Merging upstream version 1.45.3+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 65 insertions, 0 deletions

diff --git a/src/go/collectors/go.d.plugin/pkg/matcher/simple_patterns.go b/src/go/collectors/go.d.plugin/pkg/matcher/simple_patterns.go
new file mode 100644
index 000000000..0c1d69fc6
--- /dev/null
+++ b/src/go/collectors/go.d.plugin/pkg/matcher/simple_patterns.go
@@ -0,0 +1,65 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+package matcher
+
+import (
+	"strings"
+)
+
+type (
+	simplePatternTerm struct {
+		matcher  Matcher
+		positive bool
+	}
+
+	// simplePatternsMatcher patterns.
+	simplePatternsMatcher []simplePatternTerm
+)
+
+// NewSimplePatternsMatcher creates new simple patterns. It returns error in case one of patterns has bad syntax.
+func NewSimplePatternsMatcher(expr string) (Matcher, error) {
+	var ps simplePatternsMatcher
+
+	for _, pattern := range strings.Fields(expr) {
+		if err := ps.add(pattern); err != nil {
+			return nil, err
+		}
+	}
+	if len(ps) == 0 {
+		return FALSE(), nil
+	}
+	return ps, nil
+}
+
+func (m *simplePatternsMatcher) add(term string) error {
+	p := simplePatternTerm{}
+	if term[0] == '!' {
+		p.positive = false
+		term = term[1:]
+	} else {
+		p.positive = true
+	}
+	matcher, err := NewGlobMatcher(term)
+	if err != nil {
+		return err
+	}
+
+	p.matcher = matcher
+	*m = append(*m, p)
+
+	return nil
+}
+
+func (m simplePatternsMatcher) Match(b []byte) bool {
+	return m.MatchString(string(b))
+}
+
+// MatchString matches.
+func (m simplePatternsMatcher) MatchString(line string) bool {
+	for _, p := range m {
+		if p.matcher.MatchString(line) {
+			return p.positive
+		}
+	}
+	return false
+}