lix/scripts/readmanifest.pm.in
Eelco Dolstra 3259ae5811 * Properly specify the hash algorithm in the manifests, and read it
too.
* Change the default hash for nix-prefetch-url back to md5, since
  that's what we use in Nixpkgs (for now; a birthday attack is rather
  unlikely there).
2005-02-24 17:36:42 +00:00

214 lines
6.6 KiB
Perl

use strict;
sub addPatch {
my $patches = shift;
my $storePath = shift;
my $patch = shift;
$$patches{$storePath} = []
unless defined $$patches{$storePath};
my $patchList = $$patches{$storePath};
my $found = 0;
foreach my $patch2 (@{$patchList}) {
if ($patch2->{url} eq $patch->{url}) {
if ($patch2->{hash} eq $patch->{hash}) {
$found = 1 if ($patch2->{basePath} eq $patch->{basePath});
} else {
die "conflicting hashes for URL $patch->{url}, " .
"namely $patch2->{hash} and $patch->{hash}";
}
}
}
push @{$patchList}, $patch if !$found;
return !$found;
}
sub readManifest {
my $manifest = shift;
my $narFiles = shift;
my $patches = shift;
my $successors = shift;
open MANIFEST, "<$manifest"
or die "cannot open `$manifest': $!";
my $inside = 0;
my $type;
my $storePath;
my $url;
my $hash;
my $size;
my @preds;
my $basePath;
my $baseHash;
my $patchType;
my $narHash;
my $references;
my $deriver;
my $hashAlgo;
while (<MANIFEST>) {
chomp;
s/\#.*$//g;
next if (/^$/);
if (!$inside) {
if (/^\s*(\w*)\s*\{$/) {
$type = $1;
$type = "narfile" if $type eq "";
$inside = 1;
undef $storePath;
undef $url;
undef $hash;
undef $size;
@preds = ();
undef $narHash;
undef $basePath;
undef $baseHash;
undef $patchType;
$references = "";
$deriver = "";
$hashAlgo = "md5";
}
} else {
if (/^\}$/) {
$inside = 0;
if ($type eq "narfile") {
$$narFiles{$storePath} = []
unless defined $$narFiles{$storePath};
my $narFileList = $$narFiles{$storePath};
my $found = 0;
foreach my $narFile (@{$narFileList}) {
if ($narFile->{url} eq $url) {
if ($narFile->{hash} eq $hash) {
$found = 1;
} else {
die "conflicting hashes for URL $url, " .
"namely $narFile->{hash} and $hash";
}
}
}
if (!$found) {
push @{$narFileList},
{ url => $url, hash => $hash, size => $size
, narHash => $narHash, references => $references
, deriver => $deriver, hashAlgo => $hashAlgo
};
}
foreach my $p (@preds) {
$$successors{$p} = $storePath;
}
}
elsif ($type eq "patch") {
addPatch $patches, $storePath,
{ url => $url, hash => $hash, size => $size
, basePath => $basePath, baseHash => $baseHash
, narHash => $narHash, patchType => $patchType
, hashAlgo => $hashAlgo
};
}
}
elsif (/^\s*StorePath:\s*(\/\S+)\s*$/) { $storePath = $1; }
elsif (/^\s*HashAlgo:\s*(\S+)\s*$/) { $hashAlgo = $1; }
elsif (/^\s*Hash:\s*(\S+)\s*$/) { $hash = $1; }
elsif (/^\s*URL:\s*(\S+)\s*$/) { $url = $1; }
elsif (/^\s*Size:\s*(\d+)\s*$/) { $size = $1; }
elsif (/^\s*SuccOf:\s*(\/\S+)\s*$/) { push @preds, $1; }
elsif (/^\s*BasePath:\s*(\/\S+)\s*$/) { $basePath = $1; }
elsif (/^\s*BaseHash:\s*(\S+)\s*$/) { $baseHash = $1; }
elsif (/^\s*Type:\s*(\S+)\s*$/) { $patchType = $1; }
elsif (/^\s*NarHash:\s*(\S+)\s*$/) { $narHash = $1; }
elsif (/^\s*References:\s*(.*)\s*$/) { $references = $1; }
elsif (/^\s*Deriver:\s*(\S+)\s*$/) { $deriver = $1; }
# Compatibility;
elsif (/^\s*NarURL:\s*(\S+)\s*$/) { $url = $1; }
elsif (/^\s*MD5:\s*(\S+)\s*$/) { $hash = $1; }
}
}
close MANIFEST;
}
sub writeManifest
{
my $manifest = shift;
my $narFiles = shift;
my $patches = shift;
open MANIFEST, ">$manifest.tmp"; # !!! check exclusive
foreach my $storePath (keys %{$narFiles}) {
my $narFileList = $$narFiles{$storePath};
foreach my $narFile (@{$narFileList}) {
print MANIFEST "{\n";
print MANIFEST " StorePath: $storePath\n";
print MANIFEST " HashAlgo: $narFile->{hashAlgo}\n";
print MANIFEST " NarURL: $narFile->{url}\n";
if ($narFile->{hashAlgo} eq "md5") {
print MANIFEST " MD5: $narFile->{hash}\n";
} else {
print MANIFEST " Hash: $narFile->{hash}\n";
}
print MANIFEST " NarHash: $narFile->{narHash}\n";
print MANIFEST " Size: $narFile->{size}\n";
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 "}\n";
}
}
foreach my $storePath (keys %{$patches}) {
my $patchList = $$patches{$storePath};
foreach my $patch (@{$patchList}) {
print MANIFEST "patch {\n";
print MANIFEST " StorePath: $storePath\n";
print MANIFEST " HashAlgo: $patch->{hashAlgo}\n";
print MANIFEST " NarURL: $patch->{url}\n";
if ($patch->{hashAlgo} eq "md5") {
print MANIFEST " MD5: $patch->{hash}\n";
} else {
print MANIFEST " Hash: $patch->{hash}\n";
}
print MANIFEST " NarHash: $patch->{narHash}\n";
print MANIFEST " Size: $patch->{size}\n";
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: $!";
}
return 1;