feat: add memcached classifier (#1486)

Signed-off-by: witchcraze <witchcraze@gmail.com>

syft/pkg/cataloger/binary/cataloger_test.go

@@ -17,6 +17,20 @@ func TestClassifierCataloger_DefaultClassifiers_PositiveCases(t *testing.T) {
 		fixtureDir string
 		expected   pkg.Package
 	}{
+		{
+			name:       "positive-memcached-1.6.18",
+			fixtureDir: "test-fixtures/classifiers/positive/memcached-1.6.18",
+			expected: pkg.Package{
+				Name:      "memcached",
+				Version:   "1.6.18",
+				Type:      "binary",
+				PURL:      "pkg:generic/memcached@1.6.18",
+				Locations: singleLocation("memcached"),
+				Metadata: pkg.BinaryMetadata{
+					Classifier: "memcached-binary",
+				},
+			},
+		},
 		{
 			name:       "positive-httpd-2.4.54",
 			fixtureDir: "test-fixtures/classifiers/positive/httpd-2.4.54",
@@ -30,7 +44,8 @@ func TestClassifierCataloger_DefaultClassifiers_PositiveCases(t *testing.T) {
 					Classifier: "httpd-binary",
 				},
 			},
-		}, {
+		},
+		{
 			name:       "positive-php-cli-8.2.1",
 			fixtureDir: "test-fixtures/classifiers/positive/php-cli-8.2.1",
 			expected: pkg.Package{

syft/pkg/cataloger/binary/default_classifiers.go

@@ -141,4 +141,12 @@ var defaultClassifiers = []classifier{
 		PURL:    mustPURL("pkg:generic/httpd@version"),
 		CPEs:    singleCPE("cpe:2.3:a:apache:http_server:*:*:*:*:*:*:*:*"),
 	},
+	{
+		Class:    "memcached-binary",
+		FileGlob: "**/memcached",
+		EvidenceMatcher: fileContentsVersionMatcher(
+			`(?m)memcached\s(?P<version>[0-9]+\.[0-9]+\.[0-9]+)`),
+		Package: "memcached",
+		PURL:    mustPURL("pkg:generic/memcached@version"),
+	},
 }

syft/pkg/cataloger/binary/test-fixtures/classifiers/positive/memcached-1.6.18/memcached

@@ -0,0 +1,13 @@
+secs_since_last_cmd
+listen
+memcached 1.6.18
+udp-port
+memcached 1.6.18
+Failed to allocate memory
+%s,%s
+--
+bget
+flush_all
+VERSION 1.6.18
+quit
+BADCLASS invalid class id