hello/flake.nix

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{
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description = "A Nix Flake example for ANSI C using GNU Autoconf";
nixConfig = {
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bash-prompt = "\\[\\e[34;1m\\]hello.nix ~ \\[\\e[0m\\]";
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};
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inputs = {
nixpkgs.url = "github:nixos/nixpkgs";
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zicross.url = "github:flyx/Zicross";
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pre-commit-hooks.url = "github:cachix/pre-commit-hooks.nix";
nix-github-actions.url = "github:nix-community/nix-github-actions";
nix-github-actions.inputs.nixpkgs.follows = "nixpkgs";
alejandra.url = "github:kamadorueda/alejandra/3.0.0";
alejandra.inputs.nixpkgs.follows = "nixpkgs";
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};
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outputs = {
self,
nixpkgs,
flake-utils,
pre-commit-hooks,
nix-github-actions,
alejandra,
zicross,
}: let
inherit (nixpkgs) lib;
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"}";
supportedSystems = ["x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"];
# ??? [ "i386-linux" "x86_64-linux" "armv6l-linux" "armv7l-linux" "aarch64-linux" "powerpc64le-linux" "riscv64-linux" "x86_64-darwin" "aarch64-darwin" "x86_64-windows" "x86_64-windows" ];
# Generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'.
forAllSystems = nixpkgs.lib.genAttrs supportedSystems;
# Nixpkgs instantiated for supported system types.
nixpkgsFor = forAllSystems (system:
import nixpkgs {
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inherit system;
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overlays =
[
zicross.overlays.zig
zicross.overlays.debian
zicross.overlays.windows
]
++ self.additional_overlays;
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});
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in {
additional_overlays = [
(final: prev: {
hello = with final;
(
if lib.strings.hasSuffix "windows" system
then zigStdenv
else stdenv
)
.mkDerivation rec {
inherit version system;
pname = "hello";
src = self;
configureFlags = [
"--host ${system}"
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];
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nativeBuildInputs = [autoreconfHook];
meta = {
maintainers = ["Greg Burd <greg@burd.me>"];
downloadPage = "https://github.com/gburd/hello/releases";
changelog = "https://raw.githubusercontent.com/gburd/hello/main/ChangeLog";
platforms = supportedSystems;
homepage = "https://github.com/gburd/hello";
license = "https://github.com/gburd/hello/LICENSE";
mainProgram = "hello";
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};
};
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})
];
packages = forAllSystems (system: let
pkgs = nixpkgsFor.${system};
in rec {
inherit (pkgs) hello;
default = hello;
lxc = pkgs.callPackage ./nix/lxc.nix {package = default;};
x86_64-windows = pkgs.callPackage ./nix/pkg-win64zip.nix {package = default;};
#x86_64-wix = pkgs.callPackage ./nix/pkg-win64-wix.nix { package = default; };
});
checks = forAllSystems (system: {
pre-commit-check = pre-commit-hooks.lib.${system}.run {
src = ./.;
hooks = {
alejandra.enable = true;
};
};
});
devShells.default = forAllSystems (system: import ./shell.nix {pkgs = nixpkgsFor.${system};});
# This changes things in "packages" below of the form: "packages.x86_64-linux" into
# "githubActions.targets.x86_64-linux.hello" so that the GHA matrix can iterate over them.
githubActions = nix-github-actions.lib.mkGithubMatrix {
checks = nixpkgs.lib.getAttrs ["x86_64-linux" "x86_64-darwin"] self.packages;
};
formatter = forAllSystems (system: nixpkgsFor.${system}.alejandra);
};
}