WIP: postprocessing pipeline

Now each run is executed in a independent folder

garlic/pp/rplot.nix

@@ -0,0 +1,33 @@
+{
+  stdenv
+, rWrapper
+, rPackages
+}:
+
+{
+# The two results to be compared
+  dataset
+, script
+, extraRPackages ? []
+}:
+
+with stdenv.lib;
+
+let
+  customR = rWrapper.override {
+    packages = with rPackages; [ tidyverse ] ++ extraRPackages;
+  };
+
+in stdenv.mkDerivation {
+  name = "plot";
+  buildInputs = [ customR ];
+  preferLocalBuild = true;
+  dontPatchShebangs = true;
+  phases = [ "installPhase" ];
+
+  installPhase = ''
+    mkdir -p $out
+    cd $out
+    Rscript --vanilla ${script} ${dataset}
+  '';
+}