feat: add ruby classifier (#1665)

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

syft/pkg/cataloger/binary/cataloger_test.go

@@ -515,6 +515,52 @@ func Test_Cataloger_DefaultClassifiers_PositiveCases(t *testing.T) {
 				Metadata:  metadata("rust-standard-library-linux"),
 			},
 		},
+		{
+			name:       "positive-ruby-3.2.1",
+			fixtureDir: "test-fixtures/classifiers/dynamic/ruby-library-3.2.1",
+			expected: pkg.Package{
+				Name:      "ruby",
+				Version:   "3.2.1",
+				Type:      "binary",
+				PURL:      "pkg:generic/ruby@3.2.1",
+				Locations: locations("ruby", "libruby.so.3.2.1"),
+				Metadata: pkg.BinaryMetadata{
+					Matches: []pkg.ClassifierMatch{
+						match("ruby-binary", "ruby"),
+						match("ruby-binary", "libruby.so.3.2.1"),
+					},
+				},
+			},
+		},
+		{
+			name:       "positive-ruby-2.7.7",
+			fixtureDir: "test-fixtures/classifiers/dynamic/ruby-library-2.7.7",
+			expected: pkg.Package{
+				Name:      "ruby",
+				Version:   "2.7.7p221",
+				Type:      "binary",
+				PURL:      "pkg:generic/ruby@2.7.7p221",
+				Locations: locations("ruby", "libruby.so.2.7.7"),
+				Metadata: pkg.BinaryMetadata{
+					Matches: []pkg.ClassifierMatch{
+						match("ruby-binary", "ruby"),
+						match("ruby-binary", "libruby.so.2.7.7"),
+					},
+				},
+			},
+		},
+		{
+			name:       "positive-ruby-1.9.3p551",
+			fixtureDir: "test-fixtures/classifiers/positive/ruby-1.9.3p551",
+			expected: pkg.Package{
+				Name:      "ruby",
+				Version:   "1.9.3p551",
+				Type:      "binary",
+				PURL:      "pkg:generic/ruby@1.9.3p551",
+				Locations: locations("ruby"),
+				Metadata:  metadata("ruby-binary"),
+			},
+		},
 	}
 
 	for _, test := range tests {

syft/pkg/cataloger/binary/default_classifiers.go

@@ -220,6 +220,20 @@ var defaultClassifiers = []classifier{
 		PURL:    mustPURL("pkg:generic/rust@version"),
 		CPEs:    singleCPE("cpe:2.3:a:rust-lang:rust:*:*:*:*:*:*:*:*"),
 	},
+	{
+		Class:    "ruby-binary",
+		FileGlob: "**/ruby",
+		EvidenceMatcher: evidenceMatchers(
+			rubyMatcher,
+			sharedLibraryLookup(
+				// try to find version information from libruby shared libraries
+				`^libruby\.so.*$`,
+				rubyMatcher),
+		),
+		Package: "ruby",
+		PURL:    mustPURL("pkg:generic/ruby@version"),
+		CPEs:    singleCPE("cpe:2.3:a:ruby-lang:ruby:*:*:*:*:*:*:*:*"),
+	},
 }
 
 // in both binaries and shared libraries, the version pattern is [NUL]3.11.2[NUL]
@@ -229,3 +243,8 @@ var libpythonMatcher = fileNameTemplateVersionMatcher(
 	`(?:.*/|^)libpython(?P<version>[0-9]+(?:\.[0-9]+)+)\.so.*$`,
 	pythonVersionTemplate,
 )
+
+var rubyMatcher = fileContentsVersionMatcher(
+	// ruby 3.2.1 (2023-02-08 revision 31819e82c8) [x86_64-linux]
+	// ruby 2.7.7p221 (2022-11-24 revision 168ec2b1e5) [x86_64-linux]
+	`(?m)ruby (?P<version>[0-9]\.[0-9]\.[0-9](p[0-9]+)?) `)

syft/pkg/cataloger/binary/test-fixtures/Makefile

@@ -2,7 +2,9 @@
 all: \
 	classifiers/dynamic/python-binary-shared-lib-3.11 \
 	classifiers/dynamic/python-binary-shared-lib-redhat-3.9 \
-	classifiers/dynamic/python-binary-with-version-3.9
+	classifiers/dynamic/python-binary-with-version-3.9 \
+	classifiers/dynamic/ruby-library-3.2.1 \
+	classifiers/dynamic/ruby-library-2.7.7
 
 classifiers/dynamic/python-binary-shared-lib-3.11:
 	$(eval $@_image := "python:3.11-slim@sha256:0b106e1d2bf485c2a41474bc9cd5103e9eea4e179f40f10741b53b127059221e")
@@ -28,6 +30,30 @@ classifiers/dynamic/python-binary-with-version-3.9:
 		/usr/bin/python3.9 \
 		$@/python3.9
 
+classifiers/dynamic/ruby-library-3.2.1:
+	$(eval $@_image := "ruby:3.2.1-bullseye@sha256:b4a140656b0c5d26c0a80559b228b4d343f3fdbf56682fcbe88f6db1fa9afa6b")
+	./get-image-file.sh $($@_image) \
+		/usr/local/bin/ruby \
+		$@/ruby
+	./get-image-file.sh $($@_image) \
+		/usr/local/lib/libruby.so.3.2.1 \
+		$@/libruby.so.3.2.1
+	./get-image-file.sh $($@_image) \
+		/usr/local/lib/libruby.so.3.2 \
+		$@/libruby.so.3.2
+
+classifiers/dynamic/ruby-library-2.7.7:
+	$(eval $@_image := "ruby:2.7.7-bullseye@sha256:055191740a063f33fef1f09423e5ed8f91143aae62a3772a90910118464c5120")
+	./get-image-file.sh $($@_image) \
+		/usr/local/bin/ruby \
+		$@/ruby
+	./get-image-file.sh $($@_image) \
+		/usr/local/lib/libruby.so.2.7.7 \
+		$@/libruby.so.2.7.7
+	./get-image-file.sh $($@_image) \
+		/usr/local/lib/libruby.so.2.7 \
+		$@/libruby.so.2.7
+
 .PHONY: clean
 clean:
 	rm -rf classifiers/dynamic

syft/pkg/cataloger/binary/test-fixtures/classifiers/positive/ruby-1.9.3p551/ruby

@@ -0,0 +1,9 @@
+super from singleton method that is defined to multiple classes is not supported; this will be fixed in 1.9.3 or later
+/usr/local/lib/ruby/site_ruby/1.9.1
+/usr/local/lib/ruby/site_ruby/1.9.1/x86_64-linux
+/usr/local/lib/ruby/vendor_ruby/1.9.1
+/usr/local/lib/ruby/vendor_ruby/1.9.1/x86_64-linux
+/usr/local/lib/ruby/1.9.1
+/usr/local/lib/ruby/1.9.1/x86_64-linux
+ruby 1.9.3p551 (2014-11-13 revision 48407) [x86_64-linux]
+1.9.3