Commit graph

810 commits

Author SHA1 Message Date
Ryan Lahfa
4cda236c0c feat(tvix/eval): implement From<f64> for Value
Change-Id: I287282a195d6f752260242739332b2357791974a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7625
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2022-12-25 15:47:40 +00:00
Vincent Ambo
712f1167ad feat(tvix/eval): display function names in documentation
... if they are known. We currently do not propagate names correctly
for curried functions.

Change-Id: I19d57fb30a5c0000ccdf690b91076f6b2191de23
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7596
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-22 19:09:40 +00:00
Vincent Ambo
e3f81e8d3b feat(tvix/cli): add :d REPL-prefix to print explanations of values
Change-Id: I1dd8de8d996e07840f9b0aaebf932b812103a43a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7593
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-22 19:09:40 +00:00
Vincent Ambo
e306d1d1a1 feat(tvix/eval): add Value::explain method
This value creates a human-readable explanation of a value. This can
be used to implement documentation related functionality.

For some values, the amount of information displayed can be expanded
quite a bit.

Change-Id: Ie8c400feae909e7680af163596f99060262e4241
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7592
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-22 19:09:40 +00:00
Vincent Ambo
ea7d63e177 feat(tvix/cli): implement NixCompatIO helper type
This type allows for temporarily compatibility with the C++ Nix store,
specifically (for now) it gives us the store directory used by Nix and
imports files the same way.

Change-Id: I4767794ef2863eba49661315c63c4e17de946d60
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7587
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-22 19:09:40 +00:00
Florian Klink
40a17acdc1 feat(tvix): add crate2nixGenerate target
`mg run //tvix:crate2nixGenerate --` runs crate2nix generate and
depotfmt's it afterwards.

This removes a frequent point of friction, because the Cargo.nix emitted
by crate2nix needs another formatter.

Change-Id: I649495980718cd3847d4cff77c9d4bfcb599387c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7612
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-22 15:26:41 +00:00
Florian Klink
2e04f68df8 feat(tvix/proto): add rpc_directory.proto
This provides an interface to retrieve and upload single Directory
messages, or a DAG of them.

Change-Id: Id9e7084bd697d843649a122da2c992a3e36d808c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7137
Tested-by: BuildkiteCI
Reviewed-by: Adam Joseph <adam@westernsemico.com>
2022-12-22 14:35:32 +00:00
Florian Klink
870cd533dd feat(tvix/proto): add rpc_pathinfo
This defines a service that can be used to upload and retrieve metadata
of nix paths.

Change-Id: Id86eb531ce4ae316adb15934b0d1386a14ba2132
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7136
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: Adam Joseph <adam@westernsemico.com>
2022-12-22 14:35:32 +00:00
Vincent Ambo
22ed59fabd chore(tvix/eval): fix a broken comment
Change-Id: I0a6edb51685f94d4712089ae805170da3fb7faae
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7609
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-21 23:29:26 +00:00
Vincent Ambo
908cebf35c fix(tvix/builtin-macros): parse multi-line docstrings correctly
Having a multi-line docstring yields multiple doc-attributes in order,
however we were previously discarding all but the first one.

This reduces them into a single string instead, which can then be
displayed as multi-line documentation.

Change-Id: I1f237956cdea2e4c746d3f13744e0373c1c645a6
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7594
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-21 23:05:22 +00:00
Vincent Ambo
270b1084e8 feat(tvix/eval): use EvalIO::import_path when coercing paths
This "ties the knot" of importing files into a store when referring
to them through path literals, e.g. inside of strings.

I'm not yet sure if this interface is sufficient for
builtins.path (which we haven't implemented at all yet), but it's
enough to wire up eval & store initially.

In the default implementations nothing interesting happens in this
function at all.

Change-Id: Ie01ff4161617d1e743a68dbd1a5e54c1b40c0990
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7582
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:59:18 +00:00
Vincent Ambo
edd13573f5 refactor(tvix/eval): use light spans in builtins.import
Change-Id: I05732073155b430575babb6f076bf465aef98857
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7581
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 22:59:18 +00:00
Adam Joseph
947a56c4b6 feat(tvix/eval): builtins.storeDir
Returns the store directory through EvalIO::store_dir.

Note that this is _optional_ in Tvix, as an evaluation can occur in a
context where there simply is no store directory. In those contexts,
`builtins.storeDir` returns `null` in Tvix.

This would only happen in contexts like Tvixbolt (or completely
unrelated use-cases) in practice.

Co-Authored-By: Vincent Ambo <tazjin@tvl.su>
Change-Id: I5a752c7e89b2f75bd7efb082dbfa5b25e3b1ff3b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7452
Autosubmit: Adam Joseph <adam@westernsemico.com>
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 22:59:18 +00:00
Vincent Ambo
4cb9ada0df refactor(tvix/eval): use EvalIO::read_dir for equivalent builtin
Change-Id: I6d782c07166f51587d2f1d06607823268debb5d5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7574
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:59:18 +00:00
Vincent Ambo
51deadd983 refactor(tvix/eval): use EvalIO::path_exists for the builtin
Change-Id: I49822ce30137777865e7370ee86666636e277b35
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7573
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 22:53:02 +00:00
Vincent Ambo
ec3e38c2d6 chore(tvix/eval): gate tvix_eval::StdIO behind the impure feature
This shouldn't be available if we've built a "pure" crate.

Change-Id: I7c85827ee212890252ff7e0b6242e2c52618cba5
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7572
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 22:53:02 +00:00
Vincent Ambo
29790147b6 fix(tvix/cli): use tvix_eval::StdIO in CLI
... until we have a store-I/O layer, or something that intercepts the
store-related stuff appropriately.

Change-Id: I22f63435b3f9e118e3faeb2924fda8373a23ea7f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7568
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:37:11 +00:00
Vincent Ambo
0ef3c2fc2b refactor(tvix/eval): use EvalIO::read_to_string in impure builtins
With this change, the behaviour of reading a string from a file path
is controlled by the provided `EvalIO` structure.

This is a huge step towards abstracting away I/O behaviour correctly.

Change-Id: Ifde8e46cd863b16e0301dca45a434ad27560399f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7567
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 22:37:11 +00:00
Vincent Ambo
c3c4d752c9 feat(tvix/eval): add EvalIO to public crate API
This lets users set the `io_handle` field on an `Evaluation`, which is
then propagated to the VM.

Change-Id: I616d7140724fb2b4db47c2ebf95451d5303a487a
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7566
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:37:11 +00:00
Vincent Ambo
25fc6b7c25 feat(tvix/eval): introduce initial EvalIO trait
This trait is going to be used to abstract filesystem interactions in
Tvix.

For now, it only contains a `read_to_string` method that closely
mirrors `std::fs::read_to_string`.

As a first step, to see how this works in practice, we will thread
through only this function to the various relevant parts.

Two implementations are provided in tvix-eval itself: A dummy
implementation (which just returns ErrorKind::NotImplemented for all
operations), and a std implementation which delegates to `std`
functions.

Change-Id: Ied3e3bf4bd0e874dd84e166190e3873a0f923ddb
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7565
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:37:11 +00:00
Vincent Ambo
bf286a54bc refactor(tvix/eval): add a LightSpan type for lighter span tracking
This type carries the information required for calculating a
span (i.e. the chunk and offset), instead of the span itself. The span
is then only calculated in cases where it is required (when throwing
errors).

This reduces the eval time for
`builtins.length (builtins.attrNames (import <nixpkgs> {}))` by *one
third*!

The data structure in chunks that carries span information reduces
in-memory size by trading off the speed of retrieving span
information. This is because the span information is only actually
required when throwing errors (or emitting warnings).

However, somewhere along the way we grew a dependency on carrying span
information in thunks (for correctly reporting error chains). Hitting
the code paths for span retrieval was expensive, and carrying the
spans in a different way would still be less cache-efficient. This
change is the best tradeoff I could come up with.

Refs: b/229.
Change-Id: I27d4c4b5c5f9be90ac47f2db61941e123a78a77b
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7558
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 22:21:25 +00:00
Vincent Ambo
8b3d03db92 chore(tvix/cli): rename binary to just 'tvix'
Change-Id: If735c81a04f60dcd77f1c40b595b52ed88bbbe95
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7580
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
Reviewed-by: flokli <flokli@flokli.de>
2022-12-21 21:48:08 +00:00
Adam Joseph
da7c331d2c feat(tvix/eval): add thunks with suspended native Rust code
Having thunks which, when forced, execute native Rust code rather
than interpreted opcodes lets us avoid having to bundle
`src/libexpr/primops/derivation.nix` like cppnix does by implementing
it in Rust instead.

Change-Id: If91d77a6736234321eee87ba4b4777eed5a3fe1c
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7450
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 21:48:08 +00:00
Vincent Ambo
87995ed355 refactor(tvix/eval): add name-based index over compiler's locals
Instead of finding locals by doing 2x O(n) walks over the compiler's
locals list, use a secondary name-based index for resolving locals by
name.

Previously, almost 60% (!!) of eval time on some expressions over
nixpkgs was spent in `Local::has_name`. This function doesn't even
exist anymore now, and eval speed about doubles as a result.

Note that this doesn't exactly make the locals code easier to read,
but I'm also not sure what we can simplify in there in general.

This fixes b/227.

Change-Id: I29ce5eb9452b02d3b358c673e1f5cf8082e2fef9
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7560
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 21:48:08 +00:00
Adam Joseph
922bf7aca9 feat(tvix/eval): remove derive(Copy) from Upvalues
Change-Id: I0fa069fbeff6718a765ece948c2c1bce285496f7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7449
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 14:50:04 +00:00
Adam Joseph
e04b1697e4 feat(tvix/eval): wrap Closure in Rc<> to match cppnix semantics
Change-Id: I595087eff943d38a9fc78a83d37e207bb2ab79bc
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7443
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 14:50:04 +00:00
Vincent Ambo
b3c34c3c61 docs(tvix/nar): document how to use NAR writer
This is done in the form of some comments on the functions, as well as
a functional doctest that writes a single file to a NAR.

Change-Id: Ic97ebd439e91d6b076685807fe70de098ec02575
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7599
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2022-12-21 14:31:54 +00:00
Vincent Ambo
a95dea719f chore(tvix/nar): add CI build target
Change-Id: Ic73a391da9a733cade26114ab1127907c8d62a57
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7598
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-21 14:08:30 +00:00
Vincent Ambo
f467df06dc chore(tvix/cli): re-add observer flags
Users can again pass flags for dumping the AST, bytecode, and runtime
trace.

With this commit the CLI is at feature-parity with what we had before,
but entirely through the new API.

Change-Id: I30fe26f243224b25d1e4f828fec607325ef88306
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7550
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 13:23:38 +00:00
Vincent Ambo
60d9fba56d chore(tvix/cli): re-add NIX_PATH handling
Change-Id: I5595d6f5141ed4a533ca44a46264dc604fca6be1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7549
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 13:23:38 +00:00
Vincent Ambo
36eaa9b3b3 chore(tvix/cli): re-add --raw argument
Change-Id: I82f469f7f186c754c40bd941587b30aa3fc48045
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7548
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 13:23:38 +00:00
Vincent Ambo
6d3d237923 refactor(tvix/eval): consume self in Evaluation::evaluate
This simplifies lifetime management for observers in callers of tvix_eval.

Change-Id: I2f47c8d89f22b1c766526e5d1483c0d026b500ae
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7546
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 13:23:38 +00:00
Vincent Ambo
59e695a9d9 feat(tvix/eval): add observer configuration to public API
With this change, it should be possible to have both existing
use-cases (CLI & Tvixbolt) use the same API.

Change-Id: I2195264f08cc892177b559a28660dc5f98e48e41
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7545
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 13:23:38 +00:00
Vincent Ambo
9bc1e6ef05 feat(tvix/eval): add configuration of Nix search path to public API
This is required for passing through NIX_PATH from the CLI.

Change-Id: If129df79ef9c3ffab31408adb85679909276c4f0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7544
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-21 13:23:38 +00:00
Vincent Ambo
9d6ee5b6a6 fix(tvix/eval): use test-generator fork that supports workspaces
This should make no difference in Nix builds, but allows running tests
locally again with `cargo test` for //tvix/eval.

Change-Id: I97d61840143d5c14db61d5862781bf635f9a28e7
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7590
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
Reviewed-by: flokli <flokli@flokli.de>
2022-12-21 13:23:38 +00:00
Vincent Ambo
257c67f204 chore(tvix): upgrade to clap 4.0
In //tvix/eval:

* criterion bumped to 4.0, which at least depends on clap 3.x instead
  of 2.x, which is less incompatible

In //tvix/cli:

* no changes required

In //tvix/nix_cli:

* some minor changes for compatibility with clap 4.0, no functionality
  changes

Change-Id: If793f64b59fcaa2402d3d483ddbab4092f32df03
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7588
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 13:23:38 +00:00
Vincent Ambo
d9e2bec953 refactor(tvix): split binary (REPL etc.) out from evaluator library
The tvix-eval project is independent from any *uses* of the evaluator,
such as the tvix-repl.

This functionality has been split out into a separate "tvix-cli"
crate. Note that this doesn't have to mean that this CLI crate is the
"final" CLI crate for tvix, the point of this is not "getting the CLI
structure right" but rather "getting the evaluator structure right".

This reshuffling is part of restructuring the way that functionality
like store communication is injected into language evaluation.

Note that at this commit the new CLI crate is not at feature-parity.

Change-Id: Id0af03dc8e07ef09a9f882a89612ad555eca8f93
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7541
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: grfn <grfn@gws.fyi>
Tested-by: BuildkiteCI
2022-12-21 13:09:29 +00:00
Vincent Ambo
1138fbcaad refactor(tvix/eval): use new public API in test code
This removes internal uses of the previous crate::eval module, which
is being removed.

Change-Id: I5fb3c53460a9c5381853d0258f9ed074ab23c630
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7543
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: grfn <grfn@gws.fyi>
2022-12-21 13:09:28 +00:00
Vincent Ambo
d101151fc5 feat(tvix/eval): begin introducing new public API
A step towards something more like how I imagine the future public API
for tvix-eval. Please note that this is definitely not the final
version yet, but it's better than the previous API that either exposed
a side-effecting blackbox, or a very low-level "interface".

The basic idea is that an evaluation of some Nix code is requested by
a caller with various parameters, but not all callers are interested
in all of these parameters.

There are also some bits of information that are returned from an
evaluation that are not necessarily relevant to all callers.

To support this somewhat ergonomically, the API is built around an
`Evaluation` struct that is configured by the caller with the various
parameters and then "executed".

Change-Id: I71826f3897126898adc2873d31c44d3eaf5c2be0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7542
Reviewed-by: grfn <grfn@gws.fyi>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-21 13:09:27 +00:00
edef
15e98314cc feat(tvix/nar): init writer
Change-Id: I101f35840cb14c58af708c91e59f997f6d167f75
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7505
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
2022-12-20 15:59:44 +00:00
Florian Klink
5f9796cf94 feat(tvix/proto): add rpc_blobstore
This defines a service that can be used to get and put content-addressed
chunks of data.

Change-Id: I36cf2278ed1daf71848c04fdfd14450b2268c5de
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7135
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
2022-12-15 19:10:26 +00:00
Vincent Ambo
64f812b2f0 refactor(tvix): provide a combined //tvix:shell mkShell target
Manually maintained shell target based on the previous "loose"
`shell.nix` file.

We might want to have a function that combines the dependencies of all
the targets automatically, but at a quick glance that was actually
non-trivial so I'm leaving it as an exercise for someone else.

Change-Id: I74754940088f1b58e3b6754fb782470c80ea4292
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7540
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
2022-12-15 17:26:45 +00:00
Vincent Ambo
3aca3d3bba refactor(tvix): build Rust projects using crate2nix
Introduces granular dependency builds using crate2nix, bootstrapped
off the generated configuration from the newly introduced
workspace (see cl/7533).

This commit checks in the generated Cargo.nix file which can be
regenerated with a parameterless invocation of `crate2nix generate` in
`//tvix`. I tried generating this in IFD, but it turned out to be
harder than what seemed worthwhile for now.

In this setup, the various build targets for Rust projects end up
being attributes of the imported `Cargo.nix` file at the `tvix.crates`
attribute. These still lack configuration, however, which has been
fixed in the various `default.nix` files of individual projects.

Note that we (temporarily) lose the ability to build tvix-eval's
benchmarks in CI. I haven't figured out what magic incantation summons
them from the void again ...

The `eval-okay-readDir` tests from both test suites have been disabled
because they fail for unknown reasons when run in this new derivation.
Somebody will have to debug it!

Change-Id: I2014614ccb9c8951aedbd71df7966ca191a13695
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7538
Autosubmit: tazjin <tazjin@tvl.su>
Reviewed-by: flokli <flokli@flokli.de>
Tested-by: BuildkiteCI
2022-12-15 17:26:45 +00:00
Vincent Ambo
d9d627cdf0 refactor(tvix): share a Cargo.lock file between Rust projects
This relates to the (abandoned) cl/7256.

Introduces a Cargo workspace at //tvix that is primarily intended to
be used as a workaround for the annoying Nix+Rust tooling while having
a consistent set of dependencies.

This is driven in part by a desire to adopt crate2nix and get more
granular Nix builds for Tvix's Rust projects, and in part by a need to
split //tvix/eval into something providing the CLI (REPL etc.), and a
library providing eval, without significantly altering the structure
of build targets.

To accomplish this the workspace has been designed to allow projects
to remain independent build targets. I want to avoid lumping all the
projects together - something like //tvix/eval should always be
independent of other parts of tvix.

A helper function in //tvix/default.nix lets downstream naersk
projects construct a sparse root for the project which combines the
workspace's `Cargo.lock` with the project's own `Cargo.toml`.

Note that cargo commands in the workspace itself require the build
dependencies of _all_ projects to be present, which is currently a bit
annoying to accomplish.

This introduces some breakage:

1. It breaks usage of rust-analyser without being in a shell with the
   dependencies of *all* Tvix projects, as it is not capable of
   respecting only the subset of dependencies for a part of the
   workspace.

2. It is no longer possible to run tests using `cargo test`, as the
   test generation crate we use does not work with workspaces:

   https://github.com/frehberg/test-generator/issues/6

   This still works in the Nix build as we construct a Cargo project
   that looks like it's not in a workspace there. Until somebody fixes
   that crate / writes a new macro / does something else with the test
   suite, the way to run the tests is through the Nix build.

Long-term we'll probably want to get rid of cargo completely, it's
just a big wart and most tooling works without it if correctly
configured, but we don't have time for that now.

Change-Id: I846bff7a8429a25c077fd1e9ef4e3c34a299a4a1
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7533
Reviewed-by: flokli <flokli@flokli.de>
Autosubmit: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-15 17:26:45 +00:00
Vincent Ambo
0fd956f248 fix(tvix): remove disruptive .envrc file
This .envrc file causes additional software to be loaded, but there is
no way to opt-out even if the software is not desired:

1. If I opt-in (i.e. `direnv allow`) the file, additional stuff that I
   don't need is injected into my environment in a blocking way.

2. If I opt-out, *all* of the depot configuration (including `mg`) is
   unloaded, as direnv configurations do not trivially nest.

I have to work around this constantly by making the file contain just
the line `source_up` and then setting `--assume-unchanged` on the git
index to avoid accidentally committing the file changes.

This is kind of silly, the people who *want* this stuff to be loaded
should devise a mechanism that loads it automatically but is opt-in.

This could be done e.g. by gating something on environment variables,
or having a shell hook, or whatever. Breaking expectations that hold
elsewhere in depot is not okay, however.

If you manually want a shell for a project, run `mg shell` either with
a target specification for that project (e.g. `mg shell //tvix/store`)
or in the project's folder.

You can also just use standard nix-shell invocations.

Change-Id: I0de43378424d0cb1e1279c72c47940fecf497bf0
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7531
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: sterni <sternenseemann@systemli.org>
Tested-by: BuildkiteCI
Autosubmit: tazjin <tazjin@tvl.su>
2022-12-15 17:26:45 +00:00
Vincent Ambo
f282984c25 fix(tvix/eval): use rnix-parser from crates.io
A few weeks ago, oberblastmeister did a release to crates.io so we can
stop importing it via GitHub.

Change-Id: I9d5fa5cd281685779c71b12fed45ed201a1db17e
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7532
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
2022-12-06 18:29:50 +00:00
Florian Klink
0a4a0d1c6b feat(tvix/store): add size() and digest() functions for Directory
Change-Id: I3a9e3c77da1d5d7bfb93da0cd7bce8d48dbc8cd4
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7254
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-04 10:41:39 +00:00
Florian Klink
a97e3726df feat(tvix/store): build rust proto files
This uses prost-build to build the proto files.

Change-Id: Ia99fcfa4a19c741683cf28a45202e1d9211f9131
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7286
Tested-by: BuildkiteCI
Reviewed-by: tazjin <tazjin@tvl.su>
Reviewed-by: Adam Joseph <adam@westernsemico.com>
2022-12-04 10:41:39 +00:00
Florian Klink
c432aae9b3 feat(tvix/store): init
Change-Id: Id846647fa456ff8b187ed4f16d035ce030f11d25
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7264
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: tazjin <tazjin@tvl.su>
2022-12-04 10:41:39 +00:00
Florian Klink
12413a669f feat(tvix/store): add pathinfo.proto
This adds the PathInfo message, which hosts information about a Nix
Store path, mapping to either of a {Directory,File,Symlink}Node.

Change-Id: I79d871b6fad450d6a4ae4101fb72c51f9a83471f
Reviewed-on: https://cl.tvl.fyi/c/depot/+/7132
Reviewed-by: Adam Joseph <adam@westernsemico.com>
Reviewed-by: tazjin <tazjin@tvl.su>
Tested-by: BuildkiteCI
2022-12-04 10:41:39 +00:00