Enable the tokio unstable features

Author: sandhose

.cargo/config.toml

@@ -1,4 +1,7 @@
+[build]
+rustflags = ["--cfg", "tokio_unstable"]
+
 # On x86_64, we target the x86-64-v2 psABI, as it is a good compromise between
 # modern CPU instructions and compatibility.
 [target.x86_64-unknown-linux-gnu]
-rustflags = ["-C", "target-cpu=x86-64-v2"]
+rustflags = ["--cfg", "tokio_unstable", "-C", "target-cpu=x86-64-v2"]

.github/workflows/coverage.yaml

@@ -116,7 +116,7 @@ jobs:
         run: |
           cargo test --no-fail-fast --workspace
         env:
-          RUSTFLAGS: "-Cinstrument-coverage"
+          RUSTFLAGS: "-Cinstrument-coverage --cfg tokio_unstable"
           LLVM_PROFILE_FILE: "cargo-test-%p-%m.profraw"
           DATABASE_URL: postgresql://postgres:postgres@localhost/postgres
           SQLX_OFFLINE: "1"

crates/cli/build.rs

@@ -6,6 +6,9 @@
 use vergen_gitcl::{Emitter, GitclBuilder, RustcBuilder};
 
 fn main() -> anyhow::Result<()> {
+    // Instruct rustc that we'll be using #[cfg(tokio_unstable)]
+    println!("cargo::rustc-check-cfg=cfg(tokio_unstable)");
+
     // At build time, we override the version through the environment variable
     // VERGEN_GIT_DESCRIBE. In some contexts, it means this variable is set but
     // empty, so we unset it here.