return error($c, "Path " . $product->path . " is no longer available.") unless Hydra::Helper::Nix::isValidPath($product->path);

    return error($c, "Path " . $product->path . " is no longer available.") unless isValidPath($product->path);

use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw(isValidPath getHydraPath getHydraDBPath openHydraDB);

    return system("nix-store --check-validity $path") == 0;

    return system("nix-store --check-validity $path 2> /dev/null") == 0;
}
sub getHydraPath {
    my $dir = $ENV{HYDRA_DATA};
    die "The HYDRA_DATA environment variable is not set!\n" unless defined $dir;
    die "The HYDRA_DATA directory does not exist!\n" unless -d $dir;
    return $dir;
}
sub getHydraDBPath {
    my $path = getHydraPath . '/hydra.sqlite';
    die "The Hydra database ($path) not exist!\n" unless -f $path;
    return "dbi:SQLite:$path";

1;

sub openHydraDB {
    my $db = Hydra::Schema->connect(getHydraDBPath, "", "", {});
    $db->storage->dbh->do("PRAGMA synchronous = OFF;");
    return $db;
}

1;

use Hydra::Helper::Nix;

    connect_info => [
        'dbi:SQLite:../hydra.sqlite',
        
    ],

    connect_info => [getHydraDBPath],

use Hydra::Helper::Nix;

    default_view => "TT"
    );

    default_view => "TT",
    session => {
        storage => getHydraPath . "/session_data"
    }
);

use Hydra::Helper::Nix;

my $db = Hydra::Schema->connect("dbi:SQLite:dbname=hydra.sqlite", "", "", {});

$db->storage->dbh->do("PRAGMA synchronous = OFF;");

my $db = openHydraDB;

sub isValidPath {
    my $path = shift;
    return system("nix-store --check-validity $path 2> /dev/null") == 0;
}

use File::Basename;

use Hydra::Helper::Nix;

my $db = Hydra::Schema->connect("dbi:SQLite:dbname=hydra.sqlite", "", "", {});

chdir getHydraPath or die;
my $db = openHydraDB;

$db->storage->dbh->do("PRAGMA synchronous = OFF;");

my $hydraHome = $ENV{"HYDRA_HOME"};
die "The HYDRA_HOME environment variable is not set!\n" unless defined $hydraHome;

                mkdir(dirname $logfile);

                open LOG, ">$logfile" or die;
                POSIX::dup2(fileno(LOG), 1) or die;
                POSIX::dup2(fileno(LOG), 2) or die;
                exec("perl", "-IHydra/lib", "-w",
                     "./Hydra/programs/Build.pl", $id);
                warn "cannot start build " . $id;

                eval {
                    open LOG, ">$logfile" or die "cannot create logfile $logfile";
                    POSIX::dup2(fileno(LOG), 1) or die;
                    POSIX::dup2(fileno(LOG), 2) or die;
                    exec("perl", "-I$hydraHome/lib", "-w", "$ENV{'HYDRA_HOME'}/programs/Build.pl", $id);
                };
                warn "cannot start build $id: $@";

use Hydra::Helper::Nix;

my $db = Hydra::Schema->connect("dbi:SQLite:dbname=hydra.sqlite", "", "", {});

$db->storage->dbh->do("PRAGMA synchronous = OFF;");

my $db = openHydraDB;

sub isValidPath {
    my $path = shift;
    return system("nix-store --check-validity $path 2> /dev/null") == 0;
}

          product.path %]</tt>.  If you get the error message “imported

          product.path %]</tt>.  You’ll probably also want to do
          <pre>nix-env -i [% product.path %]</pre>
          to actually install the package in your Nix user environment.</p>
          <p>If you get the error message “imported