cleanup: normalize to lowercase dois

1 files changed, 2 insertions, 2 deletions

diff --git a/skate/cmd/skate-cleanup/main.go b/skate/cmd/skate-cleanup/main.go
index e81d4ee..969c53c 100644
--- a/skate/cmd/skate-cleanup/main.go
+++ b/skate/cmd/skate-cleanup/main.go
@@ -75,7 +75,7 @@ func urlFilter(p []byte) ([]byte, error) {
 	return []byte(strings.Join(parts, *delimiter)), nil
 }
 
-// doiFilter finds a DOI
+// doiFilter finds a DOI, normalizes to lowercase.
 func doiFilter(p []byte) ([]byte, error) {
 	parts := strings.Split(string(p), *delimiter)
 	if len(parts) < *index {
@@ -91,6 +91,6 @@ func doiFilter(p []byte) ([]byte, error) {
 	if result == "" && *skipNonMatches {
 		return nil, nil
 	}
-	parts[*index-1] = result
+	parts[*index-1] = strings.ToLower(result)
 	return []byte(strings.Join(parts, *delimiter)), nil
 }