go.etcd.io/etcd@v3.3.27+incompatible/etcdctl/ctlv3/command/util.go (about)

     1  // Copyright 2015 The etcd 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 command
    16  
    17  import (
    18  	"context"
    19  	"encoding/hex"
    20  	"fmt"
    21  	"regexp"
    22  
    23  	pb "github.com/coreos/etcd/mvcc/mvccpb"
    24  
    25  	"github.com/spf13/cobra"
    26  )
    27  
    28  func printKV(isHex bool, valueOnly bool, kv *pb.KeyValue) {
    29  	k, v := string(kv.Key), string(kv.Value)
    30  	if isHex {
    31  		k = addHexPrefix(hex.EncodeToString(kv.Key))
    32  		v = addHexPrefix(hex.EncodeToString(kv.Value))
    33  	}
    34  	if !valueOnly {
    35  		fmt.Println(k)
    36  	}
    37  	fmt.Println(v)
    38  }
    39  
    40  func addHexPrefix(s string) string {
    41  	ns := make([]byte, len(s)*2)
    42  	for i := 0; i < len(s); i += 2 {
    43  		ns[i*2] = '\\'
    44  		ns[i*2+1] = 'x'
    45  		ns[i*2+2] = s[i]
    46  		ns[i*2+3] = s[i+1]
    47  	}
    48  	return string(ns)
    49  }
    50  
    51  func argify(s string) []string {
    52  	r := regexp.MustCompile(`"(?:[^"\\]|\\.)*"|'[^']*'|[^'"\s]\S*[^'"\s]?`)
    53  	args := r.FindAllString(s, -1)
    54  	for i := range args {
    55  		if len(args[i]) == 0 {
    56  			continue
    57  		}
    58  		if args[i][0] == '\'' {
    59  			// 'single-quoted string'
    60  			args[i] = args[i][1 : len(args)-1]
    61  		} else if args[i][0] == '"' {
    62  			// "double quoted string"
    63  			if _, err := fmt.Sscanf(args[i], "%q", &args[i]); err != nil {
    64  				ExitWithError(ExitInvalidInput, err)
    65  			}
    66  		}
    67  	}
    68  	return args
    69  }
    70  
    71  func commandCtx(cmd *cobra.Command) (context.Context, context.CancelFunc) {
    72  	timeOut, err := cmd.Flags().GetDuration("command-timeout")
    73  	if err != nil {
    74  		ExitWithError(ExitError, err)
    75  	}
    76  	return context.WithTimeout(context.Background(), timeOut)
    77  }