istio.io/istio@v0.0.0-20240520182934-d79c90f27776/tools/istio-iptables/pkg/capture/util.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 capture
    16  
    17  func CombineMatchers(values []string, matcher func(value string) []string) []string {
    18  	matchers := make([][]string, 0, len(values))
    19  	for _, value := range values {
    20  		matchers = append(matchers, matcher(value))
    21  	}
    22  	return Flatten(matchers...)
    23  }
    24  
    25  func Flatten(lists ...[]string) []string {
    26  	var result []string
    27  	for _, list := range lists {
    28  		result = append(result, list...)
    29  	}
    30  	return result
    31  }