ci: revise ci and delint

.github/main.yml → .github/workflows/main.yml

@@ -29,11 +29,6 @@ jobs:
             os: windows-latest
             rust: stable
             target: x86_64-pc-windows-msvc
-          - name: msrv
-            os: ubuntu-22.04
-            # sync MSRV with docs: guide/src/guide/installation.md and Cargo.toml
-            rust: 1.88.0
-            target: x86_64-unknown-linux-gnu
     name: ${{ matrix.name }}
     steps:
     - uses: actions/checkout@v5
@@ -42,4 +37,45 @@ jobs:
     - name: Build and run tests
       run: cargo test --workspace --locked --target ${{ matrix.target }}
     - name: Test no default
-      run: cargo test --workspace --no-default-features --target ${{ matrix.target }}
+      run: cargo test --workspace --no-default-features --target ${{ matrix.target }}
+
+  format:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Install Rust
+        run: bash ci/install-rust.sh stable x86_64-unknown-linux-gnu
+      - run: rustup component add rustfmt
+      - run: cargo fmt --check
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v5
+      - name: Install Rust
+        run: bash ci/install-rust.sh stable x86_64-unknown-linux-gnu
+      - run: rustup component add clippy
+      - run: cargo clippy --workspace --all-targets --no-deps -- -D warnings
+
+  build:
+    runs-on: ubuntu-22.04
+    steps:
+    - uses: actions/checkout@v5
+    - name: Install Rust
+      run: bash ci/install-rust.sh stable aarch64-unknown-linux-musl
+    - name: Build
+      run: cargo build --locked --target aarch64-unknown-linux-musl
+
+  success:
+    name: Success gate
+    if: always()
+    needs:
+      - test
+      - format
+      - lint
+      - build
+    runs-on: ubuntu-latest
+    steps:
+      - run: jq --exit-status 'all(.result == "success")' <<< '${{ toJson(needs) }}'
+      - name: Done
+        run: exit 0

.gitignore

@@ -1,6 +1,5 @@
 # Rust build artifacts
 /target/
-Cargo.lock
 
 # IDE
 .vscode/