patch is bigger than this fraction of full archive, reject.
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my $maxPatchFraction = $ENV{"NIX_PATCH_FRACTION"};
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$maxPatchFraction = 0.60 if !defined $maxPatchFraction;
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my $timeLimit = $ENV{"NIX_BSDIFF_TIME_LIMIT"};
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$timeLimit = 180 if !defined $timeLimit;
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my $hashAlgo = "sha256";
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sub findOutputPaths {
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my $narFiles = shift;
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my %outPaths;
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foreach my $p (keys %{$narFiles}) {
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# Ignore derivations.
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next if ($p =~ /\.drv$/);
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# Ignore builders (too much ambiguity -- they're all called
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# `builder.sh').
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next if ($p =~ /\.sh$/);
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next if ($p =~ /\.patch$/);
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# Don't bother including tar files etc.
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next if ($p =~ /\.tar$/ || $p =~ /\.tar\.(gz|bz2|Z|lzma|xz)$/ || $p =~ /\.zip$/ || $p =~ /\.bin$/ || $p =~ /\.tgz$/ || $p =~ /\.rpm$/ || $p =~ /cvs-export$/ || $p =~ /fetchhg$/);
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$outPaths{$p} = 1;
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}
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return %outPaths;
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}
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sub getNameVersion {
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my $p = shift;
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$p =~ /\/[0-9a-z]+((?:-[a-zA-Z][^\/-]*)+)([^\/]*)$/;
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my $name = $1;
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my $version = $2;
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return undef unless defined $name && defined $version;
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$name =~ s/^-//;
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$version =~ s/^-//;
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return ($name, $version);
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}
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# A quick hack to get a measure of the `distance' between two
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# versions: it's just the position of the first character that differs
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# (or 999 if they are the same).
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sub versionDiff {
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my $s = shift;
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my $t = shift;
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my $i;
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return 999 if $s eq $t;
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for ($i = 0; $i < length $s; $i++) {
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return $i if $i >= length $t or
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substr($s, $i, 1) ne substr($t, $i, 1);
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}
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return $i;
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}
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sub getNarBz2 {
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my $narPath = shift;
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my $narFiles = shift;
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my $storePath = shift;
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my $narFileList = $$narFiles{$storePath};
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die "missing path $storePath" unless defined $narFileList;
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my $narFile = @{$narFileList}[0];
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die unless defined $narFile;
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$narFile->{url} =~ /\/([^\/]+)$/;
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die unless defined $1;
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return "$narPath/$1";
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}
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sub containsPatch {
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my $patches = shift;
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my $storePath = shift;
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my $basePath = shift;
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my $patchList = $$patches{$storePath};
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return 0 if !defined $patchList;
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my $found = 0;
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foreach my $patch (@{$patchList}) {
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# !!! baseHash might differ
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return 1 if $patch->{basePath} eq $basePath;
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}
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return 0;
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}
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sub generatePatches {
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my ($srcNarFiles, $dstNarFiles, $srcPatches, $dstPatches, $narPath, $patchesPath, $patchesURL, $tmpDir) = @_;
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my %srcOutPaths = findOutputPaths $srcNarFiles;
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my %dstOutPaths = findOutputPaths $dstNarFiles;
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# For each output path in the destination, see if we need to / can
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# create a patch.
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print STDERR "creating patches...\n";
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foreach my $p (keys %dstOutPaths) {
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# If exactly the same path already exists in the source, skip it.
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next if defined $srcOutPaths{$p};
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print " $p\n";
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# If not, then we should find the paths in the source that are
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# `most' likely to be present on a system that wants to
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# install this path.
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(my $name, my $version) = getNameVersion $p;
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next unless defined $name && defined $version;
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my @closest = ();
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my $closestVersion;
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my $minDist = -1; # actually, larger means closer
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# Find all source paths with the same name.
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foreach my $q (keys %srcOutPaths) {
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(my $name2, my $version2) = getNameVersion $q;
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next unless defined $name2 && defined $version2;
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if ($name eq $name2) {
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my $srcSystem = @{$$dstNarFiles{$p}}[0]->{system};
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my $dstSystem = @{$$srcNarFiles{$q}}[0]->{system};
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if (defined $srcSystem && defined $dstSystem && $srcSystem ne $dstSystem) {
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print " SKIPPING $q due to different systems ($srcSystem vs. $dstSystem)\n";
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next;
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}
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# If the sizes differ too much, then skip. This
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# disambiguates between, e.g., a real component and a
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# wrapper component (cf. Firefox in Nixpkgs).
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my $srcSize = @{$$srcNarFiles{$q}}[0]->{size};
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my $dstSize = @{$$dstNarFiles{$p}}[0]->{size};
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my $ratio = $srcSize / $dstSize;
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$ratio = 1 / $ratio if $ratio < 1;
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# print " SIZE $srcSize $dstSize $ratio $q\n";
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if ($ratio >= 3) {
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print " SKIPPING $q due to size ratio $ratio ($srcSize vs. $dstSize)\n";
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next;
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}
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# If there are multiple matching names, include the
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# ones with the closest version numbers.
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my $dist = versionDiff $version, $version2;
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if ($dist > $minDist) {
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$minDist = $dist;
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@closest = ($q);
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$closestVersion = $version2;
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} elsif ($dist == $minDist) {
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push @closest, $q;
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}
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}
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}
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if (scalar(@closest) == 0) {
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print " NO BASE: $p\n";
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next;
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}
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foreach my $closest (@closest) {
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# Generate a patch between $closest and $p.
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print STDERR " $p <- $closest\n";
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# If the patch already exists, skip it.
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if (containsPatch($srcPatches, $p, $closest) ||
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containsPatch($dstPatches, $p, $closest))
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{
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print " skipping, already exists\n";
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next;
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}
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my $srcNarBz2 = getNarBz2 $narPath, $srcNarFiles, $closest;
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my $dstNarBz2 = getNarBz2 $narPath, $dstNarFiles, $p;
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if (! -f $srcNarBz2) {
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warn "patch source archive $srcNarBz2 is missing\n";
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next;
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}
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system("$Nix::Config::bzip2 -d < $srcNarBz2 > $tmpDir/A") == 0
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or die "cannot unpack $srcNarBz2";
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if (stat("$tmpDir/A")->size >= $maxNarSize) {
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print " skipping, source is too large\n";
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next;
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}
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system("$Nix::Config::bzip2 -d < $dstNarBz2 > $tmpDir/B") == 0
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or die "cannot unpack $dstNarBz2";
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if (stat("$tmpDir/B")->size >= $maxNarSize) {
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print " skipping, destination is too large\n";
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next;
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}
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my $time1 = time();
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my $res = system("ulimit -t $timeLimit; $Nix::Config::libexecDir/nix/bsdiff $tmpDir/A $tmpDir/B $tmpDir/DIFF");
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my $time2 = time();
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if ($res) {
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warn "binary diff computation aborted after ", $time2 - $time1, " seconds\n";
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next;
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}
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my $baseHash = `$Nix::Config::binDir/nix-hash --flat --type $hashAlgo --base32 $tmpDir/A` or die;
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chomp $baseHash;
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my $narHash = `$Nix::Config::binDir/nix-hash --flat --type $hashAlgo --base32 $tmpDir/B` or die;
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chomp $narHash;
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my $narDiffHash = `$Nix::Config::binDir/nix-hash --flat --type $hashAlgo --base32 $tmpDir/DIFF` or die;
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chomp $narDiffHash;
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my $narDiffSize = stat("$tmpDir/DIFF")->size;
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my $dstNarBz2Size = stat($dstNarBz2)->size;
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print " size $narDiffSize; full size $dstNarBz2Size; ", $time2 - $time1, " seconds\n";
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if ($narDiffSize >= $dstNarBz2Size) {
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print " rejecting; patch bigger than full archive\n";
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next;
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}
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if ($narDiffSize / $dstNarBz2Size >= $maxPatchFraction) {
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print " rejecting; patch too large relative to full archive\n";
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next;
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}
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my $finalName = "$narDiffHash.nar-bsdiff";
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if (-e "$patchesPath/$finalName") {
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print " not copying, already exists\n";
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}
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else {
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system("cp '$tmpDir/DIFF' '$patchesPath/$finalName.tmp'") == 0
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or die "cannot copy diff";
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rename("$patchesPath/$finalName.tmp", "$patchesPath/$finalName")
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or die "cannot rename $patchesPath/$finalName.tmp";
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}
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# Add the patch to the manifest.
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addPatch $dstPatches, $p,
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{ url => "$patchesURL/$finalName", hash => "$hashAlgo:$narDiffHash"
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, size => $narDiffSize, basePath => $closest, baseHash => "$hashAlgo:$baseHash"
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, narHash => "$hashAlgo:$narHash", patchType => "nar-bsdiff"
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};
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}
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}
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}
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# Propagate useful patches from $srcPatches to $dstPatches. A patch
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# is useful if it produces either paths in the $dstNarFiles or paths
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# that can be used as the base for other useful patches.
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sub propagatePatches {
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my ($srcPatches, $dstNarFiles, $dstPatches) = @_;
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print STDERR "propagating patches...\n";
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my $changed;
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do {
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# !!! we repeat this to reach the transitive closure; inefficient
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$changed = 0;
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print STDERR "loop\n";
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my %dstBasePaths;
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foreach my $q (keys %{$dstPatches}) {
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foreach my $patch (@{$$dstPatches{$q}}) {
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$dstBasePaths{$patch->{basePath}} = 1;
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}
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}
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foreach my $p (keys %{$srcPatches}) {
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my $patchList = $$srcPatches{$p};
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my $include = 0;
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# Is path $p included in the destination? If so, include
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# patches that produce it.
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$include = 1 if defined $$dstNarFiles{$p};
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# Is path $p a path that serves as a base for paths in the
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# destination? If so, include patches that produce it.
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# !!! check baseHash
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$include = 1 if defined $dstBasePaths{$p};
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if ($include) {
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foreach my $patch (@{$patchList}) {
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$changed = 1 if addPatch $dstPatches, $p, $patch;
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}
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}
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}
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} while $changed;
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}
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# Add all new patches in $srcPatches to $dstPatches.
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sub copyPatches {
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my ($srcPatches, $dstPatches) = @_;
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foreach my $p (keys %{$srcPatches}) {
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addPatch $dstPatches, $p, $_ foreach @{$$srcPatches{$p}};
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}
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}
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return 1;
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@ -13,7 +13,7 @@ use Nix::Config;
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use Nix::Store;
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our @ISA = qw(Exporter);
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our @EXPORT = qw(readManifest writeManifest updateManifestDB addPatch deleteOldManifests parseNARInfo fingerprintPath);
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our @EXPORT = qw(readManifest writeManifest addPatch parseNARInfo fingerprintPath);
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sub addNAR {
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@ -228,172 +228,6 @@ sub writeManifest {
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}
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sub updateManifestDB {
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my $manifestDir = $Nix::Config::manifestDir;
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my @manifests = glob "$manifestDir/*.nixmanifest";
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return undef if scalar @manifests == 0;
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mkpath($manifestDir);
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unlink "$manifestDir/cache.sqlite"; # remove obsolete cache
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my $dbPath = "$manifestDir/cache-v2.sqlite";
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# Open/create the database.
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our $dbh = DBI->connect("dbi:SQLite:dbname=$dbPath", "", "")
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or die "cannot open database ‘$dbPath’";
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$dbh->{RaiseError} = 1;
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$dbh->{PrintError} = 0;
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$dbh->do("pragma foreign_keys = on");
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$dbh->do("pragma synchronous = off"); # we can always reproduce the cache
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$dbh->do("pragma journal_mode = truncate");
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# Initialise the database schema, if necessary.
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$dbh->do(<<EOF);
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create table if not exists Manifests (
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id integer primary key autoincrement not null,
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path text unique not null,
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timestamp integer not null
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);
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EOF
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$dbh->do(<<EOF);
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create table if not exists NARs (
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id integer primary key autoincrement not null,
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manifest integer not null,
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storePath text not null,
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url text not null,
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compressionType text not null,
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hash text,
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size integer,
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narHash text,
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narSize integer,
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refs text,
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deriver text,
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system text,
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foreign key (manifest) references Manifests(id) on delete cascade
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);
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EOF
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$dbh->do("create index if not exists NARs_storePath on NARs(storePath)");
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$dbh->do(<<EOF);
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create table if not exists Patches (
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id integer primary key autoincrement not null,
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manifest integer not null,
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storePath text not null,
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basePath text not null,
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baseHash text not null,
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url text not null,
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hash text,
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size integer,
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narHash text,
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narSize integer,
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patchType text not null,
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foreign key (manifest) references Manifests(id) on delete cascade
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);
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EOF
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$dbh->do("create index if not exists Patches_storePath on Patches(storePath)");
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# Acquire an exclusive lock to ensure that only one process
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# updates the DB at the same time. This isn't really necessary,
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# but it prevents work duplication and lock contention in SQLite.
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my $lockFile = "$manifestDir/cache.lock";
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open MAINLOCK, ">>$lockFile" or die "unable to acquire lock ‘$lockFile’: $!\n";
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flock(MAINLOCK, LOCK_EX) or die;
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our $insertNAR = $dbh->prepare(
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"insert into NARs(manifest, storePath, url, compressionType, hash, size, narHash, " .
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"narSize, refs, deriver, system) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?)") or die;
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our $insertPatch = $dbh->prepare(
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"insert into Patches(manifest, storePath, basePath, baseHash, url, hash, " .
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"size, narHash, narSize, patchType) values (?, ?, ?, ?, ?, ?, ?, ?, ?, ?)");
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$dbh->begin_work;
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# Read each manifest in $manifestDir and add it to the database,
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# unless we've already done so on a previous run.
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my %seen;
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for my $manifestLink (@manifests) {
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my $manifest = Cwd::abs_path($manifestLink);
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next unless -f $manifest;
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my $timestamp = lstat($manifest)->mtime;
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$seen{$manifest} = 1;
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next if scalar @{$dbh->selectcol_arrayref(
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"select 1 from Manifests where path = ? and timestamp = ?",
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{}, $manifest, $timestamp)} == 1;
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print STDERR "caching $manifest...\n";
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$dbh->do("delete from Manifests where path = ?", {}, $manifest);
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$dbh->do("insert into Manifests(path, timestamp) values (?, ?)",
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{}, $manifest, $timestamp);
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our $id = $dbh->last_insert_id("", "", "", "");
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sub addNARToDB {
|
||||
my ($storePath, $narFile) = @_;
|
||||
$insertNAR->execute(
|
||||
$id, $storePath, $narFile->{url}, $narFile->{compressionType}, $narFile->{hash},
|
||||
$narFile->{size}, $narFile->{narHash}, $narFile->{narSize}, $narFile->{references},
|
||||
$narFile->{deriver}, $narFile->{system});
|
||||
};
|
||||
|
||||
sub addPatchToDB {
|
||||
my ($storePath, $patch) = @_;
|
||||
$insertPatch->execute(
|
||||
$id, $storePath, $patch->{basePath}, $patch->{baseHash}, $patch->{url},
|
||||
$patch->{hash}, $patch->{size}, $patch->{narHash}, $patch->{narSize},
|
||||
$patch->{patchType});
|
||||
};
|
||||
|
||||
my $version = readManifest_($manifest, \&addNARToDB, \&addPatchToDB);
|
||||
|
||||
if ($version < 3) {
|
||||
die "you have an old-style or corrupt manifest ‘$manifestLink’; please delete it\n";
|
||||
}
|
||||
if ($version >= 10) {
|
||||
die "manifest ‘$manifestLink’ is too new; please delete it or upgrade Nix\n";
|
||||
}
|
||||
}
|
||||
|
||||
# Removed cached information for removed manifests from the DB.
|
||||
foreach my $manifest (@{$dbh->selectcol_arrayref("select path from Manifests")}) {
|
||||
next if defined $seen{$manifest};
|
||||
$dbh->do("delete from Manifests where path = ?", {}, $manifest);
|
||||
}
|
||||
|
||||
$dbh->commit;
|
||||
|
||||
close MAINLOCK;
|
||||
|
||||
return $dbh;
|
||||
}
|
||||
|
||||
|
||||
# Delete all old manifests downloaded from a given URL.
|
||||
sub deleteOldManifests {
|
||||
my ($url, $curUrlFile) = @_;
|
||||
for my $urlFile (glob "$Nix::Config::manifestDir/*.url") {
|
||||
next if defined $curUrlFile && $urlFile eq $curUrlFile;
|
||||
open URL, "<$urlFile" or die;
|
||||
my $url2 = <URL>;
|
||||
chomp $url2;
|
||||
close URL;
|
||||
next unless $url eq $url2;
|
||||
my $base = $urlFile; $base =~ s/.url$//;
|
||||
unlink "${base}.url";
|
||||
unlink "${base}.nixmanifest";
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
# Return a fingerprint of a store path to be used in binary cache
|
||||
# signatures. It contains the store path, the base-32 SHA-256 hash of
|
||||
# the contents of the path, and the references.
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue