lix/src/nix/make-content-addressable.cc

#include "command.hh"
#include "store-api.hh"
#include "make-content-addressed.hh"
#include "common-args.hh"
#include "json.hh"

using namespace nix;

struct CmdMakeContentAddressable : StorePathsCommand, MixJSON
{
    CmdMakeContentAddressable()
    {
        realiseMode = Realise::Outputs;
    }

    std::string description() override
    {
        return "rewrite a path or closure to content-addressed form";
    }

    std::string doc() override
    {
        return
          #include "make-content-addressable.md"
          ;
    }

    void run(ref<Store> store, StorePaths && storePaths) override
    {
        auto remappings = makeContentAddressed(*store, *store,
            StorePathSet(storePaths.begin(), storePaths.end()));

        if (json) {
            JSONObject jsonRoot(std::cout);
            JSONObject jsonRewrites(jsonRoot.object("rewrites"));
            for (auto & path : storePaths) {
                auto i = remappings.find(path);
                assert(i != remappings.end());
                jsonRewrites.attr(store->printStorePath(path), store->printStorePath(i->second));
            }
        } else {
            for (auto & path : storePaths) {
                auto i = remappings.find(path);
                assert(i != remappings.end());
                notice("rewrote '%s' to '%s'",
                    store->printStorePath(path),
                    store->printStorePath(i->second));
            }
        }
    }
};

static auto rCmdMakeContentAddressable = registerCommand2<CmdMakeContentAddressable>({"store", "make-content-addressable"});