tvl-depot/tvix
sterni 4dcb8f38c2 fix(tvix/eval): resolve home relative paths at runtime
Home relative paths depend on the environment to be resolved. We have
elected to do everything that depends on the environment, e.g. resolving
SPATH expressions using NIX_PATH, at runtime, so tvix evaluation would
continue to behave correctly even if we separated the compilation and
execution phases more, e.g. via serializing bytecode. Then the value of
HOME, NIX_PATH etc. could reasonably change in the time until execution,
yielding wrong results if the resolution results were cached in the
bytecode.

We also take the opportunity to fix the broken path concatenation
previously found in the compiler, fixing b/205.

Another thing we could consider is emitting a warning for home relative
path literals, as they are by nature relatively fragile.

One sideeffect of this change is that home path resolution errors
become catchable which is not the case in C++ Nix. This will need to be
fixed up in a subsequent change.

Change-Id: I30bd69b575667c49170a9fdea23a020565d0f9ec
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7024
Autosubmit: sterni <sternenseemann@systemli.org>
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Tested-by: BuildkiteCI
2022-10-16 19:11:23 +00:00
..
.vscode chore(tvix): fix vscode rust-analyzer recommendation 2022-10-15 16:54:28 +00:00
docs docs(tvix): Update components.md 2022-09-16 11:55:57 +00:00
eval fix(tvix/eval): resolve home relative paths at runtime 2022-10-16 19:11:23 +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.