#109 refactor: split CI into logical jobs for better visibility

Author: RAprogramm

.github/workflows/reusable-ci.yml

@@ -8,17 +8,39 @@ on:
         default: true
 
 jobs:
-  ci:
+  # 📋 Code Quality Checks
+  code-quality:
+    name: Code Quality
     runs-on: ubuntu-latest
     env:
-      CARGO_LOCKED: "true"   # don't mutate Cargo.lock during CI
       CARGO_TERM_COLOR: always
     steps:
       - uses: actions/checkout@v5
         with:
           fetch-depth: 0
 
-      # Read MSRV (rust-version) from Cargo.toml
+      - name: Install nightly rustfmt
+        uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: nightly-2025-08-01
+          components: rustfmt
+
+      - name: Check formatting
+        run: cargo +nightly-2025-08-01 fmt --all -- --check
+
+      - name: REUSE Compliance
+        uses: fsfe/reuse-action@v5
+
+  # 🔍 Linting
+  clippy:
+    name: Clippy (MSRV)
+    runs-on: ubuntu-latest
+    env:
+      CARGO_LOCKED: "true"
+      CARGO_TERM_COLOR: always
+    steps:
+      - uses: actions/checkout@v5
+
       - name: Read MSRV from Cargo.toml
         id: msrv
         shell: bash
@@ -36,54 +58,79 @@ jobs:
           echo "msrv=${RV}" >> "$GITHUB_OUTPUT"
           echo "Using MSRV: $RV"
 
-      # Install MSRV for clippy/tests/package
       - name: Install Rust (${{ steps.msrv.outputs.msrv }})
         uses: dtolnay/rust-toolchain@v1
         with:
           toolchain: ${{ steps.msrv.outputs.msrv }}
           components: clippy
 
-      # Pin nightly for rustfmt because unstable_features = true in .rustfmt.toml
-      - name: Install nightly rustfmt
-        uses: dtolnay/rust-toolchain@v1
-        with:
-          toolchain: nightly-2025-08-01
-          components: rustfmt
-
       - name: Cache cargo
         uses: Swatinem/rust-cache@v2
         with:
           save-if: ${{ github.ref == 'refs/heads/main' }}
 
-      # Ensure Cargo.lock is present when CARGO_LOCKED=1
-      - name: Verify lockfile is committed
+      - name: Run clippy
         shell: bash
         run: |
           set -euo pipefail
-          if [ ! -f Cargo.lock ]; then
-            echo "CARGO_LOCKED=1 but Cargo.lock is missing. Commit it or drop CARGO_LOCKED."
+          if [ "${{ inputs.all-features }}" = "true" ]; then
+            cargo +${{ steps.msrv.outputs.msrv }} clippy --workspace --all-targets --all-features -- -D warnings
+          else
+            cargo +${{ steps.msrv.outputs.msrv }} clippy --workspace --all-targets -- -D warnings
+          fi
+
+  # 🧪 Tests
+  test:
+    name: Tests (MSRV)
+    runs-on: ubuntu-latest
+    env:
+      CARGO_LOCKED: "true"
+      CARGO_TERM_COLOR: always
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Read MSRV from Cargo.toml
+        id: msrv
+        shell: bash
+        run: |
+          set -euo pipefail
+          if ! command -v jq >/dev/null 2>&1; then
+            sudo apt-get update -y && sudo apt-get install -y jq
+          fi
+          RV=$(cargo metadata --no-deps --format-version=1 | jq -r '.packages[0].rust_version // empty')
+          if [ -z "$RV" ]; then
+            echo "rust-version is not set in Cargo.toml"
             exit 1
           fi
+          [[ "$RV" =~ ^[0-9]+\.[0-9]+$ ]] && RV="${RV}.0"
+          echo "msrv=${RV}" >> "$GITHUB_OUTPUT"
+          echo "Using MSRV: $RV"
 
-      - name: Check formatting (nightly rustfmt)
-        run: cargo +nightly-2025-08-01 fmt --all -- --check
+      - name: Install Rust (${{ steps.msrv.outputs.msrv }})
+        uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: ${{ steps.msrv.outputs.msrv }}
 
-      - name: Clippy (MSRV)
+      - name: Cache cargo
+        uses: Swatinem/rust-cache@v2
+        with:
+          save-if: ${{ github.ref == 'refs/heads/main' }}
+
+      - name: Verify lockfile is committed
         shell: bash
         run: |
           set -euo pipefail
-          if [ "${{ inputs.all-features }}" = "true" ]; then
-            cargo +${{ steps.msrv.outputs.msrv }} clippy --workspace --all-targets --all-features -- -D warnings
-          else
-            cargo +${{ steps.msrv.outputs.msrv }} clippy --workspace --all-targets -- -D warnings
+          if [ ! -f Cargo.lock ]; then
+            echo "CARGO_LOCKED=1 but Cargo.lock is missing. Commit it or drop CARGO_LOCKED."
+            exit 1
           fi
 
       - name: Install cargo-nextest
         uses: taiki-e/install-action@v2
         with:
           tool: cargo-nextest
 
-      - name: Tests (MSRV)
+      - name: Run tests
         shell: bash
         run: |
           set -euo pipefail
@@ -99,18 +146,53 @@ jobs:
         with:
           token: ${{ secrets.CODECOV_TOKEN }}
 
-          
-      - name: Auto-commit changes (any branch)
+  # 📦 Build & Package
+  build:
+    name: Build & Package
+    runs-on: ubuntu-latest
+    needs: [code-quality, clippy, test]
+    env:
+      CARGO_LOCKED: "true"
+      CARGO_TERM_COLOR: always
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Read MSRV from Cargo.toml
+        id: msrv
+        shell: bash
+        run: |
+          set -euo pipefail
+          if ! command -v jq >/dev/null 2>&1; then
+            sudo apt-get update -y && sudo apt-get install -y jq
+          fi
+          RV=$(cargo metadata --no-deps --format-version=1 | jq -r '.packages[0].rust_version // empty')
+          if [ -z "$RV" ]; then
+            echo "rust-version is not set in Cargo.toml"
+            exit 1
+          fi
+          [[ "$RV" =~ ^[0-9]+\.[0-9]+$ ]] && RV="${RV}.0"
+          echo "msrv=${RV}" >> "$GITHUB_OUTPUT"
+          echo "Using MSRV: $RV"
+
+      - name: Install Rust (${{ steps.msrv.outputs.msrv }})
+        uses: dtolnay/rust-toolchain@v1
+        with:
+          toolchain: ${{ steps.msrv.outputs.msrv }}
+
+      - name: Cache cargo
+        uses: Swatinem/rust-cache@v2
+
+      - name: Auto-commit changes
         if: always()
         run: |
           set -euo pipefail
-            git config user.name  "github-actions[bot]"
-            git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-            git config --global --add safe.directory "$GITHUB_WORKSPACE"
-            git add .
-            git commit -m "chore(readme): auto-refresh [skip ci]" || true
+          git config user.name  "github-actions[bot]"
+          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
+          git config --global --add safe.directory "$GITHUB_WORKSPACE"
+          git add .
+          git commit -m "chore(readme): auto-refresh [skip ci]" || true
 
-      - name: Ensure tree is clean before package
+      - name: Ensure tree is clean
         shell: bash
         run: |
           set -euo pipefail
@@ -123,10 +205,9 @@ jobs:
       - name: Package (dry-run)
         run: cargo +${{ steps.msrv.outputs.msrv }} package --locked
 
-      - name: REUSE Compliance
-        uses: fsfe/reuse-action@v5
-
+  # 📊 Coverage
   coverage:
+    name: Coverage
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v5