51 lines
1.5 KiB
Nix
51 lines
1.5 KiB
Nix
{
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# Packages a shell script as a Nix derivation.
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# Try: `nix build`, then `./result/bin/greet`
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# Or: `nix run`
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description = "Package a script with stdenv.mkDerivation";
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inputs = {
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nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
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};
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outputs =
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{ self, nixpkgs, ... }:
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let
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system = "x86_64-linux";
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pkgs = import nixpkgs { inherit system; };
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in
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{
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packages.${system}.default = pkgs.stdenv.mkDerivation {
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pname = "greet";
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version = "0.1.0";
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# `src = ./.` copies the flake directory into the store.
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# The build then runs inside that copy.
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src = ./.;
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# Skip the default unpack/build phases; this example has no C code.
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dontUnpack = true;
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dontBuild = true;
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# installPhase is a shell snippet. `$out` is the output store path.
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installPhase = ''
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mkdir -p $out/bin
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cp ${./greet.sh} $out/bin/greet
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chmod +x $out/bin/greet
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# Patch the shebang so the script uses a store-path bash,
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# not /bin/sh (which may not exist on a pure NixOS system).
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substituteInPlace $out/bin/greet \
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--replace-fail "#!/usr/bin/env bash" "#!${pkgs.bash}/bin/bash"
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'';
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};
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# `nix run` looks here. `program` must be a store path to an executable.
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apps.${system}.default = {
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type = "app";
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program = "${self.packages.${system}.default}/bin/greet";
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meta.description = "Run the packaged greet script.";
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};
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};
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}
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