feat(tvix/eval): Add a proc-macro for defining builtins r/5263

Add a single new proc macro to a new proc-macro crate,
`tvix-eval-proc-macros` for defining an inline module containing nix
builtins, and automatically generating a function within that module
which returns a list of those builtins as `tvix_eval::value::Builtin`.

Change-Id: Ie4afae438914d2af93d15637151a49b4c68aa352
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7198
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Tested-by: BuildkiteCI

1 files changed, 1 insertions, 0 deletions

diff --git a/tvix/eval/builtin-macros/.gitignore b/tvix/eval/builtin-macros/.gitignore
new file mode 100644
index 0000000000..eb5a316cbd
--- /dev/null
+++ b/tvix/eval/builtin-macros/.gitignore
@@ -0,0 +1 @@
+target