-
Notifications
You must be signed in to change notification settings - Fork 0
/
jsonnetfile.go
90 lines (75 loc) · 2.08 KB
/
jsonnetfile.go
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
// Copyright 2018 jsonnet-bundler authors
//
// 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 jsonnetfile
import (
"encoding/json"
"os"
"github.com/pkg/errors"
v0 "github.com/dadav/jsonnet-bundler-ng/spec/v0"
v1 "github.com/dadav/jsonnet-bundler-ng/spec/v1"
)
const (
File = "jsonnetfile.json"
LockFile = "jsonnetfile.lock.json"
)
var ErrUpdateJB = errors.New("jsonnetfile version unknown, update jb")
// Load reads a jsonnetfile.(lock).json from disk
func Load(filepath string) (v1.JsonnetFile, error) {
bytes, err := os.ReadFile(filepath)
if err != nil {
return v1.New(), err
}
return Unmarshal(bytes)
}
// Unmarshal creates a spec.JsonnetFile from bytes. Empty bytes
// will create an empty spec.
func Unmarshal(bytes []byte) (v1.JsonnetFile, error) {
m := v1.New()
if len(bytes) == 0 {
return m, nil
}
versions := struct {
Version uint `json:"version"`
}{}
err := json.Unmarshal(bytes, &versions)
if err != nil {
return m, err
}
switch versions.Version {
case v0.Version:
var mv0 v0.JsonnetFile
if err := json.Unmarshal(bytes, &mv0); err != nil {
return m, errors.Wrap(err, "failed to unmarshal jsonnetfile")
}
return v1.FromV0(mv0)
case v1.Version:
if err := json.Unmarshal(bytes, &m); err != nil {
return m, errors.Wrap(err, "failed to unmarshal v1 file")
}
return m, nil
default:
return m, ErrUpdateJB
}
}
// Exists returns whether the file at the given path exists
func Exists(path string) (bool, error) {
_, err := os.Stat(path)
if os.IsNotExist(err) {
return false, nil
}
if err != nil {
return false, err
}
return true, nil
}