From c3fb6d22187fc759563b265cfab65a48a6e4fa08 Mon Sep 17 00:00:00 2001 From: Florian Klink Date: Sat, 19 Nov 2022 23:21:13 +0000 Subject: feat(tvix/store/protos): implement Size() and Digest() for Directory This adds Size() and Digest() functions for the golang version. Change-Id: If71445a9bb26100bb4076ac4f5c96945b33919f9 Reviewed-on: https://cl.tvl.fyi/c/depot/+/7325 Tested-by: BuildkiteCI Reviewed-by: tazjin --- tvix/store/protos/castore.go | 39 +++++++++++++++ tvix/store/protos/castore_test.go | 100 ++++++++++++++++++++++++++++++++++++++ tvix/store/protos/go.mod | 16 ++++++ tvix/store/protos/go.sum | 96 ++++++++++++++++++++++++++++++++++++ 4 files changed, 251 insertions(+) create mode 100644 tvix/store/protos/castore.go create mode 100644 tvix/store/protos/castore_test.go create mode 100644 tvix/store/protos/go.sum diff --git a/tvix/store/protos/castore.go b/tvix/store/protos/castore.go new file mode 100644 index 000000000000..38419b40da99 --- /dev/null +++ b/tvix/store/protos/castore.go @@ -0,0 +1,39 @@ +package storev1 + +import ( + "fmt" + + "google.golang.org/protobuf/proto" + "lukechampine.com/blake3" +) + +// The size of a directory is calculated by summing up the numbers of +// `directories`, `files` and `symlinks`, and for each directory, its size +// field. +func (d *Directory) Size() uint32 { + var size uint32 + size = uint32(len(d.Files) + len(d.Symlinks)) + for _, d := range d.Directories { + size += 1 + d.Size + } + return size +} + +func (d *Directory) Digest() ([]byte, error) { + b, err := proto.MarshalOptions{ + Deterministic: true, + }.Marshal(d) + + if err != nil { + return nil, fmt.Errorf("error while marshalling directory: %w", err) + } + + h := blake3.New(32, nil) + + _, err = h.Write(b) + if err != nil { + return nil, fmt.Errorf("error writing to hasher: %w", err) + } + + return h.Sum(nil), nil +} diff --git a/tvix/store/protos/castore_test.go b/tvix/store/protos/castore_test.go new file mode 100644 index 000000000000..cac73f29c7f0 --- /dev/null +++ b/tvix/store/protos/castore_test.go @@ -0,0 +1,100 @@ +package storev1_test + +import ( + "testing" + + storev1pb "code.tvl.fyi/tvix/store/protos" + "github.com/stretchr/testify/assert" +) + +var ( + dummyDigest = []byte{ + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, + } +) + +func TestDirectorySize(t *testing.T) { + t.Run("empty", func(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{}, + Files: []*storev1pb.FileNode{}, + Symlinks: []*storev1pb.SymlinkNode{}, + } + + assert.Equal(t, uint32(0), d.Size()) + }) + + t.Run("containing single empty directory", func(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{{ + Name: "foo", + Digest: dummyDigest, + Size: 0, + }}, + Files: []*storev1pb.FileNode{}, + Symlinks: []*storev1pb.SymlinkNode{}, + } + + assert.Equal(t, uint32(1), d.Size()) + }) + + t.Run("containing single non-empty directory", func(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{{ + Name: "foo", + Digest: dummyDigest, + Size: 4, + }}, + Files: []*storev1pb.FileNode{}, + Symlinks: []*storev1pb.SymlinkNode{}, + } + + assert.Equal(t, uint32(5), d.Size()) + }) + + t.Run("containing single file", func(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{}, + Files: []*storev1pb.FileNode{{ + Name: "foo", + Digest: dummyDigest, + Size: 42, + Executable: false, + }}, + Symlinks: []*storev1pb.SymlinkNode{}, + } + + assert.Equal(t, uint32(1), d.Size()) + }) + + t.Run("containing single symlink", func(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{}, + Files: []*storev1pb.FileNode{}, + Symlinks: []*storev1pb.SymlinkNode{{ + Name: "foo", + Target: "bar", + }}, + } + + assert.Equal(t, uint32(1), d.Size()) + }) + +} +func TestDirectoryDigest(t *testing.T) { + d := storev1pb.Directory{ + Directories: []*storev1pb.DirectoryNode{}, + Files: []*storev1pb.FileNode{}, + Symlinks: []*storev1pb.SymlinkNode{}, + } + + dgst, err := d.Digest() + assert.NoError(t, err, "calling Digest() on a directory shouldn't error") + assert.Equal(t, []byte{ + 0xaf, 0x13, 0x49, 0xb9, 0xf5, 0xf9, 0xa1, 0xa6, 0xa0, 0x40, 0x4d, 0xea, 0x36, 0xdc, + 0xc9, 0x49, 0x9b, 0xcb, 0x25, 0xc9, 0xad, 0xc1, 0x12, 0xb7, 0xcc, 0x9a, 0x93, 0xca, + 0xe4, 0x1f, 0x32, 0x62, + }, dgst) +} diff --git a/tvix/store/protos/go.mod b/tvix/store/protos/go.mod index 6653f1a375d7..8a21555eaad5 100644 --- a/tvix/store/protos/go.mod +++ b/tvix/store/protos/go.mod @@ -1,3 +1,19 @@ module code.tvl.fyi/tvix/store/protos go 1.19 + +require ( + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/klauspost/cpuid/v2 v2.0.9 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/stretchr/testify v1.8.1 // indirect + golang.org/x/net v0.0.0-20220722155237-a158d28d115b // indirect + golang.org/x/sys v0.0.0-20220722155257-8c9f86f7a55f // indirect + golang.org/x/text v0.4.0 // indirect + google.golang.org/genproto v0.0.0-20200526211855-cb27e3aa2013 // indirect + google.golang.org/grpc v1.51.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect + lukechampine.com/blake3 v1.1.7 // indirect +) diff --git a/tvix/store/protos/go.sum b/tvix/store/protos/go.sum new file mode 100644 index 000000000000..7a603cdb120d --- /dev/null +++ b/tvix/store/protos/go.sum @@ -0,0 +1,96 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU= +github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU= +github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw= +github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= +github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c= +github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38= 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