GitHub CI: Add MSRV action

Author: uklotzde

.github/workflows/msrv.yaml

@@ -0,0 +1,44 @@
+# yaml-language-server: $schema=https://json.schemastore.org/github-workflow
+
+name: msrv
+
+# read-only repo token
+# no access to secrets
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  verify-build:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Install ALSA and Jack dependencies
+        run: |
+          sudo apt-get update && sudo apt-get install -y libasound2-dev libjack-jackd2-dev cmake
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          # Aligned with `rust-version` in `Cargo.toml`
+          # The quoting is required, otherwise versions that end with 0 would be interpreted as a number
+          toolchain: "1.70"
+
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: Generate Cargo.lock
+        run: cargo generate-lockfile
+
+      - name: Rust Cache
+        uses: Swatinem/rust-cache@v2
+        with:
+          # Distinguished by the action name to avoid sharing!
+          shared-key: "msrv"
+
+      - name: Check
+        run: cargo check --verbose --all-targets --all-features

.github/workflows/rust.yaml

@@ -35,6 +35,9 @@ jobs:
       # restore cargo cache from previous runs
       - name: Rust Cache
         uses: Swatinem/rust-cache@v2
+        with:
+          # Distinguished by the action name to avoid sharing!
+          shared-key: "rust"
 
       # check it builds
       - name: Build