nixos/tests/gitea-hide-actions.nix

{
  config,
  lib,
  pkgs,
  ...
}:
let
  baseSiteConfig = import ../site-config.nix;
  baseServiceConfigs = import ../hosts/muffin/service-configs.nix {
    site_config = baseSiteConfig;
  };
  testServiceConfigs = lib.recursiveUpdate baseServiceConfigs {
    zpool_ssds = "";
    gitea = {
      dir = "/var/lib/gitea";
      # `:80` makes Caddy bind all hosts on HTTP port 80 with no Host-header
      # matching — simplest path to a reachable vhost inside the test VM
      # where there is no ACME / DNS and no TLS terminator.
      domain = ":80";
    };
    ports.private.gitea = {
      port = 3000;
      proto = "tcp";
    };
  };

  testLib = lib.extend (
    final: prev: {
      serviceMountWithZpool =
        serviceName: zpool: dirs:
        { ... }:
        { };
      serviceFilePerms = serviceName: tmpfilesRules: { ... }: { };
    }
  );

  giteaModule =
    { config, pkgs, ... }:
    {
      imports = [
        (import ../services/gitea/gitea.nix {
          inherit config pkgs;
          lib = testLib;
          service_configs = testServiceConfigs;
        })
      ];
    };
in
pkgs.testers.runNixOSTest {
  name = "gitea-hide-actions";

  nodes = {
    server =
      {
        config,
        lib,
        pkgs,
        ...
      }:
      {
        imports = [
          ../modules/server-security.nix
          giteaModule
        ];

        # The shared gitea.nix module derives DOMAIN/ROOT_URL from the
        # `service_configs.gitea.domain` string, which here is the full URL
        # `http://server`. Override to valid bare values so Gitea doesn't
        # get a malformed ROOT_URL like `https://http://server`.
        services.gitea.settings = {
          server = {
            DOMAIN = lib.mkForce "server";
            ROOT_URL = lib.mkForce "http://server/";
          };
          # Tests talk HTTP, so drop the Secure flag — otherwise curl's cookie
          # jar holds the session cookie but never sends it back.
          session.COOKIE_SECURE = lib.mkForce false;
        };
        services.caddy = {
          enable = true;
          # No DNS / ACME in the VM test network — serve plain HTTP.
          globalConfig = ''
            auto_https off
          '';
        };

        services.postgresql.enable = true;

        # Stub out zfs/mount ordering added by the real serviceMountWithZpool.
        systemd.services."gitea-mounts".enable = lib.mkForce false;
        systemd.services.gitea = {
          wants = lib.mkForce [ ];
          after = lib.mkForce [ "postgresql.service" ];
          requires = lib.mkForce [ ];
        };

        networking.firewall.allowedTCPPorts = [
          80
          3000
        ];
      };

    client =
      { pkgs, ... }:
      {
        environment.systemPackages = [ pkgs.curl ];
      };
  };

  testScript = ''
    import re

    start_all()
    server.wait_for_unit("postgresql.service")
    server.wait_for_unit("gitea.service")
    server.wait_for_unit("caddy.service")
    server.wait_for_open_port(3000)
    server.wait_for_open_port(80)

    server.succeed(
        "su -l gitea -s /bin/sh -c '${pkgs.gitea}/bin/gitea admin user create "
        "--username testuser --password testpassword "
        "--email test@test.local --must-change-password=false "
        "--work-path /var/lib/gitea'"
    )

    def curl(args, cookies=None):
        cookie_args = f"-b {cookies} " if cookies else ""
        cmd = (
            "curl -4 -s -o /dev/null "
            f"-w '%{{http_code}}|%{{redirect_url}}' {cookie_args}{args}"
        )
        return client.succeed(cmd).strip()

    def login():
        # Gitea's POST /user/login requires a _csrf token and expects the
        # matching session cookie already set. Fetch the login form first
        # to harvest both, then submit credentials with the same cookie jar.
        client.succeed("rm -f /tmp/cookies.txt")
        html = client.succeed(
            "curl -4 -s -c /tmp/cookies.txt http://server/user/login"
        )
        match = re.search(r'name="_csrf"\s+value="([^"]+)"', html)
        assert match, f"CSRF token not found in login form: {html[:500]!r}"
        csrf = match.group(1)
        # -L so we follow the post-login redirect; the session cookie is
        # rewritten by Gitea on successful login to carry uid.
        client.succeed(
            "curl -4 -s -L -o /dev/null "
            "-b /tmp/cookies.txt -c /tmp/cookies.txt "
            f"--data-urlencode '_csrf={csrf}' "
            "--data-urlencode 'user_name=testuser' "
            "--data-urlencode 'password=testpassword' "
            "http://server/user/login"
        )
        # Sanity-check the session by hitting the gated probe directly —
        # the post-login cookie jar MUST drive /user/stopwatches to 200.
        probe = client.succeed(
            "curl -4 -s -o /dev/null -w '%{http_code}' "
            "-b /tmp/cookies.txt http://server/user/stopwatches"
        ).strip()
        assert probe == "200", f"session auth probe expected 200, got {probe!r}"
        return "/tmp/cookies.txt"

    with subtest("Anonymous /{user}/{repo}/actions redirects to login"):
        result = curl("http://server/foo/bar/actions")
        code, _, redir = result.partition("|")
        print(f"anon /foo/bar/actions -> {result!r}")
        assert code == "302", f"expected 302, got {code!r} (full: {result!r})"
        assert "/user/login" in redir, f"expected login redirect, got {redir!r}"
        assert "redirect_to=" in redir, f"expected redirect_to param, got {redir!r}"
        assert "/foo/bar/actions" in redir, (
            f"expected original URL preserved in redirect_to, got {redir!r}"
        )

    with subtest("Anonymous deep /actions paths also redirect"):
        for path in ["/foo/bar/actions/", "/foo/bar/actions/runs/1", "/foo/bar/actions/workflows/build.yaml"]:
            result = curl(f"http://server{path}")
            code, _, redir = result.partition("|")
            print(f"anon {path} -> {result!r}")
            assert code == "302", f"{path}: expected 302, got {code!r}"
            assert "/user/login" in redir, f"{path}: expected login redirect, got {redir!r}"

    with subtest("Anonymous workflow badge stays public"):
        result = curl("http://server/foo/bar/actions/workflows/ci.yaml/badge.svg")
        code, _, redir = result.partition("|")
        print(f"anon badge -> {result!r}")
        assert code != "302" or "/user/login" not in redir, (
            f"badge path should not redirect to login, got {result!r}"
        )

    cookies = login()

    with subtest("Session-authenticated /{user}/{repo}/actions reaches Gitea"):
        result = curl(
            "http://server/testuser/nonexistent/actions", cookies=cookies
        )
        code, _, redir = result.partition("|")
        print(f"auth /testuser/nonexistent/actions -> {result!r}")
        # Gitea returns 404 for the missing repo — the key assertion is that
        # Caddy's gate forwarded the request instead of redirecting to login.
        assert not (code == "302" and "/user/login" in redir), (
            f"session-authed actions request was intercepted by login gate: {result!r}"
        )

    with subtest("Anonymous /explore/repos is served without gating"):
        result = curl("http://server/explore/repos")
        code, _, _ = result.partition("|")
        print(f"anon /explore/repos -> {result!r}")
        assert code == "200", f"expected 200 for public explore page, got {result!r}"

    with subtest("Anonymous /{user}/{repo} (non-actions) is not login-gated"):
        result = curl("http://server/foo/bar")
        code, _, redir = result.partition("|")
        print(f"anon /foo/bar -> {result!r}")
        assert not (code == "302" and "/user/login" in redir), (
            f"non-actions repo path should not redirect to login: {result!r}"
        )
  '';
}