1 files changed, 24 insertions, 0 deletions

diff --git a/filters/strip-solutions.lua b/filters/strip-solutions.lua
new file mode 100644
index 0000000..2bba42f
--- /dev/null
+++ b/filters/strip-solutions.lua
@@ -0,0 +1,24 @@
+-- Pandoc filter which strips "solution" blocks when the environment variable
+-- "STRIP_SOLUTIONS" is set, or wrap them in a block quote otherwise.
+-- Useful to generate public and private handouts from the same source.
+--
+-- Author: Pacien TRAN-GIRARD
+-- Licence: EUPL-1.2
+
+strip_solutions = os.getenv('STRIP_SOLUTIONS')
+
+return {
+  {
+    Div = function(elem)
+      if elem.classes[1] == 'solution' then
+        if strip_solutions then
+          return pandoc.Null()
+        else
+          return pandoc.BlockQuote(elem.content)
+        end
+      else
+        return elem
+      end
+    end,
+  }
+}