-
Notifications
You must be signed in to change notification settings - Fork 1.5k
/
root.go
144 lines (132 loc) · 4.05 KB
/
root.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
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
/*
Copyright 2018 The Kubernetes 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 kind implements the root kind cobra command, and the cli Main()
package kind
import (
"io"
"io/ioutil"
"github.com/spf13/cobra"
"sigs.k8s.io/kind/pkg/cmd"
"sigs.k8s.io/kind/pkg/cmd/kind/build"
"sigs.k8s.io/kind/pkg/cmd/kind/completion"
"sigs.k8s.io/kind/pkg/cmd/kind/create"
"sigs.k8s.io/kind/pkg/cmd/kind/delete"
"sigs.k8s.io/kind/pkg/cmd/kind/export"
"sigs.k8s.io/kind/pkg/cmd/kind/get"
"sigs.k8s.io/kind/pkg/cmd/kind/load"
"sigs.k8s.io/kind/pkg/cmd/kind/version"
"sigs.k8s.io/kind/pkg/log"
)
type flagpole struct {
LogLevel string
Verbosity int32
Quiet bool
}
// NewCommand returns a new cobra.Command implementing the root command for kind
func NewCommand(logger log.Logger, streams cmd.IOStreams) *cobra.Command {
flags := &flagpole{}
cmd := &cobra.Command{
Args: cobra.NoArgs,
Use: "kind",
Short: "kind is a tool for managing local Kubernetes clusters",
Long: "kind creates and manages local Kubernetes clusters using Docker container 'nodes'",
PersistentPreRunE: func(cmd *cobra.Command, args []string) error {
return runE(logger, flags, cmd)
},
SilenceUsage: true,
SilenceErrors: true,
Version: version.Version(),
}
cmd.SetOut(streams.Out)
cmd.SetErr(streams.ErrOut)
cmd.PersistentFlags().StringVar(
&flags.LogLevel,
"loglevel",
"",
"DEPRECATED: see -v instead",
)
cmd.PersistentFlags().Int32VarP(
&flags.Verbosity,
"verbosity",
"v",
0,
"info log verbosity, higher value produces more output",
)
cmd.PersistentFlags().BoolVarP(
&flags.Quiet,
"quiet",
"q",
false,
"silence all stderr output",
)
// add all top level subcommands
cmd.AddCommand(build.NewCommand(logger, streams))
cmd.AddCommand(completion.NewCommand(logger, streams))
cmd.AddCommand(create.NewCommand(logger, streams))
cmd.AddCommand(delete.NewCommand(logger, streams))
cmd.AddCommand(export.NewCommand(logger, streams))
cmd.AddCommand(get.NewCommand(logger, streams))
cmd.AddCommand(version.NewCommand(logger, streams))
cmd.AddCommand(load.NewCommand(logger, streams))
return cmd
}
func runE(logger log.Logger, flags *flagpole, command *cobra.Command) error {
// handle limited migration for --loglevel
setLogLevel := command.Flag("loglevel").Changed
setVerbosity := command.Flag("verbosity").Changed
if setLogLevel && !setVerbosity {
switch flags.LogLevel {
case "debug":
flags.Verbosity = 3
case "trace":
flags.Verbosity = 2147483647
}
}
// normal logger setup
if flags.Quiet {
// NOTE: if we are coming from app.Run handling this flag is
// redundant, however it doesn't hurt, and this may be called directly.
maybeSetWriter(logger, ioutil.Discard)
}
maybeSetVerbosity(logger, log.Level(flags.Verbosity))
// warn about deprecated flag if used
if setLogLevel {
if cmd.ColorEnabled(logger) {
logger.Warn("\x1b[93mWARNING\x1b[0m: --loglevel is deprecated, please switch to -v and -q!")
} else {
logger.Warn("WARNING: --loglevel is deprecated, please switch to -v and -q!")
}
}
return nil
}
// maybeSetWriter will call logger.SetWriter(w) if logger has a SetWriter method
func maybeSetWriter(logger log.Logger, w io.Writer) {
type writerSetter interface {
SetWriter(io.Writer)
}
v, ok := logger.(writerSetter)
if ok {
v.SetWriter(w)
}
}
// maybeSetVerbosity will call logger.SetVerbosity(verbosity) if logger
// has a SetVerbosity method
func maybeSetVerbosity(logger log.Logger, verbosity log.Level) {
type verboser interface {
SetVerbosity(log.Level)
}
v, ok := logger.(verboser)
if ok {
v.SetVerbosity(verbosity)
}
}