Add a MSRV CI job

.github/workflows/ci.yml

@@ -546,3 +546,12 @@ jobs:
           use-cross: true
           command: check
           args: --target  ${{ matrix.platform.target }} --all --exclude dora-dav1d --exclude dora-rav1e --exclude dora-node-api-python --exclude dora-operator-api-python --exclude dora-ros2-bridge-python
+
+  # copied from https://github.com/rust-lang/cargo/blob/6833aa715d724437dc1247d0166afe314ab6854e/.github/workflows/main.yml#L291
+  msrv:
+    name: "Check for specified `rust-version`"
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: taiki-e/install-action@cargo-hack
+    - run: cargo hack check --all-targets --rust-version --workspace --ignore-private --locked --exclude dora-rav1e --exclude dora-dav1d

node-hub/dora-dav1d/Cargo.toml

@@ -3,6 +3,7 @@ name = "dora-dav1d"
 edition.workspace = true
 license = "BSD-2-Clause"
 version.workspace = true
+rust-version.workspace = true
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 

node-hub/dora-mistral-rs/Cargo.toml

@@ -2,6 +2,7 @@
 name = "dora-mistral-rs"
 version = "0.1.0"
 edition = "2024"
+rust-version.workspace = true
 
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html