forked from lix-project/lix
15f7fa59be
Adds a new boolean structured attribute
`outputChecks.<output>.unsafeDiscardReferences` which disables scanning
an output for runtime references.
__structuredAttrs = true;
outputChecks.out.unsafeDiscardReferences = true;
This is useful when creating filesystem images containing their own embedded Nix
store: they are self-contained blobs of data with no runtime dependencies.
Setting this attribute requires the experimental feature
`discard-references` to be enabled.
66 lines
1.5 KiB
C++
66 lines
1.5 KiB
C++
#pragma once
|
||
|
||
#include "comparator.hh"
|
||
#include "error.hh"
|
||
#include "nlohmann/json_fwd.hpp"
|
||
#include "types.hh"
|
||
|
||
namespace nix {
|
||
|
||
/**
|
||
* The list of available experimental features.
|
||
*
|
||
* If you update this, don’t forget to also change the map defining their
|
||
* string representation in the corresponding `.cc` file.
|
||
**/
|
||
enum struct ExperimentalFeature
|
||
{
|
||
CaDerivations,
|
||
ImpureDerivations,
|
||
Flakes,
|
||
NixCommand,
|
||
RecursiveNix,
|
||
NoUrlLiterals,
|
||
FetchClosure,
|
||
ReplFlake,
|
||
AutoAllocateUids,
|
||
Cgroups,
|
||
DiscardReferences,
|
||
};
|
||
|
||
/**
|
||
* Just because writing `ExperimentalFeature::CaDerivations` is way too long
|
||
*/
|
||
using Xp = ExperimentalFeature;
|
||
|
||
const std::optional<ExperimentalFeature> parseExperimentalFeature(
|
||
const std::string_view & name);
|
||
std::string_view showExperimentalFeature(const ExperimentalFeature);
|
||
|
||
std::ostream & operator<<(
|
||
std::ostream & str,
|
||
const ExperimentalFeature & feature);
|
||
|
||
/**
|
||
* Parse a set of strings to the corresponding set of experimental features,
|
||
* ignoring (but warning for) any unkwown feature.
|
||
*/
|
||
std::set<ExperimentalFeature> parseFeatures(const std::set<std::string> &);
|
||
|
||
class MissingExperimentalFeature : public Error
|
||
{
|
||
public:
|
||
ExperimentalFeature missingFeature;
|
||
|
||
MissingExperimentalFeature(ExperimentalFeature);
|
||
};
|
||
|
||
/**
|
||
* Semi-magic conversion to and from json.
|
||
* See the nlohmann/json readme for more details.
|
||
*/
|
||
void to_json(nlohmann::json &, const ExperimentalFeature &);
|
||
void from_json(const nlohmann::json &, ExperimentalFeature &);
|
||
|
||
}
|