For a long time, we've had `crossLibcStdenv`, `*Cross` libc attributes,
and `*bsdCross` pre-libc package sets. This was always bad because
having "cross" things is "not declarative": the naming doesn't reflect
what packages *need* but rather how we *provide* something. This is
ugly, and creates needless friction between cross and native building.
Now, almost all of these `*Cross` attributes are gone: just these are
kept:
- Glibc's and Musl's are kept, because those packages are widely used
and I didn't want to risk changing the native builds of those at this
time.
- generic `libcCross`, `theadsCross`, and friends, because these relate
to the convolulted GCC bootstrap which still needs to be redone.
The BSD and obscure Linux or freestnanding libcs have conversely all
been made to use a new `stdenvNoLibc`, which is like the old
`crossLibcStdenv` except:
1. It usable for native and cross alike
2. It named according to what it *is* ("a standard environment without
libc but with a C compiler"), rather than some non-compositional
jargon ("the stdenv used for building libc when cross compiling",
yuck).
I should have done this change long ago, but I was stymied because of
"infinite recursions". The problem was that in too many cases we are
overriding `stdenv` to *remove* things we don't need, and this risks
cyles since those more minimal stdenvs are used to build things in the
more maximal stdenvs.
The solution is to pass `stage.nix` `stdenvNoCC`, so we can override to
*build up* rather than *tear down*. For now, the full `stdenv` is also
passed, so I don't need to change the native bootstraps, but I can see
this changing as we make things more uniform and clean those up.
(adapted from commit 51f1ecaa59)
(adapted from commit 1743662e55)
After this change, enableParallelBuilding defaults to true for packages
using buildDotnetModule. The argument value already defaults to true,
but we did not use it. Note that default values in Nix are not present
in the arguments attribute set, e.g. `args` does not contain `def` for
`{ def ? true }@args: …` function unless this argument is explicitly
passed.
Previously, it wasn't possible to access the list of platforms we can
build Rust programs for outside of buildRustPackage. This was a
problem for packages that have optional Rust components, like
gstreamer or Meson, as there was no way to only build the Rust parts
for supported platforms. Now it's possible to get that information
from rustc's passthru.
Before an overlay in the form of:
package.overrideAttrs (old: {
passthru = {};
})
would fail evaluation like:
error: attribute 'overrideModAttrs' missing
at /nix/store/afwc3m1sm49qq57xjv2hmd7iy4x0j33h-source/pkgs/build-support/go/module.nix:179:20:
178| outputHashAlgo = if finalAttrs.vendorHash == "" then "sha256" else null;
179| }).overrideAttrs finalAttrs.passthru.overrideModAttrs;
| ^
180|
Now instead we take the fallback default.
We should constrain the set of supported platforms to the platforms
supported by the compiler. Otherwise we run into the unfortunate
situation where setting meta.platforms in a Rust package to
platforms.unix or platforms.linux will reintroduce CPU architectures
unsupported by the compiler.
`importNpmLock.buildNodeModules` returns a derivation with a pre-built `node_modules` directory, as imported by `importNpmLock`.
This is to be used together with `importNpmLock.hooks.linkNodeModulesHook` to facilitate `nix-shell`/`nix develop` based development workflows:
```nix
pkgs.mkShell {
packages = [
importNpmLock.hooks.linkNodeModulesHook
nodejs
];
npmDeps = importNpmLock.buildNodeModules {
npmRoot = ./.;
inherit nodejs;
};
}
```
will create a development shell where a `node_modules` directory is created & packages symlinked to the Nix store when activated.
This code is adapted from https://github.com/adisbladis/buildNodeModules
Rationale: Since RFCs 140 and 146, the old category-based hierarchy is
deprecated and obsolete, and a new approach took place: packages should be as
self-contained as possible.
This paradigm is reflected in many new strict checks that prohibit a package to
refer to files outside its directory tree.
Following this spirit, this commit essentially moves nixpkgs
pkgs/test/default.nix to ./tests/default.nix.
Further, to keep the top-level `tests` attribute, a green alias is kept in the
place of older file.
