1 files changed, 21 insertions, 0 deletions
diff --git a/nix/renderMarkdown/default.nix b/nix/renderMarkdown/default.nix
new file mode 100644
index 000000000000..8759ada0fe3b
--- /dev/null
+++ b/nix/renderMarkdown/default.nix
@@ -0,0 +1,21 @@
+# Render a Markdown file to HTML.
+{ depot, pkgs, ... }:
+
+with depot.nix.yants;
+
+let
+  args = struct "args" {
+    path = path;
+    tagfilter = option bool;
+  };
+in
+defun [ (either path args) drv ]
+  (arg: pkgs.runCommand "${arg.path or arg}.rendered.html" { }
+    (
+      let
+        tagfilter = if (arg.tagfilter or true) then "" else "--no-tagfilter";
+      in
+      ''
+        cat ${arg.path or arg} | ${depot.tools.cheddar}/bin/cheddar --about-filter ${tagfilter} ${arg.path or arg} > $out
+      ''
+    ))