Add root-env

This makes images smaller without needing to make sure
that no references to the root environment occur in the final
image.

CHANGELOG.md

@@ -31,6 +31,7 @@ All notable changes to this project will be documented in this file.
 - Add `comptime` macro for compile time evaluation.
 - Run `main` functions in scripts if they exist, just like jpm standalone binaries.
 - Add `protect` macro.
+- Add `root-env` to get the root environment table.
 - Change marshalling protocol with regard to abstract types.
 - Numerous small bug fixes and usability improvements.
 

src/boot/boot.janet

@@ -2271,11 +2271,14 @@
 ###
 ###
 
+(def root-env "The root environment used to create envionments with (make-env)" _env)
+
 (do
   (put _env 'boot/opts nil)
   (put _env '_env nil)
-  (merge-into load-image-dict (env-lookup _env))
-  (merge-into make-image-dict (invert load-image-dict)))
+  (def load-dict (env-lookup _env))
+  (merge-into load-image-dict load-dict)
+  (merge-into make-image-dict (invert load-dict)))
 
 ###
 ###