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#pragma once
///@file
#include "lock.hh"
#include "store-api.hh"
#include "goal.hh"
namespace nix {
class Worker;
struct PathSubstitutionGoal : public Goal
{
/**
* The store path that should be realised through a substitute.
*/
StorePath storePath;
/**
* The path the substituter refers to the path as. This will be
* different when the stores have different names.
*/
std::optional<StorePath> subPath;
/**
* The remaining substituters.
*/
std::list<ref<Store>> subs;
/**
* The current substituter.
*/
std::shared_ptr<Store> sub;
/**
* Whether a substituter failed.
*/
bool substituterFailed = false;
/**
* Path info returned by the substituter's query info operation.
*/
std::shared_ptr<const ValidPathInfo> info;
/**
* Pipe for the substituter's standard output.
*/
Pipe outPipe;
/**
* The substituter thread.
*/
std::thread thr;
std::promise<void> promise;
/**
* Whether to try to repair a valid path.
*/
RepairFlag repair;
/**
* Location where we're downloading the substitute. Differs from
* storePath when doing a repair.
*/
Path destPath;
std::unique_ptr<MaintainCount<uint64_t>> maintainExpectedSubstitutions,
maintainRunningSubstitutions, maintainExpectedNar, maintainExpectedDownload;
typedef void (PathSubstitutionGoal::*GoalState)();
GoalState state;
/**
* Content address for recomputing store path
*/
std::optional<ContentAddress> ca;
void done(
ExitCode result,
BuildResult::Status status,
std::optional<std::string> errorMsg = {});
public:
PathSubstitutionGoal(const StorePath & storePath, Worker & worker, RepairFlag repair = NoRepair, std::optional<ContentAddress> ca = std::nullopt);
~PathSubstitutionGoal();
void timedOut(Error && ex) override { abort(); };
/**
* We prepend "a$" to the key name to ensure substitution goals
* happen before derivation goals.
*/
std::string key() override
{
return "a$" + std::string(storePath.name()) + "$" + worker.store.printStorePath(storePath);
}
void work() override;
/**
* The states.
*/
void init();
void tryNext();
void gotInfo();
void referencesValid();
void tryToRun();
void finished();
/**
* Callback used by the worker to write to the log.
*/
void handleChildOutput(int fd, std::string_view data) override;
void handleEOF(int fd) override;
void cleanup() override;
};
}
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