pkg.nix

{
  lib,
  buildGoModule,
  fetchFromGitHub,
  gnused,
  installShellFiles,
  nixosTests,
  caddy,
  testers,
  stdenv,
}: let
  attrsToModule = map (plugin: plugin.repo);
  attrsToVersionedModule = map ({
    repo,
    version,
    ...
  }:
    lib.escapeShellArg "${repo}@${version}");

  pname = "caddy";
  version = "2.8.4";

  dist = fetchFromGitHub {
    owner = "caddyserver";
    repo = "dist";
    rev = "v${version}";
    hash = "sha256-O4s7PhSUTXoNEIi+zYASx8AgClMC5rs7se863G6w+l0=";
  };

  src = fetchFromGitHub {
    owner = "caddyserver";
    repo = "caddy";
    rev = "v${version}";
    hash = "sha256-CBfyqtWp3gYsYwaIxbfXO3AYaBiM7LutLC7uZgYXfkQ=";
  };

  subPackages = ["cmd/caddy"];

  ldflags = [
    "-s"
    "-w"
    "-X github.com/caddyserver/caddy/v2.CustomVersion=${version}"
  ];

  # matches upstream since v2.8.0
  tags = ["nobadger"];

  nativeBuildInputs = [
    gnused
    installShellFiles
  ];

  postInstall =
    ''
      install -Dm644 ${dist}/init/caddy.service ${dist}/init/caddy-api.service -t $out/lib/systemd/system

      substituteInPlace $out/lib/systemd/system/caddy.service \
        --replace-fail "/usr/bin/caddy" "$out/bin/caddy"
      substituteInPlace $out/lib/systemd/system/caddy-api.service \
        --replace-fail "/usr/bin/caddy" "$out/bin/caddy"
    ''
    + lib.optionalString (stdenv.buildPlatform.canExecute stdenv.hostPlatform) ''
      # Generating man pages and completions fail on cross-compilation
      # https://github.com/NixOS/nixpkgs/issues/308283

      $out/bin/caddy manpage --directory manpages
      installManPage manpages/*

      installShellCompletion --cmd caddy \
        --bash <($out/bin/caddy completion bash) \
        --fish <($out/bin/caddy completion fish) \
        --zsh <($out/bin/caddy completion zsh)
    '';

  meta = with lib; {
    homepage = "https://caddyserver.com";
    description = "Fast and extensible multi-platform HTTP/1-2-3 web server with automatic HTTPS";
    license = licenses.asl20;
    mainProgram = "caddy";
    maintainers = with maintainers; [
      Br1ght0ne
      emilylange
      techknowlogick
    ];
  };
in
  buildGoModule {
    inherit
      pname
      version
      src
      subPackages
      ldflags
      tags
      nativeBuildInputs
      postInstall
      meta
      ;

    vendorHash = "sha256-1Api8bBZJ1/oYk4ZGIiwWCSraLzK9L+hsKXkFtk6iVM=";

    passthru = {
      withPlugins = {
        caddyModules,
        vendorHash ? lib.fakeHash,
      }:
        buildGoModule {
          pname = "${caddy.pname}-with-plugins";

          inherit
            version
            src
            subPackages
            ldflags
            tags
            nativeBuildInputs
            postInstall
            meta
            ;

          modBuildPhase = ''
            for module in ${toString (attrsToModule caddyModules)}; do
              sed -i "/standard/a _ \"$module\"" ./cmd/caddy/main.go
            done
            for plugin in ${toString (attrsToVersionedModule caddyModules)}; do
              go get $plugin
            done
            go mod vendor
          '';

          modInstallPhase = ''
            mv -t vendor go.mod go.sum
            cp -r vendor "$out"
          '';

          preBuild = ''
            chmod -R u+w vendor
            [ -f vendor/go.mod ] && mv -t . vendor/go.{mod,sum}
            for module in ${toString (attrsToModule caddyModules)}; do
              sed -i "/standard/a _ \"$module\"" ./cmd/caddy/main.go
            done
          '';

          inherit vendorHash;
        };
      tests = {
        inherit (nixosTests) caddy;
        version = testers.testVersion {
          command = "${caddy}/bin/caddy version";
          package = caddy;
        };
      };
    };
  }