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https://github.com/NixOS/nix.git
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e4f62e4608
* It is tough to contribute to a project that doesn't use a formatter, * It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files * Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose, Let's rip the bandaid off? Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge.
67 lines
2.1 KiB
C++
67 lines
2.1 KiB
C++
#include "nix/cmd/installable-value.hh"
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#include "nix/expr/eval-cache.hh"
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#include "nix/fetchers/fetch-to-store.hh"
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namespace nix {
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std::vector<ref<eval_cache::AttrCursor>> InstallableValue::getCursors(EvalState & state)
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{
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auto evalCache =
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std::make_shared<nix::eval_cache::EvalCache>(std::nullopt, state, [&]() { return toValue(state).first; });
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return {evalCache->getRoot()};
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}
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ref<eval_cache::AttrCursor> InstallableValue::getCursor(EvalState & state)
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{
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/* Although getCursors should return at least one element, in case it doesn't,
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bound check to avoid an undefined behavior for vector[0] */
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return getCursors(state).at(0);
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}
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static UsageError nonValueInstallable(Installable & installable)
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{
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return UsageError("installable '%s' does not correspond to a Nix language value", installable.what());
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}
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InstallableValue & InstallableValue::require(Installable & installable)
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{
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auto * castedInstallable = dynamic_cast<InstallableValue *>(&installable);
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if (!castedInstallable)
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throw nonValueInstallable(installable);
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return *castedInstallable;
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}
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ref<InstallableValue> InstallableValue::require(ref<Installable> installable)
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{
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auto castedInstallable = installable.dynamic_pointer_cast<InstallableValue>();
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if (!castedInstallable)
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throw nonValueInstallable(*installable);
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return ref{castedInstallable};
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}
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std::optional<DerivedPathWithInfo>
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InstallableValue::trySinglePathToDerivedPaths(Value & v, const PosIdx pos, std::string_view errorCtx)
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{
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if (v.type() == nPath) {
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auto storePath = fetchToStore(state->fetchSettings, *state->store, v.path(), FetchMode::Copy);
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return {{
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.path =
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DerivedPath::Opaque{
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.path = std::move(storePath),
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},
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.info = make_ref<ExtraPathInfo>(),
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}};
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}
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else if (v.type() == nString) {
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return {{
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.path = DerivedPath::fromSingle(state->coerceToSingleDerivedPath(pos, v, errorCtx)),
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.info = make_ref<ExtraPathInfo>(),
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}};
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}
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else
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return std::nullopt;
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}
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} // namespace nix
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