aaf258f61e
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> |
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.. | ||
docs | ||
protos | ||
src | ||
build.rs | ||
Cargo.toml | ||
default.nix | ||
README.md |
//tvix/store
This contains the code hosting the tvix-store.
For the local store, Nix realizes files on the filesystem in /nix/store
(and
maintains some metadata in a SQLite database). For "remote stores", it
communicates this metadata in NAR (Nix ARchive) and NARInfo format.
Compared to the Nix model, tvix-store
stores data on a much more granular
level than that, which provides more deduplication possibilities, and more
granular copying.
However, enough information is preserved to still be able to render NAR and NARInfo when needed.
More Information
The store consists out of two different gRPC services, tvix.castore.v1
for
the low-level content-addressed bits, and tvix.store.v1
for the Nix and
StorePath
-specific bits.
Check the protos/
subfolder both here and in castore
for the definition of
the exact RPC methods and messages.
Interacting with the GRPC service manually
The shell environment in //tvix
provides evans
, which is an interactive
REPL-based gPRC client.
You can use it to connect to a tvix-store
and call the various RPC methods.
$ cargo run -- daemon &
$ evans --host localhost --port 8000 -r repl
______
| ____|
| |__ __ __ __ _ _ __ ___
| __| \ \ / / / _. | | '_ \ / __|
| |____ \ V / | (_| | | | | | \__ \
|______| \_/ \__,_| |_| |_| |___/
more expressive universal gRPC client
localhost:8000> package tvix.castore.v1
tvix.castore.v1@localhost:8000> service BlobService
tvix.castore.v1.BlobService@localhost:8000> call Put --bytes-from-file
data (TYPE_BYTES) => /run/current-system/system
{
"digest": "KOM3/IHEx7YfInAnlJpAElYezq0Sxn9fRz7xuClwNfA="
}
tvix.castore.v1.BlobService@localhost:8000> call Read --bytes-as-base64
digest (TYPE_BYTES) => KOM3/IHEx7YfInAnlJpAElYezq0Sxn9fRz7xuClwNfA=
{
"data": "eDg2XzY0LWxpbnV4"
}
$ echo eDg2XzY0LWxpbnV4 | base64 -d
x86_64-linux
Thanks to tvix-store
providing gRPC Server Reflection (with reflection
feature), you don't need to point evans
to the .proto
files.