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2024-06-26 r/8313 feat(tvix/glue): implement builtins.toFileFlorian Klink1-9/+79
We currently only had a dummy implementation that didn't actually persist the files in the store(s). Copy the contents to the BlobService, and do the output path calculation as part of the upload. Use the plain context elements to construct the references. Change-Id: Ibdaf7a645ddc31e847faa4b87a79f2f95116a7ab Reviewed-on: https://cl.tvl.fyi/c/depot/+/11879 Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-06-26 r/8307 refactor(tvix/glue): return a parsed Url in NixFetchArgsFlorian Klink1-20/+16
The only two consumers (fetchurl, fetchtarball) of these do try to parse it as URL, so do it in the helper. Update url_basename to take a &url::URL, not a &str. Also update the test to use rstest for the fixtures to reduce some boilerplate there. Change-Id: I1f85fe2803060dc4423e673cb7b9f9bf799d09b9 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11875 Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com> Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-06-26 r/8306 refactor(tvix/glue): take &CAHash, not CAHashFlorian Klink1-9/+11
We use a bit less cloning that way. Change-Id: I28bf99577e4a481e35fbf99d0724adab5502a1bd Reviewed-on: https://cl.tvl.fyi/c/depot/+/11874 Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com>
2024-06-26 r/8305 feat(tvix/glue): handle regular file at builtins.path importFlorian Klink1-41/+114
If builtins.path is passed a regular file, no filtering is applied. We use the just-introduced file_type function in the EvalIO trait for that. This means, we don't need to pass through filtered_ingest, and can assemble the FileNode directly in that specific match case. This also means, we can explicitly calculate the sha256 flat digest, and avoid having to pipe through the file contents again (via blob_to_sha256_hash) to construct the sha256 digest. Change-Id: I500b19dd9e4b7cc897d88b44547e7851559e5a4e Reviewed-on: https://cl.tvl.fyi/c/depot/+/11872 Tested-by: BuildkiteCI Reviewed-by: Ilan Joselevich <personal@ilanjoselevich.com> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-06-13 r/8259 feat(tvix/glue): report progress on all fetches, use progress barsFlorian Klink1-3/+0
This should also report progress on fetches which we couldn't delay until actually having to IO into them, like `builtins.fetchurl` calls without a upfront-provided hash. While at it, upgrade the progress spinners to progress bars, which increment if we know the size of the fetch. Change-Id: Ic3f332286d8bc2177f3d994ba25b165728d4b702 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11797 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: aspen <root@gws.fyi>
2024-06-12 r/8254 feat(tvix/glue): support builtin:fetchurlFlorian Klink1-0/+12
nixpkgs calls <nix/fetchurl.nix> during nixpkgs bootstrap. This produces a fake derivation with system = builtin and builder = builtin:fetchurl, and needs to download files from the internet. At the end of the Derivation construction, if we have such a derivation, also synthesize a `Fetch` struct, which we add to the known fetch paths. This will then cause these fetches to be picked up like all other fetches in TvixStoreIO. Change-Id: I72cbca4f85da106b25eda97693a6a6e59911cd57 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10975 Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-06-12 r/8250 refactor(tvix/glue/fetchers): use named field for structsFlorian Klink1-3/+13
This allows giving more self-speaking names, as well as documenting each field individually. Change-Id: Ide164d684b7f819aac279cc8e657c02fc24d093f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11786 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-06-05 r/8217 feat(tvix/glue): Implement builtins.storePathAspen Smith2-1/+45
This one's relatively simple - we just check if the store path exists, and if it does we make a new contextful string containing the store path as its only context element. Automatic testing seems tricky for this (I think?) so I tested it manually: tvix-repl> builtins.storePath /nix/store/yn46i4xx5alh7gs6fpkxk430i34rp2q9-hello-2.12.1 => "/nix/store/yn46i4xx5alh7gs6fpkxk430i34rp2q9-hello-2.12.1" :: string Change-Id: I8a0d9726e4102ab872c53c2419679c2c855a5a18 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11696 Tested-by: BuildkiteCI Autosubmit: aspen <root@gws.fyi> Reviewed-by: flokli <flokli@flokli.de>
2024-05-23 r/8164 feat(tvix/eval): rm NixContext::join, add take_context & IntoIteratorFlorian Klink1-2/+2
In places where we want to extend context with that from another NixString, use take_context() to split it off, then call .extend(), making use of IntoIterator to avoid a bunch of clones. Change-Id: I2460141a3ed776c64c36132b2203b6a1d710b922 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11705 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: edef <edef@edef.eu>
2024-05-11 r/8103 refactor(tvix/store): drop calculate_nar from PathInfoServiceFlorian Klink2-3/+4
This shouldn't be part of the PathInfoService trait. Pretty much none of the PathInfoServices do implement it, and requiring them to implement it means they also cannot make use of this calculation already being done by other PathInfoServices. Move it out into its own NarCalculationService trait, defined somewhere at tvix_store::nar, and have everyone who wants to trigger nar calculation use nar_calculation_service directly, which now is an additional field in TvixStoreIO for example. It being moved outside the PathInfoService trait doesn't prohibit specific implementations to implement it (like the GRPC client for the `PathInfoService` does. This is currently wired together in a bit of a hacky fashion - as of now, everything uses the naive implementation that traverses blob and directoryservice, rather than composing it properly. I want to leave that up to a later CL, dealing with other parts of store composition too. Change-Id: I18d07ea4301d4a07651b8218bc5fe95e4e307208 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11619 Reviewed-by: Connor Brewster <cbrewster@hey.com> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-02 r/8064 refactor(nix-compat): derivation_or_fod_hash -> hash_derivation_moduloFlorian Klink1-10/+16
There's no need for us to come up with our own names for this. Also update the comments/docstrings a bit, and inline the intermediate hash_derivation_modulo calculation. Change-Id: I09dab8ffe1ebfb6601841e98119eee4ff25d8f39 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11578 Reviewed-by: edef <edef@edef.eu> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-30 r/8048 refactor(tvix/castore/import): restructure error typesFlorian Klink2-6/+4
Have ingest_entries return an Error type with only three kinds: - Error while uploading a specific Directory - Error while finalizing the directory upload - Error from the producer Move all ingestion method-specific errors to the individual implementations. Change-Id: I2a015cb7ebc96d084cbe2b809f40d1b53a15daf3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11557 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-04-30 r/8038 test(tvix): Fix tvix tests on macOSAlice Carroll1-0/+10
Prior to this, some tests would not build or would fail in an obscure way. Change-Id: I68587cc7592492ebfd71ca02fc7ccc9ff7c0196f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11544 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-04-29 r/8027 refactor(tvix/glue): clone lessFlorian Klink1-30/+28
Prepare the NixAttr to return without an intermediate Vec<(String, NixString)>, and without into_iter(), and send off the unmoved Derivation struct to known_paths without having to clone it. Change-Id: Icdb9f78938e998a27d0313c5d9ab15b93af5821d Reviewed-on: https://cl.tvl.fyi/c/depot/+/11531 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: edef <edef@edef.eu>
2024-04-24 r/8002 refactor(tvix/castore): add separate Error enum for archivesConnor Brewster1-0/+3
The `Error` enum for the `imports` crate has both filesystem and archive specific errors and was starting to get messy. This adds a separate `Error` enum for archive-specific errors and then keeps a single `Archive` variant in the top-level import `Error` for all archive errors. Change-Id: I4cd0746c864e5ec50b1aa68c0630ef9cd05176c7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11498 Tested-by: BuildkiteCI Autosubmit: Connor Brewster <cbrewster@hey.com> Reviewed-by: flokli <flokli@flokli.de>
2024-04-23 r/7996 feat(tvix/glue/fetchers): support file:// URLsFlorian Klink2-11/+31
Nix supports file:// - URLs for `fetchurl` and `fetchTarball`. Convert the enums and function arguments to hold a URL type. reqwest::Url is a re-export of the url crate, but they don't re-export the parsing errors, and as we want to hold these in our Error types, add it to Cargo.toml explicitly. The Fetcher::download function now checks on the scheme, and either opens the file locally, or does do a HTTP request as before. Fetch gets its custom debug impl, removing potentially sensitive username and password out of URLs. Change-Id: I777db1fe487370e822cbfec4624034aca5e08045 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11504 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI
2024-04-23 r/7994 feat(tvix/glue/store_io): have KnownPaths track fetches tooFlorian Klink2-6/+15
Have fetcher builtins call queue_fetch() whenever they don't need to fetch something immediately, and teach TvixStoreIO::store_path_to_node on how to look up (and call ingest_and persist on our Fetcher). Change-Id: Id4bd9d639fac9e4bee20c0b1c584148740b15c2f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11501 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de>
2024-04-23 r/7993 refactor(tvix/glue): move Fetch[er] into its own types, fetch lazilyFlorian Klink2-254/+117
We actually want to delay fetching until we actually need the file. A simple evaluation asking for `.outPath` or `.drvPath` should work even in a pure offline environment. Before this CL, the fetching logic was quite distributed between tvix_store_io, and builtins/fetchers.rs. Rather than having various functions and conversions between structs, describe a Fetch as an enum type, with the fields describing the fetch. Define a store_path() function on top of `Fetch` which can be used to ask for the calculated store path (if the digest has been provided upfront). Have a `Fetcher` struct, and give it a `fetch_and_persist` function, taking a `Fetch` as well as a desired name, and have it deal with all the logic of persisting the PathInfos. It also returns a StorePathRef, similar to the `.store_path()` method on a `Fetch` struct. In a followup CL, we can extend KnownPaths to track fetches AND derivations, and then use `Fetcher` when we need to do IO into that store path. Change-Id: Ib39a96baeb661750a8706b461f8ba4abb342e777 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11500 Reviewed-by: raitobezarius <tvl@lahfa.xyz> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-20 r/7987 refactor(tvix/castore): ingest filesystem entries in parallelFlorian Klink1-4/+9
Rather than carrying around an Future in the IngestionEntry::Regular, simply carry the plain B3Digest. Code reading through a non-seekable data stream has no choice but to read and upload blobs immediately, and code seeking through something seekable (like a filesystem) probably knows better what concurrency to pick when ingesting, rather than the consuming side. (Our only) one of these seekable source implementations is now doing exactly that. We produce a stream of futures, and then use [StreamExt::buffered] to process more than one, concurrently. We still keep the same order, to avoid shuffling things and violating the stream order. This also cleans up walk_path_for_ingestion in castore/import, as well as ingest_dir_entries in glue/tvix_store_io. Change-Id: I5eb70f3e1e372c74bcbfcf6b6e2653eba36e151d Reviewed-on: https://cl.tvl.fyi/c/depot/+/11491 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-04-20 r/7983 feat(tvix/eval): Implement builtins.fetchTarballAspen Smith2-7/+16
Implement a first pass at the fetchTarball builtin. This uses much of the same machinery as fetchUrl, but has the extra complexity that tarballs have to be extracted and imported as store paths (into the directory- and blob-services) before hashing. That's reasonably involved due to the structure of those two services. This is (unfortunately) not easy to test in an automated way, but I've tested it manually for now and it seems to work: tvix-repl> (import ../. {}).third_party.nixpkgs.hello.outPath => "/nix/store/dbghhbq1x39yxgkv3vkgfwbxrmw9nfzi-hello-2.12.1" :: string Co-authored-by: Connor Brewster <cbrewster@hey.com> Change-Id: I57afc6b91bad617a608a35bb357861e782a864c8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11020 Autosubmit: aspen <root@gws.fyi> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-19 r/7979 refactor(tvix/castore): generalize store ingestion streamsConnor Brewster1-23/+5
Previously the store ingestion code was coupled to `walkdir::DirEntry`s produced by the `walkdir` crate which made it impossible to reuse ingesting from other sources like tarballs or NARs. This introduces a `IngestionEntry` which carries enough information for store ingestion and a future for computing the Blake3 digest of files. This allows the producer to perform file uploads in a way that makes sense for the source, ie. the filesystem upload could concurrently upload multiple files at the same time, while the NAR ingestor will need to ingest the entire blob before yielding the next blob in the stream. In the future we can buffer small blobs and upload them concurrently, but the full blob still needs to be read from the NAR before advancing. Change-Id: I6d144063e2ba5b05e765bac1f27d41b3c8e7b283 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11462 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-19 r/7977 chore(tvix/glue): migrate from test_case to rstestFlorian Klink1-102/+212
Change-Id: Id1bac94e7b95960dabd55f095f04bdabfeee10ea Reviewed-on: https://cl.tvl.fyi/c/depot/+/11476 Reviewed-by: Connor Brewster <cbrewster@hey.com> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-15 r/7925 refactor(tvix/*/import): rename direntry_stream, entries_per_depthsFlorian Klink1-4/+5
Align these names and comments with the two users, to make it more obvious we're doing the same thing here, just use a different method to come up with entries_per_depths. Change-Id: I42058e397588b6b57a6299e87183bef27588b228 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11415 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-04-13 r/7899 feat(tvix/eval): contextful JSON operationsRyan Lahfa1-4/+3
`toJSON` transform a Nix structure into a JSON string. For each context in that Nix structure, the JSON string must possess it. Thus, it is necessary to take the union of all contexts and attach it to the final structure. Unfortunately, the return type of `into_json` is a serde's JSON object, not a string. Therefore, it is not possible to reuse `NixString` machinery. Context tests are reinforced as Nix does not test those behaviors. Fixes b/393. Change-Id: I5afdbc4e18dd70469192c1aa657d1049ba330149 Signed-off-by: Ryan Lahfa <tvl@lahfa.xyz> Reviewed-on: https://cl.tvl.fyi/c/depot/+/11266 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-13 r/7890 feat(tvix/nix-compat): implement Serialize, Deserialize for NixHashFlorian Klink1-1/+1
We use the (slightly more tolerant) from_str to deserialize, and serialize out as SRI. Change-Id: If76b0ed2d4e243904f02df34f6c90b976c0bab8c Reviewed-on: https://cl.tvl.fyi/c/depot/+/11393 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz>
2024-04-09 r/7882 fix(tvix): Avoid buffering file into memory in builtins.hashFileConnor Brewster1-3/+3
Right now `builtins.hashFile` always reads the entire file into memory before hashing, which is not ideal for large files. This replaces `read_to_string` with `open_file` which allows calculating the hash of the file without buffering it entirely into memory. Other callers can continue to buffer into memory if they choose, but they still use the `open_file` VM request and then call `read_to_string` or `read_to_end` on the `std::io::Reader`. Fixes b/380 Change-Id: Ifa1c8324bcee8f751604b0b449feab875c632fda Reviewed-on: https://cl.tvl.fyi/c/depot/+/11236 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-08 r/7880 fix(tvix/glue/derivation): fix __structuredAttrs "outputs" handlingFlorian Klink2-3/+12
In case structured attrs is enabled, rather than adding a space-separated list to the "outputs" environment variable, a "proper" list is added to the JSON itself, at the "outputs" key. Fixes b/395. Reported-By: Alyssa Ross <hi@alyssa.is> Change-Id: I2834ede9cfcf49d5e81e1056bf8f9bb9b65ddad8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11386 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz>
2024-04-03 r/7850 fix(tvix/glue): produce context for `builtins.(path|filterSource)`Ryan Lahfa1-4/+15
Fixes b/392. Output paths were created, depending on a plain store path but no context string was attached to track that plain dependency. Context string propagation tests are strengthened to prevent any regression on this. Change-Id: Ifd6671aeba6949324b0bb9f0f766b87db728d484 Signed-off-by: Ryan Lahfa <tvl@lahfa.xyz> Reviewed-on: https://cl.tvl.fyi/c/depot/+/11351 Reviewed-by: Alyssa Ross <hi@alyssa.is> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-04-01 r/7840 feat(tvix/eval): implement `builtins.path`Ryan Lahfa3-2/+314
Now, it supports almost everything except `recursive = false;`, i.e. `flat`-ingestion because we have no knob exposed in the tvix store import side to do it. This has been tested to work. Change-Id: I2e9da10ceccdfbf45b43c532077ed45d6306aa98 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10597 Tested-by: BuildkiteCI Autosubmit: raitobezarius <tvl@lahfa.xyz> Reviewed-by: flokli <flokli@flokli.de>
2024-04-01 r/7839 refactor(tvix/store): generalize `PathInfo` constructorsRyan Lahfa1-1/+13
Instead of enforcing NAR SHA256 all the time, we generalize the `PathInfo` constructor to take a `CAHash` argument which can drive whether we are having a flat, NAR or text scheme. With this, it is now possible to implement flat schemes in our evaluation builtins, e.g. `builtins.path`. Change-Id: I15bfee0ef4f0f428bfbd2f30c57c012cdcf6a976 Signed-off-by: Ryan Lahfa <tvl@lahfa.xyz> Reviewed-on: https://cl.tvl.fyi/c/depot/+/11286 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-03-31 r/7805 feat(tvix/eval): support `Derivation` context elementsRyan Lahfa1-8/+34
Derivation that depends on `${d.drvPath}` generates a `NixContextElement::Derivation(drvPath)` context string. In turn, this makes the dependent derivation depend on *ALL* outputs of that derivation. Note that a dependency on `${d.drvPath}` generates an input source dependency too. This is a complete implementation of the context string system in Nix on the "input population" side. The test coverage of this change is taken care in cl/11264. Change-Id: I97fe5f7c772a6b1cc4366bee071aa691a11fcde6 Signed-off-by: Ryan Lahfa <tvl@lahfa.xyz> Reviewed-on: https://cl.tvl.fyi/c/depot/+/11261 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-03-28 r/7800 refactor(tvix/glue): drop ingest_entries_syncFlorian Klink1-6/+9
Make this function async, and do the block_on on the (single) callsite. Change-Id: Ib8b0b54ab5370fe02ef95f38a45d8866868a9d60 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11285 Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-03-28 r/7799 refactor(tvix/glue): drop register_node_in_path_info_service_syncFlorian Klink1-1/+6
Replace the (single) callsite with some code interacting with the tokio runtime to block on the async version. Change-Id: I3976496ae77b2bb8734603f303655834265e3f0a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11284 Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-03-11 r/7678 feat(tvix/glue): Implement builtins.fetchurlAspen Smith5-45/+322
Implement the fetchurl builtin, and lay the groundwork for implementing the fetchTarball builtin (which works very similarly, and is implemented using almost the same code in C++ nix). An overview of how this works: 1. First, we check if the store path that *would* result from the download already exists in the store - if it does, we just return that 2. If we need to download the URL, TvixStoreIO has an `http_client: reqwest::Client` field now which we use to make the request 3. As we're downloading the blob, we hash the data incrementally into a SHA256 hasher 4. We compare the hash against the expected hash (if any) and bail out if it doesn't match 5. Finally, we put the blob in the store and return the store path Since the logic is very similar, this commit also implements a *chunk* of `fetchTarball` (though the actual implementation will likely include a refactor to some of the code reuse here). The main thing that's missing here is caching of downloaded blobs when fetchurl is called without a hash - I've opened b/381 to track the TODO there. Adding the `SSL_CERT_FILE` here is necessary to teach reqwest how to load it during tests - see 1c16dee20 (feat(tvix/store): use reqwests' rustls-native-roots feature, 2024-03-03) for more info. Change-Id: I83c4abbc7c0c3bfe92461917e23d6d3430fbf137 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11017 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Autosubmit: aspen <root@gws.fyi>
2024-02-23 r/7596 refactor(tvix/glue): Make a single errors.rs moduleAspen Smith2-10/+9
To pave the way for adding a new error type for builtins in this crate, move DerivationError to a new builtins::errors module. Change-Id: I65fcad63e43ed40ad39c2c6540a2ab80fdd90fd4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11016 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Autosubmit: aspen <root@gws.fyi>
2024-02-21 r/7591 feat(tvix/eval): Store string context alongside dataAspen Smith2-16/+12
Previously, Nix strings were represented as a Box (within Value) pointing to a tuple of an optional context, and another Box pointing to the actual string allocation itself. This is pretty inefficient, both in terms of memory usage (we use 48 whole bytes for a None context!) and in terms of the extra indirection required to get at the actual data. It was necessary, however, because with native Rust DSTs if we had something like `struct NixString(Option<NixContext>, BStr)` we could only pass around *fat* pointers to that value (with the length in the pointer) and that'd make Value need to be bigger (which is a waste of both memory and cache space, since that memory would be unused for all other Values). Instead, this commit implements *manual* allocation of a packed string representation, with the length *in the allocation* as a field past the context. This requires a big old pile of unsafe Rust, but the payoff is clear: hello outpath time: [882.18 ms 897.16 ms 911.23 ms] change: [-15.143% -13.819% -12.500%] (p = 0.00 < 0.05) Performance has improved. Fortunately this change can be localized entirely within value/string.rs, since we were abstracting things out nicely. Change-Id: Ibf56dd16c9c503884f64facbb7f0ac596463efb6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10852 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz> Autosubmit: aspen <root@gws.fyi>
2024-02-21 r/7588 revert(tvix): don't use Rc::clone explicitlyaspen2-5/+5
This reverts commit d9565a4d0af3bffd735a77aa6f1fd0ec0e03b14a. Reason for revert: this was intentional - putting Rc::clone instead of .clone is a common Rust idiom, and makes it explicit that we're cloning a shared reference, not an underlying resource Change-Id: I41a5f323ee35d7025dc7bb02f7d5d05d0051798d Reviewed-on: https://cl.tvl.fyi/c/depot/+/10995 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-02-21 r/7585 feat(tvix/nix-compat): Use `StorePath` in `Output`Peter Kolloch1-2/+2
https: //b.tvl.fyi/issues/264 Change-Id: Icb09be9643245cc68d09f01d7723af2d44d6bd1a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11001 Autosubmit: Peter Kolloch <info@eigenvalue.net> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-02-21 r/7584 feat(tvix/nix-compat): input_sources as StorePathPeter Kolloch1-2/+5
https: //b.tvl.fyi/issues/264 Change-Id: I7a235734dc1f8e93e387a04ba369f3b702c6d5b6 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10992 Autosubmit: Peter Kolloch <info@eigenvalue.net> Reviewed-by: flokli <flokli@flokli.de> Reviewed-by: Peter Kolloch <info@eigenvalue.net> Tested-by: BuildkiteCI
2024-02-21 r/7583 feat(tvix/nix-compat): input_derivations with StorePathsPeter Kolloch1-1/+18
...in `Derivation`. This is more type-safe and should consume less memory. This also removes some allocations in the potentially hot path of output hash calculation. https: //b.tvl.fyi/issues/264 Change-Id: I6ad7d3cb868dc9f750894d449a6065608ef06e8c Reviewed-on: https://cl.tvl.fyi/c/depot/+/10957 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Autosubmit: Peter Kolloch <info@eigenvalue.net> Reviewed-by: Peter Kolloch <info@eigenvalue.net>
2024-02-20 r/7578 feat(tvix/eval): implement `builtins.filterSource`Ryan Lahfa2-3/+315
We add a new set of builtins called `import_builtins`, which will contain import-related builtins, such as `builtins.path` and `builtins.filterSource`. Both can import paths into the store, with various knobs to alter the result, e.g. filtering, renaming, expected hashes. We introduce `filtered_ingest` which will drive the filtered ingestion via the Nix function via the generator machinery, and then we register the root node to the path info service inside the store. `builtins.filterSource` is very simple, `builtins.path` is a more complicated model requiring the same logic albeit more sophisticated with name customization, file ingestion method and expected SHA-256. Change-Id: I1083f37808b35f7b37818c8ffb9543d9682b2de2 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10654 Autosubmit: raitobezarius <tvl@lahfa.xyz> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-02-20 r/7576 refactor(tvix): don't use Rc::clone explicitlyFlorian Klink1-3/+3
All these functions have an Rc of Rc<TvixStoreIO> or Rc<dyn StoreIO>, so we can call io.clone() directly. Change-Id: I96a5bcb9af4aca93892cb72bcfaf14540da52381 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10989 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2024-02-19 r/7557 feat(tvix/glue): Init fetcher builtinsAspen Smith2-3/+57
Initialize a new empty builtins module `fetcher_builtins`, which will contain the builtins which fetch URLs from the internet: * fetchurl * fetchGit * fetchTarball * fetchTree (maybe? this is experimental) These builtins are all implemented in CPP nix at: https://github.com/NixOS/nix/blob/2.20.2/src/libexpr/primops/fetchTree.cc These builtins are added to the evaluation context using a similar mechanism to the derivation builtins, and have been added everywhere derivation builtins were previously being added. Change-Id: I133b91cc9560f23028621414537f712e7bd8a825 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10974 Autosubmit: aspen <root@gws.fyi> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-02-17 r/7540 refactor(tvix/glue/known_paths): use StorePathFlorian Klink1-1/+1
Passing a StorePathRef is annoying if we only (already) have a StorePath. Change-Id: Ic3b36c0041707230515a6745a57f0d25b2bafd16 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10948 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de> Reviewed-by: Peter Kolloch <info@eigenvalue.net>
2024-02-17 r/7534 refactor(tvix/glue/KnownPaths): track Derivation struct tooFlorian Klink1-7/+6
We need to not only store a map from drv path to hash derivation modulo, but also keep the original Derivation struct - because we'll use that later to trigger builds. Change-Id: I78e2e8431ab5ae853188866b797a79025200de98 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10790 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz>
2024-02-13 r/7508 feat(tvix/eval): Box Value::CatchableAspen Smith1-8/+8
This is now the only enum variant for Value that is larger than 8 bytes (it's 16 bytes), so boxing it (especially since it's not perf-critical) allows us to get the Value size down to only 16 bytes! Change-Id: I98598e2b762944448bef982e8ff7da6d6683c4aa Reviewed-on: https://cl.tvl.fyi/c/depot/+/10798 Tested-by: BuildkiteCI Reviewed-by: raitobezarius <tvl@lahfa.xyz> Autosubmit: aspen <root@gws.fyi>
2024-02-13 r/7506 fix(tvix/eval): Replace inner NixString repr with Box<Bstr>Aspen Smith1-14/+11
Storing a full BString here incurs the extra overhead of the capacity for the inner byte-vector, which we basically never use as Nix strings are immutable (and we don't do any mutation / sharing analysis). Switching to a Box<BStr> cuts us from 72 bytes to 64 bytes per string (and there are a lot of strings!) Change-Id: I11f34c14a08fa02759f260b1c78b2a2b981714e4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10794 Autosubmit: aspen <root@gws.fyi> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-02-02 r/7467 refactor(tvix/eval): Box Value::StringAspen Smith2-5/+5
NixString is *quite* large - like 80 bytes - because of the extra capacity value for BString and because of the context. We want to keep Value small since we're passing it around a lot, so let's box the NixString inside Value::String to save on some memory, and make cloning ostensibly a little cheaper Change-Id: I343c8b4e7f61dc3dcbbaba4382efb3b3e5bbabb2 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10729 Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2024-01-31 r/7460 fix(tvix): Represent strings as byte arraysAspen Smith2-38/+45
C++ nix uses C-style zero-terminated char pointers to represent strings internally - however, up to this point, tvix has used Rust `String` and `str` for string values. Since those are required to be valid utf-8, we haven't been able to properly represent all the string values that Nix supports. To fix that, this change converts the internal representation of the NixString struct from `Box<str>` to `BString`, from the `bstr` crate - this is a wrapper around a `Vec<u8>` with extra functions for treating that byte vector as a "morally string-like" value, which is basically exactly what we need. Since this changes a pretty fundamental assumption about a pretty core type, there are a *lot* of changes in a lot of places to make this work, but I've tried to keep the general philosophy and intent of most of the code in most places intact. Most notably, there's nothing that's been done to make the derivation stuff in //tvix/glue work with non-utf8 strings everywhere, instead opting to just convert to String/str when passing things into that - there *might* be something to be done there, but I don't know what the rules should be and I don't want to figure them out in this change. To deal with OS-native paths in a way that also works in WASM for tvixbolt, this also adds a dependency on the "os_str_bytes" crate. Fixes: b/189 Fixes: b/337 Change-Id: I5e6eb29c62f47dd91af954f5e12bfc3d186f5526 Reviewed-on: https://cl.tvl.fyi/c/depot/+/10200 Reviewed-by: tazjin <tazjin@tvl.su> Reviewed-by: flokli <flokli@flokli.de> Reviewed-by: sterni <sternenseemann@systemli.org> Autosubmit: aspen <root@gws.fyi> Tested-by: BuildkiteCI
2024-01-19 r/7422 chore(3p/sources): Bump channels & overlayssterni1-2/+0
- Adjust to ecl 23.9.9 release - Regenerate go protos after protoc-gen-go update - Drop dhall fork which hasn't kept up with 1.42.* - Address new clippy warnings: - Variant naming of Error::ValidationError - Simplify .try_into().unwrap() - Drop unnecessary identity function - Test module must be last in file - Drop unused `pub use` - Update agenix to 0.15.0. Current master has a installCheckPhase that doesn't work with C++ Nix 2.3.*: https://github.com/ryantm/agenix/commit/a23aa271bec82d3e962bafb994595c1c4a62b133#commitcomment-137185861 Change-Id: Ic29eef20d6fd1362ce1031364a5ca6b4edf195bd Reviewed-on: https://cl.tvl.fyi/c/depot/+/10615 Reviewed-by: aspen <root@gws.fyi> Tested-by: BuildkiteCI Autosubmit: sterni <sternenseemann@systemli.org>