Move command plugin interface to libnixcmd

1 files changed, 0 insertions, 824 deletions

diff --git a/src/nix/installables.cc b/src/nix/installables.cc
deleted file mode 100644
index 4e6bf4a9a..000000000
--- a/src/nix/installables.cc
+++ /dev/null
@@ -1,824 +0,0 @@
-#include "installables.hh"
-#include "command.hh"
-#include "attr-path.hh"
-#include "common-eval-args.hh"
-#include "derivations.hh"
-#include "eval-inline.hh"
-#include "eval.hh"
-#include "get-drvs.hh"
-#include "store-api.hh"
-#include "shared.hh"
-#include "flake/flake.hh"
-#include "eval-cache.hh"
-#include "url.hh"
-#include "registry.hh"
-
-#include <regex>
-#include <queue>
-
-#include <nlohmann/json.hpp>
-
-namespace nix {
-
-nlohmann::json BuildableOpaque::toJSON(ref<Store> store) const {
-    nlohmann::json res;
-    res["path"] = store->printStorePath(path);
-    return res;
-}
-
-nlohmann::json BuildableFromDrv::toJSON(ref<Store> store) const {
-    nlohmann::json res;
-    res["drvPath"] = store->printStorePath(drvPath);
-    for (const auto& [output, path] : outputs) {
-        res["outputs"][output] = path ? store->printStorePath(*path) : "";
-    }
-    return res;
-}
-
-nlohmann::json buildablesToJSON(const Buildables & buildables, ref<Store> store) {
-    auto res = nlohmann::json::array();
-    for (const Buildable & buildable : buildables) {
-        std::visit([&res, store](const auto & buildable) {
-            res.push_back(buildable.toJSON(store));
-        }, buildable);
-    }
-    return res;
-}
-
-void completeFlakeInputPath(
-    ref<EvalState> evalState,
-    const FlakeRef & flakeRef,
-    std::string_view prefix)
-{
-    auto flake = flake::getFlake(*evalState, flakeRef, true);
-    for (auto & input : flake.inputs)
-        if (hasPrefix(input.first, prefix))
-            completions->add(input.first);
-}
-
-MixFlakeOptions::MixFlakeOptions()
-{
-    auto category = "Common flake-related options";
-
-    addFlag({
-        .longName = "recreate-lock-file",
-        .description = "Recreate the flake's lock file from scratch.",
-        .category = category,
-        .handler = {&lockFlags.recreateLockFile, true}
-    });
-
-    addFlag({
-        .longName = "no-update-lock-file",
-        .description = "Do not allow any updates to the flake's lock file.",
-        .category = category,
-        .handler = {&lockFlags.updateLockFile, false}
-    });
-
-    addFlag({
-        .longName = "no-write-lock-file",
-        .description = "Do not write the flake's newly generated lock file.",
-        .category = category,
-        .handler = {&lockFlags.writeLockFile, false}
-    });
-
-    addFlag({
-        .longName = "no-registries",
-        .description = "Don't allow lookups in the flake registries.",
-        .category = category,
-        .handler = {&lockFlags.useRegistries, false}
-    });
-
-    addFlag({
-        .longName = "commit-lock-file",
-        .description = "Commit changes to the flake's lock file.",
-        .category = category,
-        .handler = {&lockFlags.commitLockFile, true}
-    });
-
-    addFlag({
-        .longName = "update-input",
-        .description = "Update a specific flake input (ignoring its previous entry in the lock file).",
-        .category = category,
-        .labels = {"input-path"},
-        .handler = {[&](std::string s) {
-            lockFlags.inputUpdates.insert(flake::parseInputPath(s));
-        }},
-        .completer = {[&](size_t, std::string_view prefix) {
-            if (auto flakeRef = getFlakeRefForCompletion())
-                completeFlakeInputPath(getEvalState(), *flakeRef, prefix);
-        }}
-    });
-
-    addFlag({
-        .longName = "override-input",
-        .description = "Override a specific flake input (e.g. `dwarffs/nixpkgs`).",
-        .category = category,
-        .labels = {"input-path", "flake-url"},
-        .handler = {[&](std::string inputPath, std::string flakeRef) {
-            lockFlags.inputOverrides.insert_or_assign(
-                flake::parseInputPath(inputPath),
-                parseFlakeRef(flakeRef, absPath(".")));
-        }}
-    });
-
-    addFlag({
-        .longName = "inputs-from",
-        .description = "Use the inputs of the specified flake as registry entries.",
-        .category = category,
-        .labels = {"flake-url"},
-        .handler = {[&](std::string flakeRef) {
-            auto evalState = getEvalState();
-            auto flake = flake::lockFlake(
-                *evalState,
-                parseFlakeRef(flakeRef, absPath(".")),
-                { .writeLockFile = false });
-            for (auto & [inputName, input] : flake.lockFile.root->inputs) {
-                auto input2 = flake.lockFile.findInput({inputName}); // resolve 'follows' nodes
-                if (auto input3 = std::dynamic_pointer_cast<const flake::LockedNode>(input2)) {
-                    overrideRegistry(
-                        fetchers::Input::fromAttrs({{"type","indirect"}, {"id", inputName}}),
-                        input3->lockedRef.input,
-                        {});
-                }
-            }
-        }},
-        .completer = {[&](size_t, std::string_view prefix) {
-            completeFlakeRef(getEvalState()->store, prefix);
-        }}
-    });
-}
-
-SourceExprCommand::SourceExprCommand()
-{
-    addFlag({
-        .longName = "file",
-        .shortName = 'f',
-        .description = "Interpret installables as attribute paths relative to the Nix expression stored in *file*.",
-        .category = installablesCategory,
-        .labels = {"file"},
-        .handler = {&file},
-        .completer = completePath
-    });
-
-    addFlag({
-        .longName = "expr",
-        .description = "Interpret installables as attribute paths relative to the Nix expression *expr*.",
-        .category = installablesCategory,
-        .labels = {"expr"},
-        .handler = {&expr}
-    });
-
-    addFlag({
-        .longName = "derivation",
-        .description = "Operate on the store derivation rather than its outputs.",
-        .category = installablesCategory,
-        .handler = {&operateOn, OperateOn::Derivation},
-    });
-}
-
-Strings SourceExprCommand::getDefaultFlakeAttrPaths()
-{
-    return {"defaultPackage." + settings.thisSystem.get()};
-}
-
-Strings SourceExprCommand::getDefaultFlakeAttrPathPrefixes()
-{
-    return {
-        // As a convenience, look for the attribute in
-        // 'outputs.packages'.
-        "packages." + settings.thisSystem.get() + ".",
-        // As a temporary hack until Nixpkgs is properly converted
-        // to provide a clean 'packages' set, look in 'legacyPackages'.
-        "legacyPackages." + settings.thisSystem.get() + "."
-    };
-}
-
-void SourceExprCommand::completeInstallable(std::string_view prefix)
-{
-    if (file) return; // FIXME
-
-    completeFlakeRefWithFragment(
-        getEvalState(),
-        lockFlags,
-        getDefaultFlakeAttrPathPrefixes(),
-        getDefaultFlakeAttrPaths(),
-        prefix);
-}
-
-void completeFlakeRefWithFragment(
-    ref<EvalState> evalState,
-    flake::LockFlags lockFlags,
-    Strings attrPathPrefixes,
-    const Strings & defaultFlakeAttrPaths,
-    std::string_view prefix)
-{
-    /* Look for flake output attributes that match the
-       prefix. */
-    try {
-        auto hash = prefix.find('#');
-        if (hash != std::string::npos) {
-            auto fragment = prefix.substr(hash + 1);
-            auto flakeRefS = std::string(prefix.substr(0, hash));
-            // FIXME: do tilde expansion.
-            auto flakeRef = parseFlakeRef(flakeRefS, absPath("."));
-
-            auto evalCache = openEvalCache(*evalState,
-                std::make_shared<flake::LockedFlake>(lockFlake(*evalState, flakeRef, lockFlags)));
-
-            auto root = evalCache->getRoot();
-
-            /* Complete 'fragment' relative to all the
-               attrpath prefixes as well as the root of the
-               flake. */
-            attrPathPrefixes.push_back("");
-
-            for (auto & attrPathPrefixS : attrPathPrefixes) {
-                auto attrPathPrefix = parseAttrPath(*evalState, attrPathPrefixS);
-                auto attrPathS = attrPathPrefixS + std::string(fragment);
-                auto attrPath = parseAttrPath(*evalState, attrPathS);
-
-                std::string lastAttr;
-                if (!attrPath.empty() && !hasSuffix(attrPathS, ".")) {
-                    lastAttr = attrPath.back();
-                    attrPath.pop_back();
-                }
-
-                auto attr = root->findAlongAttrPath(attrPath);
-                if (!attr) continue;
-
-                for (auto & attr2 : attr->getAttrs()) {
-                    if (hasPrefix(attr2, lastAttr)) {
-                        auto attrPath2 = attr->getAttrPath(attr2);
-                        /* Strip the attrpath prefix. */
-                        attrPath2.erase(attrPath2.begin(), attrPath2.begin() + attrPathPrefix.size());
-                        completions->add(flakeRefS + "#" + concatStringsSep(".", attrPath2));
-                    }
-                }
-            }
-
-            /* And add an empty completion for the default
-               attrpaths. */
-            if (fragment.empty()) {
-                for (auto & attrPath : defaultFlakeAttrPaths) {
-                    auto attr = root->findAlongAttrPath(parseAttrPath(*evalState, attrPath));
-                    if (!attr) continue;
-                    completions->add(flakeRefS + "#");
-                }
-            }
-        }
-    } catch (Error & e) {
-        warn(e.msg());
-    }
-
-    completeFlakeRef(evalState->store, prefix);
-}
-
-ref<EvalState> EvalCommand::getEvalState()
-{
-    if (!evalState)
-        evalState = std::make_shared<EvalState>(searchPath, getStore());
-    return ref<EvalState>(evalState);
-}
-
-void completeFlakeRef(ref<Store> store, std::string_view prefix)
-{
-    if (prefix == "")
-        completions->add(".");
-
-    completeDir(0, prefix);
-
-    /* Look for registry entries that match the prefix. */
-    for (auto & registry : fetchers::getRegistries(store)) {
-        for (auto & entry : registry->entries) {
-            auto from = entry.from.to_string();
-            if (!hasPrefix(prefix, "flake:") && hasPrefix(from, "flake:")) {
-                std::string from2(from, 6);
-                if (hasPrefix(from2, prefix))
-                    completions->add(from2);
-            } else {
-                if (hasPrefix(from, prefix))
-                    completions->add(from);
-            }
-        }
-    }
-}
-
-Buildable Installable::toBuildable()
-{
-    auto buildables = toBuildables();
-    if (buildables.size() != 1)
-        throw Error("installable '%s' evaluates to %d derivations, where only one is expected", what(), buildables.size());
-    return std::move(buildables[0]);
-}
-
-std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
-Installable::getCursors(EvalState & state)
-{
-    auto evalCache =
-        std::make_shared<nix::eval_cache::EvalCache>(std::nullopt, state,
-            [&]() { return toValue(state).first; });
-    return {{evalCache->getRoot(), ""}};
-}
-
-std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>
-Installable::getCursor(EvalState & state)
-{
-    auto cursors = getCursors(state);
-    if (cursors.empty())
-        throw Error("cannot find flake attribute '%s'", what());
-    return cursors[0];
-}
-
-struct InstallableStorePath : Installable
-{
-    ref<Store> store;
-    StorePath storePath;
-
-    InstallableStorePath(ref<Store> store, StorePath && storePath)
-        : store(store), storePath(std::move(storePath)) { }
-
-    std::string what() override { return store->printStorePath(storePath); }
-
-    Buildables toBuildables() override
-    {
-        if (storePath.isDerivation()) {
-            std::map<std::string, std::optional<StorePath>> outputs;
-            auto drv = store->readDerivation(storePath);
-            for (auto & [name, output] : drv.outputsAndOptPaths(*store))
-                outputs.emplace(name, output.second);
-            return {
-                BuildableFromDrv {
-                    .drvPath = storePath,
-                    .outputs = std::move(outputs)
-                }
-            };
-        } else {
-            return {
-                BuildableOpaque {
-                    .path = storePath,
-                }
-            };
-        }
-    }
-
-    std::optional<StorePath> getStorePath() override
-    {
-        return storePath;
-    }
-};
-
-Buildables InstallableValue::toBuildables()
-{
-    Buildables res;
-
-    std::map<StorePath, std::map<std::string, std::optional<StorePath>>> drvsToOutputs;
-
-    // Group by derivation, helps with .all in particular
-    for (auto & drv : toDerivations()) {
-        auto outputName = drv.outputName;
-        if (outputName == "")
-            throw Error("derivation '%s' lacks an 'outputName' attribute", state->store->printStorePath(drv.drvPath));
-        drvsToOutputs[drv.drvPath].insert_or_assign(outputName, drv.outPath);
-    }
-
-    for (auto & i : drvsToOutputs)
-        res.push_back(BuildableFromDrv { i.first, i.second });
-
-    return res;
-}
-
-struct InstallableAttrPath : InstallableValue
-{
-    SourceExprCommand & cmd;
-    RootValue v;
-    std::string attrPath;
-
-    InstallableAttrPath(ref<EvalState> state, SourceExprCommand & cmd, Value * v, const std::string & attrPath)
-        : InstallableValue(state), cmd(cmd), v(allocRootValue(v)), attrPath(attrPath)
-    { }
-
-    std::string what() override { return attrPath; }
-
-    std::pair<Value *, Pos> toValue(EvalState & state) override
-    {
-        auto [vRes, pos] = findAlongAttrPath(state, attrPath, *cmd.getAutoArgs(state), **v);
-        state.forceValue(*vRes);
-        return {vRes, pos};
-    }
-
-    virtual std::vector<InstallableValue::DerivationInfo> toDerivations() override;
-};
-
-std::vector<InstallableValue::DerivationInfo> InstallableAttrPath::toDerivations()
-{
-    auto v = toValue(*state).first;
-
-    Bindings & autoArgs = *cmd.getAutoArgs(*state);
-
-    DrvInfos drvInfos;
-    getDerivations(*state, *v, "", autoArgs, drvInfos, false);
-
-    std::vector<DerivationInfo> res;
-    for (auto & drvInfo : drvInfos) {
-        res.push_back({
-            state->store->parseStorePath(drvInfo.queryDrvPath()),
-            state->store->maybeParseStorePath(drvInfo.queryOutPath()),
-            drvInfo.queryOutputName()
-        });
-    }
-
-    return res;
-}
-
-std::vector<std::string> InstallableFlake::getActualAttrPaths()
-{
-    std::vector<std::string> res;
-
-    for (auto & prefix : prefixes)
-        res.push_back(prefix + *attrPaths.begin());
-
-    for (auto & s : attrPaths)
-        res.push_back(s);
-
-    return res;
-}
-
-Value * InstallableFlake::getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake)
-{
-    auto vFlake = state.allocValue();
-
-    callFlake(state, lockedFlake, *vFlake);
-
-    auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
-    assert(aOutputs);
-
-    state.forceValue(*aOutputs->value);
-
-    return aOutputs->value;
-}
-
-ref<eval_cache::EvalCache> openEvalCache(
-    EvalState & state,
-    std::shared_ptr<flake::LockedFlake> lockedFlake)
-{
-    auto fingerprint = lockedFlake->getFingerprint();
-    return make_ref<nix::eval_cache::EvalCache>(
-        evalSettings.useEvalCache && evalSettings.pureEval
-            ? std::optional { std::cref(fingerprint) }
-            : std::nullopt,
-        state,
-        [&state, lockedFlake]()
-        {
-            /* For testing whether the evaluation cache is
-               complete. */
-            if (getEnv("NIX_ALLOW_EVAL").value_or("1") == "0")
-                throw Error("not everything is cached, but evaluation is not allowed");
-
-            auto vFlake = state.allocValue();
-            flake::callFlake(state, *lockedFlake, *vFlake);
-
-            state.forceAttrs(*vFlake);
-
-            auto aOutputs = vFlake->attrs->get(state.symbols.create("outputs"));
-            assert(aOutputs);
-
-            return aOutputs->value;
-        });
-}
-
-static std::string showAttrPaths(const std::vector<std::string> & paths)
-{
-    std::string s;
-    for (const auto & [n, i] : enumerate(paths)) {
-        if (n > 0) s += n + 1 == paths.size() ? " or " : ", ";
-        s += '\''; s += i; s += '\'';
-    }
-    return s;
-}
-
-std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableFlake::toDerivation()
-{
-    auto lockedFlake = getLockedFlake();
-
-    auto cache = openEvalCache(*state, lockedFlake);
-    auto root = cache->getRoot();
-
-    for (auto & attrPath : getActualAttrPaths()) {
-        auto attr = root->findAlongAttrPath(parseAttrPath(*state, attrPath));
-        if (!attr) continue;
-
-        if (!attr->isDerivation())
-            throw Error("flake output attribute '%s' is not a derivation", attrPath);
-
-        auto drvPath = attr->forceDerivation();
-
-        auto drvInfo = DerivationInfo{
-            std::move(drvPath),
-            state->store->maybeParseStorePath(attr->getAttr(state->sOutPath)->getString()),
-            attr->getAttr(state->sOutputName)->getString()
-        };
-
-        return {attrPath, lockedFlake->flake.lockedRef, std::move(drvInfo)};
-    }
-
-    throw Error("flake '%s' does not provide attribute %s",
-        flakeRef, showAttrPaths(getActualAttrPaths()));
-}
-
-std::vector<InstallableValue::DerivationInfo> InstallableFlake::toDerivations()
-{
-    std::vector<DerivationInfo> res;
-    res.push_back(std::get<2>(toDerivation()));
-    return res;
-}
-
-std::pair<Value *, Pos> InstallableFlake::toValue(EvalState & state)
-{
-    auto lockedFlake = getLockedFlake();
-
-    auto vOutputs = getFlakeOutputs(state, *lockedFlake);
-
-    auto emptyArgs = state.allocBindings(0);
-
-    for (auto & attrPath : getActualAttrPaths()) {
-        try {
-            auto [v, pos] = findAlongAttrPath(state, attrPath, *emptyArgs, *vOutputs);
-            state.forceValue(*v);
-            return {v, pos};
-        } catch (AttrPathNotFound & e) {
-        }
-    }
-
-    throw Error("flake '%s' does not provide attribute %s",
-        flakeRef, showAttrPaths(getActualAttrPaths()));
-}
-
-std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
-InstallableFlake::getCursors(EvalState & state)
-{
-    auto evalCache = openEvalCache(state,
-        std::make_shared<flake::LockedFlake>(lockFlake(state, flakeRef, lockFlags)));
-
-    auto root = evalCache->getRoot();
-
-    std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>> res;
-
-    for (auto & attrPath : getActualAttrPaths()) {
-        auto attr = root->findAlongAttrPath(parseAttrPath(state, attrPath));
-        if (attr) res.push_back({attr, attrPath});
-    }
-
-    return res;
-}
-
-std::shared_ptr<flake::LockedFlake> InstallableFlake::getLockedFlake() const
-{
-    if (!_lockedFlake) {
-        _lockedFlake = std::make_shared<flake::LockedFlake>(lockFlake(*state, flakeRef, lockFlags));
-        _lockedFlake->flake.config.apply();
-        // FIXME: send new config to the daemon.
-    }
-    return _lockedFlake;
-}
-
-FlakeRef InstallableFlake::nixpkgsFlakeRef() const
-{
-    auto lockedFlake = getLockedFlake();
-
-    if (auto nixpkgsInput = lockedFlake->lockFile.findInput({"nixpkgs"})) {
-        if (auto lockedNode = std::dynamic_pointer_cast<const flake::LockedNode>(nixpkgsInput)) {
-            debug("using nixpkgs flake '%s'", lockedNode->lockedRef);
-            return std::move(lockedNode->lockedRef);
-        }
-    }
-
-    return Installable::nixpkgsFlakeRef();
-}
-
-std::vector<std::shared_ptr<Installable>> SourceExprCommand::parseInstallables(
-    ref<Store> store, std::vector<std::string> ss)
-{
-    std::vector<std::shared_ptr<Installable>> result;
-
-    if (file || expr) {
-        if (file && expr)
-            throw UsageError("'--file' and '--expr' are exclusive");
-
-        // FIXME: backward compatibility hack
-        if (file) evalSettings.pureEval = false;
-
-        auto state = getEvalState();
-        auto vFile = state->allocValue();
-
-        if (file)
-            state->evalFile(lookupFileArg(*state, *file), *vFile);
-        else {
-            auto e = state->parseExprFromString(*expr, absPath("."));
-            state->eval(e, *vFile);
-        }
-
-        for (auto & s : ss)
-            result.push_back(std::make_shared<InstallableAttrPath>(state, *this, vFile, s == "." ? "" : s));
-
-    } else {
-
-        for (auto & s : ss) {
-            std::exception_ptr ex;
-
-            try {
-                auto [flakeRef, fragment] = parseFlakeRefWithFragment(s, absPath("."));
-                result.push_back(std::make_shared<InstallableFlake>(
-                        getEvalState(), std::move(flakeRef),
-                        fragment == "" ? getDefaultFlakeAttrPaths() : Strings{fragment},
-                        getDefaultFlakeAttrPathPrefixes(), lockFlags));
-                continue;
-            } catch (...) {
-                ex = std::current_exception();
-            }
-
-            if (s.find('/') != std::string::npos) {
-                try {
-                    result.push_back(std::make_shared<InstallableStorePath>(store, store->followLinksToStorePath(s)));
-                    continue;
-                } catch (BadStorePath &) {
-                } catch (...) {
-                    if (!ex)
-                        ex = std::current_exception();
-                }
-            }
-
-            std::rethrow_exception(ex);
-
-            /*
-            throw Error(
-                pathExists(s)
-                ? "path '%s' is not a flake or a store path"
-                : "don't know how to handle argument '%s'", s);
-            */
-        }
-    }
-
-    return result;
-}
-
-std::shared_ptr<Installable> SourceExprCommand::parseInstallable(
-    ref<Store> store, const std::string & installable)
-{
-    auto installables = parseInstallables(store, {installable});
-    assert(installables.size() == 1);
-    return installables.front();
-}
-
-Buildables build(ref<Store> store, Realise mode,
-    std::vector<std::shared_ptr<Installable>> installables, BuildMode bMode)
-{
-    if (mode == Realise::Nothing)
-        settings.readOnlyMode = true;
-
-    Buildables buildables;
-
-    std::vector<StorePathWithOutputs> pathsToBuild;
-
-    for (auto & i : installables) {
-        for (auto & b : i->toBuildables()) {
-            std::visit(overloaded {
-                [&](BuildableOpaque bo) {
-                    pathsToBuild.push_back({bo.path});
-                },
-                [&](BuildableFromDrv bfd) {
-                    StringSet outputNames;
-                    for (auto & output : bfd.outputs)
-                        outputNames.insert(output.first);
-                    pathsToBuild.push_back({bfd.drvPath, outputNames});
-                },
-            }, b);
-            buildables.push_back(std::move(b));
-        }
-    }
-
-    if (mode == Realise::Nothing)
-        printMissing(store, pathsToBuild, lvlError);
-    else if (mode == Realise::Outputs)
-        store->buildPaths(pathsToBuild, bMode);
-
-    return buildables;
-}
-
-StorePathSet toStorePaths(ref<Store> store,
-    Realise mode, OperateOn operateOn,
-    std::vector<std::shared_ptr<Installable>> installables)
-{
-    StorePathSet outPaths;
-
-    if (operateOn == OperateOn::Output) {
-        for (auto & b : build(store, mode, installables))
-            std::visit(overloaded {
-                [&](BuildableOpaque bo) {
-                    outPaths.insert(bo.path);
-                },
-                [&](BuildableFromDrv bfd) {
-                    for (auto & output : bfd.outputs) {
-                        if (!output.second)
-                            throw Error("Cannot operate on output of unbuilt CA drv");
-                        outPaths.insert(*output.second);
-                    }
-                },
-            }, b);
-    } else {
-        if (mode == Realise::Nothing)
-            settings.readOnlyMode = true;
-
-        for (auto & i : installables)
-            for (auto & b : i->toBuildables())
-                if (auto bfd = std::get_if<BuildableFromDrv>(&b))
-                    outPaths.insert(bfd->drvPath);
-    }
-
-    return outPaths;
-}
-
-StorePath toStorePath(ref<Store> store,
-    Realise mode, OperateOn operateOn,
-    std::shared_ptr<Installable> installable)
-{
-    auto paths = toStorePaths(store, mode, operateOn, {installable});
-
-    if (paths.size() != 1)
-        throw Error("argument '%s' should evaluate to one store path", installable->what());
-
-    return *paths.begin();
-}
-
-StorePathSet toDerivations(ref<Store> store,
-    std::vector<std::shared_ptr<Installable>> installables, bool useDeriver)
-{
-    StorePathSet drvPaths;
-
-    for (auto & i : installables)
-        for (auto & b : i->toBuildables())
-            std::visit(overloaded {
-                [&](BuildableOpaque bo) {
-                    if (!useDeriver)
-                        throw Error("argument '%s' did not evaluate to a derivation", i->what());
-                    auto derivers = store->queryValidDerivers(bo.path);
-                    if (derivers.empty())
-                        throw Error("'%s' does not have a known deriver", i->what());
-                    // FIXME: use all derivers?
-                    drvPaths.insert(*derivers.begin());
-                },
-                [&](BuildableFromDrv bfd) {
-                    drvPaths.insert(bfd.drvPath);
-                },
-            }, b);
-
-    return drvPaths;
-}
-
-InstallablesCommand::InstallablesCommand()
-{
-    expectArgs({
-        .label = "installables",
-        .handler = {&_installables},
-        .completer = {[&](size_t, std::string_view prefix) {
-            completeInstallable(prefix);
-        }}
-    });
-}
-
-void InstallablesCommand::prepare()
-{
-    if (_installables.empty() && useDefaultInstallables())
-        // FIXME: commands like "nix install" should not have a
-        // default, probably.
-        _installables.push_back(".");
-    installables = parseInstallables(getStore(), _installables);
-}
-
-std::optional<FlakeRef> InstallablesCommand::getFlakeRefForCompletion()
-{
-    if (_installables.empty()) {
-        if (useDefaultInstallables())
-            return parseFlakeRef(".", absPath("."));
-        return {};
-    }
-    return parseFlakeRef(_installables.front(), absPath("."));
-}
-
-InstallableCommand::InstallableCommand()
-{
-    expectArgs({
-        .label = "installable",
-        .optional = true,
-        .handler = {&_installable},
-        .completer = {[&](size_t, std::string_view prefix) {
-            completeInstallable(prefix);
-        }}
-    });
-}
-
-void InstallableCommand::prepare()
-{
-    installable = parseInstallable(getStore(), _installable);
-}
-
-}