If the OWASP dc XML does not exist, continue reporting after warning #580 (#582)

contrib/owasp-dependency-check/parser/parser.go

@@ -6,6 +6,8 @@ import (
 	"io/ioutil"
 	"os"
 	"strings"
+
+	log "github.com/sirupsen/logrus"
 )
 
 type analysis struct {
@@ -34,13 +36,15 @@ func appendIfMissing(slice []string, str string) []string {
 func Parse(path string) ([]string, error) {
 	file, err := os.Open(path)
 	if err != nil {
-		return nil, fmt.Errorf("Failed to open: %s", err)
+		log.Warnf("OWASP Dependency Check XML is not found: %s", path)
+		return []string{}, nil
 	}
 	defer file.Close()
 
 	b, err := ioutil.ReadAll(file)
 	if err != nil {
-		return nil, fmt.Errorf("Failed to read: %s", err)
+		log.Warnf("Failed to read OWASP Dependency Check XML: %s", path)
+		return []string{}, nil
 	}
 
 	var anal analysis