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Fix build against latest Nix master #818

merged 2 commits into from Oct 20, 2020


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@Ma27 Ma27 commented Sep 26, 2020

This PR contains an automatic flake.lock update (2394140) and updates the code in hydra-queue-runner to compile again (
9cc76f6). The details can be found in the commit messages.

cc @edolstra @grahamc @Ericson2314 @lheckemann

Ma27 added 2 commits Sep 26, 2020
Flake input changes:

* Updated 'nix': 'github:NixOS/nix/2a8017092025a7c108ca1a829a8b4f0bcf7ee2c0' -> 'github:NixOS/nix/8b4a542d1767e0df7b3c0902b766f34352cb0958'
* Updated 'nix/lowdown-src': 'github:edolstra/lowdown/c7a4e715af1e233080842db82d15b261cb74cb28' -> 'github:kristapsdz/lowdown/1705b4a26fbf065d9574dce47a94e8c7c79e052f'
* Updated 'nixpkgs': 'github:NixOS/nixpkgs/252bfe0107587d40092057f338e9ffcf7bbd90cb' -> 'github:NixOS/nixpkgs/5659cb448e9b615d642c5fe52779c2223e72f7eb'
Recently a few internal APIs have changed[1]. The `outputPaths` function
has been removed and a lot of data structures are modeled with
`std::optional` which broke compilation.

This patch updates the code in `hydra-queue-runner` accordingly to make
sure that Hydra compiles again.

[1] NixOS/nix#3883
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@Ma27 Ma27 commented Oct 9, 2020

ping @edolstra anything missing to proceed here? :)

@@ -434,7 +434,11 @@ void State::buildRemote(ref<Store> destStore,

auto now1 = std::chrono::steady_clock::now();

auto outputs = step->drv->outputPaths(*localStore);
StorePathSet outputs;
for (auto & i : step->drv->outputsAndOptPaths(*localStore)) {
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@edolstra edolstra Oct 9, 2020

So I was going to suggest using drv->outputsAndPaths() here, but it seems to have disappeared mysteriously. (In a major git fail, git log -p src/libstore/ shows it being added but not being removed...) @Ericson2314 Do you know why it was removed?

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@Ericson2314 Ericson2314 Oct 17, 2020

It might have disappeared in a merge commit; I've noticed git log -G skipping that

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@Ma27 Ma27 Oct 17, 2020

Does it mean that the patch is fine overall?

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@Ericson2314 Ericson2314 Oct 20, 2020

I think this might have been intentionally removed because we didn't want people to unintentionally not support floating CA derivations.

The build-remote protocol needs to be changed for those anyways, so I wouldn't worry for now.

@edolstra edolstra merged commit bea7c25 into NixOS:master Oct 20, 2020
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@Ma27 Ma27 deleted the update-nix-unstable branch Oct 20, 2020
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3 participants