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
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
|
// Copyright 2023 CUE Labs AG
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package main
import (
_ "embed"
"flag"
"fmt"
"net"
"net/http"
"os"
"reflect"
"cuelabs.dev/go/oci/ociregistry/ociserver"
"github.com/cue-exp/cueconfig"
"github.com/go-json-experiment/json"
"github.com/go-json-experiment/json/jsontext"
)
var (
//go:embed schema.cue
configSchema []byte
//go:embed defaults.cue
configDefaults []byte
)
type config struct {
Registry registry `json:"registry"`
ListenAddr string `json:"listenAddr"`
}
func main() {
if err := main1(); err != nil {
fmt.Fprintf(os.Stderr, "ociregistry: %v\n", err)
os.Exit(1)
}
}
var writeNetAddr func(l net.Listener)
func main1() error {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "usage: ocisrv $configfile.cue\n")
os.Exit(2)
}
flag.Parse()
if flag.NArg() != 1 {
flag.Usage()
}
configFile := flag.Arg(0)
// Don't decode into Go struct yet because we want to use
// json v2 for that so we can decode into the registry interface
// type.
var cfgRaw jsontext.Value
if err := cueconfig.Load(configFile, configSchema, configDefaults, nil, &cfgRaw); err != nil {
return err
}
cfg, err := unmarshalConfig(cfgRaw)
if err != nil {
return fmt.Errorf("cannot decode config: %v", err)
}
r, err := cfg.Registry.new()
if err != nil {
return fmt.Errorf("cannot construct registry: %v", err)
}
l, err := net.Listen("tcp", cfg.ListenAddr)
if err != nil {
return fmt.Errorf("cannot listen on %q: %v", cfg.ListenAddr, err)
}
if writeNetAddr != nil {
writeNetAddr(l)
}
fmt.Printf("listening on %v\n", l.Addr())
err = http.Serve(l, ociserver.New(r, nil))
return fmt.Errorf("http server error: %v", err)
}
func unmarshalConfig(cfgRaw []byte) (*config, error) {
var cfg config
if err := json.Unmarshal(cfgRaw, &cfg, json.WithUnmarshalers(
json.UnmarshalFuncV2(unmarshalRegistry),
)); err != nil {
return nil, err
}
return &cfg, nil
}
func unmarshalRegistry(dec *jsontext.Decoder, rp *registry, opts json.Options) error {
var data jsontext.Value
if err := json.UnmarshalDecode(dec, &data, opts); err != nil {
return err
}
var kind struct {
Kind string `json:"kind"`
}
if err := json.Unmarshal(data, &kind); err != nil {
return err
}
t := kindToRegistryType[kind.Kind]
if t == nil {
return fmt.Errorf("no registry type found for kind %q", kind.Kind)
}
r := reflect.New(t)
if err := json.Unmarshal(data, r.Interface()); err != nil {
return err
}
*rp = r.Elem().Interface().(registry)
return nil
}
|
