60 lines
1.1 KiB
Go
60 lines
1.1 KiB
Go
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package parse
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import (
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"fmt"
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"regexp"
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"strings"
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"github.com/prometheus/prometheus/pkg/labels"
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)
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var (
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re = regexp.MustCompile(`(?:\s?)(\w+)(=|=~|!=|!~)\"((?:\W*|\w*)+)\"`)
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typeMap = map[string]labels.MatchType{
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"=": labels.MatchEqual,
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"!=": labels.MatchNotEqual,
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"=~": labels.MatchRegexp,
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"!~": labels.MatchNotRegexp,
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}
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)
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func Matchers(s string) ([]*labels.Matcher, error) {
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matchers := []*labels.Matcher{}
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if strings.HasPrefix(s, "{") {
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s = s[1:]
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}
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if strings.HasSuffix(s, "}") {
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s = s[:len(s)-1]
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}
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for _, toParse := range strings.Split(s, ",") {
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m, err := Matcher(toParse)
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if err != nil {
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return nil, err
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}
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matchers = append(matchers, m)
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}
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return matchers, nil
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}
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func Matcher(s string) (*labels.Matcher, error) {
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ms := re.FindStringSubmatch(s)
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if len(ms) < 4 {
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return nil, fmt.Errorf("bad matcher format")
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}
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var (
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name = ms[1]
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value = ms[3]
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matchType, prs = typeMap[ms[2]]
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)
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if name == "" || value == "" || !prs {
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return nil, fmt.Errorf("failed to parse")
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}
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m, err := labels.NewMatcher(matchType, name, value)
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if err != nil {
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return nil, err
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}
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return m, nil
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}
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