From: Dan Fuhry <dan@fuhry.com>
Date: Sun, 30 Mar 2025 02:05:50 +0000 (-0400)
Subject: stringmatch: add "any" and "never" matchers
X-Git-Url: https://go.fuhry.dev/?a=commitdiff_plain;h=714a12909fd23b9b95d501ba8cf52a3e8c066e6c;p=runtime.git

stringmatch: add "any" and "never" matchers
---

diff --git a/utils/stringmatch/matchers.go b/utils/stringmatch/matchers.go
index 20ebe25..a46892c 100644
--- a/utils/stringmatch/matchers.go
+++ b/utils/stringmatch/matchers.go
@@ -18,6 +18,8 @@ type Suffix string
 type Exact string
 type Contains string
 type Regexp string
+type Any struct{}
+type Never struct{}
 
 func (s Prefix) Match(input string) bool {
 	return strings.HasPrefix(input, string(s))
@@ -60,6 +62,22 @@ func (s Regexp) String() string {
 	return fmt.Sprintf("%T(%s)", s, string(s))
 }
 
+func (s Any) String() string {
+	return fmt.Sprintf("%T", s)
+}
+
+func (s Any) Match(string) bool {
+	return true
+}
+
+func (s Never) Match(string) bool {
+	return false
+}
+
+func (s Never) String() string {
+	return fmt.Sprintf("%T", s)
+}
+
 type andMatcher struct {
 	matchers []StringMatcher
 }
diff --git a/utils/stringmatch/serialization.go b/utils/stringmatch/serialization.go
index 83935a1..170b815 100644
--- a/utils/stringmatch/serialization.go
+++ b/utils/stringmatch/serialization.go
@@ -54,6 +54,16 @@ func (m *MatchRule) Matcher() (StringMatcher, error) {
 			return nil, errors.New("regexp matcher may not have sub-rules")
 		}
 		return Regexp(m.Value), nil
+	case "any":
+		if m.Value != "" || len(m.Rules) != 0 {
+			return nil, errors.New("any matcher does not accept a value or sub-rules")
+		}
+		return Any{}, nil
+	case "never":
+		if m.Value != "" || len(m.Rules) != 0 {
+			return nil, errors.New("never matcher does not accept a value or sub-rules")
+		}
+		return Never{}, nil
 	case "and":
 		if m.Value != "" {
 			return nil, errors.New("\"and\" matcher may not have a unary value")