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https://github.com/NixOS/nix
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c998e0172f
These methods would previously fail on the other `Installable`s, so moving them to this class is more correct as to where they actually work. Additionally, a `InstallableValueCommand` is created to make it easier (or rather no worse than before) to write commands that just work on `InstallableValue`s. Besides being a cleanup to avoid failing default methods, this gets us closer to https://github.com/NixOS/rfcs/pull/134.
44 lines
1.1 KiB
C++
44 lines
1.1 KiB
C++
#pragma once
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#include "installables.hh"
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namespace nix {
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struct App
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{
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std::vector<DerivedPath> context;
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Path program;
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// FIXME: add args, sandbox settings, metadata, ...
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};
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struct UnresolvedApp
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{
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App unresolved;
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App resolve(ref<Store> evalStore, ref<Store> store);
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};
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struct InstallableValue : Installable
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{
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ref<EvalState> state;
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InstallableValue(ref<EvalState> state) : state(state) {}
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virtual std::pair<Value *, PosIdx> toValue(EvalState & state) = 0;
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/* Get a cursor to each value this Installable could refer to. However
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if none exists, throw exception instead of returning empty vector. */
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virtual std::vector<ref<eval_cache::AttrCursor>>
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getCursors(EvalState & state);
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/* Get the first and most preferred cursor this Installable could refer
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to, or throw an exception if none exists. */
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virtual ref<eval_cache::AttrCursor>
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getCursor(EvalState & state);
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UnresolvedApp toApp(EvalState & state);
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static InstallableValue & require(Installable & installable);
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static ref<InstallableValue> require(ref<Installable> installable);
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};
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}
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