istio.io/istio@v0.0.0-20240520182934-d79c90f27776/pkg/util/shellescape/quote.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 shellescape
    16  
    17  import (
    18  	"regexp"
    19  	"strings"
    20  )
    21  
    22  var unsafeValue = regexp.MustCompile(`[^\\w@%+=:,./-]`)
    23  
    24  func Quote(s string) string {
    25  	// ported from https://github.com/chrissimpkins/shellescape/blob/master/lib/shellescape/main.py
    26  	if len(s) == 0 {
    27  		return "''"
    28  	}
    29  
    30  	if unsafeValue.MatchString(s) {
    31  		return "'" + strings.ReplaceAll(s, "'", "'\"'\"'") + "'"
    32  	}
    33  
    34  	return s
    35  }