nix-super/tests/functional/test-libstoreconsumer/main.cc

#include "globals.hh"
#include "store-api.hh"
#include "build-result.hh"
#include <iostream>

using namespace nix;

int main (int argc, char **argv)
{
    try {
        if (argc != 2) {
            std::cerr << "Usage: " << argv[0] << " store/path/to/something.drv\n";
            return 1;
        }

        std::string drvPath = argv[1];

        // This small program is a test, so we do not want user config to interfere.
        initLibStore(false);

        auto store = nix::openStore();

        // build the derivation

        std::vector<DerivedPath> paths {
            DerivedPath::Built {
                .drvPath = makeConstantStorePathRef(store->parseStorePath(drvPath)),
                .outputs = OutputsSpec::Names{"out"}
            }
        };

        const auto results = store->buildPathsWithResults(paths, bmNormal, store);

        for (const auto & result : results) {
            for (const auto & [outputName, realisation] : result.builtOutputs) {
                std::cout << store->printStorePath(realisation.outPath) << "\n";
            }
        }

        return 0;

    } catch (const std::exception & e) {
        std::cerr << "Error: " << e.what() << "\n";
        return 1;
    }
}