oeiuwq.com
A flake checker (treefmt & nix-unit) for testing other flakes with zero dependencies.
check
+1
.github/workflows/test.yml
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.github/workflows/test.yml
···
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- uses: actions/checkout@v4
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- uses: cachix/install-nix-action@v30
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- run: nix run -L .#checkmate-treefmt -- --ci $PWD
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- run: nix flake check -L
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- run: nix flake check -L --override-input target path:$PWD/example
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- run: |
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nix flake check -L --override-input target path:$PWD/failing-example || touch did-failed
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README.md
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README.md
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default.nix
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default.nix
···
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{ inputs, ... }:
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let
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flakeModule = {
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systems = import inputs.systems;
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imports = [
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inputs.flake-parts.flakeModules.flakeModules
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./perSystem-lib.nix
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./tests.nix
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./treefmt.nix
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];
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};
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in
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{
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imports = [
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inputs.flake-parts.flakeModules.flakeModules
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./perSystem-lib.nix
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./tests.nix
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./treefmt.nix
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];
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-
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systems = import inputs.systems;
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flake.flakeModules.default = ./default.nix;
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imports = [ flakeModule ];
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flake.flakeModules.default = flakeModule;
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}
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example/flake.nix
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example/flake.nix
···
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{
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inputs.empty.url = "github:vic/empty-flake"; # example dependency
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inputs.dep.url = "github:nix-systems/x86_64-linux"; # example dependency
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outputs = _inputs: {
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# Example
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flakeModules.nix-unit =
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{ ... }: # you can access inputs.target.inputs.empty from here
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{ inputs, ... }:
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{
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perSystem = (
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{ lib, ... }:
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{
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nix-unit.tests = {
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checkmate."test lib works" = {
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expr = lib.removeSuffix ".nix" "hello.nix";
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expected = "hello";
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checkmate."test access inputs via target" = {
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expr = lib.removePrefix "x86_64-" (lib.elemAt (import inputs.target.inputs.dep) 0);
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expected = "linux";
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};
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};
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}
+23
-5
flake.lock
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flake.lock
···
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{
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"nodes": {
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"empty": {
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"locked": {
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"lastModified": 1741993073,
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"narHash": "sha256-hTJPMh9Bwky2TlaWmLrkBHdUBmpxSCPRK+bmnFNpNQE=",
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"owner": "vic",
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"repo": "empty-flake",
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"rev": "a402c2c33ff3f5010eb0357d8228f27fb7083cbd",
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"type": "github"
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},
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"original": {
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"owner": "vic",
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"repo": "empty-flake",
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"type": "github"
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}
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},
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"flake-parts": {
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"inputs": {
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"nixpkgs-lib": [
···
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}
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},
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"target": {
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"inputs": {
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"empty": "empty"
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},
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"locked": {
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"dir": "failing-example",
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"lastModified": 1742084732,
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"narHash": "sha256-yoe7izv/Cl/qkCyn3HzsPAwlWNlTTeI6waBiIJEoMaY=",
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"dir": "example",
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"lastModified": 1742085978,
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"narHash": "sha256-G4yl2Kdrx2vI0qJ7EUgFd6eaadcngjg37XDzDBbpSWg=",
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"owner": "vic",
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"repo": "checkmate",
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"rev": "9132a1ffd6cca2527aae6e669976940ae6e6f030",
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"rev": "af3b609faa00ef97b2fc2ca81f400249f80169af",
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"type": "github"
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},
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"original": {
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"dir": "failing-example",
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"dir": "example",
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"owner": "vic",
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"repo": "checkmate",
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"type": "github"
+1
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flake.nix
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flake.nix
···
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inputs = {
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# example target flake to be tested
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# override with something else.
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target.url = "github:vic/checkmate?dir=failing-example";
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target.url = "github:vic/checkmate?dir=example";
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nixpkgs.url = "github:nixos/nixpkgs/24.11";
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systems.url = "github:nix-systems/default";
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tests.nix
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tests.nix
···
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imports = [
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# Tests are defined by target, and imported bellow by `inputs.target.flakeModules.nix-unit`.
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# See example/flake.nix or https://github.com/vic/import-tree/tree/main/checks/default.nix
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inputs.target.flakeModules.nix-unit
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(inputs.target or inputs.self).flakeModules.nix-unit
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inputs.nix-unit.modules.flake.default
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];
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perSystem = (
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{ ... }:
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let
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fixedInputs = inputs // inputs.target.inputs;
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in
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{
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nix-unit.allowNetwork = true;
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nix-unit.inputs = fixedInputs;
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nix-unit.inputs = inputs;
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}
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);
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}
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treefmt.nix
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treefmt.nix
···
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programs.yamlfmt.enable = true;
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};
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treefmt-wrapper = treefmt.config.build.wrapper;
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treefmt-check = treefmt.config.build.check inputs.target;
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treefmt-check = treefmt.config.build.check (inputs.target or inputs.self);
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in
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{
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packages.checkmate-treefmt = treefmt-wrapper;