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
|
// Copyright The Notary Project 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 cli
import (
"fmt"
"os"
"sort"
"strings"
"github.com/notaryproject/notation-plugin-framework-go/internal/slices"
"github.com/notaryproject/notation-plugin-framework-go/plugin"
)
func getValidArgsString(md *plugin.GetMetadataResponse) string {
return fmt.Sprintf(`<%s>`, strings.Join(getValidArgs(md), "|"))
}
// getValidArgs returns list of valid arguments depending upon the plugin capabilities
func getValidArgs(md *plugin.GetMetadataResponse) []string {
args := []string{
string(plugin.CommandGetMetadata), string(plugin.Version),
}
if slices.Contains(md.Capabilities, plugin.CapabilitySignatureGenerator) {
args = append(args, string(plugin.CommandGenerateSignature), string(plugin.CommandDescribeKey))
}
if slices.Contains(md.Capabilities, plugin.CapabilityEnvelopeGenerator) {
args = append(args, string(plugin.CommandGenerateEnvelope))
}
if slices.Contains(md.Capabilities, plugin.CapabilityTrustedIdentityVerifier) || slices.Contains(md.Capabilities, plugin.CapabilityRevocationCheckVerifier) {
args = append(args, string(plugin.CommandVerifySignature))
}
sort.Strings(args)
return args
}
// deliverError print to standard error and then return nonzero exit code
func deliverError(message string) {
_, _ = fmt.Fprint(os.Stderr, message)
os.Exit(1)
}
// deferStdout is used to make sure that nothing get emitted to stdout and stderr until intentionally rescued.
// This is required to make sure that the plugin or its dependency doesn't interfere with notation <-> plugin communication
func deferStdout() func() {
// Ignoring error because we don't want plugin to fail if `os.DevNull` is misconfigured.
null, _ := os.Open(os.DevNull)
sout := os.Stdout
serr := os.Stderr
os.Stdout = null
os.Stderr = null
return func() {
err := null.Close()
if err != nil {
return
}
os.Stdout = sout
os.Stderr = serr
}
}
// discardLogger implements Logger but logs nothing. It is used when user
// disenabled logging option in notation, i.e. loggerKey is not in the context.
type discardLogger struct{}
func (dl *discardLogger) Debug(_ ...interface{}) {
}
func (dl *discardLogger) Debugf(_ string, _ ...interface{}) {
}
func (dl *discardLogger) Debugln(_ ...interface{}) {
}
func (dl *discardLogger) Info(_ ...interface{}) {
}
func (dl *discardLogger) Infof(_ string, _ ...interface{}) {
}
func (dl *discardLogger) Infoln(_ ...interface{}) {
}
func (dl *discardLogger) Warn(_ ...interface{}) {
}
func (dl *discardLogger) Warnf(_ string, _ ...interface{}) {
}
func (dl *discardLogger) Warnln(_ ...interface{}) {
}
func (dl *discardLogger) Error(_ ...interface{}) {
}
func (dl *discardLogger) Errorf(_ string, _ ...interface{}) {
}
func (dl *discardLogger) Errorln(_ ...interface{}) {
}
|
