experiment with CI

.github/workflows/ci.yml

@@ -1,3 +1,5 @@
+name: Continuous integration
+
 on:
   push:
     branches:
@@ -6,29 +8,63 @@ on:
     branches:
     - master
 
-name: Continuous integration
+env:
+  RUSTFLAGS: -Dwarnings
+  RUST_BACKTRACE: short
+
+  CARGO_INCREMENTAL: 0
+  CARGO_NET_RETRY: 10
+  RUSTUP_MAX_RETRIES: 10
+
+  rust_nightly: nightly-2022-01-17
+  # When updating this, also update:
+  # - README.md
+  # - src/lib.rs
+  # - down below in a matrix
+  rust_msrv: 1.58.0
 
 jobs:
-  style:
+  # Depends on all action that are required for a "successful" CI run.
+  ci-pass:
+    name: CI succeeded
+    runs-on: ubuntu-latest
+
+    needs:
+      - fmt
+      - test
+      - check-examples
+      - clippy
+
+    steps:
+      - run: exit 0
+
+  fmt:
+    name: fmt
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - name: Checkout
+        uses: actions/checkout@v3
 
-      - uses: actions-rs/toolchain@v1
+      - name: Install Rust ${{ env.rust_nightly }}
+        uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly-2022-01-17
+          toolchain: ${{ env.rust_nightly }}
           override: true
           components: rustfmt
 
-      - name: fmt
+      - name: Cache Dependencies
+        uses: Swatinem/rust-cache@v1
+
+      - name: Check formatting
         uses: actions-rs/cargo@v1
         with:
           command: fmt
-          args: --all -- --check 
+          args: --all -- --check
 
   test:
+    name: Test
     runs-on: ubuntu-latest
     strategy:
       matrix:
@@ -49,45 +85,79 @@ jobs:
             toolchain: nightly-2022-01-17
             features: "--all-features"
           - rust: msrv
+            toolchain: 1.58.0
             features: "--features full"
-            toolchain: "1.58.0"
 
-    steps:
-      - uses: actions/checkout@v1
-        
-      - uses: actions-rs/toolchain@v1
+    steps:      
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install Rust ${{ matrix.toolchain }}
+        uses: actions-rs/toolchain@v1
         with:
           profile: minimal
           toolchain: ${{ matrix.toolchain }}
           override: true
-      
-      - name: build 
+
+      - name: Cache Dependencies
+        uses: Swatinem/rust-cache@v1
+
+      - name: Compile 
         uses: actions-rs/cargo@v1
         with:
-          command: build
-          args: --verbose ${{ matrix.features }}
+          command: test
+          args: --no-run --verbose ${{ matrix.features }}
       
-      - name: test 
+      - name: Test
         uses: actions-rs/cargo@v1
         with:
           command: test
           args: --verbose ${{ matrix.features }}
 
-  clippy:
+  check-examples:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v1
+      - name: Checkout
+        uses: actions/checkout@v3
 
-      - uses: actions-rs/toolchain@v1
+      - name: Install Rust stable
+        uses: actions-rs/toolchain@v1
         with:
           profile: minimal
-          toolchain: nightly-2022-01-17
+          toolchain: stable
+          override: true
+
+      - name: Cache Dependencies
+        uses: Swatinem/rust-cache@v1
+
+      - name: Check examples
+        uses: actions-rs/cargo@v1
+        with:
+          command: check
+          args: --examples --features full
+
+  clippy:
+    name: Run linter
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+
+      - name: Install Rust ${{ env.rust_nightly }}
+        uses: actions-rs/toolchain@v1
+        with:
+          profile: minimal
+          toolchain: ${{ env.rust_nightly }}
           override: true
           components: clippy
 
+      - name: Cache Dependencies
+        uses: Swatinem/rust-cache@v1
+
       - name: clippy
         uses: actions-rs/cargo@v1
         with:
           command: clippy
-          args: --all-targets --all-features -- -D warnings
+          args: --all-targets --all-features