810b2c6a48
The initial contents of the flake is specified by the
'templates.<name>' or 'defaultTemplate' output of another flake. E.g.
outputs = { self }: {
templates = {
nixos-container = {
path = ./nixos-container;
description = "An example of a NixOS container";
};
};
};
allows
$ nix flake init -t templates#nixos-container
Also add a command 'nix flake new', which is identical to 'nix flake
init' except that it initializes a specified directory rather than the
current directory.
128 lines
3.1 KiB
C++
128 lines
3.1 KiB
C++
#pragma once
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#include "util.hh"
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#include "path.hh"
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#include "eval.hh"
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#include "flake/flake.hh"
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#include <optional>
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namespace nix {
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struct DrvInfo;
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struct SourceExprCommand;
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namespace eval_cache { class EvalCache; class AttrCursor; }
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struct Buildable
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{
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std::optional<StorePath> drvPath;
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std::map<std::string, StorePath> outputs;
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};
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typedef std::vector<Buildable> Buildables;
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struct App
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{
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PathSet context;
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Path program;
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// FIXME: add args, sandbox settings, metadata, ...
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App(EvalState & state, Value & vApp);
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};
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struct Installable
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{
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virtual ~Installable() { }
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virtual std::string what() = 0;
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virtual Buildables toBuildables() = 0;
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Buildable toBuildable();
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App toApp(EvalState & state);
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virtual std::pair<Value *, Pos> toValue(EvalState & state)
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{
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throw Error("argument '%s' cannot be evaluated", what());
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}
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/* Return a value only if this installable is a store path or a
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symlink to it. */
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virtual std::optional<StorePath> getStorePath()
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{
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return {};
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}
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virtual std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
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getCursors(EvalState & state, bool useEvalCache);
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std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>
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getCursor(EvalState & state, bool useEvalCache);
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virtual FlakeRef nixpkgsFlakeRef() const
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{
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return std::move(FlakeRef::fromAttrs({{"type","indirect"}, {"id", "nixpkgs"}}));
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}
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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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struct DerivationInfo
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{
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StorePath drvPath;
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StorePath outPath;
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std::string outputName;
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};
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virtual std::vector<DerivationInfo> toDerivations() = 0;
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Buildables toBuildables() override;
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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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const flake::LockFlags & lockFlags;
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mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
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InstallableFlake(ref<EvalState> state, FlakeRef && flakeRef,
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Strings && attrPaths, Strings && prefixes, const flake::LockFlags & lockFlags)
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: InstallableValue(state), flakeRef(flakeRef), attrPaths(attrPaths),
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prefixes(prefixes), lockFlags(lockFlags)
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{ }
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std::string what() override { return flakeRef.to_string() + "#" + *attrPaths.begin(); }
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std::vector<std::string> getActualAttrPaths();
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Value * getFlakeOutputs(EvalState & state, const flake::LockedFlake & lockedFlake);
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std::tuple<std::string, FlakeRef, DerivationInfo> toDerivation();
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std::vector<DerivationInfo> toDerivations() override;
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std::pair<Value *, Pos> toValue(EvalState & state) override;
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std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
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getCursors(EvalState & state, bool useEvalCache) override;
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std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
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FlakeRef nixpkgsFlakeRef() const override;
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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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bool useEvalCache);
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}
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