ci: actions-rust-lang/setup-rust-toolchain is better

- It uses `rust-toolchain.toml` by default
- Has built-in support for `Swatinem/rust-cache`

.github/workflows/ci.yml

@@ -10,18 +10,12 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Install rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           components: clippy, rustfmt
 
-      - uses: Swatinem/rust-cache@v2
-
-      - name: Install latest just release
-        uses: taiki-e/install-action@just
-
-      - name: Install latest dprint release
-        uses: taiki-e/install-action@dprint
+      - uses: taiki-e/install-action@just
+      - uses: taiki-e/install-action@dprint
 
       - name: Check MSRV
         run: |
@@ -35,6 +29,13 @@ jobs:
               echo "MSRV match"
           fi
 
+      - name: Show version information
+        shell: bash
+        run: |
+          rustc --version
+          cargo --version
+          cargo fmt --version
+
       - name: Ensure `fmt` has been run
         run:  just fmt-check
 
@@ -50,18 +51,10 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Install rust toolchain (v${{ env.MIN_SUPPORTED_RUST_VERSION }})
-        uses: dtolnay/rust-toolchain@master
-        with:
-          toolchain: ${{ env.MIN_SUPPORTED_RUST_VERSION }}
-
-      - uses: Swatinem/rust-cache@v2
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
 
-      - name: Install latest nextest release
-        uses: taiki-e/install-action@nextest
-
-      - name: Install latest just release
-        uses: taiki-e/install-action@just
+      - uses: taiki-e/install-action@nextest
+      - uses: taiki-e/install-action@just
 
       - name: Prepare the environment variables
         run: |
@@ -77,6 +70,12 @@ jobs:
           # Check DB version
           docker exec postgres_db psql -h localhost -p 5432 -U durin --version
 
+      - name: Show version information
+        shell: bash
+        run: |
+          rustc --version
+          cargo --version
+
       - name: Run tests
         env:
           DATABASE_URL: postgres://durin:SpeakFriendAndEnter@localhost:5432/tin
@@ -101,20 +100,15 @@ jobs:
       - name: Checkout source code
         uses: actions/checkout@v3
 
-      - name: Install Rust toolchain
-        uses: dtolnay/rust-toolchain@stable
+      - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           target: ${{ matrix.target }}
 
       - name: Show version information
         shell: bash
         run: |
-          gcc --version || true
-          rustup -V
-          rustup toolchain list
-          rustup default
-          cargo -V
-          rustc -V
+          rustc --version
+          cargo --version
 
       - name: Install musl-tools
         if: matrix.target == 'x86_64-unknown-linux-musl'
@@ -123,10 +117,5 @@ jobs:
           sudo apt-get install -y --no-install-recommends \
             --allow-unauthenticated musl-tools
 
-      - name: Rust cache
-        uses: Swatinem/rust-cache@v2
-        with:
-          key: ${{ matrix.os }}-${{ matrix.target }}
-
       - name: Build
         run: cargo build --release --locked --target ${{ matrix.target }}

rust-toolchain.toml

@@ -0,0 +1,3 @@
+[toolchain]
+channel = "stable"
+components = ["rustfmt", "clippy"]