github.com/GoogleCloudPlatform/compute-image-tools/cli_tools@v0.0.0-20240516224744-de2dabc4ed1b/common/utils/flags/string_utils.go (about)

     1  //  Copyright 2020 Google Inc. All Rights Reserved.
     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 flags
    16  
    17  import "strings"
    18  
    19  // TrimmedString is an implementation of flag.Value that trims whitespace
    20  // from the incoming argument prior to storing it.
    21  type TrimmedString string
    22  
    23  // String returns string representation of TrimmedString.
    24  func (s TrimmedString) String() string { return (string)(s) }
    25  
    26  // Set trims whitespace from input string and stores in TrimmedString.
    27  func (s *TrimmedString) Set(input string) error {
    28  	*s = TrimmedString(strings.TrimSpace(input))
    29  	return nil
    30  }
    31  
    32  // LowerTrimmedString is an implementation of flag.Value that trims whitespace
    33  // and converts to lowercase the incoming argument prior to storing it.
    34  type LowerTrimmedString string
    35  
    36  // String returns string representation of LowerTrimmedString.
    37  func (s LowerTrimmedString) String() string { return (string)(s) }
    38  
    39  // Set trims whitespace from input string and converts the string to lowercase,
    40  // then stores in LowerTrimmedString.
    41  func (s *LowerTrimmedString) Set(input string) error {
    42  	*s = LowerTrimmedString(strings.ToLower(strings.TrimSpace(input)))
    43  	return nil
    44  }