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`///@file` makes them show up in the internal API dos. A tiny few were
missing `#pragma once`.
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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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Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
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This allows having multiple separate lockfiles for a single
project, which can be useful for testing against different versions of
nixpkgs; it also allows tracking custom input overrides for remote
flakes without requiring local clones of these flakes.
For example, if I want to build Nix against my locally pinned nixpkgs,
and have a lock file tracking this override independently of future
updates to said nixpkgs:
nix flake lock --output-lock-file /tmp/nix-flake.lock --override-input nixpkgs flake:nixpkgs
nix build --reference-lock-file /tmp/nix-flake.lock
Co-Authored-By: Will Fancher <elvishjerricco@gmail.com>
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It would be incorrect to say that the `sourceInfo` has an `outPath`
that isn't the root. `sourceInfo` is about the root, whereas only
the flake may not be about the root. Thanks Eelco for pointing that
out.
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Users expect `self` to refer to the directory where the `flake.nix`
file resides.
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This reverts commit 9b33ef3879a764bed4cc2404a08344c3a697a646.
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This reverts commit a75b7ba30f1e4f8b15e810fd18e63ee9552e0815, reversing
changes made to 9af16c5f742300e831a2cc400e43df1e22f87f31.
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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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Do this prior to making a new more limitted `OutputPath` we will use in
more places.
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A few little changes preparing for the rest.
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- Add a comment
- Put `OutputsSpec` in a different header (First part of #6815)
- Make a few stray uses of it in new code use `DerivedPath` instead.
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Introduce AbstractPos
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Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
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This makes the position object used in exceptions abstract, with a
method getSource() to get the source code of the file in which the
error originated. This is needed for lazy trees because source files
don't necessarily exist in the filesystem, and we don't want to make
libutil depend on the InputAccessor type in libfetcher.
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Make everything be in the form "while ..." (most things were already),
and in particular *don't* use other propositions that must go after or
before specific "while ..." clauses to make sense.
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Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
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Co-authored-by: Robert Hensing <roberth@users.noreply.github.com>
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Fixes #7186
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Mention `--accept-flake-config` in the related warning
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Make sure that people who run Nix in non-interactive mode (and so don't have the possibility to interactively accept the individual flake configuration settings) are aware of this flag.
Fix #7086
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This reverts commit c530cda345377370c52a616d608de88b9d67cd40, reversing
changes made to 4adcdff5c1d5f9f135c4ec61d690890443c19e6a.
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Line 593 checks that all overrides (i.e. all elements of
`lockFlags.inputOverrides`) are members of `overridesUsed`.
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non-existant -> non-existent
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I recently got fairly confused why the following expression didn't have
any effect
{
description = "Foobar";
inputs.sops-nix = {
url = github:mic92/sops-nix;
inputs.nixpkgs_22_05.follows = "nixpkgs";
};
}
until I found out that the input was called `nixpkgs-22_05` (please note
the dash vs. underscore).
IMHO it's not a good idea to not throw an error in that case and
probably leave end-users rather confused, so I implemented a small check
for that which basically checks whether `follows`-declaration from
overrides actually have corresponding inputs in the transitive flake.
In fact this was done by accident already in our own test-suite where
the removal of a `follows` was apparently forgotten[1].
Since the key of the `std::map` that holds the `overrides` is a vector
and we have to find the last element of each vector (i.e. the override)
this has to be done with a for loop in O(n) complexity with `n` being
the total amount of overrides (which shouldn't be that large though).
Please note that this doesn't work with nested expressions, i.e.
inputs.fenix.inputs.nixpkgs.follows = "...";
which is a known problem[2].
For the expression demonstrated above, an error like this will be
thrown:
error: sops-nix has a `follows'-declaration for a non-existant input nixpkgs_22_05!
[1] 2664a216e57169ec57d7f51be1b8383c1be83fd5
[2] https://github.com/NixOS/nix/issues/5790
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Overrides for inputs with flake=false were non-sticky, since they
changed the `original` in `flake.lock`. This fixes it, by using the same
locked original for both flake and non-flake inputs.
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Do not attempt to write a lock file in builtins.getFlake
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Fixes https://github.com/NixOS/nix/issues/6541
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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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E.g. 'nixpkgs#glibc^dev,static' or 'nixpkgs#glibc^*'.
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this slightly increases the amount of memory used for any given symbol, but this
increase is more than made up for if the symbol is referenced more than once in
the EvalState that holds it. on average every symbol should be referenced at
least twice (once to introduce a binding, once to use it), so we expect no
increase in memory on average.
symbol tables are limited to 2³² entries like position tables, and similar
arguments apply to why overflow is not likely: 2³² symbols would require as many
string instances (at 24 bytes each) and map entries (at 24 bytes or more each,
assuming that the map holds on average at most one item per bucket as the docs
say). a full symbol table would require at least 192GB of memory just for
symbols, which is well out of reach. (an ofborg eval of nixpks today creates
less than a million symbols!)
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