feat(tvix/store/protos): add Export r/6772

Export will traverse a given PathInfo structure, and write the contents
in NAR format to the passed Writer.
It uses directoryLookupFn and blobLookupFn to resolve references.

This is being moved over from nar-bridge. We need to keep the code there
around until we can bump go.mod to storev1 with this merged, but the
tests can already be moved entirely.

Change-Id: Ie0de3077b09344cafa00ff1e2ddb8b52e9e631bc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/9602
Tested-by: BuildkiteCI
Reviewed-by: Brian McGee <brian@bmcgee.ie>
Autosubmit: flokli <flokli@flokli.de>

1 files changed, 0 insertions, 51 deletions

diff --git a/tvix/nar-bridge/pkg/exporter/pick_next_node_test.go b/tvix/nar-bridge/pkg/exporter/pick_next_node_test.go
deleted file mode 100644
index c80261ae6b6a..000000000000
--- a/tvix/nar-bridge/pkg/exporter/pick_next_node_test.go
+++ /dev/null
@@ -1,51 +0,0 @@
-package exporter
-
-import (
-	"testing"
-
-	castorev1pb "code.tvl.fyi/tvix/castore/protos"
-	"github.com/google/go-cmp/cmp"
-	"github.com/stretchr/testify/require"
-	"google.golang.org/protobuf/testing/protocmp"
-)
-
-func requireProtoEq(t *testing.T, expected interface{}, actual interface{}) {
-	if diff := cmp.Diff(expected, actual, protocmp.Transform()); diff != "" {
-		t.Errorf("unexpected difference:\n%v", diff)
-	}
-}
-
-func TestPopNextNode(t *testing.T) {
-	t.Run("empty directory", func(t *testing.T) {
-		d := &castorev1pb.Directory{
-			Directories: []*castorev1pb.DirectoryNode{},
-			Files:       []*castorev1pb.FileNode{},
-			Symlinks:    []*castorev1pb.SymlinkNode{},
-		}
-
-		n := drainNextNode(d)
-		require.Equal(t, nil, n)
-	})
-	t.Run("only directories", func(t *testing.T) {
-		ds := &castorev1pb.Directory{
-			Directories: []*castorev1pb.DirectoryNode{{
-				Name:   []byte("a"),
-				Digest: []byte{},
-				Size:   0,
-			}, {
-				Name:   []byte("b"),
-				Digest: []byte{},
-				Size:   0,
-			}},
-			Files:    []*castorev1pb.FileNode{},
-			Symlinks: []*castorev1pb.SymlinkNode{},
-		}
-
-		n := drainNextNode(ds)
-		requireProtoEq(t, &castorev1pb.DirectoryNode{
-			Name:   []byte("a"),
-			Digest: []byte{},
-			Size:   0,
-		}, n)
-	})
-}