nix-super/flake.nix
Robert Hensing e28e6b96bb flake.nix: Tidy packages build matrix code
flatMapAttrs is easier to read because it introduces the values
before using them, kind of like a `let` bindings with multiple
values.

The repeated comments remind the reader of the purpose of the
innermost attrsets, which is actually very simple.
Knowing that they go right into the result should help a lot
with building a mental model for this pattern.
2024-06-26 02:03:21 +02:00

491 lines
18 KiB
Nix

{
description = "The purely functional package manager";
# TODO switch to nixos-23.11-small
# https://nixpk.gs/pr-tracker.html?pr=291954
inputs.nixpkgs.url = "github:NixOS/nixpkgs/release-24.05";
inputs.nixpkgs-regression.url = "github:NixOS/nixpkgs/215d4d0fd80ca5163643b03a33fde804a29cc1e2";
inputs.nixpkgs-23-11.url = "github:NixOS/nixpkgs/a62e6edd6d5e1fa0329b8653c801147986f8d446";
inputs.flake-compat = { url = "github:edolstra/flake-compat"; flake = false; };
inputs.libgit2 = { url = "github:libgit2/libgit2"; flake = false; };
# dev tooling
inputs.flake-parts.url = "github:hercules-ci/flake-parts";
inputs.pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
# work around https://github.com/NixOS/nix/issues/7730
inputs.flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
inputs.pre-commit-hooks.inputs.nixpkgs.follows = "nixpkgs";
inputs.pre-commit-hooks.inputs.nixpkgs-stable.follows = "nixpkgs";
# work around 7730 and https://github.com/NixOS/nix/issues/7807
inputs.pre-commit-hooks.inputs.flake-compat.follows = "";
inputs.pre-commit-hooks.inputs.gitignore.follows = "";
outputs = inputs@{ self, nixpkgs, nixpkgs-regression, libgit2, ... }:
let
inherit (nixpkgs) lib;
inherit (lib) fileset;
officialRelease = false;
version = lib.fileContents ./.version + versionSuffix;
versionSuffix =
if officialRelease
then ""
else "pre${builtins.substring 0 8 (self.lastModifiedDate or self.lastModified or "19700101")}_${self.shortRev or "dirty"}";
linux32BitSystems = [ "i686-linux" ];
linux64BitSystems = [ "x86_64-linux" "aarch64-linux" ];
linuxSystems = linux32BitSystems ++ linux64BitSystems;
darwinSystems = [ "x86_64-darwin" "aarch64-darwin" ];
systems = linuxSystems ++ darwinSystems;
crossSystems = [
"armv6l-unknown-linux-gnueabihf"
"armv7l-unknown-linux-gnueabihf"
"riscv64-unknown-linux-gnu"
"x86_64-unknown-netbsd"
"x86_64-unknown-freebsd"
"x86_64-w64-mingw32"
];
stdenvs = [
"ccacheStdenv"
"clangStdenv"
"gccStdenv"
"libcxxStdenv"
"stdenv"
];
/**
`flatMapAttrs attrs f` applies `f` to each attribute in `attrs` and
merges the results into a single attribute set.
This can be nested to form a build matrix where all the attributes
generated by the innermost `f` are returned as is.
(Provided that the names are unique.)
See https://nixos.org/manual/nixpkgs/stable/index.html#function-library-lib.attrsets.concatMapAttrs
*/
flatMapAttrs = attrs: f: lib.concatMapAttrs f attrs;
forAllSystems = lib.genAttrs systems;
forAllCrossSystems = lib.genAttrs crossSystems;
forAllStdenvs = f:
lib.listToAttrs
(map
(stdenvName: {
name = "${stdenvName}Packages";
value = f stdenvName;
})
stdenvs);
# We don't apply flake-parts to the whole flake so that non-development attributes
# load without fetching any development inputs.
devFlake = inputs.flake-parts.lib.mkFlake { inherit inputs; } {
imports = [ ./maintainers/flake-module.nix ];
systems = lib.subtractLists crossSystems systems;
perSystem = { system, ... }: {
_module.args.pkgs = nixpkgsFor.${system}.native;
};
};
# Memoize nixpkgs for different platforms for efficiency.
nixpkgsFor = forAllSystems
(system: let
make-pkgs = crossSystem: stdenv: import nixpkgs {
localSystem = {
inherit system;
};
crossSystem = if crossSystem == null then null else {
config = crossSystem;
} // lib.optionalAttrs (crossSystem == "x86_64-unknown-freebsd13") {
useLLVM = true;
};
overlays = [
(overlayFor (p: p.${stdenv}))
];
};
stdenvs = forAllStdenvs (make-pkgs null);
native = stdenvs.stdenvPackages;
in {
inherit stdenvs native;
static = native.pkgsStatic;
cross = forAllCrossSystems (crossSystem: make-pkgs crossSystem "stdenv");
});
binaryTarball = nix: pkgs: pkgs.callPackage ./scripts/binary-tarball.nix {
inherit nix;
};
overlayFor = getStdenv: final: prev:
let
stdenv = getStdenv final;
in
{
nixStable = prev.nix;
default-busybox-sandbox-shell = final.busybox.override {
useMusl = true;
enableStatic = true;
enableMinimal = true;
extraConfig = ''
CONFIG_FEATURE_FANCY_ECHO y
CONFIG_FEATURE_SH_MATH y
CONFIG_FEATURE_SH_MATH_64 y
CONFIG_ASH y
CONFIG_ASH_OPTIMIZE_FOR_SIZE y
CONFIG_ASH_ALIAS y
CONFIG_ASH_BASH_COMPAT y
CONFIG_ASH_CMDCMD y
CONFIG_ASH_ECHO y
CONFIG_ASH_GETOPTS y
CONFIG_ASH_INTERNAL_GLOB y
CONFIG_ASH_JOB_CONTROL y
CONFIG_ASH_PRINTF y
CONFIG_ASH_TEST y
'';
};
libgit2-nix = final.libgit2.overrideAttrs (attrs: {
src = libgit2;
version = libgit2.lastModifiedDate;
cmakeFlags = attrs.cmakeFlags or []
++ [ "-DUSE_SSH=exec" ];
});
boehmgc-nix = final.boehmgc.override {
enableLargeConfig = true;
};
libseccomp-nix = final.libseccomp.overrideAttrs (_: rec {
version = "2.5.5";
src = final.fetchurl {
url = "https://github.com/seccomp/libseccomp/releases/download/v${version}/libseccomp-${version}.tar.gz";
hash = "sha256-JIosik2bmFiqa69ScSw0r+/PnJ6Ut23OAsHJqiX7M3U=";
};
});
# TODO: define everything here instead of top level?
nix-components = {
inherit (final)
nix-util
nix-util-test-support
nix-util-test
nix-util-c
nix-store
nix-fetchers
nix-perl-bindings
;
};
nix-util = final.callPackage ./src/libutil/package.nix {
inherit
fileset
stdenv
officialRelease
versionSuffix
;
};
nix-util-test-support = final.callPackage ./tests/unit/libutil-support/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix-util-test = final.callPackage ./tests/unit/libutil/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix-util-c = final.callPackage ./src/libutil-c/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix-store = final.callPackage ./src/libstore/package.nix {
inherit
fileset
stdenv
officialRelease
versionSuffix
;
libseccomp = final.libseccomp-nix;
busybox-sandbox-shell = final.busybox-sandbox-shell or final.default-busybox-sandbox-shell;
};
nix-fetchers = final.callPackage ./src/libfetchers/package.nix {
inherit
fileset
stdenv
officialRelease
versionSuffix
;
};
nix =
final.callPackage ./package.nix {
inherit
fileset
stdenv
officialRelease
versionSuffix
;
boehmgc = final.boehmgc-nix;
libgit2 = final.libgit2-nix;
libseccomp = final.libseccomp-nix;
busybox-sandbox-shell = final.busybox-sandbox-shell or final.default-busybox-sandbox-shell;
};
nix-perl-bindings = final.callPackage ./src/perl/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix-internal-api-docs = final.callPackage ./src/internal-api-docs/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix-external-api-docs = final.callPackage ./src/external-api-docs/package.nix {
inherit
fileset
stdenv
versionSuffix
;
};
nix_noTests = final.nix.override {
doCheck = false;
doInstallCheck = false;
installUnitTests = false;
};
# See https://github.com/NixOS/nixpkgs/pull/214409
# Remove when fixed in this flake's nixpkgs
pre-commit =
if prev.stdenv.hostPlatform.system == "i686-linux"
then (prev.pre-commit.override (o: { dotnet-sdk = ""; })).overridePythonAttrs (o: { doCheck = false; })
else prev.pre-commit;
};
in {
# A Nixpkgs overlay that overrides the 'nix' and
# 'nix-perl-bindings' packages.
overlays.default = overlayFor (p: p.stdenv);
hydraJobs = import ./maintainers/hydra.nix {
inherit
inputs
binaryTarball
forAllCrossSystems
forAllSystems
lib
linux64BitSystems
nixpkgsFor
self
;
};
checks = forAllSystems (system: {
binaryTarball = self.hydraJobs.binaryTarball.${system};
installTests = self.hydraJobs.installTests.${system};
nixpkgsLibTests = self.hydraJobs.tests.nixpkgsLibTests.${system};
rl-next =
let pkgs = nixpkgsFor.${system}.native;
in pkgs.buildPackages.runCommand "test-rl-next-release-notes" { } ''
LANG=C.UTF-8 ${pkgs.changelog-d}/bin/changelog-d ${./doc/manual/rl-next} >$out
'';
repl-completion = nixpkgsFor.${system}.native.callPackage ./tests/repl-completion.nix { };
} // (lib.optionalAttrs (builtins.elem system linux64BitSystems)) {
dockerImage = self.hydraJobs.dockerImage.${system};
} // (lib.optionalAttrs (!(builtins.elem system linux32BitSystems))) {
# Some perl dependencies are broken on i686-linux.
# Since the support is only best-effort there, disable the perl
# bindings
# Temporarily disabled because GitHub Actions OOM issues. Once
# the old build system is gone and we are back to one build
# system, we should reenable this.
#perlBindings = self.hydraJobs.perlBindings.${system};
}
# Add "passthru" tests
// flatMapAttrs ({
"" = nixpkgsFor.${system}.native;
} // lib.optionalAttrs (! nixpkgsFor.${system}.native.stdenv.hostPlatform.isDarwin) {
# TODO: enable static builds for darwin, blocked on:
# https://github.com/NixOS/nixpkgs/issues/320448
"static-" = nixpkgsFor.${system}.static;
})
(nixpkgsPrefix: nixpkgs:
flatMapAttrs nixpkgs.nix-components
(pkgName: pkg:
flatMapAttrs pkg.tests or {}
(testName: test: {
"${nixpkgsPrefix}${pkgName}-${testName}" = test;
})
)
)
// devFlake.checks.${system} or {}
);
packages = forAllSystems (system:
{ # Here we put attributes that map 1:1 into packages.<system>, ie
# for which we don't apply the full build matrix such as cross or static.
inherit (nixpkgsFor.${system}.native)
changelog-d;
default = self.packages.${system}.nix;
nix-internal-api-docs = nixpkgsFor.${system}.native.nix-internal-api-docs;
nix-external-api-docs = nixpkgsFor.${system}.native.nix-external-api-docs;
}
# We need to flatten recursive attribute sets of derivations to pass `flake check`.
// flatMapAttrs
{ # Components we'll iterate over in the upcoming lambda
"nix" = { };
# Temporarily disabled because GitHub Actions OOM issues. Once
# the old build system is gone and we are back to one build
# system, we should reenable these.
#"nix-util" = { };
#"nix-store" = { };
#"nix-fetchers" = { };
}
(pkgName: {}: {
# These attributes go right into `packages.<system>`.
"${pkgName}" = nixpkgsFor.${system}.native.${pkgName};
"${pkgName}-static" = nixpkgsFor.${system}.static.${pkgName};
}
// flatMapAttrs (lib.genAttrs crossSystems (_: { })) (crossSystem: {}: {
# These attributes go right into `packages.<system>`.
"${pkgName}-${crossSystem}" = nixpkgsFor.${system}.cross.${crossSystem}.${pkgName};
})
// flatMapAttrs (lib.genAttrs stdenvs (_: { })) (stdenvName: {}: {
# These attributes go right into `packages.<system>`.
"${pkgName}-${stdenvName}" = nixpkgsFor.${system}.stdenvs."${stdenvName}Packages".${pkgName};
})
)
// lib.optionalAttrs (builtins.elem system linux64BitSystems) {
dockerImage =
let
pkgs = nixpkgsFor.${system}.native;
image = import ./docker.nix { inherit pkgs; tag = version; };
in
pkgs.runCommand
"docker-image-tarball-${version}"
{ meta.description = "Docker image with Nix for ${system}"; }
''
mkdir -p $out/nix-support
image=$out/image.tar.gz
ln -s ${image} $image
echo "file binary-dist $image" >> $out/nix-support/hydra-build-products
'';
});
devShells = let
makeShell = pkgs: stdenv: (pkgs.nix.override { inherit stdenv; forDevShell = true; }).overrideAttrs (attrs:
let
modular = devFlake.getSystem stdenv.buildPlatform.system;
transformFlag = prefix: flag:
assert builtins.isString flag;
let
rest = builtins.substring 2 (builtins.stringLength flag) flag;
in
"-D${prefix}:${rest}";
havePerl = stdenv.buildPlatform == stdenv.hostPlatform && stdenv.hostPlatform.isUnix;
in {
pname = "shell-for-" + attrs.pname;
# Remove the version suffix to avoid unnecessary attempts to substitute in nix develop
version = lib.fileContents ./.version;
name = attrs.pname;
installFlags = "sysconfdir=$(out)/etc";
shellHook = ''
PATH=$prefix/bin:$PATH
unset PYTHONPATH
export MANPATH=$out/share/man:$MANPATH
# Make bash completion work.
XDG_DATA_DIRS+=:$out/share
'';
# We use this shell with the local checkout, not unpackPhase.
src = null;
env = {
# Needed for Meson to find Boost.
# https://github.com/NixOS/nixpkgs/issues/86131.
BOOST_INCLUDEDIR = "${lib.getDev pkgs.boost}/include";
BOOST_LIBRARYDIR = "${lib.getLib pkgs.boost}/lib";
# For `make format`, to work without installing pre-commit
_NIX_PRE_COMMIT_HOOKS_CONFIG =
"${(pkgs.formats.yaml { }).generate "pre-commit-config.yaml" modular.pre-commit.settings.rawConfig}";
};
mesonFlags =
map (transformFlag "libutil") pkgs.nix-util.mesonFlags
++ map (transformFlag "libstore") pkgs.nix-store.mesonFlags
++ map (transformFlag "libfetchers") pkgs.nix-fetchers.mesonFlags
++ lib.optionals havePerl (map (transformFlag "perl") pkgs.nix-perl-bindings.mesonFlags)
;
nativeBuildInputs = attrs.nativeBuildInputs or []
++ pkgs.nix-util.nativeBuildInputs
++ pkgs.nix-store.nativeBuildInputs
++ pkgs.nix-fetchers.nativeBuildInputs
++ lib.optionals havePerl pkgs.nix-perl-bindings.nativeBuildInputs
++ pkgs.nix-internal-api-docs.nativeBuildInputs
++ pkgs.nix-external-api-docs.nativeBuildInputs
++ [
modular.pre-commit.settings.package
(pkgs.writeScriptBin "pre-commit-hooks-install"
modular.pre-commit.settings.installationScript)
]
# TODO: Remove the darwin check once
# https://github.com/NixOS/nixpkgs/pull/291814 is available
++ lib.optional (stdenv.cc.isClang && !stdenv.buildPlatform.isDarwin) pkgs.buildPackages.bear
++ lib.optional (stdenv.cc.isClang && stdenv.hostPlatform == stdenv.buildPlatform) pkgs.buildPackages.clang-tools;
buildInputs = attrs.buildInputs or []
++ lib.optional havePerl pkgs.perl
;
});
in
forAllSystems (system:
let
makeShells = prefix: pkgs:
lib.mapAttrs'
(k: v: lib.nameValuePair "${prefix}-${k}" v)
(forAllStdenvs (stdenvName: makeShell pkgs pkgs.${stdenvName}));
in
(makeShells "native" nixpkgsFor.${system}.native) //
(lib.optionalAttrs (!nixpkgsFor.${system}.native.stdenv.isDarwin)
(makeShells "static" nixpkgsFor.${system}.static) //
(forAllCrossSystems (crossSystem: let pkgs = nixpkgsFor.${system}.cross.${crossSystem}; in makeShell pkgs pkgs.stdenv))) //
{
default = self.devShells.${system}.native-stdenvPackages;
}
);
};
}