go.chromium.org/luci@v0.0.0-20240309015107-7cdc2e660f33/bisection/util/regex_util.go (about)

     1  // Copyright 2022 The LUCI 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  	"regexp"
    20  )
    21  
    22  // MatchedNamedGroup matches a string against a regex with named group
    23  // and returns a mapping between the named group and the matches
    24  func MatchedNamedGroup(r *regexp.Regexp, s string) (map[string]string, error) {
    25  	names := r.SubexpNames()
    26  	matches := r.FindStringSubmatch(s)
    27  	result := make(map[string]string)
    28  	if matches != nil {
    29  		for i, name := range names {
    30  			if name != "" {
    31  				result[name] = matches[i]
    32  			}
    33  		}
    34  		return result, nil
    35  	}
    36  	return nil, fmt.Errorf("Could not find matches")
    37  }