lix/src/libstore/derived-path.cc
2024-03-04 07:32:31 +01:00

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#include "derived-path.hh"
#include "store-api.hh"
#include <nlohmann/json.hpp>
#include <optional>
namespace nix {
#define CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, COMPARATOR) \
bool MY_TYPE ::operator COMPARATOR (const MY_TYPE & other) const \
{ \
const MY_TYPE* me = this; \
auto fields1 = std::tie(*me->drvPath, me->FIELD); \
me = &other; \
auto fields2 = std::tie(*me->drvPath, me->FIELD); \
return fields1 COMPARATOR fields2; \
}
#define CMP(CHILD_TYPE, MY_TYPE, FIELD) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, ==) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, !=) \
CMP_ONE(CHILD_TYPE, MY_TYPE, FIELD, <)
CMP(SingleDerivedPath, SingleDerivedPathBuilt, output)
CMP(SingleDerivedPath, DerivedPathBuilt, outputs)
#undef CMP
#undef CMP_ONE
nlohmann::json DerivedPath::Opaque::toJSON(const Store & store) const
{
return store.printStorePath(path);
}
nlohmann::json SingleDerivedPath::Built::toJSON(Store & store) const {
nlohmann::json res;
res["drvPath"] = drvPath->toJSON(store);
// Fallback for the input-addressed derivation case: We expect to always be
// able to print the output paths, so lets do it
// FIXME try-resolve on drvPath
const auto outputMap = store.queryPartialDerivationOutputMap(resolveDerivedPath(store, *drvPath));
res["output"] = output;
auto outputPathIter = outputMap.find(output);
if (outputPathIter == outputMap.end())
res["outputPath"] = nullptr;
else if (std::optional p = outputPathIter->second)
res["outputPath"] = store.printStorePath(*p);
else
res["outputPath"] = nullptr;
return res;
}
nlohmann::json DerivedPath::Built::toJSON(Store & store) const {
nlohmann::json res;
res["drvPath"] = drvPath->toJSON(store);
// Fallback for the input-addressed derivation case: We expect to always be
// able to print the output paths, so lets do it
// FIXME try-resolve on drvPath
const auto outputMap = store.queryPartialDerivationOutputMap(resolveDerivedPath(store, *drvPath));
for (const auto & [output, outputPathOpt] : outputMap) {
if (!outputs.contains(output)) continue;
if (outputPathOpt)
res["outputs"][output] = store.printStorePath(*outputPathOpt);
else
res["outputs"][output] = nullptr;
}
return res;
}
nlohmann::json SingleDerivedPath::toJSON(Store & store) const
{
return std::visit([&](const auto & buildable) {
return buildable.toJSON(store);
}, raw());
}
nlohmann::json DerivedPath::toJSON(Store & store) const
{
return std::visit([&](const auto & buildable) {
return buildable.toJSON(store);
}, raw());
}
std::string DerivedPath::Opaque::to_string(const Store & store) const
{
return store.printStorePath(path);
}
std::string SingleDerivedPath::Built::to_string(const Store & store) const
{
return drvPath->to_string(store) + "^" + output;
}
std::string SingleDerivedPath::Built::to_string_legacy(const Store & store) const
{
return drvPath->to_string(store) + "!" + output;
}
std::string DerivedPath::Built::to_string(const Store & store) const
{
return drvPath->to_string(store)
+ '^'
+ outputs.to_string();
}
std::string DerivedPath::Built::to_string_legacy(const Store & store) const
{
return drvPath->to_string_legacy(store)
+ "!"
+ outputs.to_string();
}
std::string SingleDerivedPath::to_string(const Store & store) const
{
return std::visit(
[&](const auto & req) { return req.to_string(store); },
raw());
}
std::string DerivedPath::to_string(const Store & store) const
{
return std::visit(
[&](const auto & req) { return req.to_string(store); },
raw());
}
std::string SingleDerivedPath::to_string_legacy(const Store & store) const
{
return std::visit(overloaded {
[&](const SingleDerivedPath::Built & req) { return req.to_string_legacy(store); },
[&](const SingleDerivedPath::Opaque & req) { return req.to_string(store); },
}, this->raw());
}
std::string DerivedPath::to_string_legacy(const Store & store) const
{
return std::visit(overloaded {
[&](const DerivedPath::Built & req) { return req.to_string_legacy(store); },
[&](const DerivedPath::Opaque & req) { return req.to_string(store); },
}, this->raw());
}
DerivedPath::Opaque DerivedPath::Opaque::parse(const Store & store, std::string_view s)
{
return {store.parseStorePath(s)};
}
void drvRequireExperiment(
const SingleDerivedPath & drv,
const ExperimentalFeatureSettings & xpSettings)
{
std::visit(overloaded {
[&](const SingleDerivedPath::Opaque &) {
// plain drv path; no experimental features required.
},
[&](const SingleDerivedPath::Built &) {
xpSettings.require(Xp::DynamicDerivations);
},
}, drv.raw());
}
SingleDerivedPath::Built SingleDerivedPath::Built::parse(
const Store & store, ref<SingleDerivedPath> drv,
OutputNameView output,
const ExperimentalFeatureSettings & xpSettings)
{
drvRequireExperiment(*drv, xpSettings);
return {
.drvPath = drv,
.output = std::string { output },
};
}
DerivedPath::Built DerivedPath::Built::parse(
const Store & store, ref<SingleDerivedPath> drv,
OutputNameView outputsS,
const ExperimentalFeatureSettings & xpSettings)
{
drvRequireExperiment(*drv, xpSettings);
return {
.drvPath = drv,
.outputs = OutputsSpec::parse(outputsS),
};
}
static SingleDerivedPath parseWithSingle(
const Store & store, std::string_view s, std::string_view separator,
const ExperimentalFeatureSettings & xpSettings)
{
size_t n = s.rfind(separator);
return n == s.npos
? (SingleDerivedPath) SingleDerivedPath::Opaque::parse(store, s)
: (SingleDerivedPath) SingleDerivedPath::Built::parse(store,
make_ref<SingleDerivedPath>(parseWithSingle(
store,
s.substr(0, n),
separator,
xpSettings)),
s.substr(n + 1),
xpSettings);
}
SingleDerivedPath SingleDerivedPath::parse(
const Store & store,
std::string_view s,
const ExperimentalFeatureSettings & xpSettings)
{
return parseWithSingle(store, s, "^", xpSettings);
}
SingleDerivedPath SingleDerivedPath::parseLegacy(
const Store & store,
std::string_view s,
const ExperimentalFeatureSettings & xpSettings)
{
return parseWithSingle(store, s, "!", xpSettings);
}
static DerivedPath parseWith(
const Store & store, std::string_view s, std::string_view separator,
const ExperimentalFeatureSettings & xpSettings)
{
size_t n = s.rfind(separator);
return n == s.npos
? (DerivedPath) DerivedPath::Opaque::parse(store, s)
: (DerivedPath) DerivedPath::Built::parse(store,
make_ref<SingleDerivedPath>(parseWithSingle(
store,
s.substr(0, n),
separator,
xpSettings)),
s.substr(n + 1),
xpSettings);
}
DerivedPath DerivedPath::parse(
const Store & store,
std::string_view s,
const ExperimentalFeatureSettings & xpSettings)
{
return parseWith(store, s, "^", xpSettings);
}
DerivedPath DerivedPath::parseLegacy(
const Store & store,
std::string_view s,
const ExperimentalFeatureSettings & xpSettings)
{
return parseWith(store, s, "!", xpSettings);
}
DerivedPath DerivedPath::fromSingle(const SingleDerivedPath & req)
{
return std::visit(overloaded {
[&](const SingleDerivedPath::Opaque & o) -> DerivedPath {
return o;
},
[&](const SingleDerivedPath::Built & b) -> DerivedPath {
return DerivedPath::Built {
.drvPath = b.drvPath,
.outputs = OutputsSpec::Names { b.output },
};
},
}, req.raw());
}
const StorePath & SingleDerivedPath::Built::getBaseStorePath() const
{
return drvPath->getBaseStorePath();
}
const StorePath & DerivedPath::Built::getBaseStorePath() const
{
return drvPath->getBaseStorePath();
}
template<typename DP>
static inline const StorePath & getBaseStorePath_(const DP & derivedPath)
{
return std::visit(overloaded {
[&](const typename DP::Built & bfd) -> auto & {
return bfd.drvPath->getBaseStorePath();
},
[&](const typename DP::Opaque & bo) -> auto & {
return bo.path;
},
}, derivedPath.raw());
}
const StorePath & SingleDerivedPath::getBaseStorePath() const
{
return getBaseStorePath_(*this);
}
const StorePath & DerivedPath::getBaseStorePath() const
{
return getBaseStorePath_(*this);
}
}