istio.io/istio@v0.0.0-20240520182934-d79c90f27776/istioctl/pkg/util/common.go (about)

     1  // Copyright Istio Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package util
    16  
    17  import (
    18  	"fmt"
    19  	"io"
    20  	"strings"
    21  
    22  	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
    23  
    24  	binversion "istio.io/istio/operator/version"
    25  )
    26  
    27  var NeverMatch = &metav1.LabelSelector{
    28  	MatchLabels: map[string]string{
    29  		"istio.io/deactivated": "never-match",
    30  	},
    31  }
    32  
    33  var ManifestsFlagHelpStr = `Specify a path to a directory of charts and profiles
    34  (e.g. ~/Downloads/istio-` + binversion.OperatorVersionString + `/manifests).`
    35  
    36  // CommandParseError distinguishes an error parsing istioctl CLI arguments from an error processing
    37  type CommandParseError struct {
    38  	Err error
    39  }
    40  
    41  func (c CommandParseError) Error() string {
    42  	return c.Err.Error()
    43  }
    44  
    45  // Confirm waits for a user to confirm with the supplied message.
    46  func Confirm(msg string, writer io.Writer) bool {
    47  	for {
    48  		_, _ = fmt.Fprintf(writer, "%s ", msg)
    49  		var response string
    50  		_, err := fmt.Scanln(&response)
    51  		if err != nil {
    52  			return false
    53  		}
    54  		switch strings.ToUpper(response) {
    55  		case "Y", "YES":
    56  			return true
    57  		case "N", "NO":
    58  			return false
    59  		}
    60  	}
    61  }