Generated go.sum and proto file detection

data/generated.go

@@ -96,6 +96,9 @@ var GeneratedCodeNameMatchers = []GeneratedCodeNameMatcher{
 
 	// Poetry lock
 	nameEndsWith("poetry.lock"),
+
+	// go mod sum file
+	nameEndsWith("go.sum"),
 }
 
 // GeneratedCodeMatcher checks whether the file with the given data is
@@ -113,6 +116,7 @@ var GeneratedCodeMatchers = []GeneratedCodeMatcher{
 	isGeneratedJavaScriptPEGParser,
 	isGeneratedPostScript,
 	isGeneratedGo,
+	isGeneratedProtobufFromGo,
 	isGeneratedProtobuf,
 	isGeneratedJavaScriptProtocolBuffer,
 	isGeneratedApacheThrift,
@@ -339,6 +343,24 @@ func isGeneratedGo(_, ext string, content []byte) bool {
 	return false
 }
 
+func isGeneratedProtobufFromGo(_, ext string, content []byte) bool {
+	if ext != ".proto" {
+		return false
+	}
+	lines := getLines(content, 20)
+	if len(lines) <= 1 {
+		return false
+	}
+
+	for _, line := range lines {
+		if bytes.Contains(line, []byte("This file was autogenerated by go-to-protobuf")) {
+			return true
+		}
+	}
+
+	return false
+}
+
 var protoExtensions = map[string]struct{}{
 	".py":   {},
 	".java": {},