src/nix/build.cc


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#include "command.hh"
#include "common-args.hh"
#include "shared.hh"
#include "store-api.hh"

using namespace nix;

struct CmdBuild : MixDryRun, InstallablesCommand
{
    CmdBuild()
    {
    }

    std::string name() override
    {
        return "build";
    }

    std::string description() override
    {
        return "build a derivation or fetch a store path";
    }

    void run(ref<Store> store) override
    {
        auto buildables = toBuildables(store, dryRun ? DryRun : Build);

        for (size_t i = 0; i < buildables.size(); ++i) {
            auto & b(buildables[i]);

            for (auto & output : b.outputs) {
                if (auto store2 = store.dynamic_pointer_cast<LocalFSStore>()) {
                    std::string symlink = "result";
                    if (i) symlink += fmt("-%d", i);
                    if (output.first != "out") symlink += fmt("-%s", output.first);
                    store2->addPermRoot(output.second, absPath(symlink), true);
                }
            }
        }
    }
};

static RegisterCommand r1(make_ref<CmdBuild>());