8bc591a6f0
it only does something if $NIX_OTHER_STORES (not really a good name...) is set. * Do globbing on the elements of $NIX_OTHER_STORES. E.g. you could set it to /mnts/*/nix or something. * Install substituters in libexec/nix/substituters.
87 lines
2.5 KiB
Perl
87 lines
2.5 KiB
Perl
#! @perl@ -w
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use strict;
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use File::Basename;
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my @remoteStoresAll = split ':', ($ENV{"NIX_OTHER_STORES"} or "");
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my @remoteStores;
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foreach my $dir (@remoteStoresAll) {
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push @remoteStores, glob($dir);
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}
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sub findStorePath {
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my $storePath = shift;
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my $storePathName = basename $storePath;
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foreach my $store (@remoteStores) {
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# Determine whether $storePath exists by looking for the
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# existence of the info file, and if so, get store path info
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# from that file. This rather breaks abstraction: we should
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# be using `nix-store' for that. But right now there is no
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# good way to tell nix-store to access a store mounted under a
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# different location (there's $NIX_STORE, but that only works
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# if the remote store is mounted under its "real" location).
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my $infoFile = "$store/var/nix/db/info/$storePathName";
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my $storePath2 = "$store/store/$storePathName";
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if (-f $infoFile && -e $storePath2) {
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return ($infoFile, $storePath2);
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}
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}
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}
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if ($ARGV[0] eq "--query-paths") {
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foreach my $store (@remoteStores) {
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opendir DIR, "$store/var/nix/db/info" or next;
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print "@storedir@/$_\n" foreach readdir DIR;
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closedir DIR;
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}
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}
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elsif ($ARGV[0] eq "--query-info") {
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shift @ARGV;
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foreach my $storePath (@ARGV) {
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(my $infoFile) = findStorePath $storePath;
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next unless $infoFile;
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my $deriver = "";
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my @references = ();
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open INFO, "<$infoFile" or die "cannot read info file $infoFile\n";
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while (<INFO>) {
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chomp;
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#print STDERR "GOT $_\n";
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/^([\w-]+): (.*)$/ or die "bad info file";
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my $key = $1;
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my $value = $2;
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if ($key eq "Deriver") { $deriver = $value; }
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elsif ($key eq "References") { @references = split ' ', $value; }
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}
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close INFO;
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print "$storePath\n";
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print "$deriver\n";
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print scalar @references, "\n";
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print "$_\n" foreach @references;
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}
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}
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elsif ($ARGV[0] eq "--substitute") {
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die unless scalar @ARGV == 2;
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my $storePath = $ARGV[1];
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(my $infoFile, my $sourcePath) = findStorePath $storePath;
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die unless $infoFile;
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print "\n*** Copying `$storePath' from `$sourcePath'\n\n";
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system("@bindir@/nix-store --dump $sourcePath | @bindir@/nix-store --restore $storePath") == 0
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or die "cannot copy `$sourcePath' to `$storePath'";
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}
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else { die; }
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