GitHub workflow attempt #1

.github/workflows/pr-validation.yml

@@ -0,0 +1,65 @@
+name: PR Validation
+on:
+  pull_request:
+    branches:
+      - main
+
+jobs:
+  checkout-repo:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Ensure unambiguous `main`
+        if: github.ref != 'refs/heads/main'
+        run: |
+          git remote set-branches origin main
+          git fetch --depth 1 origin main
+          git branch main origin/main
+
+  setup-rust:
+    runs-on: ubuntu-latest
+    needs: checkout-repo
+    steps:
+      - uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+      - uses: dtolnay/rust-toolchain@nightly
+        with:
+          components: rustfmt
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.os }}-setup-rust-${{ hashFiles('**/Cargo.toml') }}
+      - name: Set default Rust toolchain
+        run: rustup default stable
+      - name: Verify Rust setup
+        run: rustup show
+
+  setup-node:
+    runs-on: ubuntu-latest
+    needs: checkout-repo
+    steps:
+      - uses: actions/setup-node@v4
+        with:
+          node-version: 20
+          cache: npm
+      - uses: actions/cache@v4
+        with:
+          path: node_modules/
+          key: ${{ runner.os }}-setup-node-${{ hashFiles('**/package.json', '**/package-lock.json') }}
+      - name: Install node dependencies
+        run: npm ci
+
+  validate-affected:
+    runs-on: ubuntu-latest
+    needs:
+      - setup-rust
+      - setup-node
+    steps:
+      - name: nx affected
+        run: npx nx affected -t format lint test --configuration ci