forked from lix-project/lix
6267d74889
This replaces "nix-instantiate --eval". The result is evaluated strictly since this seems more useful.
45 lines
1 KiB
C++
45 lines
1 KiB
C++
#include "command.hh"
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#include "common-args.hh"
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#include "installables.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "eval.hh"
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#include "json.hh"
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#include "value-to-json.hh"
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using namespace nix;
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struct CmdEval : MixJSON, MixInstallables
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{
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std::string name() override
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{
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return "eval";
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}
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std::string description() override
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{
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return "evaluate a Nix expression";
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}
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void run(ref<Store> store) override
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{
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auto state = getEvalState();
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auto jsonOut = json ? std::make_unique<JSONList>(std::cout) : nullptr;
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for (auto & i : installables) {
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auto v = i->toValue(*state);
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if (json) {
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PathSet context;
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auto jsonElem = jsonOut->placeholder();
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printValueAsJSON(*state, true, *v, jsonElem, context);
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} else {
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state->forceValueDeep(*v);
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std::cout << *v << "\n";
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}
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}
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}
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};
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static RegisterCommand r1(make_ref<CmdEval>());
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