1 files changed, 18 insertions, 0 deletions
diff --git a/_plugins/linter.rb b/_plugins/linter.rb
index 919a8bb..8078dae 100644
--- a/_plugins/linter.rb
+++ b/_plugins/linter.rb
@@ -192,11 +192,29 @@ module Jekyll
       end
     end
 
+    def assert_lilypond(site)
+      site.config['musics'].each do |music|
+        assert music['title'], "Missing 'title' in #{music}"
+        assert music['composer'], "Missing 'composer' in #{music}"
+        ref = assert music['ref'], "Missing 'ref' in #{music}"
+        ly = "music/#{ref}.ly"
+        unless File.exist? ly then
+          raise "Missing '#{ly}' file present in _config.yml."
+        end
+
+        point_and_click_off = open(ly) { |f| f.include? "\\pointAndClickOff\n" }
+        unless point_and_click_off then
+          raise "Missing '\\pointAndClickOff' in '#{ly}'"
+        end
+      end
+    end
+
     def generate(site)
       assert_unique_ids(site)
       assert_frontmatter(site)
       assert_media_metadata(site)
       assert_git_annex(site)
+      assert_lilypond(site)
     end
 
     def all_documents(site)