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Vincent Ambo da1e3e9ac5 feat(tvix/eval): implement nested keys 
This finishes up the implementation of nested keys after the key
insight that the nesting level does not need to be tracked, and
instead the attribute iterator can simply be retained inside the
structures as is (in an advanced state).

With this implementation, when encountering a nested key, the Tvix
compiler will first analyse whether there is already a matching
binding that can be merged (i.e. a binding that is a literal attribute
set), and perform the merge, or otherwise create a new recursive set
of bindings in which the entry is inserted with the path iterator
advanced beyond the first name component.

With this, all the logic simply applies recursively until there are no
more nested bindings (i.e. until all iterators are "empty").

Note that this has one (potentially insignificant) deviation from Nix
currently: If a non-mergable value is supplied (e.g. `a.b = 1; a =
2;`), Tvix will emit a *runtime* error (whereas it is *parse* time in
Nix) as the branch which could statically analyse this is currently
unreachable. There's a TODO for this, so we can fix it up later.

Change-Id: I53df70e09614ff4281a70b80eac7da3beca12da9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/6806
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-09-30 12:31:14 +00:00
.gcroots feat(.envrc): gcroot third_party.sources 2022-09-15 11:27:53 +00:00
.nixery feat(ops/modules): Add module for running Nixery 2021-08-12 14:55:59 +00:00
corp chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
docs docs(CONTRIBUTING): Mention new subtree commit type 2021-11-30 22:42:34 +00:00
fun chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
lisp chore(gerrit): migrate OWNERS files to code-owners style 2022-09-19 11:13:28 +00:00
net chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
nix chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
ops chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
third_party chore(3p/sources): Bump channels & overlays 2022-09-29 08:24:50 +00:00
tools chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
tvix feat(tvix/eval): implement nested keys 2022-09-30 12:31:14 +00:00
users chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
views feat(tvl-kit): Expose //tools/checks in tvl-kit 2022-06-07 09:40:06 +00:00
web chore(3p/sources): Bump channels & overlays 2022-09-28 08:02:31 +00:00
.envrc feat(.envrc): gcroot third_party.sources 2022-09-15 11:27:53 +00:00
.git-blame-ignore-revs fix: add cl/4397 (treewide nixpkgs-fmt) to git-blame-ignore-revs 2022-02-07 18:15:09 +00:00
.gitignore feat(.envrc): gcroot third_party.sources 2022-09-15 11:27:53 +00:00
.hgignore chore(hgignore): ignore .git for hg 2020-06-14 18:23:13 +00:00
.mailmap chore(mailmap): add my name to mailmap 2020-07-18 18:15:05 +00:00
.rgignore chore: Only exclude //third_party/git from ripgrep 2020-05-17 23:58:22 +01:00
buf.yaml feat(buf.yaml): add protobuf linter config 2020-07-17 20:01:29 +00:00
default.nix feat: Add top-level system parameter 2022-06-03 23:27:03 +00:00
LICENSE docs(readTree): Add SPDX license header on readTree 2021-04-12 13:56:44 +00:00
OWNERS chore(gerrit): migrate OWNERS files to code-owners style 2022-09-19 11:13:28 +00:00
README.md docs(README.md): reflect recent upheaval in depot 2022-05-27 23:24:28 +00:00
RULES feat(whitby): Let sterni bear the wheel 2021-05-23 19:06:15 +00:00
rustfmt.toml feat(depotfmt): Check & format Rust code with rustfmt 2022-02-08 12:06:39 +00:00

README.md

depot

Build status

This repository is the monorepo for the community around The Virus Lounge, containing our personal tools and infrastructure. Everything in here is built using Nix.

A large portion of the software here is very self-referential, meaning that it exists to sustain the operation of the repository. This is the case because we partially see this as an experiment in tooling for monorepos.

Highlights

Services

  • Source code is available primarily through Sourcegraph on cs.tvl.fyi, where it is searchable and even semantically indexed. A lower-tech view of the repository is also available via cgit-pink on code.tvl.fyi.

    The repository can be cloned using git from https://cl.tvl.fyi/depot.

  • All code in the depot, with the exception of code that is checked in to individual //users folders, needs to be reviewed. We use Gerrit on cl.tvl.fyi for this.

  • Issues are tracked via our own issue tracker on b.tvl.fyi. Its source code lives at //web/panettone/.

  • Smaller todo-list entries which do not warrant a separate issue are listed at todo.tvl.fyi.

  • We use Buildkite for CI. Recent builds are listed on tvl.fyi/builds and pipelines are configured dynamically via //ops/pipelines.

  • A search service that makes TVL services available via textual shortcuts is available: atward

All services that we host are deployed on NixOS machines that we manage. Their configuration is tracked in //ops/{modules,machines}.

Nix

  • //nix/readTree contains the Nix code which automatically registers projects in our Nix attribute hierarchy based on their in-tree location
  • //tools/nixery contains the source code of Nixery, a container registry that can build images ad-hoc from Nix packages
  • //nix/yants contains Yet Another Nix Type System, which we use for a variety of things throughout the repository
  • //nix/buildGo implements a Nix library that can build Go software in the style of Bazel's rules_go. Go programs in this repository are built using this library.
  • //nix/buildLisp implements a Nix library that can build Common Lisp software. Currently only SBCL is supported. Lisp programs in this repository are built using this library.
  • //web/blog and //web/atom-feed: A Nix-based static site generator which generates the web page and Atom feed for tazj.in (//users/tazjin/homepage) and tvl.fyi (//web/tvl)
  • //web/bubblegum contains a CGI-based web framework written in Nix.
  • //nix/nint: A shebang-compatible interpreter wrapper for Nix.
  • //tvix contains initial work towards a modular architecture for Nix.

We have a variety of other tools and libraries in the //nix folder which may be of interest.

Packages / Libraries

  • //net/alcoholic_jwt contains an easy-to-use JWT-validation library for Rust
  • //net/crimp contains a high-level HTTP client using cURL for Rust
  • //tools/emacs-pkgs contains various useful Emacs libraries, for example:
    • dottime.el provides dottime in the Emacs modeline
    • nix-util.el provides editing utilities for Nix files
    • term-switcher.el is an ivy-function for switching between vterm buffers
    • tvl.el provides helper functions for interacting with the TVL monorepo
  • //lisp/klatre provides a grab-bag utility library for Common Lisp

User packages

Contributors to the repository have user directories under //users, which can be used for personal or experimental code that does not require review.

Some examples:

  • //users/grfn/xanthous: A (WIP) TUI RPG, written in Haskell.
  • //users/tazjin/emacs: tazjin's Emacs & EXWM configuration
  • //users/tazjin/finito: A persistent finite-state machine library for Rust.

Licensing

Unless otherwise stated in a subdirectory, all code is licensed under the MIT license. See LICENSE for details.

Contributing

If you'd like to contribute to any of the tools in here, please check out the contribution guidelines and our code of conduct.

IRC users can find us in #tvl on hackint, which is also reachable via XMPP at #tvl@irc.hackint.org (sic!).

Hackint also provide a web chat.