mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-30 18:20:19 +00:00
80 lines
2.2 KiB
Go
80 lines
2.2 KiB
Go
/*
|
|
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 flag
|
|
|
|
import (
|
|
"bytes"
|
|
"fmt"
|
|
"io"
|
|
"strings"
|
|
|
|
"github.com/spf13/pflag"
|
|
)
|
|
|
|
// NamedFlagSets stores named flag sets in the order of calling FlagSet.
|
|
type NamedFlagSets struct {
|
|
// Order is an ordered list of flag set names.
|
|
Order []string
|
|
// FlagSets stores the flag sets by name.
|
|
FlagSets map[string]*pflag.FlagSet
|
|
}
|
|
|
|
// FlagSet returns the flag set with the given name and adds it to the
|
|
// ordered name list if it is not in there yet.
|
|
func (nfs *NamedFlagSets) FlagSet(name string) *pflag.FlagSet {
|
|
if nfs.FlagSets == nil {
|
|
nfs.FlagSets = map[string]*pflag.FlagSet{}
|
|
}
|
|
if _, ok := nfs.FlagSets[name]; !ok {
|
|
nfs.FlagSets[name] = pflag.NewFlagSet(name, pflag.ExitOnError)
|
|
nfs.Order = append(nfs.Order, name)
|
|
}
|
|
return nfs.FlagSets[name]
|
|
}
|
|
|
|
// PrintSections prints the given names flag sets in sections, with the maximal given column number.
|
|
// If cols is zero, lines are not wrapped.
|
|
func PrintSections(w io.Writer, fss NamedFlagSets, cols int) {
|
|
for _, name := range fss.Order {
|
|
fs := fss.FlagSets[name]
|
|
if !fs.HasFlags() {
|
|
continue
|
|
}
|
|
|
|
wideFS := pflag.NewFlagSet("", pflag.ExitOnError)
|
|
wideFS.AddFlagSet(fs)
|
|
|
|
var zzz string
|
|
if cols > 24 {
|
|
zzz = strings.Repeat("z", cols-24)
|
|
wideFS.Int(zzz, 0, strings.Repeat("z", cols-24))
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
fmt.Fprintf(&buf, "\n%s flags:\n\n%s", strings.ToUpper(name[:1])+name[1:], wideFS.FlagUsagesWrapped(cols))
|
|
|
|
if cols > 24 {
|
|
i := strings.Index(buf.String(), zzz)
|
|
lines := strings.Split(buf.String()[:i], "\n")
|
|
fmt.Fprint(w, strings.Join(lines[:len(lines)-1], "\n"))
|
|
fmt.Fprintln(w)
|
|
} else {
|
|
fmt.Fprint(w, buf.String())
|
|
}
|
|
}
|
|
}
|