github.com/waldiirawan/apm-agent-go/v2@v2.2.2/internal/configutil/wildcards.go (about)

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     3  // this work for additional information regarding copyright
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     5  // the Apache License, Version 2.0 (the "License"); you may
     6  // not use this file except in compliance with the License.
     7  // You may obtain a copy of the License at
     8  //
     9  //     http://www.apache.org/licenses/LICENSE-2.0
    10  //
    11  // Unless required by applicable law or agreed to in writing,
    12  // software distributed under the License is distributed on an
    13  // "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
    14  // KIND, either express or implied.  See the License for the
    15  // specific language governing permissions and limitations
    16  // under the License.
    17  
    18  package configutil
    19  
    20  import (
    21  	"strings"
    22  
    23  	"github.com/waldiirawan/apm-agent-go/v2/internal/wildcard"
    24  )
    25  
    26  // ParseWildcardPatterns parses s as a comma-separated list of wildcard patterns,
    27  // and returns wildcard.Matchers for each.
    28  //
    29  // Patterns support the "*" wildcard, which will match zero or more characters.
    30  // A prefix of (?-i) treats the pattern case-sensitively, while a prefix of (?i)
    31  // treats the pattern case-insensitively (the default). All other characters in
    32  // the pattern are matched exactly.
    33  func ParseWildcardPatterns(s string) wildcard.Matchers {
    34  	patterns := ParseList(s, ",")
    35  	matchers := make(wildcard.Matchers, len(patterns))
    36  	for i, p := range patterns {
    37  		matchers[i] = ParseWildcardPattern(p)
    38  	}
    39  	return matchers
    40  }
    41  
    42  // ParseWildcardPattern parses p as a wildcard pattern, returning a wildcard.Matcher.
    43  //
    44  // Patterns support the "*" wildcard, which will match zero or more characters.
    45  // A prefix of (?-i) treats the pattern case-sensitively, while a prefix of (?i)
    46  // treats the pattern case-insensitively (the default). All other characters in
    47  // the pattern are matched exactly.
    48  func ParseWildcardPattern(p string) *wildcard.Matcher {
    49  	const (
    50  		caseSensitivePrefix   = "(?-i)"
    51  		caseInsensitivePrefix = "(?i)"
    52  	)
    53  	caseSensitive := wildcard.CaseInsensitive
    54  	switch {
    55  	case strings.HasPrefix(p, caseSensitivePrefix):
    56  		caseSensitive = wildcard.CaseSensitive
    57  		p = p[len(caseSensitivePrefix):]
    58  	case strings.HasPrefix(p, caseInsensitivePrefix):
    59  		p = p[len(caseInsensitivePrefix):]
    60  	}
    61  	return wildcard.NewMatcher(p, caseSensitive)
    62  }