-
Notifications
You must be signed in to change notification settings - Fork 0
/
cobra.go
117 lines (101 loc) · 3.88 KB
/
cobra.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
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
// Copyright 2018 Istio 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 version
import (
"encoding/json"
"errors"
"fmt"
"github.com/ghodss/yaml"
"github.com/spf13/cobra"
)
// Version holds info for client and control plane versions
type Version struct {
ClientVersion *BuildInfo `json:"clientVersion,omitempty" yaml:"clientVersion,omitempty"`
MeshVersion *MeshInfo `json:"meshVersion,omitempty" yaml:"meshVersion,omitempty"`
}
// GetRemoteVersionFunc is the function protoype to be passed to CobraOptions so that it is
// called when invoking `cmd version`
type GetRemoteVersionFunc func() (*MeshInfo, error)
// CobraOptions holds options to be passed to `CobraCommandWithOptions`
type CobraOptions struct {
// GetRemoteVersion is the function to be invoked to retrieve remote versions for
// Istio components. Optional. If not set, the 'version' subcommand will not attempt
// to connect to a remote side, and CLI flags such as '--remote' will be hidden.
GetRemoteVersion GetRemoteVersionFunc
}
// CobraCommand returns a command used to print version information.
func CobraCommand() *cobra.Command {
return CobraCommandWithOptions(CobraOptions{})
}
// CobraCommandWithOptions returns a command used to print version information.
// It accepts an CobraOptions argument that might modify its behavior
func CobraCommandWithOptions(options CobraOptions) *cobra.Command {
var (
short bool
output string
remote bool
version Version
remoteVersion *MeshInfo
serverErr error
)
cmd := &cobra.Command{
Use: "version",
Short: "Prints out build version information",
RunE: func(cmd *cobra.Command, args []string) error {
if output != "" && output != "yaml" && output != "json" {
return errors.New(`--output must be 'yaml' or 'json'`)
}
version.ClientVersion = &Info
if options.GetRemoteVersion != nil && remote {
remoteVersion, serverErr = options.GetRemoteVersion()
version.MeshVersion = remoteVersion
}
switch output {
case "":
if short {
if remoteVersion != nil {
fmt.Fprintf(cmd.OutOrStdout(), "client version: %s\n", version.ClientVersion.Version)
for _, remote := range *remoteVersion {
fmt.Fprintf(cmd.OutOrStdout(), "%s version: %s\n", remote.Component, remote.Info.Version)
}
} else {
fmt.Fprintf(cmd.OutOrStdout(), "%s\n", version.ClientVersion.Version)
}
} else {
if remoteVersion != nil {
fmt.Fprintf(cmd.OutOrStdout(), "client version: %s\n", version.ClientVersion.LongForm())
for _, remote := range *remoteVersion {
fmt.Fprintf(cmd.OutOrStdout(), "%s version: %s\n", remote.Component, remote.Info.LongForm())
}
} else {
fmt.Fprintf(cmd.OutOrStdout(), "%s\n", version.ClientVersion.LongForm())
}
}
case "yaml":
marshalled, _ := yaml.Marshal(&version)
fmt.Fprintln(cmd.OutOrStdout(), string(marshalled))
case "json":
marshalled, _ := json.MarshalIndent(&version, "", " ")
fmt.Fprintln(cmd.OutOrStdout(), string(marshalled))
}
return serverErr
},
}
cmd.Flags().BoolVarP(&short, "short", "s", false, "Displays a short form of the version information")
cmd.Flags().StringVarP(&output, "output", "o", "", "One of 'yaml' or 'json'.")
if options.GetRemoteVersion != nil {
cmd.Flags().BoolVar(&remote, "remote", false, "Prints remote version information, from the control plane")
}
return cmd
}