Allow .dockerignore to ignore everything

Change CLI error msg because it was too specific and didn't make sense
when there were errors not related to inaccessible files.

Removed some log.Error() calls since they're not really errors we should
log. Returning the error will be enough.

Closes: #13417

Signed-off-by: Doug Davis <dug@us.ibm.com>

pkg/fileutils/fileutils.go

@@ -40,7 +40,6 @@ func CleanPatterns(patterns []string) ([]string, [][]string, bool, error) {
 		}
 		if Exclusion(pattern) {
 			if len(pattern) == 1 {
-				logrus.Errorf("Illegal exclusion pattern: %s", pattern)
 				return nil, nil, false, errors.New("Illegal exclusion pattern: !")
 			}
 			exceptions = true
@@ -94,7 +93,6 @@ func OptimizedMatches(file string, patterns []string, patDirs [][]string) (bool,
 
 		match, err := filepath.Match(pattern, file)
 		if err != nil {
-			logrus.Errorf("Error matching: %s (pattern: %s)", file, pattern)
 			return false, err
 		}
 
@@ -114,6 +112,7 @@ func OptimizedMatches(file string, patterns []string, patDirs [][]string) (bool,
 	if matched {
 		logrus.Debugf("Skipping excluded path: %s", file)
 	}
+
 	return matched, nil
 }