sync: Allow empty files

admin/sync/exercice_files.go

@@ -60,7 +60,7 @@ func BuildFilesListInto(i Importer, exercice *fic.Exercice, into string) (files
 	// Parse DIGESTS.txt
 	if digs, err := GetFileContent(i, path.Join(exercice.Path, into, "DIGESTS.txt")); err != nil {
 		errs = multierr.Append(errs, NewExerciceError(exercice, fmt.Errorf("unable to read %s: %w", path.Join(into, "DIGESTS.txt"), err)))
-	} else {
+	} else if len(digs) > 0 {
 		digests = map[string][]byte{}
 		for nline, d := range strings.Split(digs, "\n") {
 			if dsplt := strings.SplitN(d, " ", 2); len(dsplt) < 2 {

admin/sync/file.go

@@ -172,10 +172,6 @@ func GetFileContent(i Importer, URI string) (string, error) {
 			buf = append(buf, b)
 		}
 
-		if len(buf) == 0 {
-			return "", fmt.Errorf("File is empty")
-		}
-
 		return strings.TrimSpace(string(buf)), nil
 	}
 }