Function runFetchClosureWithInputAddressedPath

src/libexpr/primops/fetchClosure.cc:104–125

* Fetch the closure and make sure it's input addressed. */

 * Fetch the closure and make sure it's input addressed.
 */
static void runFetchClosureWithInputAddressedPath(
    EvalState & state, const PosIdx pos, Store & fromStore, const StorePath & fromPath, Value & v)
{

    if (!state.store->isValidPath(fromPath))
        copyClosure(fromStore, *state.store, RealisedPath::Set{fromPath});

    auto info = state.store->queryPathInfo(fromPath);

    if (info->isContentAddressed(*state.store)) {
        throw Error(
            {.msg = HintFmt(
                 "The store object referred to by 'fromPath' at '%s' is not input-addressed, but 'inputAddressed' is set to 'true'.\n\n"
                 "Remove the 'inputAddressed' attribute (it defaults to 'false') to expect 'fromPath' to be content-addressed",
                 state.store->printStorePath(fromPath)),
             .pos = state.positions[pos]});
    }

    state.allowClosure(fromPath);

    state.mkStorePathString(fromPath, v);
}

typedef std::optional<StorePath> StorePathOrGap;