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* New kind of manifest object: "localPath", which denotes that a store

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path can be created by copying it from another location in the file
  system.  This is useful in the NixOS installation.
This commit is contained in:
Eelco Dolstra 2007-01-23 16:50:19 +00:00
parent 36d9258c0d
commit bae75ca5a1
8 changed files with 73 additions and 22 deletions
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16
scripts/download-using-manifests.pl.in
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@ -34,17 +34,31 @@ print "\n*** Trying to download/patch `$targetPath'\n";
# Load all manifests.
my %narFiles;
my %localPaths;
my %patches;
for my $manifest (glob "$manifestDir/*.nixmanifest") {
# print STDERR "reading $manifest\n";
if (readManifest($manifest, \%narFiles, \%patches) < 3) {
if (readManifest($manifest, \%narFiles, \%localPaths, \%patches) < 3) {
print STDERR "you have an old-style manifest `$manifest'; please delete it\n";
exit 1;
}
}
# If we can copy from a local path, do that.
my $localPathList = $localPaths{$targetPath};
foreach my $localPath (@{$localPathList}) {
my $sourcePath = $localPath->{copyFrom};
if (-e $sourcePath) {
print "\n*** Step 1/1: copying from $sourcePath\n";
system("@bindir@/nix-store --dump $sourcePath | @bindir@/nix-store --restore $targetPath") == 0
or die "cannot copy `$sourcePath' to `$targetPath'";
exit 0;
}
}
# Build a graph of all store paths that might contribute to the
# construction of $targetPath, and the special node "start". The
# edges are either patch operations, or downloads of full NAR files.