Update Actions CI with improved workflow

.github/workflows/ci.yml

@@ -3,41 +3,7 @@ name: CI checks
 on: [push, pull_request]
 
 jobs:
-  
-  lint:
-    name: Lint
-    runs-on: ubuntu-latest
-
-    steps:
-      - uses: actions/checkout@v1
-      - uses: actions-rs/toolchain@v1
-        with:
-          toolchain: 1.45.2
-          override: true
-
-      # Build the code before running cargo fmt
-      - name: cargo build
-        uses: actions-rs/cargo@v1
-        with:
-          command: build
-          args: --all
-
-      # Ensure all code has been formatted with rustfmt
-      - run: rustup component add rustfmt
-      - name: Check formatting
-        uses: actions-rs/cargo@v1
-        with:
-          command: fmt
-          args: --all -- --check --color always
-
-      # Build benchmarks to prevent bitrot
-      - name: Build benchmarks
-        uses: actions-rs/cargo@v1
-        with:
-          command: build
-          args: --all --benches
-
-  build_and_test:
+  test:
     name: Test on ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
@@ -47,18 +13,135 @@ jobs:
         os: [ubuntu-latest]
 
     steps:
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2
       - uses: actions-rs/toolchain@v1
         with:
           toolchain: 1.45.2
           override: true
-      - name: Build tests
-        uses: actions-rs/cargo@v1
-        with:
-          command: build
-          args: --verbose --release --all --tests --all-features
       - name: Run tests
         uses: actions-rs/cargo@v1
         with:
           command: test
-          args: --verbose --release --all
+          args: --verbose --release --all --all-features
+
+  bitrot:
+    name: Bitrot check
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.45.2
+          override: true
+      # Build benchmarks to prevent bitrot
+      - name: Build benchmarks
+        uses: actions-rs/cargo@v1
+        with:
+          command: build
+          args: --all --benches --all-features
+
+  clippy:
+    name: Clippy (1.45.2)
+    timeout-minutes: 30
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: 1.45.2
+          components: clippy
+          override: true
+      - name: Run clippy
+        uses: actions-rs/clippy-check@v1
+        with:
+          name: Clippy (1.45.2)
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --all-features --all-targets -- -D warnings
+
+  clippy-nightly:
+    name: Clippy (nightly)
+    timeout-minutes: 30
+    runs-on: ubuntu-latest
+    continue-on-error: true
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          components: clippy
+          override: true
+      - name: Run Clippy (nightly)
+        uses: actions-rs/clippy-check@v1
+        continue-on-error: true
+        with:
+          name: Clippy (nightly)
+          token: ${{ secrets.GITHUB_TOKEN }}
+          args: --all-features --all-targets -- -W clippy::all
+
+  codecov:
+    name: Code coverage
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      # Use stable for this to ensure that cargo-tarpaulin can be built.
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - name: Install cargo-tarpaulin
+        uses: actions-rs/cargo@v1
+        with:
+          command: install
+          args: cargo-tarpaulin
+      - name: Generate coverage report
+        uses: actions-rs/cargo@v1
+        with:
+          command: tarpaulin
+          args: --all-features --timeout 600 --out Xml
+      - name: Upload coverage to Codecov
+        uses: codecov/codecov-action@v1
+        with:
+          token: ${{secrets.CODECOV_TOKEN}}
+
+  doc-links:
+    name: Intra-doc links
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: nightly
+          override: true
+      - name: cargo fetch
+        uses: actions-rs/cargo@v1
+        with:
+          command: fetch
+
+      # Ensure intra-documentation links all resolve correctly
+      # Requires #![deny(intra_doc_link_resolution_failure)] in crates.
+      - name: Check intra-doc links
+        uses: actions-rs/cargo@v1
+        with:
+          command: doc
+          args: --all --document-private-items
+
+  fmt:
+    name: Rustfmt
+    timeout-minutes: 30
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions-rs/toolchain@v1
+        with:
+          toolchain: stable
+          override: true
+      - run: rustup component add rustfmt
+      - uses: actions-rs/cargo@v1
+        with:
+          command: fmt
+          args: --all -- --check