skip warnings on commented out and empty lines

pkg/filter/driftignore.go

@@ -39,36 +39,40 @@ func (r *DriftIgnore) readIgnoreFile() error {
 		line := scanner.Text()
 		typeVal := readDriftIgnoreLine(line)
 		nbArgs := len(typeVal)
-		if nbArgs < 2 {
-			logrus.WithFields(logrus.Fields{
-				"line": line,
-			}).Warnf("unable to parse line, invalid length, got %d expected >= 2", nbArgs)
-			continue
-		}
-		if nbArgs == 2 { // We want to ignore a resource (type.id)
+		if nbArgs == 0 || strings.HasPrefix(line, "#") {
+			continue // skip empty or commented out lines
+		} else {
+			if nbArgs < 2 {
+				logrus.WithFields(logrus.Fields{
+					"line": line,
+				}).Warnf("unable to parse line, invalid length, got %d expected >= 2", nbArgs)
+				continue
+			}
+			if nbArgs == 2 { // We want to ignore a resource (type.id)
+				logrus.WithFields(logrus.Fields{
+					"type": typeVal[0],
+					"id":   typeVal[1],
+				}).Debug("Found ignore resource rule in .driftignore")
+				r.resExclusionList[strings.Join(typeVal, ".")] = struct{}{}
+				continue
+			}
+			// Here we want to ignore a drift (type.id.path.to.field)
+			res := strings.Join(typeVal[0:2], ".")
+			ignoreSublist, exists := r.driftExclusionList[res]
+			if !exists {
+				ignoreSublist = make([]string, 0, 1)
+			}
+			path := strings.Join(typeVal[2:], ".")
+
 			logrus.WithFields(logrus.Fields{
 				"type": typeVal[0],
 				"id":   typeVal[1],
-			}).Debug("Found ignore resource rule in .driftignore")
-			r.resExclusionList[strings.Join(typeVal, ".")] = struct{}{}
-			continue
-		}
-		// Here we want to ignore a drift (type.id.path.to.field)
-		res := strings.Join(typeVal[0:2], ".")
-		ignoreSublist, exists := r.driftExclusionList[res]
-		if !exists {
-			ignoreSublist = make([]string, 0, 1)
-		}
-		path := strings.Join(typeVal[2:], ".")
+				"path": path,
+			}).Debug("Found ignore resource field rule in .driftignore")
 
-		logrus.WithFields(logrus.Fields{
-			"type": typeVal[0],
-			"id":   typeVal[1],
-			"path": path,
-		}).Debug("Found ignore resource field rule in .driftignore")
-
-		ignoreSublist = append(ignoreSublist, path)
-		r.driftExclusionList[res] = ignoreSublist
+			ignoreSublist = append(ignoreSublist, path)
+			r.driftExclusionList[res] = ignoreSublist
+		}
 	}
 
 	if err := scanner.Err(); err != nil {