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2024-05-08 r/8083 refactor(nix-compat/wire/bytes/reader): drop prev_fillededef1-2/+1
We specifically structured the code this way to allow using `this.filled` as-is, so we should use it. Change-Id: I7e11bddceb4d5f37b1dd4c453a9d53b85fc1f6c8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11602 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-06 r/8082 refactor(tvix): remove usage of async-recursionConnor Brewster8-68/+19
Rust 1.77 supports async recursion as long as there is some form of indirection (ie. `Box::pin`). This removes the need to use the async-recursion crate. Change-Id: Ic9613ab7f32016f0103032a861edff92e2fb8b41 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11596 Reviewed-by: flokli <flokli@flokli.de> Autosubmit: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-05-06 r/8081 fix(tvix/store/pathinfo/nix_http): update error messageFlorian Klink1-1/+1
Autosubmit was too fast and submitted this before my push went through. Flagged in https://cl.tvl.fyi/c/depot/+/11580/comment/40a56824_7be73334/ Change-Id: I1f835ae60c2c6fd2db6654c1b1c71d90bee141af Reviewed-on: https://cl.tvl.fyi/c/depot/+/11595 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-05-06 r/8080 feat(tvix/store): use async nar reader for ingest_narFlorian Klink7-351/+212
Rename read_nar to ingest_nar, and have it use the async nar reader version, and the ingest_entries machinery. This means we can now drop all code dealing with manually assembling castore nodes. Update our consumer, NixHTTPPathInfoService to use the new API. As we now accept an AsyncRead, we don't need to do any blocking here anymore, and can use the same async-compression crate as in the fetching logic (and support some more compression formats out of the box). Change-Id: I8646d20bd8603f8da47b5c84bc9e4ac236eb7f1a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11580 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-06 r/8079 test(tvix-castore/import): add tests for ingest_entriesFlorian Klink1-3/+138
Change-Id: Ia7906533868fd948509419e0d64b64582575a7fa Reviewed-on: https://cl.tvl.fyi/c/depot/+/11591 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-06 r/8078 fix(tvix/castore/import): assert end of streamFlorian Klink1-0/+5
Once we break out with the root node, there may be no more elements in the stream. Change-Id: I6f5fc5662095aa2b2a56bcad506d25520d9ad00c Reviewed-on: https://cl.tvl.fyi/c/depot/+/11592 Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de>
2024-05-06 r/8077 fix(tvix/castore/import): deal with entry.path() not having a parentFlorian Klink1-7/+9
We got away with not properly dealing with this for the archive case, where everything is contained inside a toplevel dir, but NARs can encode a single file/symlink. Properly break if the IngestionEntry path has the ROOT as parent, and only create filling directories in the other case. Change-Id: Ib378d0d1040de7c3fe310912a0b0488c55afee83 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11590 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-05 r/8076 feat(tvix-castore/import) have IngestionEntry.path() return &PathFlorian Klink2-3/+4
There's no need for this to be a &PathBuf. Change-Id: I2d4126d57cfd8ddaad5dd327943b70b83d45c749 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11589 Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-04 r/8075 feat(nix-compat/nar/reader): async supportedef6-1/+566
This is a first cut at the async NAR reader, with some rough edges. Poisoning is left unimplemented for now, pending future work. Change-Id: Ifaafe0581a5e0e165a13357b909fb441f7bd8bab Reviewed-on: https://cl.tvl.fyi/c/depot/+/11524 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-04 r/8074 feat(nix-compat/wire/bytes/reader): parametrise on trailer tagedef3-10/+31
This allows using BytesReader with a custom tag, eg the closing parens for the NAR reader. No public constructor is provided for custom-tagged readers, since this feature isn't public API. Change-Id: I82e73d064edc4b6783ead1d6fe46a5b35f45c844 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11543 Reviewed-by: Brian Olsen <me@griff.name> Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-04 r/8073 refactor(tvix/*store): use DS: DirectoryServiceFlorian Klink6-29/+23
We implement DirectoryService for Arc<DirectoryService> and Box<DirectoryService>, this is sufficient. Change-Id: I0a5a81cbc4782764406b5bca57f908ace6090737 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11586 Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-03 r/8072 docs(tvix/eval): add document about how binding construction worksVincent Ambo1-0/+133
Change-Id: I216be1b75eb9f18a58ab2164a77b3c51de8bf784 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11583 Autosubmit: tazjin <tazjin@tvl.su> Tested-by: BuildkiteCI Reviewed-by: Adam Joseph <adam@westernsemico.com>
2024-05-03 r/8071 refactor(tvix/store/pathinfo/sled): cleanup, add instrumentationFlorian Klink1-57/+42
Write this a bit more compact, by using map_err(|e| …) and ?. Ideally we'd get rid of the error mapping entirely, by using proper error types, but that's left for a followup. Change-Id: I68dc72b162ac89c5ff82d8c2bc26e1c808a0affd Reviewed-on: https://cl.tvl.fyi/c/depot/+/11584 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-03 r/8070 test(tvix/[ca]store): enable bigtable only with "integration" featureFlorian Klink10-15/+44
The emulator and bigtable client are quite big. Remove them from the default //tvix:shell. Put the tests behind a `integration` feature flag, and add a variant with that enabled to CI, and drop the bigtable tools from //tvix:shell. Change-Id: Ie042097a0d6fc26542faa96c139b77298ccb160a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11582 Reviewed-by: edef <edef@edef.eu> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-03 r/8069 chore(3p/overlays/tvl): switch to nixpkgs crate2nixFlorian Klink3-41/+10
Since a recent nixpkgs bump bringing a version of cargo with https://github.com/rust-lang/cargo/pull/12914, crate2nix creates a crate-hashes.json with all crate hashes from Cargo.lock (and downloads a lot of stuff while producing it). https://github.com/nix-community/crate2nix/pull/341 prevents this from happening, but our hardcoded crate2nix pin prevented us from getting the fix included in 0.14.0, which did land in nixpkgs. Replace the pin with a simply override, carrying our only leftover patch on top of it, and link to that PR. Change-Id: I9503898e15d61fa6a2b1589d141bec1b4ed3d616 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11581 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: sterni <sternenseemann@systemli.org>
2024-05-02 r/8068 chore(nix-compat): Document daemon protocol versionBrian Olsen1-0/+21
This documents which Nix version uses which daemon protocol version so that any implementor of the protocol can make informed choices about how far back to support legacy. Change-Id: If2fc11702f7f731816d51928efc9ea9d939e1c00 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11579 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-02 r/8067 refactor(tvix/castore/import): use crate Path[Buf] in IngestionEntryFlorian Klink4-69/+74
This explicitly splits ingestion-method-specific path types from the castore types. Change-Id: Ia3b16105fadb8d52927a4ed79dc4b34efdf4311b Reviewed-on: https://cl.tvl.fyi/c/depot/+/11563 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-05-02 r/8066 feat(tvix/castore/directory/traverse): use castore PathsFlorian Klink2-52/+17
This switches from using std::path::Path to using castore paths. We can drop some error handling in descend_to, as absolute (or redundant) paths are not representable. We however now need to convert from a std::path::Path to our representation, and decide to accept .. canonicalization, as paths in EvalIO might contain this. Dealing .. to hop into another store path, if we encounter this, should be dealt with in a previous step. Change-Id: I5e94693808420c5d56587c68731252b54755bf93 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11575 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-05-02 r/8065 feat(tvix/castore/path): implement PathBuf::from_host_pathFlorian Klink1-1/+105
This allows converting from std::path::Path to castore PathBufs. A flag is present to control .. canonicalization, and the usual caveats about platform-specific differences apply. Currently only added for unix, we'll carefully consider other platforms on a case-by-case basis. Change-Id: If289a92f75a2e5c3eec132b6a91a28d225fc1989 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11577 Reviewed-by: edef <edef@edef.eu> Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de>
2024-05-02 r/8064 refactor(nix-compat): derivation_or_fod_hash -> hash_derivation_moduloFlorian Klink4-48/+57
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
2024-05-01 r/8063 feat(tvix/castore/path): impl AsRef<Path> for PathFlorian Klink1-0/+6
This allows using both Path and PathBuf in a function argument taking `impl AsRef<Path>`. Change-Id: Ibd3ba6fac538069d2fe729d1ef399fdef301668f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11574 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-01 r/8062 feat(tvix/castore): expose PathBuf tooFlorian Klink1-1/+1
Change-Id: I1538725766a73436eba9a92dcb4f3275ace2fa4e Reviewed-on: https://cl.tvl.fyi/c/depot/+/11573 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-05-01 r/8061 fix(tvix/castore/path): join, push -> try_{join,push}edef1-7/+7
These are fallible methods, so they should be named accordingly. Change-Id: I6dc271c42989dd6500173488190f65381835d6fe Reviewed-on: https://cl.tvl.fyi/c/depot/+/11572 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8060 feat(tvix/castore/path): add PathBuf::{new, with_capacity, push}edef1-12/+37
Change-Id: Ia64f4bda80e91adbdb804f4f26cef5ace8f5406a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11571 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8059 feat(tvix/castore/path): more conversionsedef1-2/+37
Change-Id: I3ee510b444848316df520dc8ca445d0f3c7d607f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11567 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8058 feat(tvix/castore/path): single-component paths are children of ROOTedef1-11/+21
The empty path (Path::ROOT) is explicitly a valid path, and "foo" is simply a child of "". The root itself is the only path without a parent. Change-Id: Iff00dc8aed89eaf98702b664c0df658bd5a1d88a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11569 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-01 r/8057 test(tvix/castore/path): test the null byte caseedef1-0/+1
Change-Id: Ia4ceaf56f6cb4d8ed1ad935c77b3898d711da73a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11568 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8056 feat(tvix/castore/path): use proto::validate_node_nameedef2-6/+13
Use the shared code for validating node names, since that is what path components represent. Change-Id: I12109c1306b224718faa66cf1f2874c78c1436a7 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11566 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8055 chore(tvix/castore/path): drop now-duplicate testsedef1-24/+1
Since PathBuf doesn't have inherent methods anymore, these just forward to Path itself. Change-Id: I30f44adc9994337c367bad985ada0e8fcb98dd6a Reviewed-on: https://cl.tvl.fyi/c/depot/+/11570 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8054 feat(tvix/nar-bridge): support HTTP HEAD for narinfoEdwin Mackenzie-Owen1-28/+33
Change-Id: I4ec8e9108f52d0a84bc1af01a27bd51de4ab493f Reviewed-on: https://cl.tvl.fyi/c/depot/+/11456 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-01 r/8053 fix(nix-compat/store_path): permit store paths with dots againedef1-10/+8
Nix 2.4 accidentally permitted this behaviour, but the revert came too late to beat Hyrum's law. It is now considered permissible. Link: https://github.com/NixOS/nix/pull/9867 Change-Id: Ie97777af6765fe1c12c8aa593afe1c9b69125775 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11553 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8052 feat(tvix/castore/path): implement Debug + Displayedef1-3/+33
We implement Debug explicitly, so that we don't just see raw integers. Change-Id: I11213094728f3e0c674562ee71c092a950041632 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11565 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-05-01 r/8051 feat(tvix/castore/path): make Path unsized, repr-equivalent to [u8]edef1-51/+57
Change-Id: Ia1e6a10dba0bcda44e06e4cab7d4e52ca88b5859 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11564 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-05-01 r/8050 feat(tvix/castore/path): add Path{Buf}Florian Klink2-0/+248
This contains Path and PathBuf, representing platform-independent paths representable by the castore model. These are always relative, and platform-independent, which distinguishes them from the ones provided in the standard library. A subsequent CL will move IngestionEntry (and more) to use them. Change-Id: Ib85857f4159ebc2f3c00192c95d4e5b54ffd4fcf Reviewed-on: https://cl.tvl.fyi/c/depot/+/11558 Tested-by: BuildkiteCI Reviewed-by: edef <edef@edef.eu>
2024-04-30 r/8049 feat(tvix/store): use local object_store for tvix-store daemon blobsFlorian Klink1-1/+5
The sled backend doesn't perform very well with blobs in there, especially as it's not doing any chunking. Switch to the `objectstore+file://` instead, which does do CDC. Change-Id: Ic0d8836c6fc811b80c7202e3ee7f44a05a4f8dfa Reviewed-on: https://cl.tvl.fyi/c/depot/+/11554 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com> Tested-by: BuildkiteCI
2024-04-30 r/8048 refactor(tvix/castore/import): restructure error typesFlorian Klink7-72/+126
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/8047 refactor(tvix/castore): remove IngestionEntry::UnknownFlorian Klink2-10/+1
We shouldn't try to represent non-representable things in the ingestion entries (only to throw an error). It's cleaner to throw the error directly in the part producing the stream. Change-Id: I6b6f6d8c2f677425210142a39f1829ddeefec812 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11556 Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI Reviewed-by: firefly <firefly@firefly.nu>
2024-04-30 r/8046 refactor(tvix/castore/import): move upload_blob_at_path into fs modFlorian Klink2-28/+27
This is only useful for when we have access to a filesystem, so it shouldn't be in the root. Change-Id: I9923aaed1aef9d3a1e8fad41f58821d51c2eb34b Reviewed-on: https://cl.tvl.fyi/c/depot/+/11555 Autosubmit: flokli <flokli@flokli.de> Reviewed-by: firefly <firefly@firefly.nu> Tested-by: BuildkiteCI
2024-04-30 r/8045 fix(tvix/castore/import): symlink targets are Vec<u8>Florian Klink3-4/+9
These can be arbitrary bytes in theory. Some of our libraries might be more strict, or inconsistent w.r.t. their representation of path separators. Change-Id: I7981b74fc7d3dd79f5589cf2ef52ced7b71dd003 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11551 Tested-by: BuildkiteCI Reviewed-by: edef <edef@edef.eu>
2024-04-30 r/8044 docs(tvix/castore): fix tvix_castore::import sub-mod docstringsFlorian Klink2-2/+4
The one for `fs` was wrong, and ended up being attached to ingest_path, and the one for `archive` was missing entirely. Change-Id: I8a4c32fb5293badb1ea0764c278a88e4ca33c018 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11552 Tested-by: BuildkiteCI Reviewed-by: edef <edef@edef.eu>
2024-04-30 r/8043 fix(tvix/nix-compat/wire): RangeInclusive<usize> for memory size boundsedef2-32/+30
u64 is an inappropriate type for something memory-sized, and most callers end up with off-by-ones when using `..` rather than `..=`, including the tests for the module itself. Change-Id: If3b7bea27eb0a6c01e0a5d7e64966acbbb664268 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11550 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-04-30 r/8042 refactor(nix-compat/wire): drop primitive functionsedef6-112/+33
These may as well be inlined, and hardly need tests, since they just alias AsyncReadExt::read_u64_le / AsyncWriteExt::write_u64_le. Boolean reading is worth making explicit, since callers may differ on how they want to handle values other than 0 and 1. Boolean writing simplifies to `.write_u64_le(x as u64)`, which is also fine to inline. Change-Id: Ief9722fe886688693feb924ff0306b5bc68dd7a2 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11549 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-30 r/8041 refactor(nix-compat/wire/bytes): branchless padding computationedef1-7/+8
Change-Id: Ie07c2516a485c78afa6f9a3c8256e9708c4c42c5 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11548 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>
2024-04-30 r/8040 fix(tvix/nix-compat/wire/bytes): return UnexpectedEof for unexpected EOFedef1-4/+1
Change-Id: I8cb79f93742cc3a9088701bc8c2795de893eb6a8 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11547 Reviewed-by: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-30 r/8039 fix(tazj.in): fix redirectVincent Ambo1-1/+1
Change-Id: I0b695f0104bc587b1c5b7591c8d512a265d96873 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11534 Tested-by: BuildkiteCI Reviewed-by: tazjin <tazjin@tvl.su>
2024-04-30 r/8038 test(tvix): Fix tvix tests on macOSAlice Carroll3-7/+26
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/8037 feat(tvix/glue/tests): configure <nix NIX_PATHFlorian Klink1-0/+2
This is also needed to make `<nix/fetchurl.nix>` available in the testsuite. At some point, we might want to classify different types of tests excepting a different featureset, but for now, enabling this for all of glue is fine. Change-Id: Ided450bbb1f8eb7b66d454bd28bd19b17eb318e4 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11546 Tested-by: BuildkiteCI Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-04-29 r/8036 feat(tvix/glue/tests): wrap TvixStoreIO with TvixIOFlorian Klink1-1/+6
This makes `<nix/fetchurl.nix>` available in the testsuite. Change-Id: I04657b227c539edec86e5b6033e1016adcfce244 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11537 Tested-by: BuildkiteCI Autosubmit: flokli <flokli@flokli.de> Reviewed-by: Connor Brewster <cbrewster@hey.com>
2024-04-29 r/8035 refactor(tvix/glue/fetchers): rename "nixhash" to just "hash"Florian Klink1-12/+12
Change-Id: I2e40b1bcbd9932469ec2af9bb9ce20bb267566ec Reviewed-on: https://cl.tvl.fyi/c/depot/+/11536 Reviewed-by: Connor Brewster <cbrewster@hey.com> Autosubmit: flokli <flokli@flokli.de> Tested-by: BuildkiteCI
2024-04-29 r/8034 refactor(nix-compat/wire/bytes/reader): move size reading to async ctoredef1-137/+65
with_size only existed to allow separating the phases of reading size and reading data, and similarly the Size state only existed to allow folding size reading into poll_read. Neither of these are necessary if we make the constructor async, and handle the size reading there. As a bonus, this makes BytesReader::len sensibly typed, and permits implementing is_empty, as Clippy demands of us. Change-Id: I72173ec06d60b7998d16a3ecfc5e6ac5424bbed3 Reviewed-on: https://cl.tvl.fyi/c/depot/+/11542 Tested-by: BuildkiteCI Reviewed-by: flokli <flokli@flokli.de>