ci: add MSRV lint job (#5495)

.github/workflows/lint.yml

@@ -32,6 +32,29 @@ jobs:
         env:
           RUSTFLAGS: -D warnings
 
+  msrv:
+    name: MSRV / ${{ matrix.network }}
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    strategy:
+      matrix:
+        include:
+          - binary: reth
+            network: ethereum
+          - binary: op-reth
+            network: optimism
+    steps:
+      - uses: actions/checkout@v4
+      - uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: "1.70" # MSRV
+      - uses: Swatinem/rust-cache@v2
+        with:
+          cache-on-failure: true
+      - run: cargo build --bin "${{ matrix.binary }}" --workspace --features "${{ matrix.network }}"
+        env:
+          RUSTFLAGS: -D warnings
+
   docs:
     name: docs
     runs-on: ubuntu-latest

Cargo.toml

@@ -64,7 +64,7 @@ resolver = "2"
 [workspace.package]
 version = "0.1.0-alpha.10"
 edition = "2021"
-rust-version = "1.70" # Remember to update clippy.toml and README.md
+rust-version = "1.70"
 license = "MIT OR Apache-2.0"
 homepage = "https://paradigmxyz.github.io/reth"
 repository = "https://github.com/paradigmxyz/reth"

README.md

@@ -73,6 +73,13 @@ If you want to contribute, or follow along with contributor discussion, you can
 
 ### Building and testing
 
+<!--
+When updating this, also update:
+- clippy.toml
+- Cargo.toml
+- .github/workflows/lint.yml
+-->
+
 The Minimum Supported Rust Version (MSRV) of this project is [1.70.0](https://blog.rust-lang.org/2023/06/01/Rust-1.70.0.html).
 
 See the book for detailed instructions on how to [build from source](https://paradigmxyz.github.io/reth/installation/source.html).