feat: add linear GitHub Actions CI

.github/workflows/ci.yml

@@ -0,0 +1,125 @@
+name: CI
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+
+permissions:
+  contents: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.pull_request.number || github.ref }}
+  cancel-in-progress: true
+
+env:
+  CARGO_TERM_COLOR: always
+
+jobs:
+  format:
+    name: Check formatting
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: rustfmt
+
+      - name: Check formatting
+        run: cargo fmt --all -- --check
+
+  clippy:
+    name: Clippy lints
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    needs: [format]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          components: clippy
+
+      - name: Cache Cargo dependencies
+        uses: swatinem/rust-cache@v2
+
+      - name: Run Clippy
+        run: cargo clippy --all-targets --all-features -- -D warnings
+
+  test:
+    name: Test
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    needs: [clippy]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Cargo dependencies
+        uses: swatinem/rust-cache@v2
+
+      - name: Run tests
+        run: cargo test --all-targets --all-features
+
+  build:
+    name: Build
+    runs-on: ubuntu-latest
+    timeout-minutes: 20
+    needs: [test]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Cache Cargo dependencies
+        uses: swatinem/rust-cache@v2
+
+      - name: Build release binary
+        run: cargo build --release --bin qmtacp
+
+      - name: Smoke CLI help
+        run: ./target/release/qmtacp --help
+
+  nix:
+    name: Nix
+    runs-on: ubuntu-latest
+    timeout-minutes: 30
+    needs: [build]
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v6
+        with:
+          persist-credentials: false
+
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@main
+
+      - name: Enable Nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@main
+        with:
+          use-flakehub: false
+
+      - name: Check Nix formatting
+        run: nix run nixpkgs#alejandra -- --check .
+
+      - name: Test in flake devShell
+        run: nix develop --command cargo test --all-targets --all-features