cleanup some futures-related references (pantsbuild#11360)

- Cleanup futures-related references in various `Cargo.toml` files and source files now that v0.3.x is the only version.

- Remove ASYNC.md documentation that only dealt with futures v0.1.x / v0.3.x interoperability.

src/rust/engine/Cargo.toml

@@ -106,7 +106,7 @@ cpython = "0.5"
 crossbeam-channel = "0.4"
 fnv = "1.0.5"
 fs = { path = "fs" }
-futures = { version = "0.3" }
+futures = "0.3"
 graph = { path = "graph" }
 hashing = { path = "hashing" }
 indexmap = "1.4"

src/rust/engine/fs/fs_util/Cargo.toml

@@ -12,7 +12,7 @@ clap = "2"
 env_logger = "0.5.4"
 grpc_util = { path = "../../grpc_util" }
 fs = { path = ".." }
-futures = { version = "0.3" }
+futures = "0.3"
 hashing = { path = "../../hashing" }
 parking_lot = "0.11"
 prost = { git = "https://github.com/danburkert/prost", rev = "a1cccbcee343e2c444e1cd2738c7fba2599fc391" }

src/rust/engine/fs/store/Cargo.toml

@@ -12,7 +12,7 @@ bytes = "0.5"
 concrete_time = { path = "../../concrete_time" }
 grpc_util = { path = "../../grpc_util" }
 fs = { path = ".." }
-futures = { version = "0.3" }
+futures = "0.3"
 glob = "0.2.11"
 hashing = { path = "../../hashing" }
 indexmap = "1.4"

src/rust/engine/grpc_util/Cargo.toml

@@ -7,7 +7,7 @@ publish = false
 
 [dependencies]
 bytes = "0.5"
-futures = { version = "0.3" }
+futures = "0.3"
 prost = "0.6"
 prost-types = "0.6"
 tokio = { version = "0.2.23", features = ["process", "rt-threaded", "sync", "tcp", "time"] }

src/rust/engine/nailgun/Cargo.toml

@@ -8,7 +8,7 @@ publish = false
 [dependencies]
 async_latch = { path = "../async_latch" }
 bytes = "0.5"
-futures = "0.3.5"
+futures = "0.3"
 log = "0.4"
 nails = "0.8"
 os_pipe = "0.9"

src/rust/engine/process_execution/Cargo.toml

@@ -14,7 +14,7 @@ bytes = "0.5"
 derivative = "2.1.1"
 grpc_util = { path = "../grpc_util" }
 fs = { path = "../fs" }
-futures = { version = "0.3", features = ["compat"] }
+futures = "0.3"
 hashing = { path = "../hashing" }
 libc = "0.2.39"
 log = "0.4"

src/rust/engine/process_execution/src/cache.rs

@@ -3,7 +3,7 @@ use std::sync::Arc;
 use async_trait::async_trait;
 use bazel_protos::gen::build::bazel::remote::execution::v2 as remexec;
 use bytes::Bytes;
-use futures::{future as future03, FutureExt};
+use futures::{future, FutureExt};
 use hashing::Fingerprint;
 use log::{debug, warn};
 use prost::Message;
@@ -157,7 +157,7 @@ impl CommandRunner {
     };
 
     // Ensure that all digests in the result are loadable, erroring if any are not.
-    let _ = future03::try_join_all(vec![
+    let _ = future::try_join_all(vec![
       self
         .file_store
         .ensure_local_has_file(result.stdout_digest)

src/rust/engine/process_executor/Cargo.toml

@@ -10,7 +10,7 @@ clap = "2"
 dirs = "1"
 env_logger = "0.5.4"
 fs = { path = "../fs" }
-futures = { version = "0.3", features = ["compat"] }
+futures = "0.3"
 hashing = { path = "../hashing" }
 log = "0.4"
 process_execution = { path = "../process_execution" }

src/rust/engine/src/externs/interface.rs

@@ -59,7 +59,7 @@ use cpython::{
   ToPyObject,
 };
 use futures::future::FutureExt;
-use futures::future::{self as future03, TryFutureExt};
+use futures::future::{self, TryFutureExt};
 use futures::Future;
 use hashing::Digest;
 use log::{self, debug, error, warn, Log};
@@ -1586,7 +1586,7 @@ fn capture_snapshots(
         .collect::<Vec<_>>();
       py.allow_threads(|| {
         core.executor.block_on(
-          future03::try_join_all(snapshot_futures)
+          future::try_join_all(snapshot_futures)
             .map_ok(|values| externs::store_tuple(values).into()),
         )
       })
@@ -1659,7 +1659,7 @@ fn single_file_digests_to_bytes(
     let bytes_values: Vec<PyObject> = py
       .allow_threads(|| {
         core.executor.block_on(
-          future03::try_join_all(digest_futures)
+          future::try_join_all(digest_futures)
             .map_ok(|values: Vec<Value>| values.into_iter().map(|val| val.into()).collect()),
         )
       })

src/rust/engine/testutil/mock/Cargo.toml

@@ -9,7 +9,7 @@ publish = false
 async-stream = "0.2"
 bazel_protos = { path = "../../process_execution/bazel_protos" }
 bytes = "0.5"
-futures = { version = "0.3" }
+futures = "0.3"
 hashing = { path = "../../hashing" }
 hyper = { version = "0.13", features = ["stream", "tcp"] }
 log = "0.4"

src/rust/engine/tryfuture/Cargo.toml

@@ -6,5 +6,5 @@ authors = [ "Pants Build <[email protected]>" ]
 publish = false
 
 [dependencies]
-futures = { version = "0.3" }
+futures = "0.3"
 

src/rust/engine/ui/Cargo.toml

@@ -8,7 +8,7 @@ authors = [ "Pants Build <[email protected]>" ]
 path = "src/console_ui.rs"
 
 [dependencies]
-futures = { version = "0.3" }
+futures = "0.3"
 indicatif = "0.14.0"
 indexmap = "1.4"
 uuid = { version = "0.7", features = ["v4"] }