dagger-0.12.5.nix

{ lib, stdenv, fetchurl, unzip }:

let
  # https://docs.dagger.io/install
  version = "0.12.5"; # Replace with the actual version you want to install
  system = stdenv.hostPlatform.system;
  
  # Map Nix system to Dagger's OS and architecture naming
systemMap = {
    "x86_64-linux"  = { os = "linux_amd64";  sha256 = ""; };
    "aarch64-linux" = { os = "linux_arm64";  sha256 = ""; };
    "x86_64-darwin" = { os = "darwin_amd64"; sha256 = ""; };
    "aarch64-darwin" = { os = "darwin_arm64"; sha256 = "sha256-kE/7BL/xxRKR+rKpyjZF7IIPuwUNjjhzqUwoY0GjrFw="; };
  };

  selectedSystem = systemMap.${system} or (throw "Unsupported system: ${system}");

  # Construct the filename based on version and system
  filename = "dagger_v${version}_${selectedSystem.os}.tar.gz";
in
stdenv.mkDerivation rec {
  pname = "dagger";
  inherit version;

  src = fetchurl {
    url = "https://dl.dagger.io/dagger/releases/${version}/${filename}";
    sha256 = selectedSystem.sha256;
  };

  nativeBuildInputs = [ unzip ];

  unpackPhase = ''
    if [[ "${filename}" == *.zip ]]; then
      unzip $src
    else
      tar xzf $src
    fi
  '';

  installPhase = ''
    install -D dagger $out/bin/dagger
  '';

  postInstall = ''
    # Generate shell completions
    mkdir -p $out/share/bash-completion/completions
    $out/bin/dagger completion bash > $out/share/bash-completion/completions/dagger

    mkdir -p $out/share/zsh/site-functions
    $out/bin/dagger completion zsh > $out/share/zsh/site-functions/_dagger

    mkdir -p $out/share/fish/vendor_completions.d
    $out/bin/dagger completion fish > $out/share/fish/vendor_completions.d/dagger.fish
  '';

  meta = with lib; {
    description = "A portable devkit for CI/CD pipelines";
    homepage = "https://dagger.io/";
    license = licenses.asl20;
    maintainers = with maintainers; [ /* Add maintainers here */ ];
    platforms = builtins.attrNames systemMap;
  };
}