fix(purl): handle rust types (#5186)

Signed-off-by: knqyf263 <knqyf263@gmail.com>

Author: knqyf263

pkg/purl/purl.go

@@ -375,6 +375,8 @@ func purlType(t string) string {
 		return packageurl.TypeConan
 	case ftypes.Pub:
 		return TypeDart // TODO: replace with packageurl.TypeDart once they add it.
+	case ftypes.RustBinary, ftypes.Cargo:
+		return packageurl.TypeCargo
 	case os.Alpine:
 		return TypeAPK
 	case os.Debian, os.Ubuntu:

pkg/purl/purl_test.go

@@ -185,10 +185,15 @@ func TestNewPackageURL(t *testing.T) {
 			name: "hex package",
 			typ:  ftypes.Hex,
 			pkg: ftypes.Package{
-				ID:        "bunt@0.2.0",
-				Name:      "bunt",
-				Version:   "0.2.0",
-				Locations: []ftypes.Location{{StartLine: 2, EndLine: 2}},
+				ID:      "bunt@0.2.0",
+				Name:    "bunt",
+				Version: "0.2.0",
+				Locations: []ftypes.Location{
+					{
+						StartLine: 2,
+						EndLine:   2,
+					},
+				},
 			},
 			want: purl.PackageURL{
 				PackageURL: packageurl.PackageURL{
@@ -247,6 +252,22 @@ func TestNewPackageURL(t *testing.T) {
 				},
 			},
 		},
+		{
+			name: "rust binary",
+			typ:  ftypes.RustBinary,
+			pkg: ftypes.Package{
+				ID:      "abomonation@0.7.3",
+				Name:    "abomonation",
+				Version: "0.7.3",
+			},
+			want: purl.PackageURL{
+				PackageURL: packageurl.PackageURL{
+					Type:    packageurl.TypeCargo,
+					Name:    "abomonation",
+					Version: "0.7.3",
+				},
+			},
+		},
 		{
 			name: "os package",
 			typ:  os.RedHat,