Merge remote-tracking branch 'origin/overhaul-xp-features'

This commit is contained in:
Eelco Dolstra 2021-10-26 14:08:27 +02:00
commit 3155862bae
28 changed files with 188 additions and 61 deletions

View file

@ -18,6 +18,7 @@
#include "derivations.hh"
#include "local-store.hh"
#include "legacy.hh"
#include "experimental-features.hh"
using namespace nix;
using std::cin;
@ -295,7 +296,7 @@ connected:
std::set<Realisation> missingRealisations;
StorePathSet missingPaths;
if (settings.isExperimentalFeatureEnabled("ca-derivations") && !derivationHasKnownOutputPaths(drv.type())) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations) && !derivationHasKnownOutputPaths(drv.type())) {
for (auto & outputName : wantedOutputs) {
auto thisOutputHash = outputHashes.at(outputName);
auto thisOutputId = DrvOutput{ thisOutputHash, outputName };
@ -327,7 +328,7 @@ connected:
for (auto & realisation : missingRealisations) {
// Should hold, because if the feature isn't enabled the set
// of missing realisations should be empty
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
store->registerDrvOutput(realisation);
}

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@ -714,7 +714,7 @@ BuiltPaths getBuiltPaths(ref<Store> evalStore, ref<Store> store, const DerivedPa
"the derivation '%s' doesn't have an output named '%s'",
store->printStorePath(bfd.drvPath), output);
if (settings.isExperimentalFeatureEnabled(
"ca-derivations")) {
Xp::CaDerivations)) {
auto outputId =
DrvOutput{outputHashes.at(output), output};
auto realisation =

View file

@ -466,7 +466,7 @@ EvalState::~EvalState()
void EvalState::requireExperimentalFeatureOnEvaluation(
const std::string & feature,
const ExperimentalFeature & feature,
const std::string_view fName,
const Pos & pos)
{

View file

@ -5,6 +5,7 @@
#include "nixexpr.hh"
#include "symbol-table.hh"
#include "config.hh"
#include "experimental-features.hh"
#include <map>
#include <optional>
@ -141,7 +142,7 @@ public:
~EvalState();
void requireExperimentalFeatureOnEvaluation(
const std::string & feature,
const ExperimentalFeature &,
const std::string_view fName,
const Pos & pos
);

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@ -297,7 +297,7 @@ LockedFlake lockFlake(
const FlakeRef & topRef,
const LockFlags & lockFlags)
{
settings.requireExperimentalFeature("flakes");
settings.requireExperimentalFeature(Xp::Flakes);
FlakeCache flakeCache;
@ -687,7 +687,7 @@ void callFlake(EvalState & state,
static void prim_getFlake(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
state.requireExperimentalFeatureOnEvaluation("flakes", "builtins.getFlake", pos);
state.requireExperimentalFeatureOnEvaluation(Xp::Flakes, "builtins.getFlake", pos);
auto flakeRefS = state.forceStringNoCtx(*args[0], pos);
auto flakeRef = parseFlakeRef(flakeRefS, {}, true);

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@ -418,7 +418,7 @@ expr_simple
new ExprString(data->symbols.create(path)));
}
| URI {
static bool noURLLiterals = settings.isExperimentalFeatureEnabled("no-url-literals");
static bool noURLLiterals = settings.isExperimentalFeatureEnabled(Xp::NoUrlLiterals);
if (noURLLiterals)
throw ParseError({
.msg = hintfmt("URL literals are disabled"),

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@ -985,7 +985,7 @@ static void prim_derivationStrict(EvalState & state, const Pos & pos, Value * *
}
if (i->name == state.sContentAddressed) {
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
contentAddressed = state.forceBool(*i->value, pos);
}

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@ -176,7 +176,7 @@ static void fetchTree(
static void prim_fetchTree(EvalState & state, const Pos & pos, Value * * args, Value & v)
{
settings.requireExperimentalFeature("flakes");
settings.requireExperimentalFeature(Xp::Flakes);
fetchTree(state, pos, args, v, std::nullopt, FetchTreeParams { .allowNameArgument = false });
}

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@ -204,7 +204,7 @@ void DerivationGoal::haveDerivation()
trace("have derivation");
if (drv->type() == DerivationType::CAFloating)
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
retrySubstitution = false;
@ -453,7 +453,7 @@ void DerivationGoal::inputsRealised()
if (useDerivation) {
auto & fullDrv = *dynamic_cast<Derivation *>(drv.get());
if (settings.isExperimentalFeatureEnabled("ca-derivations") &&
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations) &&
((!fullDrv.inputDrvs.empty() && derivationIsCA(fullDrv.type()))
|| fullDrv.type() == DerivationType::DeferredInputAddressed)) {
/* We are be able to resolve this derivation based on the
@ -1273,7 +1273,7 @@ void DerivationGoal::checkPathValidity()
: PathStatus::Corrupt,
};
}
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
auto drvOutput = DrvOutput{initialOutputs.at(i.first).outputHash, i.first};
if (auto real = worker.store.queryRealisation(drvOutput)) {
info.known = {

View file

@ -74,7 +74,7 @@ BuildResult Store::buildDerivation(const StorePath & drvPath, const BasicDerivat
outputId,
Realisation{ outputId, *staticOutput.second}
);
if (settings.isExperimentalFeatureEnabled("ca-derivations") && !derivationHasKnownOutputPaths(drv.type())) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations) && !derivationHasKnownOutputPaths(drv.type())) {
auto realisation = this->queryRealisation(outputId);
if (realisation)
result.builtOutputs.insert_or_assign(

View file

@ -1259,7 +1259,7 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
for (auto & [outputName, outputPath] : outputs)
if (wantOutput(outputName, bfd.outputs)) {
newPaths.insert(outputPath);
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
auto thisRealisation = next->queryRealisation(
DrvOutput{drvHashes.at(outputName), outputName}
);
@ -1320,7 +1320,7 @@ struct RestrictedStore : public virtual RestrictedStoreConfig, public virtual Lo
void LocalDerivationGoal::startDaemon()
{
settings.requireExperimentalFeature("recursive-nix");
settings.requireExperimentalFeature(Xp::RecursiveNix);
Store::Params params;
params["path-info-cache-size"] = "0";
@ -2561,7 +2561,7 @@ void LocalDerivationGoal::registerOutputs()
that for floating CA derivations, which otherwise couldn't be cached,
but it's fine to do in all cases. */
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
for (auto& [outputName, newInfo] : infos) {
auto thisRealisation = Realisation{
.id = DrvOutput{initialOutputs.at(outputName).outputHash,

View file

@ -230,7 +230,7 @@ struct ClientSettings
else if (name == settings.experimentalFeatures.name) {
// We dont want to forward the experimental features to
// the daemon, as that could cause some pretty weird stuff
if (tokenizeString<Strings>(value) != settings.experimentalFeatures.get())
if (parseFeatures(tokenizeString<StringSet>(value)) != settings.experimentalFeatures.get())
debug("Ignoring the client-specified experimental features");
}
else if (trusted

View file

@ -187,7 +187,7 @@ static DerivationOutput parseDerivationOutput(const Store & store,
},
};
} else {
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
assert(pathS == "");
return DerivationOutput {
.output = DerivationOutputCAFloating {

View file

@ -100,7 +100,7 @@ RealisedPath::Set BuiltPath::toRealisedPaths(Store & store) const
staticOutputHashes(store, store.readDerivation(p.drvPath));
for (auto& [outputName, outputPath] : p.outputs) {
if (settings.isExperimentalFeatureEnabled(
"ca-derivations")) {
Xp::CaDerivations)) {
auto thisRealisation = store.queryRealisation(
DrvOutput{drvHashes.at(outputName), outputName});
assert(thisRealisation); // Weve built it, so we must h

View file

@ -160,21 +160,16 @@ StringSet Settings::getDefaultExtraPlatforms()
return extraPlatforms;
}
bool Settings::isExperimentalFeatureEnabled(const std::string & name)
bool Settings::isExperimentalFeatureEnabled(const ExperimentalFeature & feature)
{
auto & f = experimentalFeatures.get();
return std::find(f.begin(), f.end(), name) != f.end();
return std::find(f.begin(), f.end(), feature) != f.end();
}
MissingExperimentalFeature::MissingExperimentalFeature(std::string feature)
: Error("experimental Nix feature '%1%' is disabled; use '--extra-experimental-features %1%' to override", feature)
, missingFeature(feature)
{}
void Settings::requireExperimentalFeature(const std::string & name)
void Settings::requireExperimentalFeature(const ExperimentalFeature & feature)
{
if (!isExperimentalFeatureEnabled(name))
throw MissingExperimentalFeature(name);
if (!isExperimentalFeatureEnabled(feature))
throw MissingExperimentalFeature(feature);
}
bool Settings::isWSL1()

View file

@ -3,6 +3,7 @@
#include "types.hh"
#include "config.hh"
#include "util.hh"
#include "experimental-features.hh"
#include <map>
#include <limits>
@ -45,15 +46,6 @@ struct PluginFilesSetting : public BaseSetting<Paths>
void set(const std::string & str, bool append = false) override;
};
class MissingExperimentalFeature: public Error
{
public:
std::string missingFeature;
MissingExperimentalFeature(std::string feature);
virtual const char* sname() const override { return "MissingExperimentalFeature"; }
};
class Settings : public Config {
unsigned int getDefaultCores();
@ -925,12 +917,12 @@ public:
value.
)"};
Setting<Strings> experimentalFeatures{this, {}, "experimental-features",
Setting<std::set<ExperimentalFeature>> experimentalFeatures{this, {}, "experimental-features",
"Experimental Nix features to enable."};
bool isExperimentalFeatureEnabled(const std::string & name);
bool isExperimentalFeatureEnabled(const ExperimentalFeature &);
void requireExperimentalFeature(const std::string & name);
void requireExperimentalFeature(const ExperimentalFeature &);
Setting<bool> allowDirty{this, true, "allow-dirty",
"Whether to allow dirty Git/Mercurial trees."};

View file

@ -309,7 +309,7 @@ LocalStore::LocalStore(const Params & params)
else openDB(*state, false);
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
migrateCASchema(state->db, dbDir + "/ca-schema", globalLock);
}
@ -339,7 +339,7 @@ LocalStore::LocalStore(const Params & params)
state->stmts->QueryPathFromHashPart.create(state->db,
"select path from ValidPaths where path >= ? limit 1;");
state->stmts->QueryValidPaths.create(state->db, "select path from ValidPaths");
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
state->stmts->RegisterRealisedOutput.create(state->db,
R"(
insert into Realisations (drvPath, outputName, outputPath, signatures)
@ -708,7 +708,7 @@ void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivat
void LocalStore::registerDrvOutput(const Realisation & info, CheckSigsFlag checkSigs)
{
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
if (checkSigs == NoCheckSigs || !realisationIsUntrusted(info))
registerDrvOutput(info);
else
@ -717,7 +717,7 @@ void LocalStore::registerDrvOutput(const Realisation & info, CheckSigsFlag check
void LocalStore::registerDrvOutput(const Realisation & info)
{
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
retrySQLite<void>([&]() {
auto state(_state.lock());
if (auto oldR = queryRealisation_(*state, info.id)) {
@ -1003,7 +1003,7 @@ LocalStore::queryPartialDerivationOutputMap(const StorePath & path_)
return outputs;
});
if (!settings.isExperimentalFeatureEnabled("ca-derivations"))
if (!settings.isExperimentalFeatureEnabled(Xp::CaDerivations))
return outputs;
auto drv = readInvalidDerivation(path);

View file

@ -355,7 +355,7 @@ ValidPathInfo Store::addToStoreSlow(std::string_view name, const Path & srcPath,
StringSet StoreConfig::getDefaultSystemFeatures()
{
auto res = settings.systemFeatures.get();
if (settings.isExperimentalFeatureEnabled("ca-derivations"))
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations))
res.insert("ca-derivations");
return res;
}
@ -860,7 +860,7 @@ std::map<StorePath, StorePath> copyPaths(
for (auto & path : paths) {
storePaths.insert(path.path());
if (auto realisation = std::get_if<Realisation>(&path.raw)) {
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
toplevelRealisations.insert(*realisation);
}
}
@ -892,7 +892,7 @@ std::map<StorePath, StorePath> copyPaths(
// Don't fail if the remote doesn't support CA derivations is it might
// not be within our control to change that, and we might still want
// to at least copy the output paths.
if (e.missingFeature == "ca-derivations")
if (e.missingFeature == Xp::CaDerivations)
ignoreException();
else
throw;

View file

@ -1,6 +1,7 @@
#include "config.hh"
#include "args.hh"
#include "abstract-setting-to-json.hh"
#include "experimental-features.hh"
#include <nlohmann/json.hpp>
@ -313,6 +314,31 @@ template<> std::string BaseSetting<StringSet>::to_string() const
return concatStringsSep(" ", value);
}
template<> void BaseSetting<std::set<ExperimentalFeature>>::set(const std::string & str, bool append)
{
if (!append) value.clear();
for (auto & s : tokenizeString<StringSet>(str)) {
auto thisXpFeature = parseExperimentalFeature(s);
if (thisXpFeature)
value.insert(thisXpFeature.value());
else
warn("Unknown experimental feature %s", s);
}
}
template<> bool BaseSetting<std::set<ExperimentalFeature>>::isAppendable()
{
return true;
}
template<> std::string BaseSetting<std::set<ExperimentalFeature>>::to_string() const
{
StringSet stringifiedXpFeatures;
for (auto & feature : value)
stringifiedXpFeatures.insert(std::string(showExperimentalFeature(feature)));
return concatStringsSep(" ", stringifiedXpFeatures);
}
template<> void BaseSetting<StringMap>::set(const std::string & str, bool append)
{
if (!append) value.clear();
@ -348,6 +374,7 @@ template class BaseSetting<std::string>;
template class BaseSetting<Strings>;
template class BaseSetting<StringSet>;
template class BaseSetting<StringMap>;
template class BaseSetting<std::set<ExperimentalFeature>>;
void PathSetting::set(const std::string & str, bool append)
{

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@ -0,0 +1,55 @@
#include "experimental-features.hh"
#include "nlohmann/json.hpp"
namespace nix {
std::map<ExperimentalFeature, std::string> stringifiedXpFeatures = {
{ Xp::CaDerivations, "ca-derivations" },
{ Xp::Flakes, "flakes" },
{ Xp::NixCommand, "nix-command" },
{ Xp::RecursiveNix, "recursive-nix" },
{ Xp::NoUrlLiterals, "no-url-literals" },
};
const std::optional<ExperimentalFeature> parseExperimentalFeature(const std::string_view & name)
{
using ReverseXpMap = std::map<std::string_view, ExperimentalFeature>;
static ReverseXpMap * reverseXpMap;
if (!reverseXpMap) {
reverseXpMap = new ReverseXpMap{};
for (auto & [feature, name] : stringifiedXpFeatures)
(*reverseXpMap)[name] = feature;
}
auto featureIter = reverseXpMap->find(name);
if (featureIter == reverseXpMap->end())
return std::nullopt;
return {featureIter->second};
}
std::string_view showExperimentalFeature(const ExperimentalFeature feature)
{
return stringifiedXpFeatures.at(feature);
}
std::set<ExperimentalFeature> parseFeatures(const std::set<std::string> & rawFeatures)
{
std::set<ExperimentalFeature> res;
for (auto & rawFeature : rawFeatures) {
if (auto feature = parseExperimentalFeature(rawFeature))
res.insert(*feature);
}
return res;
}
MissingExperimentalFeature::MissingExperimentalFeature(ExperimentalFeature feature)
: Error("experimental Nix feature '%1%' is disabled; use '--extra-experimental-features %1%' to override", showExperimentalFeature(feature))
, missingFeature(feature)
{}
std::ostream & operator <<(std::ostream & str, const ExperimentalFeature & feature)
{
return str << showExperimentalFeature(feature);
}
}

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@ -0,0 +1,56 @@
#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, dont forget to also change the map defining their
* string representation in the corresponding `.cc` file.
**/
enum struct ExperimentalFeature
{
CaDerivations,
Flakes,
NixCommand,
RecursiveNix,
NoUrlLiterals
};
/**
* 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);
virtual const char * sname() const override
{
return "MissingExperimentalFeature";
}
};
}

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@ -401,7 +401,7 @@ static void main_nix_build(int argc, char * * argv)
if (dryRun) return;
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
auto resolvedDrv = drv.tryResolve(*store);
assert(resolvedDrv && "Successfully resolved the derivation");
drv = *resolvedDrv;

View file

@ -195,7 +195,7 @@ static StorePath getDerivationEnvironment(ref<Store> store, ref<Store> evalStore
'buildDerivation', but that's privileged. */
drv.name += "-env";
drv.inputSrcs.insert(std::move(getEnvShPath));
if (settings.isExperimentalFeatureEnabled("ca-derivations")) {
if (settings.isExperimentalFeatureEnabled(Xp::CaDerivations)) {
for (auto & output : drv.outputs) {
output.second = {
.output = DerivationOutputDeferred{},

View file

@ -1138,7 +1138,7 @@ struct CmdFlake : NixMultiCommand
{
if (!command)
throw UsageError("'nix flake' requires a sub-command.");
settings.requireExperimentalFeature("flakes");
settings.requireExperimentalFeature(Xp::Flakes);
command->second->prepare();
command->second->run();
}

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@ -337,7 +337,7 @@ void mainWrapped(int argc, char * * argv)
if (args.command->first != "repl"
&& args.command->first != "doctor"
&& args.command->first != "upgrade-nix")
settings.requireExperimentalFeature("nix-command");
settings.requireExperimentalFeature(Xp::NixCommand);
if (args.useNet && !haveInternet()) {
warn("you don't have Internet access; disabling some network-dependent features");

View file

@ -46,7 +46,7 @@ struct CmdRealisationInfo : BuiltPathsCommand, MixJSON
void run(ref<Store> store, BuiltPaths && paths) override
{
settings.requireExperimentalFeature("ca-derivations");
settings.requireExperimentalFeature(Xp::CaDerivations);
RealisedPath::Set realisations;
for (auto & builtPath : paths) {

View file

@ -219,7 +219,7 @@ struct CmdKey : NixMultiCommand
{
if (!command)
throw UsageError("'nix flake' requires a sub-command.");
settings.requireExperimentalFeature("flakes");
settings.requireExperimentalFeature(Xp::Flakes);
command->second->prepare();
command->second->run();
}

View file

@ -50,4 +50,4 @@ exp_cores=$(nix show-config | grep '^cores' | cut -d '=' -f 2 | xargs)
exp_features=$(nix show-config | grep '^experimental-features' | cut -d '=' -f 2 | xargs)
[[ $prev != $exp_cores ]]
[[ $exp_cores == "4242" ]]
[[ $exp_features == "nix-command flakes" ]]
[[ $exp_features == "flakes nix-command" ]]