eldritch horrors
89e99d94e4
Combine `AbstractPos`, `PosAdapter`, and `Pos`
(cherry picked from commit 113499d16fc87d53b73fb62fe6242154909756ed)
===
this is a bit cursed because originally it was based on InputAccessor
code that we don't have and moved/patched features we likewise don't
have (fetchToStore caching, all the individual accessors,
ContentAddressMethod). the commit is adjusted accordingly to
match (remove caching, ignore accessors, use FileIngestionMethod).
note that `state.rootPath . CanonPath == abs` and
computeStorePathForPath works relative to cwd, so the slight rewrite in
the moved fetchToStore is legal.
Change-Id: I05fd340c273f0bcc8ffabfebdc4a88b98083bce5
69 lines
2 KiB
C++
69 lines
2 KiB
C++
#include "installable-value.hh"
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#include "eval-cache.hh"
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#include "fetch-to-store.hh"
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namespace nix {
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std::vector<ref<eval_cache::AttrCursor>>
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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,
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[&]() { return toValue(state).first; });
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return {evalCache->getRoot()};
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}
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ref<eval_cache::AttrCursor>
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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> 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->store, v.path());
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return {{
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.path = 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(
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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 return std::nullopt;
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}
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}
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