{ lib
, buildGoModule
, fetchFromGitHub
, gnused
, nixosTests
, caddy
, testers
, installShellFiles
, externalPlugins ? []
, vendorHash ? "sha256-YNcQtjPGQ0XMSog+sWlH4lG/QdbdI0Lyh/fUGqQUFaY="
}:

let
  attrsToModules = attrs:
    builtins.map ({name, repo, version}: "${repo}") attrs;
  attrsToSources = attrs:
    builtins.map ({name, repo, version}: "${repo}@${version}") attrs;
in buildGoModule rec {
  pname = "caddy";
  version = "2.7.5";

  dist = fetchFromGitHub {
    owner = "caddyserver";
    repo = "dist";
    rev = "v${version}";
    hash = "sha256-aZ7hdAZJH1PvrX9GQLzLquzzZG3LZSKOvt7sWQhTiR8=";
  };

  src = fetchFromGitHub {
    owner = "caddyserver";
    repo = "caddy";
    rev = "v${version}";
    hash = "sha256-0IZZ7mkEzZI2Y8ed//m0tbBQZ0YcCXA0/b10ntNIXUk=";
  };

  inherit vendorHash;

  subPackages = [ "cmd/caddy" ];

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

  nativeBuildInputs = [ gnused installShellFiles ];

  modBuildPhase = ''
    for module in ${builtins.toString (attrsToModules externalPlugins)}; do
      sed -i "/standard/a _ \"$module\"" ./cmd/caddy/main.go
    done
    for plugin in ${builtins.toString (attrsToSources externalPlugins)}; do
      go get $plugin
    done

    go generate
    go mod vendor
  '';

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

  preBuild = ''
    chmod -R u+w vendor
    [ -f vendor/go.mod ] && mv -t . vendor/go.{mod,sum}
    go generate

    for module in ${builtins.toString (attrsToModules externalPlugins)}; do
      sed -i "/standard/a _ \"$module\"" ./cmd/caddy/main.go
    done
  '';

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

    substituteInPlace $out/lib/systemd/system/caddy.service --replace "/usr/bin/caddy" "$out/bin/caddy"
    substituteInPlace $out/lib/systemd/system/caddy-api.service --replace "/usr/bin/caddy" "$out/bin/caddy"

    $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)
  '';

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

  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 ];
  };
}