Resolve @samihiltunen feedback: Export Gitaly test server code

To support running a Gitaly server for testing purposes, some test code
from Praefect will be exported and moved to a dedicated package. Ideally
this code should live in the `internal/testhelper` package, but that
would create a cyclical dependency due to many service unit tests already
importing that package. This test code instantiates those same services
under test, thus causing the cyclical dependency.

1 files changed, 89 insertions, 0 deletions

diff --git a/internal/testhelper/testserver/gitaly.go b/internal/testhelper/testserver/gitaly.go
new file mode 100644
index 000000000..be38eba67
--- /dev/null
+++ b/internal/testhelper/testserver/gitaly.go
@@ -0,0 +1,89 @@
+package testserver
+
+import (
+	"net"
+	"testing"
+
+	"github.com/stretchr/testify/require"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/config"
+	internalauth "gitlab.com/gitlab-org/gitaly/internal/gitaly/config/auth"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/rubyserver"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/server/auth"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/service/commit"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/service/internalgitaly"
+	"gitlab.com/gitlab-org/gitaly/internal/gitaly/service/repository"
+	gitalyserver "gitlab.com/gitlab-org/gitaly/internal/gitaly/service/server"
+	"gitlab.com/gitlab-org/gitaly/internal/testhelper"
+	"gitlab.com/gitlab-org/gitaly/proto/go/gitalypb"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/health"
+	healthpb "google.golang.org/grpc/health/grpc_health_v1"
+)
+
+var RubyServer = &rubyserver.Server{}
+
+// PartialGitaly is a subset of Gitaly's behavior
+type PartialGitaly interface {
+	gitalypb.ServerServiceServer
+	gitalypb.RepositoryServiceServer
+	gitalypb.InternalGitalyServer
+	gitalypb.CommitServiceServer
+	healthpb.HealthServer
+}
+
+func registerGitalyServices(server *grpc.Server, pg PartialGitaly) {
+	gitalypb.RegisterServerServiceServer(server, pg)
+	gitalypb.RegisterRepositoryServiceServer(server, pg)
+	gitalypb.RegisterInternalGitalyServer(server, pg)
+	gitalypb.RegisterCommitServiceServer(server, pg)
+	healthpb.RegisterHealthServer(server, pg)
+}
+
+// RealGitaly instantiates an instance of PartialGitaly that uses the real world
+// services. This is intended to be used in integration tests to validate
+// Gitaly services.
+func RealGitaly(storages []config.Storage, authToken, internalSocketPath string) PartialGitaly {
+	return struct {
+		gitalypb.ServerServiceServer
+		gitalypb.RepositoryServiceServer
+		gitalypb.InternalGitalyServer
+		gitalypb.CommitServiceServer
+		healthpb.HealthServer
+	}{
+		gitalyserver.NewServer(storages),
+		repository.NewServer(RubyServer, config.NewLocator(config.Config), internalSocketPath),
+		internalgitaly.NewServer(config.Config.Storages),
+		commit.NewServer(config.NewLocator(config.Config)),
+		health.NewServer(),
+	}
+}
+
+func RunInternalGitalyServer(t testing.TB, storages []config.Storage, token string) (*grpc.Server, string, func()) {
+	streamInt := []grpc.StreamServerInterceptor{auth.StreamServerInterceptor(internalauth.Config{Token: token})}
+	unaryInt := []grpc.UnaryServerInterceptor{auth.UnaryServerInterceptor(internalauth.Config{Token: token})}
+
+	server := testhelper.NewTestGrpcServer(t, streamInt, unaryInt)
+	serverSocketPath := testhelper.GetTemporaryGitalySocketFileName()
+
+	listener, err := net.Listen("unix", serverSocketPath)
+	require.NoError(t, err)
+
+	internalSocketPath := config.GitalyInternalSocketPath()
+	internalListener, err := net.Listen("unix", internalSocketPath)
+	require.NoError(t, err)
+
+	registerGitalyServices(server, RealGitaly(storages, token, internalSocketPath))
+
+	errQ := make(chan error)
+
+	go func() { errQ <- server.Serve(listener) }()
+	go func() { errQ <- server.Serve(internalListener) }()
+
+	cleanup := func() {
+		server.Stop()
+		require.NoError(t, <-errQ)
+		require.NoError(t, <-errQ)
+	}
+
+	return server, "unix://" + serverSocketPath, cleanup
+}