set `LiquidError#template_name` for errors in included file (#6206)

Merge pull request 6206

features/rendering.feature

@@ -12,14 +12,23 @@ Feature: Rendering
     Then  I should get a non-zero exit-status
     And   I should see "Liquid Exception" in the build output
 
-  Scenario: When receiving bad Liquid in included file
+  Scenario: When receiving a liquid syntax error in included file
     Given I have a _includes directory
     And   I have a "_includes/invalid.html" file that contains "{% INVALID %}"
     And   I have a "index.html" page with layout "simple" that contains "{% include invalid.html %}"
     And   I have a simple layout that contains "{{ content }}"
     When  I run jekyll build
     Then  I should get a non-zero exit-status
-    And   I should see "Liquid Exception.*Unknown tag 'INVALID' in.*_includes/invalid\.html" in the build output
+    And   I should see "Liquid Exception: Liquid syntax error \(.+/invalid\.html line 1\): Unknown tag 'INVALID' included in index\.html" in the build output
+
+  Scenario: When receiving a generic liquid error in included file
+    Given I have a _includes directory
+    And   I have a "_includes/invalid.html" file that contains "{{ site.title | prepend 'Prepended Text' }}"
+    And   I have a "index.html" page with layout "simple" that contains "{% include invalid.html %}"
+    And   I have a simple layout that contains "{{ content }}"
+    When  I run jekyll build
+    Then  I should get a non-zero exit-status
+    And   I should see "Liquid Exception: Liquid error \(.+/_includes/invalid\.html line 1\): wrong number of arguments (\(given 1, expected 2\)|\(1 for 2\)) included in index\.html" in the build output
 
   Scenario: Render Liquid and place in layout
     Given I have a "index.html" page with layout "simple" that contains "Hi there, Jekyll {{ jekyll.environment }}!"

lib/jekyll/liquid_renderer.rb

@@ -43,9 +43,6 @@ module Jekyll
     end
 
     def self.format_error(e, path)
-      if e.is_a? Tags::IncludeTagError
-        return "#{e.message} in #{e.path}, included in #{path}"
-      end
       "#{e.message} in #{path}"
     end
   end

lib/jekyll/tags/include.rb

@@ -136,7 +136,13 @@ eos
 
         context.stack do
           context["include"] = parse_params(context) if @params
-          partial.render!(context)
+          begin
+            partial.render!(context)
+          rescue Liquid::Error => e
+            e.template_name = path
+            e.markup_context = "included " if e.markup_context.nil?
+            raise e
+          end
         end
       end
 
@@ -161,8 +167,10 @@ eos
             .file(path)
           begin
             cached_partial[path] = unparsed_file.parse(read_file(path, context))
-          rescue Liquid::SyntaxError => ex
+          rescue Liquid::Error => e
-            raise IncludeTagError.new(ex.message, path)
+            e.template_name = path
+            e.markup_context = "included " if e.markup_context.nil?
+            raise e
           end
         end
       end