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Automatic UID allocation
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in order to avoid potential problems with the progress bar
Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
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Example:
# nix build -L --extra-experimental-features cgroups --impure --expr 'with import <nixpkgs> {}; runCommand "foo" {} "dd if=/dev/urandom bs=1M count=1024 | md5sum; mkdir $out"' --json
[
{
"cpuSystem": 1.911431,
"cpuUser": 1.214249,
"drvPath": "/nix/store/xzdqz67xba18hljhycp0hwfigzrs2z69-foo.drv",
"outputs": {
"out": "/nix/store/rh9mc9l2gkpq8kn2sgzndr6ll7ffjh6l-foo"
},
"startTime": 1669024076,
"stopTime": 1669024079
}
]
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Example:
# nix build -L --extra-experimental-features cgroups --impure --expr 'with import <nixpkgs> {}; runCommand "foo" {} "dd if=/dev/urandom bs=1M count=1024 | md5sum; mkdir $out"' --json
[
{
"cpuSystem": 1.911431,
"cpuUser": 1.214249,
"drvPath": "/nix/store/xzdqz67xba18hljhycp0hwfigzrs2z69-foo.drv",
"outputs": {
"out": "/nix/store/rh9mc9l2gkpq8kn2sgzndr6ll7ffjh6l-foo"
},
"startTime": 1669024076,
"stopTime": 1669024079
}
]
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Temporarily disable the debugger during completion evaluation
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Completing things that would error would print an ugly error in
the middle of your command line. Avoid printing this error.
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readline is not re-entrant, so entering the debugger from the
completioncallback results in an eventual segfault.
The workaround is to temporarily disable the debugger when searching
for possible completions.
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The description of the --profile option talks about the "update" operation.
This is probably meant for operations such as "nix profile install", but the
same option is reused in other subcommands, which do not update the profile,
such as "nix profile {list,history,diff-closures}".
We update the description to make sense in both contexts.
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This unclutters the per-command options a bit by moving out some
global options.
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The history is not critical to the functionality of nix repl, so it's
enough to warn here, rather than refuse to start if the directory Nix
thinks the history should live in can't be created.
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do not render relative links in help pages
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this simplifies the setup a lot, and avoids weird looking `./file.md`
links showing up.
it also does not show regular URLs any more. currently the command
reference only has few of them, and not showing them in the offline
documentation is hopefully not a big deal.
instead of building more special-case solutions, clumsily preprocessing
the input, or issuing verbal rules on dealing with URLs, should better
be solved sustainably by not rendering relative links in `lowdown`:
https://github.com/kristapsdz/lowdown/issues/105
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The repl was broken since c3769c68465bae971ab6bb48cfcdea85b61ea83a. In
general, the progress bar is incompatible with the repl.
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Improve shell completion of flake inputs
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Defers completion of flake inputs until the whole command line is parsed
so that we know what flakes we need to complete the inputs of.
Previously, `nix build flake --update-input <Tab>` always behaved like
`nix build . --update-input <Tab>`.
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Nix repl flakes
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virusdave/dnicponski/scratch/dont_capture_stdout_in_nix_repl_master
Don't capture `stdout` when launching subshells in `nix repl`
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Allow `nix build flake1 flake2 --update-input <Tab>` to complete the
inputs of both flakes.
Also do tilde expansion so that `nix build ~/flake --update-input <Tab>`
works.
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respect print-missing variable in new-style build command
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repl: `--option pure-eval true` actually enables pure eval mode
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Right now this is not mentioned anywhere and it is unexpected.
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Currently nix-build prints the "printMissing" information by default,
nix build doesn’t.
People generally don‘t notice this because the standard log-format of
nix build would not display the printMissing
output long enough to perceive the information.
This addresses https://github.com/NixOS/nix/issues/6561
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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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E.g. 'nix build nixpkgs#libxml2.dev' will build the 'dev' output.
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Co-authored-by: Eelco Dolstra <edolstra@gmail.com>
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