X-Git-Url: https://git.arvados.org/arvados.git/blobdiff_plain/7385689b6fd8df96434aadf7c0377d684c4abe1c..f42ee7c19b794e25db30051b1dfc4bee83929bcd:/doc/zenweb-liquid.rb

diff --git a/doc/zenweb-liquid.rb b/doc/zenweb-liquid.rb
index baa8fe42db..3e8672e021 100644
--- a/doc/zenweb-liquid.rb
+++ b/doc/zenweb-liquid.rb
@@ -50,7 +50,7 @@ module Zenweb
       Liquid::Tag.instance_method(:initialize).bind(self).call(tag_name, markup, tokens)
 
       if markup =~ Syntax
-        @template_name = $1
+        @template_name_expr = $1
         @language = $3
         @attributes    = {}
       else
@@ -61,9 +61,14 @@ module Zenweb
     def render(context)
       require 'coderay'
 
-      partial = load_cached_partial(context)
+      partial = load_cached_partial(@template_name_expr, context)
       html = ''
 
+      # be explicit about errors
+      context.exception_renderer = lambda do |exc|
+        exc.is_a?(Liquid::InternalError) ? "Liquid error: #{exc.cause.message}" : exc
+      end
+
       context.stack do
         html = CodeRay.scan(partial.root.nodelist.join, @language).div
       end
@@ -98,6 +103,11 @@ module Zenweb
         partial = partial[1..-1]
       end
 
+      # be explicit about errors
+      context.exception_renderer = lambda do |exc|
+        exc.is_a?(Liquid::InternalError) ? "Liquid error: #{exc.cause.message}" : exc
+      end
+
       context.stack do
         html = CodeRay.scan(partial, @language).div
       end