(feat): apply error face if file link is broken (#560)

CHANGELOG.md

@@ -14,6 +14,7 @@
 ### Features
 * [#538](https://github.com/jethrokuan/org-roam/pull/538) Optionally use text in first headline as title
 * [#553](https://github.com/jethrokuan/org-roam/pull/553) Add prefix argument to `org-roam-db-build-cache` for forcing rebuilds
+* [#560](https://github.com/jethrokuan/org-roam/pull/560) Apply 'error face to distinguish broken links
 
 ## 1.1.0 (21-04-2020)
 

org-roam.el

@@ -644,7 +644,9 @@ Applies `org-roam-link-current' if PATH corresponds to the
 currently opened Org-roam file in the backlink buffer, or
 `org-roam-link-face' if PATH corresponds to any other Org-roam
 file."
-  (cond ((and (org-roam--in-buffer-p)
+  (cond ((not (file-exists-p path))
+         'error)
+        ((and (org-roam--in-buffer-p)
               (org-roam--backlink-to-current-p))
          'org-roam-link-current)
         ((org-roam--org-roam-file-p path)