scaffolding in place for properties.pdf

packages/squiggle-lang/.gitignore

@@ -19,3 +19,4 @@ yarn-error.log
 dist
 *.coverage
 _coverage
+result

packages/squiggle-lang/__tests__/docs/README.md

@@ -0,0 +1,15 @@
+# Properties
+
+Using `nix`. Where `o` is `open` on OSX and `xdg-open` on linux, 
+```sh
+nix-build
+o result/properties.pdf
+```
+Without `nix`, you can install `pandoc` yourself and run
+```sh
+pandoc --from markdown --to latex --out properties.pdf --pdf-engine xelatex properties.md
+```
+
+## _Details_
+
+The `properties.pdf` document is _normative and aspirational_. It does not document tests as they exist in the codebase, but somewhat represents how we think squiggle ought to be tested. 

packages/squiggle-lang/__tests__/docs/default.nix

@@ -0,0 +1,33 @@
+{ chan ? "a7ecde854aee5c4c7cd6177f54a99d2c1ff28a31"  # 21.11
+, pkgs ? import (builtins.fetchTarball { url = "https://github.com/NixOS/nixpkgs/archive/${chan}.tar.gz"; }) {}
+}:
+# Style sheets https://github.com/citation-style-language/styles/
+with pkgs;
+let deps = [
+#      (texlive.combine
+#        { inherit (texlive)
+#        scheme-small thmtools datetime xpatch fmtcount;
+#        }
+#      )
+      haskellPackages.pandoc
+    ];
+in
+  stdenv.mkDerivation {
+    name = "render_squiggle_properties";
+    src = ./.;
+    buildInputs = deps;
+    buildPhase = ''
+      echo rendering...
+      pandoc \
+             --from markdown \
+             --to latex \
+             --out properties.pdf \
+             --pdf-engine xelatex \
+             properties.md \
+      echo rendered.
+    '';
+    installPhase = ''
+      mkdir -p $out
+      cp properties.pdf $out/properties.pdf
+      '';
+  }