sapling/eden/scm/lib/cpython-async/Cargo.toml

[package]
name = "cpython-async"
version = "0.1.0"
edition = "2018"

[dependencies]
anyhow = "1"
async-runtime = { path = "../async-runtime" }
cpython-ext = { path = "../cpython-ext", default-features = false }
futures = "0.3"
itertools = "0.8"

[dev-dependencies]
tokio = { version = "1", features = ["full"] }

[features]
default = ["python3"]
python2 = ["cpython-ext/python2"]
python3 = ["cpython-ext/python3"]
cpython-async: expose Rust Stream to Python Summary: The exposed type can be used as a Python iterator: for value in stream: ... The Python type can be used as input and output parameters in binding functions: # Rust type S = TStream<anyhow::Result<X>>; def f1() -> PyResult<S> { ... } def f2(x: S) -> PyResult<S> { Ok(x.stream().map_ok(...).into()) } # Python stream1 = f1() stream2 = f2(stream1) This crate is similar to `cpython-ext`: it does not define actual business logic exposed by `bindings` module. So it's put in `lib`, not `bindings/modules`. Reviewed By: markbt Differential Revision: D23799641 fbshipit-source-id: c13b0c788a6465679b562976728f0002fd872bee 2020-09-21 23:26:13 +03:00			`[package]`
			`name = "cpython-async"`
			`version = "0.1.0"`
			`edition = "2018"`

			`[dependencies]`
			`anyhow = "1"`
			`async-runtime = { path = "../async-runtime" }`
			`cpython-ext = { path = "../cpython-ext", default-features = false }`
			`futures = "0.3"`
cpython-async: drop py_stream_class macro Summary: The py_stream_class causes the code to be more verbose. It basically enforces the bindings crate to define new types wrapping pure Rust types, and then define py_stream_class. In a future diff, I'm adding FromPyObject/ToPyObject support for types that implements serde Deserialize/Serialize. py_stream_class gets in the way, because the blanket type from cpython-ext cannot be used in the py_stream_class macro. cpython-ext is not the proper place to define business-related stream types. Therefore, define a type-erased Python class, and implement FromPyObject/ToPyObject automatically for TStream<anyhow::Result<T>> where T implements FromPyObject or ToPyObject. The FromPyObject now converts a Python iterator back to a stream. It's no longer zero-cost. However, I'd imagine such usecases can be short-cut using pure Rust code. Background: Initially, I added some FromPyObject/ToPyObject impls to pure Rust crates gated by a "pytypes" feature. While that works fine with cargo build, buck does not support dynamic features and the fact that we support both py2 and py3 makes it extremely hard to support cleanly in buck build. For example, if minibytes::Bytes defines ToPyObject for Bytes, then any crate using minibytes would have 2 different versions: a py2 version, a py3 version, and they both depend on python. That seems to be a bad approach. Reviewed By: sfilipco Differential Revision: D23966984 fbshipit-source-id: eafb31ad458dcbdd8e970d8e419a10fbbe30595f 2020-10-03 07:50:08 +03:00			`itertools = "0.8"`

			`[dev-dependencies]`
lib: upgrade most crates to tokio 1.0 Summary: Migrate most crates to tokio 1.0. The exception is edenfs-client, which has some dependencies on `//common/rust/shed/fbthrift_ext` and seems non-trivial to upgrade. It creates a separate tokio runtime so it shouldn't be affected feature-wise. Reviewed By: singhsrb Differential Revision: D26152862 fbshipit-source-id: c84c43b1b1423eabe3543bccde34cc489b7805be 2021-01-30 05:16:21 +03:00			`tokio = { version = "1", features = ["full"] }`
cpython-async: expose Rust Stream to Python Summary: The exposed type can be used as a Python iterator: for value in stream: ... The Python type can be used as input and output parameters in binding functions: # Rust type S = TStream<anyhow::Result<X>>; def f1() -> PyResult<S> { ... } def f2(x: S) -> PyResult<S> { Ok(x.stream().map_ok(...).into()) } # Python stream1 = f1() stream2 = f2(stream1) This crate is similar to `cpython-ext`: it does not define actual business logic exposed by `bindings` module. So it's put in `lib`, not `bindings/modules`. Reviewed By: markbt Differential Revision: D23799641 fbshipit-source-id: c13b0c788a6465679b562976728f0002fd872bee 2020-09-21 23:26:13 +03:00
			`[features]`
			`default = ["python3"]`
			`python2 = ["cpython-ext/python2"]`
			`python3 = ["cpython-ext/python3"]`