mirror of
https://github.com/NixOS/nix
synced 2025-06-25 10:41:16 +02:00
89 lines
2.4 KiB
C++
89 lines
2.4 KiB
C++
#pragma once
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///@file
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#include "common-eval-args.hh"
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#include "installable-value.hh"
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namespace nix {
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/**
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* Extra info about a \ref DerivedPath "derived path" that ultimately
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* come from a Flake.
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*
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* Invariant: every ExtraPathInfo gotten from an InstallableFlake should
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* be possible to downcast to an ExtraPathInfoFlake.
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*/
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struct ExtraPathInfoFlake : ExtraPathInfoValue
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{
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/**
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* Extra struct to get around C++ designated initializer limitations
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*/
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struct Flake {
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FlakeRef originalRef;
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FlakeRef lockedRef;
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};
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Flake flake;
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ExtraPathInfoFlake(Value && v, Flake && f)
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: ExtraPathInfoValue(std::move(v)), flake(std::move(f))
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{ }
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};
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struct InstallableFlake : InstallableValue
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{
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FlakeRef flakeRef;
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Strings attrPaths;
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Strings prefixes;
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ExtendedOutputsSpec extendedOutputsSpec;
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const flake::LockFlags & lockFlags;
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mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
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InstallableFlake(
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SourceExprCommand * cmd,
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ref<EvalState> state,
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FlakeRef && flakeRef,
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std::string_view fragment,
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ExtendedOutputsSpec extendedOutputsSpec,
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Strings attrPaths,
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Strings prefixes,
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const flake::LockFlags & lockFlags);
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std::string what() const override { return flakeRef.to_string() + "#" + *attrPaths.begin(); }
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std::vector<std::string> getActualAttrPaths();
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DerivedPathsWithInfo toDerivedPaths() override;
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std::pair<Value *, PosIdx> toValue(EvalState & state) override;
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/**
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* Get a cursor to every attrpath in getActualAttrPaths() that
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* exists. However if none exists, throw an exception.
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*/
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std::vector<ref<eval_cache::AttrCursor>>
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getCursors(EvalState & state) override;
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std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
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FlakeRef nixpkgsFlakeRef() const;
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};
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/**
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* Default flake ref for referring to Nixpkgs. For flakes that don't
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* have their own Nixpkgs input, or other installables.
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*
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* It is a layer violation for Nix to know about Nixpkgs; currently just
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* `nix develop` does. Be wary of using this /
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* `InstallableFlake::nixpkgsFlakeRef` more places.
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*/
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static inline FlakeRef defaultNixpkgsFlakeRef()
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{
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return FlakeRef::fromAttrs(fetchSettings, {{"type","indirect"}, {"id", "nixpkgs"}});
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}
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ref<eval_cache::EvalCache> openEvalCache(
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EvalState & state,
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std::shared_ptr<flake::LockedFlake> lockedFlake);
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}
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