Handle posts without summary metadata.

* ennu.el (ennu--read-post): Export summary metadata only if it is
non-nil.

1 files changed, 2 insertions, 1 deletions

diff --git a/ennu.el b/ennu.el
index adcae17..93abe57 100644
--- a/ennu.el
+++ b/ennu.el
@@ -72,7 +72,8 @@
                            (pcase tangle-output-file
                              ("no" nil)
                              (_ tangle-output-file))))))))
-         :summary (funcall export (first (plist-get metadata :summary)))
+         :summary (when-let (summary (plist-get metadata :summary))
+                    (funcall export (first summary)))
          :tags (plist-get metadata :filetags)
          :thumbnail (or (plist-get metadata :thumbnail)
                         (seq-some (lambda (link)