Improving buildDescriptorExcludeList for npm (#4976)

Signed-off-by: Vijayan T <[email protected]>

Author: vijayanjay

pkg/whitesource/configHelper.go

@@ -266,6 +266,19 @@ func (c *ConfigOptions) addBuildToolDefaults(config *ScanOptions, utils Utils) e
 		}
 
 	}
+	if config.BuildTool == "npm" {
+		if len(config.BuildDescriptorExcludeList) > 0 {
+			var excludePaths []string
+			for _, buildDescriptor := range config.BuildDescriptorExcludeList {
+				if strings.HasSuffix(buildDescriptor, "pom.xml") {
+					continue
+				}
+				modulePath, _ := filepath.Split(buildDescriptor)
+				excludePaths = append(excludePaths, modulePath)
+			}
+			*c = append(*c, ConfigOption{Name: "npm.ignoreDirectoryPatterns", Value: strings.Join(excludePaths, ",")})
+		}
+	}
 
 	if config.BuildTool == "docker" {
 		// for now only support default name of Dockerfile