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lix/perl/lib/Nix/Manifest.pm
Eelco Dolstra 867967265b 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Manifests have been superseded by binary caches for years.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.
2016-04-11 16:20:15 +02:00

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package Nix::Manifest;
use utf8;
use strict;
use DBI;
use DBD::SQLite;
use Cwd;
use File::stat;
use File::Path;
use Fcntl ':flock';
use MIME::Base64;
use Nix::Config;
use Nix::Store;
our @ISA = qw(Exporter);
our @EXPORT = qw(readManifest writeManifest addPatch parseNARInfo fingerprintPath);
sub addNAR {
my ($narFiles, $storePath, $info) = @_;
$$narFiles{$storePath} = []
unless defined $$narFiles{$storePath};
my $narFileList = $$narFiles{$storePath};
my $found = 0;
foreach my $narFile (@{$narFileList}) {
$found = 1 if $narFile->{url} eq $info->{url};
}
push @{$narFileList}, $info if !$found;
}
sub addPatch {
my ($patches, $storePath, $patch) = @_;
$$patches{$storePath} = []
unless defined $$patches{$storePath};
my $patchList = $$patches{$storePath};
my $found = 0;
foreach my $patch2 (@{$patchList}) {
$found = 1 if
$patch2->{url} eq $patch->{url} &&
$patch2->{basePath} eq $patch->{basePath};
}
push @{$patchList}, $patch if !$found;
return !$found;
}
sub readManifest_ {
my ($manifest, $addNAR, $addPatch) = @_;
# Decompress the manifest if necessary.
if ($manifest =~ /\.bz2$/) {
open MANIFEST, "$Nix::Config::bzip2 -d < $manifest |"
or die "cannot decompress $manifest: $!";
} else {
open MANIFEST, "<$manifest"
or die "cannot open $manifest: $!";
}
my $inside = 0;
my $type;
my $manifestVersion = 2;
my ($storePath, $url, $hash, $size, $basePath, $baseHash, $patchType);
my ($narHash, $narSize, $references, $deriver, $copyFrom, $system, $compressionType);
while (<MANIFEST>) {
chomp;
s/\#.*$//g;
next if (/^$/);
if (!$inside) {
if (/^\s*(\w*)\s*\{$/) {
$type = $1;
$type = "narfile" if $type eq "";
$inside = 1;
undef $storePath;
undef $url;
undef $hash;
undef $size;
undef $narHash;
undef $narSize;
undef $basePath;
undef $baseHash;
undef $patchType;
undef $system;
$references = "";
$deriver = "";
$compressionType = "bzip2";
}
} else {
if (/^\}$/) {
$inside = 0;
if ($type eq "narfile") {
&$addNAR($storePath,
{ url => $url, hash => $hash, size => $size
, narHash => $narHash, narSize => $narSize
, references => $references
, deriver => $deriver
, system => $system
, compressionType => $compressionType
});
}
elsif ($type eq "patch") {
&$addPatch($storePath,
{ url => $url, hash => $hash, size => $size
, basePath => $basePath, baseHash => $baseHash
, narHash => $narHash, narSize => $narSize
, patchType => $patchType
});
}
}
elsif (/^\s*StorePath:\s*(\/\S+)\s*$/) { $storePath = $1; }
elsif (/^\s*CopyFrom:\s*(\/\S+)\s*$/) { $copyFrom = $1; }
elsif (/^\s*Hash:\s*(\S+)\s*$/) { $hash = $1; }
elsif (/^\s*URL:\s*(\S+)\s*$/) { $url = $1; }
elsif (/^\s*Compression:\s*(\S+)\s*$/) { $compressionType = $1; }
elsif (/^\s*Size:\s*(\d+)\s*$/) { $size = $1; }
elsif (/^\s*BasePath:\s*(\/\S+)\s*$/) { $basePath = $1; }
elsif (/^\s*BaseHash:\s*(\S+)\s*$/) { $baseHash = $1; }
elsif (/^\s*Type:\s*(\S+)\s*$/) { $patchType = $1; }
elsif (/^\s*NarHash:\s*(\S+)\s*$/) { $narHash = $1; }
elsif (/^\s*NarSize:\s*(\d+)\s*$/) { $narSize = $1; }
elsif (/^\s*References:\s*(.*)\s*$/) { $references = $1; }
elsif (/^\s*Deriver:\s*(\S+)\s*$/) { $deriver = $1; }
elsif (/^\s*ManifestVersion:\s*(\d+)\s*$/) { $manifestVersion = $1; }
elsif (/^\s*System:\s*(\S+)\s*$/) { $system = $1; }
# Compatibility;
elsif (/^\s*NarURL:\s*(\S+)\s*$/) { $url = $1; }
elsif (/^\s*MD5:\s*(\S+)\s*$/) { $hash = "md5:$1"; }
}
}
close MANIFEST;
return $manifestVersion;
}
sub readManifest {
my ($manifest, $narFiles, $patches) = @_;
readManifest_($manifest,
sub { addNAR($narFiles, @_); },
sub { addPatch($patches, @_); } );
}
sub writeManifest {
my ($manifest, $narFiles, $patches, $noCompress) = @_;
open MANIFEST, ">$manifest.tmp"; # !!! check exclusive
print MANIFEST "version {\n";
print MANIFEST " ManifestVersion: 3\n";
print MANIFEST "}\n";
foreach my $storePath (sort (keys %{$narFiles})) {
my $narFileList = $$narFiles{$storePath};
foreach my $narFile (@{$narFileList}) {
print MANIFEST "{\n";
print MANIFEST " StorePath: $storePath\n";
print MANIFEST " NarURL: $narFile->{url}\n";
print MANIFEST " Compression: $narFile->{compressionType}\n";
print MANIFEST " Hash: $narFile->{hash}\n" if defined $narFile->{hash};
print MANIFEST " Size: $narFile->{size}\n" if defined $narFile->{size};
print MANIFEST " NarHash: $narFile->{narHash}\n";
print MANIFEST " NarSize: $narFile->{narSize}\n" if $narFile->{narSize};
print MANIFEST " References: $narFile->{references}\n"
if defined $narFile->{references} && $narFile->{references} ne "";
print MANIFEST " Deriver: $narFile->{deriver}\n"
if defined $narFile->{deriver} && $narFile->{deriver} ne "";
print MANIFEST " System: $narFile->{system}\n" if defined $narFile->{system};
print MANIFEST "}\n";
}
}
foreach my $storePath (sort (keys %{$patches})) {
my $patchList = $$patches{$storePath};
foreach my $patch (@{$patchList}) {
print MANIFEST "patch {\n";
print MANIFEST " StorePath: $storePath\n";
print MANIFEST " NarURL: $patch->{url}\n";
print MANIFEST " Hash: $patch->{hash}\n";
print MANIFEST " Size: $patch->{size}\n";
print MANIFEST " NarHash: $patch->{narHash}\n";
print MANIFEST " NarSize: $patch->{narSize}\n" if $patch->{narSize};
print MANIFEST " BasePath: $patch->{basePath}\n";
print MANIFEST " BaseHash: $patch->{baseHash}\n";
print MANIFEST " Type: $patch->{patchType}\n";
print MANIFEST "}\n";
}
}
close MANIFEST;
rename("$manifest.tmp", $manifest)
or die "cannot rename $manifest.tmp: $!";
# Create a bzipped manifest.
unless (defined $noCompress) {
system("$Nix::Config::bzip2 < $manifest > $manifest.bz2.tmp") == 0
or die "cannot compress manifest";
rename("$manifest.bz2.tmp", "$manifest.bz2")
or die "cannot rename $manifest.bz2.tmp: $!";
}
}
# Return a fingerprint of a store path to be used in binary cache
# signatures. It contains the store path, the base-32 SHA-256 hash of
# the contents of the path, and the references.
sub fingerprintPath {
my ($storePath, $narHash, $narSize, $references) = @_;
die if substr($storePath, 0, length($Nix::Config::storeDir)) ne $Nix::Config::storeDir;
die if substr($narHash, 0, 7) ne "sha256:";
# Convert hash from base-16 to base-32, if necessary.
$narHash = "sha256:" . convertHash("sha256", substr($narHash, 7), 1)
if length($narHash) == 71;
die if length($narHash) != 59;
foreach my $ref (@{$references}) {
die if substr($ref, 0, length($Nix::Config::storeDir)) ne $Nix::Config::storeDir;
}
return "1;" . $storePath . ";" . $narHash . ";" . $narSize . ";" . join(",", @{$references});
}
# Parse a NAR info file.
sub parseNARInfo {
my ($storePath, $content, $requireValidSig, $location) = @_;
my ($storePath2, $url, $fileHash, $fileSize, $narHash, $narSize, $deriver, $system, $sig);
my $compression = "bzip2";
my @refs;
foreach my $line (split "\n", $content) {
return undef unless $line =~ /^(.*): (.*)$/;
if ($1 eq "StorePath") { $storePath2 = $2; }
elsif ($1 eq "URL") { $url = $2; }
elsif ($1 eq "Compression") { $compression = $2; }
elsif ($1 eq "FileHash") { $fileHash = $2; }
elsif ($1 eq "FileSize") { $fileSize = int($2); }
elsif ($1 eq "NarHash") { $narHash = $2; }
elsif ($1 eq "NarSize") { $narSize = int($2); }
elsif ($1 eq "References") { @refs = split / /, $2; }
elsif ($1 eq "Deriver") { $deriver = $2; }
elsif ($1 eq "System") { $system = $2; }
elsif ($1 eq "Sig") { $sig = $2; }
}
return undef if $storePath ne $storePath2 || !defined $url || !defined $narHash;
my $res =
{ url => $url
, compression => $compression
, fileHash => $fileHash
, fileSize => $fileSize
, narHash => $narHash
, narSize => $narSize
, refs => [ @refs ]
, deriver => $deriver
, system => $system
};
if ($requireValidSig) {
# FIXME: might be useful to support multiple signatures per .narinfo.
if (!defined $sig) {
warn "NAR info file $location lacks a signature; ignoring\n";
return undef;
}
my ($keyName, $sig64) = split ":", $sig;
return undef unless defined $keyName && defined $sig64;
my $publicKey = $Nix::Config::binaryCachePublicKeys{$keyName};
if (!defined $publicKey) {
warn "NAR info file $location is signed by unknown key $keyName; ignoring\n";
return undef;
}
my $fingerprint;
eval {
$fingerprint = fingerprintPath(
$storePath, $narHash, $narSize,
[ map { "$Nix::Config::storeDir/$_" } @refs ]);
};
if ($@) {
warn "cannot compute fingerprint of $location; ignoring\n";
return undef;
}
if (!checkSignature($publicKey, decode_base64($sig64), $fingerprint)) {
warn "NAR info file $location has an incorrect signature; ignoring\n";
return undef;
}
$res->{signedBy} = $keyName;
}
return $res;
}
return 1;