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* Get rid of the substitutes database table (NIX-47). Instead, if we

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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).
This commit is contained in:
Eelco Dolstra 2007-08-12 00:29:28 +00:00
parent 4695f4edd6
commit 9e975458b4
24 changed files with 357 additions and 469 deletions
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38
scripts/nix-pull.in
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@ -108,41 +108,3 @@ while (@ARGV) {
my $size = scalar (keys %narFiles) + scalar (keys %localPaths);
print "$size store paths in manifest\n";
# Register all substitutes.
print STDERR "registering substitutes...\n";
my $pid = open(WRITE, "|$binDir/nix-store --register-substitutes")
or die "cannot run nix-store";
sub writeRegistration {
my $storePath = shift;
my $object = shift;
print WRITE "$storePath\n";
print WRITE "$object->{deriver}\n";
print WRITE "$libexecDir/nix/download-using-manifests.pl\n";
print WRITE "0\n";
my @references = split " ", $object->{references};
my $count = scalar @references;
print WRITE "$count\n";
foreach my $reference (@references) {
print WRITE "$reference\n";
}
}
foreach my $storePath (keys %narFiles) {
my $narFileList = $narFiles{$storePath};
foreach my $narFile (@{$narFileList}) {
writeRegistration $storePath, $narFile;
}
}
foreach my $storePath (keys %localPaths) {
my $localPathList = $localPaths{$storePath};
foreach my $localPath (@{$localPathList}) {
writeRegistration $storePath, $localPath;
}
}
close WRITE or die "nix-store failed: $?";