1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
|
package exporter_test
import (
"bytes"
"context"
"encoding/base64"
"fmt"
"io"
"os"
"testing"
castorev1pb "code.tvl.fyi/tvix/castore/protos"
"code.tvl.fyi/tvix/nar-bridge/pkg/exporter"
"code.tvl.fyi/tvix/nar-bridge/pkg/importer"
"github.com/stretchr/testify/require"
"lukechampine.com/blake3"
)
func TestFull(t *testing.T) {
// We pipe nar_1094wph9z4nwlgvsd53abfz8i117ykiv5dwnq9nnhz846s7xqd7d.nar to the exporter,
// and store all the file contents and directory objects received in two hashmaps.
// We then feed it to the writer, and test we come up with the same NAR file.
f, err := os.Open("../../testdata/nar_1094wph9z4nwlgvsd53abfz8i117ykiv5dwnq9nnhz846s7xqd7d.nar")
require.NoError(t, err)
narContents, err := io.ReadAll(f)
require.NoError(t, err)
blobsMap := make(map[string][]byte, 0)
directoriesMap := make(map[string]*castorev1pb.Directory)
pathInfo, err := importer.Import(
context.Background(),
bytes.NewBuffer(narContents),
func(blobReader io.Reader) ([]byte, error) {
// read in contents, we need to put it into filesMap later.
contents, err := io.ReadAll(blobReader)
require.NoError(t, err)
dgst := mustBlobDigest(bytes.NewReader(contents))
// put it in filesMap
blobsMap[base64.StdEncoding.EncodeToString(dgst)] = contents
return dgst, nil
},
func(directory *castorev1pb.Directory) ([]byte, error) {
dgst := mustDirectoryDigest(directory)
directoriesMap[base64.StdEncoding.EncodeToString(dgst)] = directory
return dgst, nil
},
)
require.NoError(t, err)
// done populating everything, now actually test the export :-)
var buf bytes.Buffer
err = exporter.Export(
&buf,
pathInfo,
func(directoryDgst []byte) (*castorev1pb.Directory, error) {
d, found := directoriesMap[base64.StdEncoding.EncodeToString(directoryDgst)]
if !found {
panic(fmt.Sprintf("directory %v not found", base64.StdEncoding.EncodeToString(directoryDgst)))
}
return d, nil
},
func(blobDgst []byte) (io.ReadCloser, error) {
blobContents, found := blobsMap[base64.StdEncoding.EncodeToString(blobDgst)]
if !found {
panic(fmt.Sprintf("blob %v not found", base64.StdEncoding.EncodeToString(blobDgst)))
}
return io.NopCloser(bytes.NewReader(blobContents)), nil
},
)
require.NoError(t, err, "exporter shouldn't fail")
require.Equal(t, narContents, buf.Bytes())
}
func mustDirectoryDigest(d *castorev1pb.Directory) []byte {
dgst, err := d.Digest()
if err != nil {
panic(err)
}
return dgst
}
func mustBlobDigest(r io.Reader) []byte {
hasher := blake3.New(32, nil)
_, err := io.Copy(hasher, r)
if err != nil {
panic(err)
}
return hasher.Sum([]byte{})
}
|
