7165ebc43b
The default behavior of string coercion in C++ Nix is to weakly coerce and import to store if necessary. There is a flag to make it strongly coerce (coerceMore) and a flag that controls whether path values have the corresponding file/directory imported into the store before returning the (store) path as a string (copyToStore). We need to implement our equivalent to the copyToStore (import_paths) flag for the benefit of weak coercions that don't import into the store (dirOf, baseNameOf, readFile, ...) and strong coercions that don't import into the store (toString). This makes coerce_to_string as well as CoercionKind weirder and more versatile, but prevents us from reimplementing parts of the coercion logic constantly as can be seen in the case of baseNameOf. Note that it is not possible to test this properly in //tvix/eval tests due to the lack of an appropriate EvalIO implementation being available. Tests should be added to //tvix/glue down the line. Change-Id: I8fb8ab99c7fe08e311d2ba1c36960746bf22f566 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10361 Autosubmit: sterni <sternenseemann@systemli.org> Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com> |
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| .. | ||
| .vscode | ||
| boot | ||
| build | ||
| build-go | ||
| castore | ||
| castore-go | ||
| cli | ||
| docs | ||
| eval | ||
| glue | ||
| nar-bridge | ||
| nix-compat | ||
| scripts | ||
| serde | ||
| store | ||
| store-go | ||
| tools | ||
| verify-lang-tests | ||
| website | ||
| .gitignore | ||
| buildkite.yml | ||
| Cargo.lock | ||
| Cargo.nix | ||
| Cargo.toml | ||
| clippy.toml | ||
| crate-hashes.json | ||
| default.nix | ||
| LICENSE | ||
| logo.webp | ||
| OWNERS | ||
| README.md | ||
| shell.nix | ||
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/castore- subtree storage/transfer in a content-addressed fashion//tvix/cli- preliminary REPL & CLI implementation for Tvix//tvix/eval- an implementation of the Nix programming language//tvix/nar-bridgenar-bridge-http: A HTTP webserver providing a Nix HTTP Binary Cache interface in front of a tvix-store
//tvix/nix-compat- a Rust library for compatibility with C++ Nix, features like encodings and hashing schemes and formats//tvix/serde- a Rust library for using the Nix language for app configuration//tvix/store- a "filesystem" linking Nix store paths and metadata with the content-addressed layer
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
tvixworkspace only (git clone https://code.tvl.fyi/depot.git:workspace=views/tvix.git),nix-shellprovides 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:crate2nix-generate 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.