61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#pragma once
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#include "store-api.hh"
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#include "goal.hh"
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#include "realisation.hh"
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#include <thread>
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#include <future>
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namespace nix {
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class Worker;
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// Substitution of a derivation output.
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// This is done in three steps:
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// 1. Fetch the output info from a substituter
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// 2. Substitute the corresponding output path
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// 3. Register the output info
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class DrvOutputSubstitutionGoal : public Goal {
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private:
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// The drv output we're trying to substitue
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DrvOutput id;
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// The realisation corresponding to the given output id.
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// Will be filled once we can get it.
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std::shared_ptr<const Realisation> outputInfo;
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/* The remaining substituters. */
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std::list<ref<Store>> subs;
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/* The current substituter. */
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std::shared_ptr<Store> sub;
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Pipe outPipe;
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std::thread thr;
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std::promise<std::shared_ptr<const Realisation>> promise;
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/* Whether a substituter failed. */
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bool substituterFailed = false;
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public:
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DrvOutputSubstitutionGoal(const DrvOutput& id, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
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typedef void (DrvOutputSubstitutionGoal::*GoalState)();
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GoalState state;
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void init();
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void tryNext();
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void realisationFetched();
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void outPathValid();
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void finished();
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void timedOut(Error && ex) override { abort(); };
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std::string key() override;
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void work() override;
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void handleEOF(int fd) override;
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};
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}
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