I think I may have figured it out

site.moon

@@ -1,6 +1,7 @@
 sitegen = require "sitegen"
 Site = require "sitegen.site"
 Path = require "sitegen.path"
+PygmentsPlugin = require "sitegen.plugins.pygments"
 html = require "sitegen.html"
 common = require "sitegen.common"
 cosmo = require "sitegen.cosmo"
@@ -13,17 +14,40 @@ import p from require "moon" -- debug
 -- Change output dir to what Openresty prefers
 Site.config.out_dir = "html/"
 
+-- PygmentsPlugin.highlight = (lang, code) =>
+--   fname = os.tmpname!
+--   with io.open fname, "w"
+--     \write code
+--     \close!
+--
+--   p lang
+--
+--   -- p = io.popen ("pygmentize -f html -l %s %s")\format lang, fname
+--   p = io.popen ("pygmentize -f html -l moonscript.py %s -x")\format fname
+--   out = p\read"*a"
+--
+--   -- get rid of the div and pre inserted by pygments
+--   assert out\match('^<div class="highlight"><pre>(.-)\n?</pre></div>'),
+--     "Failed to parse pygmentize result, is pygments installed?"
+
+
+
 -- Configure the command our custom renderer uses to convert markdown to html
 rend = "renderers.markdown"
-require(rend).cmd = "pandoc --mathjax >"
+-- require(rend).cmd = "pandoc --mathjax --no-highlight >"
 -- require(rend).cmd = "pandoc --mathjax -f json >"
 
+-- require(rend).cmd = "pandoc --mathjax --no-highlight --lua-filter ./pygments.lua >"
+
 -- Insert custom renderer in the first position so it will be preferred
--- table.insert Site.default_renderers, 1, rend
+table.insert Site.default_renderers, 1, rend
 
 -- Remove "pygments" plugin because it conflicts with pandoc syntax highlighting
--- Site.default_plugins = for v in *Site.default_plugins
---   if v\find "pygments" then continue else v
+Site.default_plugins = for v in *Site.default_plugins
+  if v\find "pygments" then continue else v
+
+-- plugin = "plugins.pygments"
+-- table.insert Site.default_plugins, 1, plugin
 
 -- from https://github.com/leafo/sitegen/blob/v0.2/spec/sitegen_spec.moon#L9-L18
 get_files = (path, prefix=path) ->
@@ -118,8 +142,8 @@ sitegen.create =>
     } for path in *files
 
   add "index.html", title: "Catalin Mititiuc"
-  -- add "blog.html", title: "Posts", target: "posts/index", template: "blog"
-  -- add_all files_from "docs"
+  add "blog.html", title: "Posts", target: "posts/index", template: "blog"
+  add_all files_from "docs"
 
   -- replace post markdown yaml headers with moonscript headers
   filter "docs", (body) =>
@@ -128,6 +152,7 @@ sitegen.create =>
       moonscript_header = header\gsub "%.%.%.", "}"
       moonscript_header
 
+  copy "moonscript.py"
+  copy "pygments.lua"
   copy "app.css"
-  -- copy "pygments.css"
   copy "moonscript.css"