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| { | ||
| description = "An over-engineered Hello World in bash"; | ||
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| # Nixpkgs / NixOS version to use. | ||
| inputs.nixpkgs.url = "nixpkgs/nixos-21.05"; | ||
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| outputs = { self, nixpkgs }: | ||
| let | ||
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| # to work with older version of flakes | ||
| lastModifiedDate = self.lastModifiedDate or self.lastModified or "19700101"; | ||
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| # Generate a user-friendly version number. | ||
| version = builtins.substring 0 8 lastModifiedDate; | ||
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| # System types to support. | ||
| supportedSystems = [ "x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin" ]; | ||
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| # Helper function to generate an attrset '{ x86_64-linux = f "x86_64-linux"; ... }'. | ||
| forAllSystems = nixpkgs.lib.genAttrs supportedSystems; | ||
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| # Nixpkgs instantiated for supported system types. | ||
| nixpkgsFor = forAllSystems (system: import nixpkgs { inherit system; overlays = [ self.overlay ]; }); | ||
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| in | ||
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| { | ||
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| # A Nixpkgs overlay. | ||
| overlay = final: prev: { | ||
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| hello = with final; stdenv.mkDerivation rec { | ||
| name = "hello-${version}"; | ||
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| unpackPhase = ":"; | ||
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| buildPhase = | ||
| '' | ||
| cat > hello <<EOF | ||
| #! $SHELL | ||
| echo "Hello Nixers!" | ||
| EOF | ||
| chmod +x hello | ||
| ''; | ||
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| installPhase = | ||
| '' | ||
| mkdir -p $out/bin | ||
| cp hello $out/bin/ | ||
| ''; | ||
| }; | ||
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| }; | ||
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| # Provide some binary packages for selected system types. | ||
| packages = forAllSystems (system: | ||
| { | ||
| inherit (nixpkgsFor.${system}) hello; | ||
| }); | ||
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| # The default package for 'nix build'. This makes sense if the | ||
| # flake provides only one package or there is a clear "main" | ||
| # package. | ||
| defaultPackage = forAllSystems (system: self.packages.${system}.hello); | ||
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| # A NixOS module, if applicable (e.g. if the package provides a system service). | ||
| nixosModules.hello = | ||
| { pkgs, ... }: | ||
| { | ||
| nixpkgs.overlays = [ self.overlay ]; | ||
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| environment.systemPackages = [ pkgs.hello ]; | ||
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| #systemd.services = { ... }; | ||
| }; | ||
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| # Tests run by 'nix flake check' and by Hydra. | ||
| checks = forAllSystems | ||
| (system: | ||
| with nixpkgsFor.${system}; | ||
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| { | ||
| inherit (self.packages.${system}) hello; | ||
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| # Additional tests, if applicable. | ||
| test = stdenv.mkDerivation { | ||
| name = "hello-test-${version}"; | ||
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| buildInputs = [ hello ]; | ||
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| unpackPhase = "true"; | ||
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| buildPhase = '' | ||
| echo 'running some integration tests' | ||
| [[ $(hello) = 'Hello Nixers!' ]] | ||
| ''; | ||
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| installPhase = "mkdir -p $out"; | ||
| }; | ||
| } | ||
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| // lib.optionalAttrs stdenv.isLinux { | ||
| # A VM test of the NixOS module. | ||
| vmTest = | ||
| with import (nixpkgs + "/nixos/lib/testing-python.nix") { | ||
| inherit system; | ||
| }; | ||
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| makeTest { | ||
| nodes = { | ||
| client = { ... }: { | ||
| imports = [ self.nixosModules.hello ]; | ||
| }; | ||
| }; | ||
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| testScript = | ||
| '' | ||
| start_all() | ||
| client.wait_for_unit("multi-user.target") | ||
| client.succeed("hello") | ||
| ''; | ||
| }; | ||
| } | ||
| ); | ||
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| }; | ||
| } |
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| Original file line number | Diff line number | Diff line change |
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| @@ -0,0 +1,7 @@ | ||
| (import ( | ||
| fetchTarball { | ||
| url = "https://github.com/edolstra/flake-compat/archive/99f1c2157fba4bfe6211a321fd0ee43199025dbf.tar.gz"; | ||
| sha256 = "0x2jn3vrawwv9xp15674wjz9pixwjyj3j771izayl962zziivbx2"; } | ||
| ) { | ||
| src = ./.; | ||
| }).defaultNix |
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