fix(nodejs): add support for parsing workspaces from package.json as an object

pkg/dependency/parser/nodejs/packagejson/parse.go

@@ -5,6 +5,7 @@ import (
 	"io"
 	"regexp"
 
+	"github.com/samber/lo"
 	"golang.org/x/xerrors"
 
 	"github.com/aquasecurity/trivy/pkg/dependency"
@@ -21,7 +22,7 @@ type packageJSON struct {
 	Dependencies         map[string]string `json:"dependencies"`
 	OptionalDependencies map[string]string `json:"optionalDependencies"`
 	DevDependencies      map[string]string `json:"devDependencies"`
-	Workspaces           []string          `json:"workspaces"`
+	Workspaces           any               `json:"workspaces"`
 }
 
 type Package struct {
@@ -65,7 +66,7 @@ func (p *Parser) Parse(r io.Reader) (Package, error) {
 		Dependencies:         pkgJSON.Dependencies,
 		OptionalDependencies: pkgJSON.OptionalDependencies,
 		DevDependencies:      pkgJSON.DevDependencies,
-		Workspaces:           pkgJSON.Workspaces,
+		Workspaces:           parseWorkspaces(pkgJSON.Workspaces),
 	}, nil
 }
 
@@ -82,6 +83,29 @@ func parseLicense(val interface{}) string {
 	return ""
 }
 
+// parseWorkspaces returns slice of workspaces
+func parseWorkspaces(val any) []string {
+	// Workspaces support 2 types - https://github.com/SchemaStore/schemastore/blob/d9516961f8a5b0e65a457808070147b5a866f60b/src/schemas/json/package.json#L777
+	switch ws := val.(type) {
+	// Workspace as object (map[string][]string)
+	// e.g. "workspaces": {"packages": ["packages/*", "plugins/*"]},
+	case map[string]interface{}:
+		// Take only workspaces for `packages` - https://classic.yarnpkg.com/blog/2018/02/15/nohoist/
+		if pkgsWorkspaces, ok := ws["packages"]; ok {
+			return lo.Map(pkgsWorkspaces.([]interface{}), func(workspace interface{}, _ int) string {
+				return workspace.(string)
+			})
+		}
+	// Workspace as string array
+	// e.g.   "workspaces": ["packages/*", "backend"],
+	case []interface{}:
+		return lo.Map(ws, func(workspace interface{}, _ int) string {
+			return workspace.(string)
+		})
+	}
+	return nil
+}
+
 func IsValidName(name string) bool {
 	// Name is optional field
 	// https://docs.npmjs.com/cli/v9/configuring-npm/package-json#name

pkg/dependency/parser/nodejs/packagejson/parse_test.go

@@ -76,6 +76,20 @@ func TestParse(t *testing.T) {
 				},
 			},
 		},
+		{
+			name:      "happy path - workspace as struct",
+			inputFile: "testdata/workspace_as_map_package.json",
+			want: packagejson.Package{
+				Library: types.Library{
+					ID:      "[email protected]",
+					Name:    "example",
+					Version: "1.0.0",
+				},
+				Workspaces: []string{
+					"packages/*",
+				},
+			},
+		},
 		{
 			name:      "invalid package name",
 			inputFile: "testdata/invalid_name.json",

pkg/dependency/parser/nodejs/packagejson/testdata/workspace_as_map_package.json

@@ -0,0 +1,8 @@
+{
+  "name": "example",
+  "version": "1.0.0",
+  "workspaces": {
+    "packages": ["packages/*"],
+    "nohoist": ["**/react-native", "**/react-native/**"]
+  }
+}