Fix workspace issues when building for stable.

.github/workflows/test.yml

@@ -38,7 +38,7 @@ jobs:
           toolchain: ${{ matrix.rust }}
           target: ${{ matrix.target }}
 
-      - run: sed -i '/nightly-only/d' Cargo.toml
+      - run: mv Cargo.stable.toml Cargo.toml
         if: matrix.rust != 'nightly'
 
       - run: cargo check --target=${{ matrix.target }} --features=${{ matrix.features }}

Cargo.stable.toml

@@ -0,0 +1,20 @@
+# CI moves this file to `Cargo.toml` when building for stable.
+
+[workspace]
+resolver = "2"
+
+members = [
+    "embedded-hal",
+    "embedded-hal-nb",
+    "embedded-hal-bus",
+    "embedded-can",
+    "embedded-io",
+    "embedded-io-adapters",
+]
+
+# Cargo implicitly adds path dependencies to the workspace.
+# Even if they're optional and not enabled. This prevents that.
+exclude = [
+    "embedded-hal-async",
+    "embedded-io-async",
+]

Cargo.toml

@@ -1,14 +1,13 @@
 [workspace]
 resolver = "2"
 
-# CI removes lines containing 'nightly-only' when not building with nightly.
 members = [
     "embedded-hal",
-    "embedded-hal-async",  # nightly-only
+    "embedded-hal-async",
     "embedded-hal-nb",
     "embedded-hal-bus",
     "embedded-can",
     "embedded-io",
-    "embedded-io-async",  # nightly-only
+    "embedded-io-async",
     "embedded-io-adapters",
 ]