73acb8b836
Since SubstitutionGoal::finished() in build.cc computes the hash anyway, we can prevent the inefficiency of computing the hash twice by letting the substituter tell Nix about the expected hash, which can then verify it.
97 lines
2.7 KiB
Perl
Executable file
97 lines
2.7 KiB
Perl
Executable file
#! @perl@ -w @perlFlags@
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use strict;
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use File::Basename;
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use IO::Handle;
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my $binDir = $ENV{"NIX_BIN_DIR"} || "@bindir@";
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STDOUT->autoflush(1);
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my @remoteStoresAll = split ':', ($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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$ENV{"NIX_REMOTE"} = "";
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sub findStorePath {
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my $storePath = shift;
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foreach my $store (@remoteStores) {
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my $sourcePath = "$store/store/" . basename $storePath;
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next unless -e $sourcePath || -l $sourcePath;
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$ENV{"NIX_DB_DIR"} = "$store/var/nix/db";
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return ($store, $sourcePath) if
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system("@bindir@/nix-store --check-validity $storePath") == 0;
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}
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return undef;
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}
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if ($ARGV[0] eq "--query") {
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while (<STDIN>) {
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chomp;
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my ($cmd, @args) = split " ", $_;
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if ($cmd eq "have") {
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foreach my $storePath (@args) {
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print "$storePath\n" if defined findStorePath($storePath);
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}
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print "\n";
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}
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elsif ($cmd eq "info") {
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foreach my $storePath (@args) {
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my ($store, $sourcePath) = findStorePath($storePath);
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next unless defined $store;
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$ENV{"NIX_DB_DIR"} = "$store/var/nix/db";
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my $deriver = `@bindir@/nix-store --query --deriver $storePath`;
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die "cannot query deriver of `$storePath'" if $? != 0;
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chomp $deriver;
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$deriver = "" if $deriver eq "unknown-deriver";
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my @references = split "\n",
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`@bindir@/nix-store --query --references $storePath`;
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die "cannot query references of `$storePath'" if $? != 0;
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my $narSize = `@bindir@/nix-store --query --size $storePath`;
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die "cannot query size of `$storePath'" if $? != 0;
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chomp $narSize;
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print "$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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print "$narSize\n";
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print "$narSize\n";
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}
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print "\n";
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}
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else { die "unknown command `$cmd'"; }
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}
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}
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elsif ($ARGV[0] eq "--substitute") {
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die unless scalar @ARGV == 2;
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my $storePath = $ARGV[1];
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my ($store, $sourcePath) = findStorePath $storePath;
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die unless $store;
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print STDERR "\n*** Copying `$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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print "\n"; # no hash to verify
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}
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else { die; }
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