Nix 2.28 was the last release packaged with the monolithic
common-meson.nix expression and is no longer maintained upstream.
Drop it together with the now-unused common-meson.nix and nix-perl.nix
helpers and the storeDir/stateDir/confDir plumbing that only fed
that code path.
This ensures that `lib.platforms.darwin` doesn’t include
`x86_64-darwin` and that the unsupported platform check will trigger
even once the bespoke deprecation error is removed. It doesn’t break
`lib.systems.elaborate "x86_64-darwin"`.
- Improve extractItem error messages: distinguish non-attrset elements
from multi-key attrsets, and include the faulty definition via showDefs.
- Use isType instead of raw _type access for order detection.
- Disable type merging (typeMerge = t: null) instead of providing a
functor-based merge. Add test confirming duplicate declarations fail.
This allows the type's return value to be accessed more easily.
Motivating use case:
- Built-in module provides CLI functionality by declaring
an `attrListWith { asAttrs = true; }`, extracting the ordered list
from `valueMeta` for the purpose of creating the `argv`.
- User modules can read the command line's flags directly without
having to parse the list of attrs.
This adds a type for name-value mappings that preserve ordering.
Motivating use case: command line flags for package modules /
wrappers / modular services.
The option value can be transformed into a command line in the
correct order.
Additionally, a convenience readOnly option could be provided
to give easy introspection access to the values in an ad hoc
manner.
Add sh4 CPU type (32-bit, little-endian, family "sh"), isSh4 predicate,
"sh4-linux" system double, cross-compilation example (sh4-unknown-linux-gnu),
linuxArch mapping to "sh", and test entry.
`emptyValue` for `types.submodule` was `{ value = { }; }`, i.e. none
of the type-declared options or their defaults.
Previously submodules without defs would simply fail for lack of a default,
but since PR #500104 repurposed `emptyValue` as the fallback when no
definitions exist, submodule options without an explicit `default = { }`
(new additions) silently lost their sub-option defaults
(e.g. `requiredFeatures.devnet` in the nixos-test-driver, #511413).
Main change: `emptyValue`: `{ }` -> `{ value = base.config; }`
Additionally, skip `emptyValue`-based default rendering in docs for
types with submodules, because their sub-options are already documented
individually, and forcing evaluation here can break on modules with
invalid or incomplete definitions.
Add arc CPU type (32-bit, little-endian, family "arc"), isArc
predicate, arc-linux double, arc cross example with
arc-unknown-linux-gnu triple, and release-cross job.
ARC has glibc support and uses the "arc" Linux kernel arch, which
matches the CPU name so no explicit linuxArch mapping is needed.
Downstream types that want to use `lib.types.defaultTypeMerge` must include
`wrapped` even though it is deprecated or the internal
`wrappedDeprecationMessage`. This is caused by accessing the
`wrapped` attr in `lib.types.defaultTypeMerge`. The logic should first check
if the attr exists and then if it does check if it is null.
It's very easy to resort to lib.take + lib.drop to accomplish this, but it's not obvious that it actually performs quite badly.
Replacing an item in a list should be a relative common operation.
Previously `lib.strings.escapeNixIdentifier "assert"` would return `"assert"`; This is wrong, `assert` is not a valid identifier unless quoted.\
This also fixes `lib.generators.toPretty`: `toPretty {} { "assert" = false; }` would previously return an invalid expression.
