tvl-depot/tvix
Vincent Ambo b530e496a5 feat(tvix/eval): initial implementation of builtins.import
This adds an initial working version of builtins.import which
encapsulates the entire functionality of `import` within the builtin
itself, without requiring any changes in the compiler or VM.

The key insight that enables this is that we can simply return a Thunk
from `import` that is constructed from the output of running the
compiler and - ta-da! - no other component needs to know about it.

A couple of notes:

* builtins.import needs to capture variables like the SourceCode
  structure. This means it can not currently be constructed the same
  way as other builtins and has special handling, which leaks out to
  `eval.rs`. I have postponed dealing with that until we have this
  working a bit more.

* the `globals` are not yet passed through

* the error representation for the new variants is absolutely not done
  yet, we probably want to switch to something that supports
  cause-chaining now (like miette)

* there is no mechanism for emitting warnings at runtime; we need to
  add that

Change-Id: I3117a7ae3ff2432bf44f5ff05ad35f47faca31d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6857
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: wpcarro <wpcarro@gmail.com>
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-10-06 15:22:32 +00:00
..
.vscode feat(tvix): set up cargo rust project 2022-01-06 15:38:52 +00:00
docs docs(tvix): Update components.md 2022-09-16 11:55:57 +00:00
eval feat(tvix/eval): initial implementation of builtins.import 2022-10-06 15:22:32 +00:00
nix_cli chore(tvix/nix_cli): build with tests 2022-09-11 14:31:10 +00:00
proto chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
.gitignore feat(tvix): set up cargo rust project 2022-01-06 15:38:52 +00:00
LICENSE chore(tvix): Bootstrap Tvix folder 2021-03-27 00:09:49 +00:00
OWNERS chore(gerrit): migrate OWNERS files to code-owners style 2022-09-19 11:13:28 +00:00
README.md chore(tvix): Bootstrap Tvix folder 2021-03-27 00:09:49 +00:00

Tvix

For more information about Tvix, contact one of the project owners. We are interested in people who would like to help us review designs, brainstorm and describe requirements that we may not yet have considered.

License structure

All code implemented for Tvix is licensed under the GPL-3.0, with the exception of the protocol buffer definitions used for communication between services which are available under a more permissive license (MIT).

The idea behind this structure is that any direct usage of our code (e.g. linking to it, embedding the evaluator, etc.) will fall under the terms of the GPL3, but users are free to implement their own components speaking these protocols under the terms of the MIT license.