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#pragma once
#include "args.hh"
#include "command.hh"
namespace nix {
struct Value;
class EvalState;
class Expr;
struct Installable
{
virtual std::string what() = 0;
virtual PathSet toBuildable()
{
throw Error("argument ‘%s’ cannot be built", what());
}
virtual Value * toValue(EvalState & state)
{
throw Error("argument ‘%s’ cannot be evaluated", what());
}
};
struct MixInstallables : virtual Args, StoreCommand
{
std::vector<std::shared_ptr<Installable>> installables;
Path file;
MixInstallables()
{
mkFlag('f', "file", "file", "evaluate FILE rather than the default", &file);
expectArgs("installables", &_installables);
}
/* Return a value representing the Nix expression from which we
are installing. This is either the file specified by ‘--file’,
or an attribute set constructed from $NIX_PATH, e.g. ‘{ nixpkgs
= import ...; bla = import ...; }’. */
Value * getSourceExpr(EvalState & state);
std::vector<std::shared_ptr<Installable>> parseInstallables(ref<Store> store, Strings installables);
PathSet buildInstallables(ref<Store> store, bool dryRun);
ref<EvalState> getEvalState();
void prepare() override;
private:
Strings _installables;
std::shared_ptr<EvalState> evalState;
Value * vSourceExpr = 0;
};
}
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