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This makes it more useful. In general, the derivation will be in one
store, and the realisation info is in another.
This also helps us avoid duplication. See how `resolveDerivedPath` is
now simpler because it uses `queryPartialDerivationOutputMap`. In #8369
we get more flavors of derived path, and need more code to resolve them
all, and this problem only gets worse.
The fact that we need a new method to deal with the multiple dispatch is
unfortunate, but this generally relates to the fact that `Store` is a
sub-par interface, too bulky/unwieldy and conflating separate concerns.
Solving that is out of scope of this PR.
This is part of the RFC 92 work. See tracking issue #6316
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Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
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In other words, use a plain `ContentAddress` not
`ContentAddressWithReferences` for `DerivationOutput::CAFixed`.
Supporting fixed output derivations with (fixed) references would be a
cool feature, but it is out of scope at this moment.
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This is needed in subsequent commits to allow the settings and CLI args
infrastructure itself to read this setting.
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`&` without space before is far more common on this codebase than I
thought, so it is not worth changing just this one file. Maybe we will
adopt a formatter someday but until then this is fine.
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Failure: https://hydra.nixos.org/build/205357257/nixlog/1
The problem seems to be trying to `std::visit` a derived class of
`std::variant`. Per
https://stackoverflow.com/questions/63616709/incomplete-type-stdvariant-used-in-nested-name-specifier
certain C++ standard library implementations allow this, but others do
not.
The solution is simply to call the `raw` method, which upcasts the
reference back to the `std::variant`.
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This change can wait for another PR.
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This should be a non-empty set, and so we don't want people doing this
by accident. We remove the zero-0 constructor with a little inheritance
trickery.
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`DerivedPath::Built` and `DerivationGoal` were previously using a
regular set with the convention that the empty set means all outputs.
But it is easy to forget about this rule when processing those sets.
Using `OutputSpec` forces us to get it right.
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- `PathReferences` -> `References`
- `PathReferences<StorePath>` -> `StoreReference`
- `references` -> `others`
- `hasSelfReference` -> `self`
And get rid of silly subclassing
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Use one of `get` or `getOr` instead which will either return a null-pointer (with a nicer error message) or a default value when the key is missing.
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1. `DerivationOutput` now as the `std::variant` as a base class. And the
variants are given hierarchical names under `DerivationOutput`.
In 8e0d0689be797f9e42f9b43b06f50c1af7f20b4a @matthewbauer and I
didn't know a better idiom, and so we made it a field. But this sort
of "newtype" is anoying for literals downstream.
Since then we leaned the base class, inherit the constructors trick,
e.g. used in `DerivedPath`. Switching to use that makes this more
ergonomic, and consistent.
2. `store-api.hh` and `derivations.hh` are now independent.
In bcde5456cc3295061a0726881c3e441444dd6680 I swapped the dependency,
but I now know it is better to just keep on using incomplete types as
much as possible for faster compilation and good separation of
concerns.
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This is a temporary hack until we make queryMissing() async.
Closes #5324.
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I had started the trend of doing `std::visit` by value (because a type
error once mislead me into thinking that was the only form that
existed). While the optomizer in principle should be able to deal with
extra coppying or extra indirection once the lambdas inlined, sticking
with by reference is the conventional default. I hope this might even
improve performance.
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Make `computeFSClosure` ca-aware
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Rather than copying them around everywhere
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
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That doesn’t really make sense with CA derivations (and wasn’t even
really correct before because of FO derivations, though that probably
didn’t matter much in practice)
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Fix #4820 by preventing nix-collect garbage from crashing if
`keep-outputs` or `keep-derivations` is true
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Move the `closure` logic of `computeFSClosure` to its own (templated) function.
This doesn’t bring much by itself (except for the ability to properly
test the “closure” functionality independently from the rest), but it
allows reusing it (in particular for the realisations which will require
a very similar closure computation)
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