Support project previews

1 files changed, 7 insertions, 3 deletions

diff --git a/scripts/metadata_filter.lua b/scripts/metadata_filter.lua
index 499cf3e..21698bd 100644
--- a/scripts/metadata_filter.lua
+++ b/scripts/metadata_filter.lua
@@ -260,14 +260,18 @@ function Meta(meta)
 
     meta.file_out = get_file_out(meta.rewrites, meta.content_dir,
                                  meta.output_dir, meta.file_in)
-    if meta.relative_to == nil then
-        meta.relative_to = meta.file_in
-    end
+    if meta.relative_to == nil then meta.relative_to = meta.file_in end
     meta.relative_to_out = get_file_out(meta.rewrites, meta.content_dir,
                                         meta.output_dir, meta.relative_to)
 
     meta.url = resolve_url(meta.site.url, meta.output_dir, meta.relative_to_out,
                            meta.file_out)
+    if meta.preview ~= nil then
+        meta.preview = pandoc.utils.stringify(meta.preview)
+        meta.preview = meta.file_out:gsub("/index%.html$", "/" .. meta.preview)
+        meta.preview = resolve_url(meta.site.url, meta.output_dir,
+                                   meta.relative_to_out, meta.preview)
+    end
 
     meta.date = format_date(meta.date)
     if meta.last_update ~= nil then