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Vincent Ambo 38fd3cb292 refactor(tvix/eval): insert storeDir "builtin" in eval startup 
Instead of using a suspended native thunk, calculate and optionally
insert the storeDir builtin when the VM is constructed.

We already have the IO handle available at this point and can just
check whether a storeDir is present, and insert its absolute value as
a builtin.

Change-Id: If966eee6ff26dc888b6e888e7c46170c0c346b05
Reviewed-on: https://cl.tvl.fyi/c/depot/+/8145
Reviewed-by: raitobezarius <tvl@lahfa.xyz>
Tested-by: BuildkiteCI
2023-03-04 15:53:36 +00:00
..
.vscode chore(tvix): fix vscode rust-analyzer recommendation 2022-10-15 16:54:28 +00:00
cli chore(tvix/cli): iter instead of into_iter for references 2023-02-16 22:42:14 +00:00
docs docs(tvix): fix minor spelling problems in pointer equality document 2023-01-25 14:30:50 +00:00
eval refactor(tvix/eval): insert storeDir "builtin" in eval startup 2023-03-04 15:53:36 +00:00
nix-compat feat(tvix/nix-compat/derivation): make use of NixPath in some places 2023-03-04 12:26:00 +00:00
nix_cli chore(tvix): upgrade to clap 4.0 2022-12-21 13:23:38 +00:00
proto chore(tvix/store): move castore.proto 2022-12-04 10:41:39 +00:00
serde refactor(tvix/serde): allow dead_code in struct 2023-01-31 15:35:46 +00:00
store refactor(tvix/store): remove needless borrow in build.rs 2023-02-15 18:40:36 +00:00
verify-lang-tests test(tvix/eval): add test for builtins parity 2023-01-06 12:00:38 +00:00
.gitignore feat(tvix/): .gitignore target folders 2022-11-11 19:55:12 +00:00
Cargo.lock fix(tvix/cli): use tvlfyi/wu-manber fork for refscanner 2023-02-04 12:44:59 +00:00
Cargo.nix fix(tvix/cli): use tvlfyi/wu-manber fork for refscanner 2023-02-04 12:44:59 +00:00
Cargo.toml refactor(tvix/nix-compat): absorb nar writer 2023-01-31 15:18:39 +00:00
crate-hashes.json fix(tvix/cli): use tvlfyi/wu-manber fork for refscanner 2023-02-04 12:44:59 +00:00
default.nix fix(tvix): add dummy target to attach extra-step to 2023-02-01 17:34:08 +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 docs(tvix): move mg shell command into one line 2023-02-03 12:07:07 +00:00

README.md

Tvix

Tvix is a new implementation of the Nix language and package manager. See the announcement post for information about the background of this project.

Tvix is developed by TVL in our monorepo, the depot, at //tvix. Code reviews take place on Gerrit, bugs are filed in our issue tracker.

For more information about Tvix, feel free to reach out. We are interested in people who would like to help us review designs, brainstorm and describe requirements that we may not yet have considered.

Most of the discussion around development happens on our IRC channel, which you can join in several ways documented on tvl.fyi, or on our mailing list.

Contributions to Tvix follow the TVL review flow and contribution guidelines.

WARNING: Tvix is not ready for use in production. None of our current APIs should be considered stable in any way.

WARNING: Any other instances of this project or repository are josh-mirrors. We do not accept code contributions or issues outside of the tooling and communication methods outlined above.

Components

This folder contains the following components:

  • //tvix/eval - an implementation of the Nix programming language
  • //tvix/nix-compat - library functions for compatibility with C++ Nix
  • //tvix/cli - preliminary REPL & CLI implementation for Tvix
  • //tvix/serde - Rust library for using the Nix language for app configuration
  • //tvix/store - implementation of a file store for Tvix

Some additional folders with auxiliary things exist and can be explored at your leisure.

Building the CLI

The CLI can also be built with standard Rust tooling (i.e. cargo build), as long as you are in a shell with the right dependencies.

  • If you cloned the full monorepo, it can be provided by mg shell //tvix:shell.
  • If you cloned the tvix workspace only (git clone https://code.tvl.fyi/depot.git:workspace=views/tvix.git), nix-shell provides it.

If you're in the TVL monorepo, you can also run mg build //tvix/cli (or mg build from inside that folder) for a more incremental build.

Please follow the depot-wide instructions on how to get mg and use the depot tooling.

Compatibility

Important note: We only use and test Nix builds of our software against Nix 2.3. There are a variety of bugs and subtle problems in newer Nix versions which we do not have the bandwidth to address, builds in newer Nix versions may or may not work.

Rust projects, crate2nix

Some parts of Tvix are written in Rust. To simplify the dependency management on the Nix side of these builds, we use crate2nix in a single Rust workspace in //tvix to maintain the Nix build configuration.

When making changes to Cargo dependency configuration in any of the Rust projects under //tvix, be sure to run mg run //tvix:crate2nixGenerate -- in //tvix itself and commit the changes to the generated Cargo.nix file. This only applies to the full TVL checkout.

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.