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Call lockFlake once and store in _lockedFlake

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This commit is contained in:
Matthew Kenigsberg 2020-05-12 23:45:45 -06:00
parent 04821bc171
commit 0858793604
2 changed files with 16 additions and 7 deletions
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20
src/nix/installables.cc
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@ -408,8 +408,7 @@ ref<eval_cache::EvalCache> openEvalCache(
std::tuple<std::string, FlakeRef, InstallableValue::DerivationInfo> InstallableFlake::toDerivation()
{
auto lockedFlake = std::make_shared<flake::LockedFlake>(
lockFlake(*state, flakeRef, lockFlags));
auto lockedFlake = getLockedFlake();
auto cache = openEvalCache(*state, lockedFlake, true);
auto root = cache->getRoot();
@ -455,9 +454,9 @@ std::vector<InstallableValue::DerivationInfo> InstallableFlake::toDerivations()
std::pair<Value *, Pos> InstallableFlake::toValue(EvalState & state)
{
auto lockedFlake = lockFlake(state, flakeRef, lockFlags);
auto lockedFlake = getLockedFlake();
auto vOutputs = getFlakeOutputs(state, lockedFlake);
auto vOutputs = getFlakeOutputs(state, *lockedFlake);
auto emptyArgs = state.allocBindings(0);
@ -493,12 +492,19 @@ InstallableFlake::getCursor(EvalState & state, bool useEvalCache)
return res;
}
std::shared_ptr<flake::LockedFlake> InstallableFlake::getLockedFlake() const
{
if (!_lockedFlake)
_lockedFlake = std::make_shared<flake::LockedFlake>(lockFlake(*state, flakeRef, lockFlags));
return _lockedFlake;
}
FlakeRef InstallableFlake::nixpkgsFlakeRef() const
{
auto lockedFlake = lockFlake(*(cmd.getEvalState()), flakeRef, cmd.lockFlags);
auto lockedFlake = getLockedFlake();
auto nixpkgsInput = lockedFlake.flake.inputs.find("nixpkgs");
if (nixpkgsInput != lockedFlake.flake.inputs.end()) {
auto nixpkgsInput = lockedFlake->flake.inputs.find("nixpkgs");
if (nixpkgsInput != lockedFlake->flake.inputs.end()) {
return std::move(nixpkgsInput->second.ref);
}

3
src/nix/installables.hh
View file

@ -88,6 +88,7 @@ struct InstallableFlake : InstallableValue
Strings attrPaths;
Strings prefixes;
const flake::LockFlags & lockFlags;
mutable std::shared_ptr<flake::LockedFlake> _lockedFlake;
InstallableFlake(ref<EvalState> state, FlakeRef && flakeRef,
Strings && attrPaths, Strings && prefixes, const flake::LockFlags & lockFlags)
@ -110,6 +111,8 @@ struct InstallableFlake : InstallableValue
std::vector<std::pair<std::shared_ptr<eval_cache::AttrCursor>, std::string>>
getCursor(EvalState & state, bool useEvalCache) override;
std::shared_ptr<flake::LockedFlake> getLockedFlake() const;
FlakeRef nixpkgsFlakeRef() const override;
};