Replace the Auth and Auth::TLS singletons

Use a builder pattern for creation and validation, in a manner that
allows also other authentication methods to be added in the future
besides the current TLS/SSL.

The main Auth instances are built early and then passed by not_null
const pointers, to avoid passing temporaries, replacing the previous
Auth::TLS instances passed by simple nullable const pointers. Where
needed, these passed Auth instances are also stored, by const ref.

Tests also build Auth instances as needed, either with the default
'no certification' or from the test environment arguments.

1 files changed, 9 insertions, 12 deletions

diff --git a/test/buildtool/execution_api/bazel/bazel_network.test.cpp b/test/buildtool/execution_api/bazel/bazel_network.test.cpp
index 75821454..54d99305 100644
--- a/test/buildtool/execution_api/bazel/bazel_network.test.cpp
+++ b/test/buildtool/execution_api/bazel/bazel_network.test.cpp
@@ -26,18 +26,17 @@
 #include "src/buildtool/execution_api/remote/bazel/bazel_network.hpp"
 #include "src/buildtool/execution_api/remote/config.hpp"
 #include "src/buildtool/file_system/object_type.hpp"
+#include "test/utils/remote_execution/test_auth_config.hpp"
 
 constexpr std::size_t kLargeSize = GRPC_DEFAULT_MAX_RECV_MESSAGE_LENGTH + 1;
 
 TEST_CASE("Bazel network: write/read blobs", "[execution_api]") {
     auto const& info = RemoteExecutionConfig::RemoteAddress();
     std::string instance_name{"remote-execution"};
-    std::optional<Auth::TLS> auth = {};
-    if (Auth::Instance().GetAuthMethod() == AuthMethod::kTLS) {
-        auth = Auth::TLS::Instance();
-    }
-    auto network = BazelNetwork{
-        instance_name, info->host, info->port, auth ? &*auth : nullptr, {}};
+    auto auth_config = TestAuthConfig::ReadAuthConfigFromEnvironment();
+    REQUIRE(auth_config);
+    auto network =
+        BazelNetwork{instance_name, info->host, info->port, &*auth_config, {}};
 
     std::string content_foo("foo");
     std::string content_bar("bar");
@@ -82,12 +81,10 @@ TEST_CASE("Bazel network: read blobs with unknown size", "[execution_api]") {
 
     auto const& info = RemoteExecutionConfig::RemoteAddress();
     std::string instance_name{"remote-execution"};
-    std::optional<Auth::TLS> auth = {};
-    if (Auth::Instance().GetAuthMethod() == AuthMethod::kTLS) {
-        auth = Auth::TLS::Instance();
-    }
-    auto network = BazelNetwork{
-        instance_name, info->host, info->port, auth ? &*auth : nullptr, {}};
+    auto auth_config = TestAuthConfig::ReadAuthConfigFromEnvironment();
+    REQUIRE(auth_config);
+    auto network =
+        BazelNetwork{instance_name, info->host, info->port, &*auth_config, {}};
 
     std::string content_foo("foo");
     std::string content_bar(kLargeSize, 'x');  // single larger blob