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nixos: move default module location logic to `eval-config.nix`
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Change comment type so than nixdoc picks them up into Nixpkgs manual.
Also improve phrasing a bit and move stuff around so that it is formatted better.
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C-style comment was being picked up by nixdoc as a documentation comment for the function.
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Wraps a module with a default location for reporting errors.
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nixos: Add `system.build.`{`toplevel`,`installBootLoader`}, improve error message
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Couldn't extend types.uniq and it had a silly name anyway.
Now we can have better error messages.
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lib/options: Add mkPackageOption
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This is a squashed commit. These are the original commit messages:
lib/option: Improve comment
better comment
Update documentation
Updated nixos/doc/manual/development/options-declarations.md with info on mkEnableOption and mkPackageOption.
Updated the comment on mkEnableOption in lib/options.nix
remove trailing whitespace
nixos/doc/option-declarations: Update IDs & formatting
nixos/docs/option-declarations: Escape angle brackets
Build DB from MD
(Amended) Fix typo
Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
(Amended) Build DB from MD (again)
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This is a squashed commit. These are the original commit messages:
lib/options: Add mkPackageOption
lib/options: Add missing semicolon
lib/options.nix: Make mkPackageOption more complicated
lib/options: Fix indent. & spacing
lib/options.nix: Remove example and align comment
lib/options: ravenous overuse of arguments
lib/options: Format better
lib/options: Add default examplePath decl
lib/options: Make better mkPackageOption function
lib/options: Remove trailing whitespace
lib/options: Improve mkPackageOptions
lib/options: Remove pkgs prefixing
Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
lib/options: Slim down mkPackageOption further
lib/options: mkPackageOption: Add "pkgs." to example
lib/options: mkPackageOption: Make name & pkgs single arguments
lib/options: mkPackageOption: Swap name & pkgs
lib/options: Remove unnecessary import
Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
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types.singleLineStr: strings that don't contain '\n'
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Co-authored-by: pennae <82953136+pennae@users.noreply.github.com>
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Allow a \n character at the end of the string and remove it during the
merge function.
An option of this type will resolve to the value "foo" whether it is set
to "foo" or "foo\n".
This is useful when using 'builtins.readFile' or ''-strings, which might
add an unintended newline (for example, bash trim the final newline from
a subshell).
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`assert` has the annoying property that it dumps a lot of code at the
user without the built in capability to display a nicer message. We have
worked around this using `assertMsg` which would *additionally* display
a nice message. We can do even better: By using `throw` we can make
evaluation fail before assert draws its conclusions and prevent it from
displaying the code making up the assert condition, so we get the nicer
message of `throw` and the syntactical convenience of `assert`.
Before:
nix-repl> python.override { reproducibleBuild = true; stripBytecode = false; }
trace: Deterministic builds require stripping bytecode.
error: assertion (((lib).assertMsg (reproducibleBuild -> stripBytecode)) "Deterministic builds require stripping bytecode.") failed at /home/lukas/src/nix/nixpkgs/pkgs/development/interpreters/python/cpython/2.7/default.nix:45:1
After:
nix-repl> python.override { reproducibleBuild = true; stripBytecode = false; }
error: Deterministic builds require stripping bytecode.
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Add a new type, inheriting 'types.str' but checking whether the value
doesn't contain any newline characters.
The motivation comes from a problem with the
'users.users.${u}.openssh.authorizedKeys' option.
It is easy to unintentionally insert a newline character at the end of a
string, or even in the middle, for example:
restricted_ssh_keys = command: keys:
let
prefix = ''
command="${command}",no-pty,no-agent-forwarding,no-port-forwarding,no-X11-forwarding
'';
in map (key: "${prefix} ${key}") keys;
The 'prefix' string ends with a newline, which ends up in the middle of
a key entry after a few manipulations.
This is problematic because the key file is built by concatenating all
the keys with 'concatStringsSep "\n"', with result in two entries for
the faulty key:
''
command="...",options...
MY_KEY
''
This is hard to debug and might be dangerous. This is now caught at
build time.
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lib/attrset: various function optimizations
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lib/modules: optimize byName
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Check nixpkgs overlays argument types
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most modules can be evaluated for their documentation in a very
restricted environment that doesn't include all of nixpkgs. this
evaluation can then be cached and reused for subsequent builds, merging
only documentation that has changed into the cached set. since nixos
ships with a large number of modules of which only a few are used in any
given config this can save evaluation a huge percentage of nixos
options available in any given config.
in tests of this caching, despite having to copy most of nixos/, saves
about 80% of the time needed to build the system manual, or about two
second on the machine used for testing. build time for a full system
config shrank from 9.4s to 7.4s, while turning documentation off
entirely shortened the build to 7.1s.
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module.${attr} is used at least twice, so it must be evaluated at least
twice (and since it's a function argument, be turned into a thunk
twice).
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- Eta reduce `mapAttrsRecursiveCond`, `foldAttrs`, `getAttrFromPath`.
- Modify `matchAttrs` to use `elemAt` instead of `head (tail xs)` to access
elements.
- Modify `matchAttrs` to use `any id` instead of `foldr and true`.
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- Eta reduce formal arguments of `recursiveUpdate'.
- Access elements in `recursiveUpdateUntil` using `elemAt` and `head`
directly instead of `head (tail xs)` which copies a singleton unnecessarily.
(`elemAt` is used instead of `last` to save a primitive call to `length`,
this is possible because the 2-tuple structure is guranteed)
- Use `length` instead of comparison to empty list to save a copy.
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the foldl is equivalent to a zip with concat. list concatenation in nix
is an O(n) operation, which makes this operation extremely inefficient
when large numbers of modules are involved.
this change reduces the number of list elements by 7 million on the
system used to write this, total memory spent on lists by 58MB, and
total memory allocated on the GC heap by almost 100MB (with a similar
reduction in GC heap size). it's also slightly faster.
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treewide: more defaultText for options
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While it is a fact of life that aarch64-darwin is built on Hydra, it has
never formally been elevated from the Tier 7 state it was originally
assigned in RFC 0046. Since platform Tier status is not only
descriptive, but also normative, a consensus to commit to supporting
aarch64-darwin would need to be reached.
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`builtins.currentSystem` is not available in pure eval. For this
particular test, we don't really care since it's all about generating
.drv files.
Fixes the following error:
$ nix flake check
warning: unknown flake output 'lib'
error: attribute 'currentSystem' missing
at /nix/store/8wvnlbjxlr90kq2qa6d9zjpj8rqkilr5-source/lib/tests/misc.nix:499:73:
498| let
499| deriv = derivation { name = "test"; builder = "/bin/sh"; system = builtins.currentSystem; };
| ^
500| in {
(use '--show-trace' to show detailed location informat
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pkgsCross.aarch64be-embedded: fix eval
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lib/modules: Short-circuit unmatchedDefns when configs is empty
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lib/meta: add getLicenseFromSpdxId function (resumed)
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Move function spdxLicense, internally used in yarn2nix
to lib/meta.nix, and
rename to getLicenseFromSpdxId
A similar function is implemented in poetry2nix,
but the one originally in yarn2nix seems beter.
since it falls back to an license-like attrset
for mismatched case
instead of a plain string
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For consistency.
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Strengthens the tests by making sure the whole line is matched.
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Makes any programming errors more likely to show up early.
Non-obvious changes because of this:
- Ignore the `evalConfig` result in `reportFailure`; we're not checking
it at that point.
- Pre-increment `$fail` and `$pass` to make sure the arithmetic doesn't
result in a zero, which would result in a non-zero exit code for the
expression.
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The exit codes aren't used for anything.
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As per <https://github.com/koalaman/shellcheck/wiki/SC2124>.
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The extra equal sign was confusing, and doesn't seem to be relevant.
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