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'build-remote' is now executed via /proc/self/exe so it always works.
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To quote Eelco in #5867:
> Unfortunately we can't do
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> evalSettings.pureEval.setDefault(false);
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> because then we have to do the same in main.cc (where
> pureEval is set to true), and that would allow pure-eval
> to be disabled globally from nix.conf.
Instead, a command should specify that it should be impure by
default. Then, `evalSettings.pureEval` will be set to `false;` unless
it's overridden by e.g. a CLI flag.
In that case it's IMHO OK to be (theoretically) able to override
`pure-eval` via `nix.conf` because it doesn't have an effect on commands
where `forceImpureByDefault` returns `false` (i.e. everything where pure
eval actually matters).
Closes #5867
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Ensures the logger is stopped on exit in legacy commands. Without this,
when using `nix-build --log-format bar` and stopping nix with CTRL+C,
the bar is not cleared from the screen.
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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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experimental feature is enabled
This allows writing fallback code like
if builtins ? fetchClosure then
builtins.fetchClose { ... }
else
builtins.storePath ...
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make-content-addressed'
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This has been unused since 170e86dff5724264e0d3d25b9af1bd42df6aec74
CC @thufschmitt
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When stderr is not connected to a tty, show "building" and
"substituting" messages, a-la nix-build et al.
Closes https://github.com/NixOS/nix/issues/4402
Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
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Previously you had to remember to call value->attrs->sort() after
populating value->attrs. Now there is a BindingsBuilder helper that
wraps Bindings and ensures that sort() is called before you can use
it.
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This prevents Nix from barfing when run in a container where it
doesn't have the appropriate privileges.
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Doing it as a side-effect of calling LocalStore::makeStoreWritable()
is very ugly.
Also, make sure that stopping the progress bar joins the update
thread, otherwise that thread should be unshared as well.
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Rather than having them plain strings scattered through the whole
codebase, create an enum containing all the known experimental features.
This means that
- Nix can now `warn` when an unkwown experimental feature is passed
(making it much nicer to spot typos and spot deprecated features)
- It’s now easy to remove a feature altogether (once the feature isn’t
experimental anymore or is dropped) by just removing the field for the
enum and letting the compiler point us to all the now invalid usages
of it.
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Fixes #5337.
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Fixes #4476.
Fixes #5231.
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Fixes #4673.
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Fixes #4671.
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This is technically a breaking change, since attempting to set plugin
files after the first non-flag argument will now throw an error. This
is acceptable given the relative lack of stability in a plugin
interface and the need to tie the knot somewhere once plugins can
actually define new subcommands.
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Workaround for #4550.
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Fixes #3743.
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This is like syslog's LOG_NOTICE: "normal, but significant,
condition".
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This only differs from 'nix store dump-path' in that the path doesn't
need to be a store path.
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Make nix output completions in the form `completion\tdescription`.
This can't be used by bash (afaik), but other shells like zsh or fish
can display it along the completion choices
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DummyStore does not allow building or adding paths. This is useful for
evaluation tests when you don't want to initialize a "proper" store.
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