kubernetes verflag 源码
kubernetes verflag 代码
文件路径：/staging/src/k8s.io/component-base/version/verflag/verflag.go
/*
Copyright 2014 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 verflag defines utility functions to handle command line flags
// related to version of Kubernetes.
package verflag
import (
"fmt"
"os"
"strconv"
flag "github.com/spf13/pflag"
"k8s.io/component-base/version"
)
type versionValue int
const (
VersionFalse versionValue = 0
VersionTrue versionValue = 1
VersionRaw versionValue = 2
)
const strRawVersion string = "raw"
func (v *versionValue) IsBoolFlag() bool {
return true
}
func (v *versionValue) Get() interface{} {
return versionValue(*v)
}
func (v *versionValue) Set(s string) error {
if s == strRawVersion {
*v = VersionRaw
return nil
}
boolVal, err := strconv.ParseBool(s)
if boolVal {
*v = VersionTrue
} else {
*v = VersionFalse
}
return err
}
func (v *versionValue) String() string {
if *v == VersionRaw {
return strRawVersion
}
return fmt.Sprintf("%v", bool(*v == VersionTrue))
}
// The type of the flag as required by the pflag.Value interface
func (v *versionValue) Type() string {
return "version"
}
func VersionVar(p *versionValue, name string, value versionValue, usage string) {
*p = value
flag.Var(p, name, usage)
// "--version" will be treated as "--version=true"
flag.Lookup(name).NoOptDefVal = "true"
}
func Version(name string, value versionValue, usage string) *versionValue {
p := new(versionValue)
VersionVar(p, name, value, usage)
return p
}
const versionFlagName = "version"
var (
versionFlag = Version(versionFlagName, VersionFalse, "Print version information and quit")
programName = "Kubernetes"
)
// AddFlags registers this package's flags on arbitrary FlagSets, such that they point to the
// same value as the global flags.
func AddFlags(fs *flag.FlagSet) {
fs.AddFlag(flag.Lookup(versionFlagName))
}
// PrintAndExitIfRequested will check if the -version flag was passed
// and, if so, print the version and exit.
func PrintAndExitIfRequested() {
if *versionFlag == VersionRaw {
fmt.Printf("%#v\n", version.Get())
os.Exit(0)
} else if *versionFlag == VersionTrue {
fmt.Printf("%s %s\n", programName, version.Get())
os.Exit(0)
}
}
相关信息
相关文章
kubernetes apiserver_etcd_test 源码
kubernetes apiserver_kms_test 源码
kubernetes append_or_replace_prefixed_line_test 源码
kubernetes audit_policy_test 源码
0
赞
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦