🔧 Optimize CI workflow with artifact caching and sharing

Enhance CI pipeline efficiency through artifact management and caching

- Add environment variables for consistent Cargo behavior
- Implement shared artifact strategy between jobs using upload/download
- Configure explicit cache keys for better cache hit rates
- Add build artifact retention and error handling policies
- Reuse compiled binaries across workflow steps to reduce build time
- Update Docker build process to leverage pre-built artifacts

This significantly improves CI performance by avoiding redundant
compilation steps and sharing build artifacts between workflow stages.

Author: hyperb1iss

.github/workflows/cicd.yml

@@ -13,6 +13,10 @@ on:
     branches:
       - main # Trigger on pull requests to main branch
 
+env:
+  CARGO_TERM_COLOR: always
+  CARGO_INCREMENTAL: 0
+
 jobs:
   # This job runs for all pushes and pull requests
   build-and-test:
@@ -40,15 +44,23 @@ jobs:
       - name: 📦 Rust cache
         uses: Swatinem/rust-cache@v2
         with:
-          # Let action generate cache keys automatically
-          workspaces: ". -> target"
+          shared-key: "build-${{ matrix.target }}"
+          save-if: ${{ github.ref == 'refs/heads/main' || startsWith(github.ref, 'refs/tags/') }}
 
       - name: 🔨 Build
         run: |
           echo "::group::Building Git-Iris (${{ matrix.build }})"
           ${{ matrix.cmd }} build --verbose --locked --target ${{ matrix.target }}
           echo "::endgroup::"
 
+      - name: 📤 Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-${{ matrix.build }}
+          path: ./target/${{ matrix.target }}/debug
+          if-no-files-found: error
+          retention-days: 1
+
       - name: 🧪 Run tests
         run: |
           echo "::group::Running tests (${{ matrix.build }})"
@@ -68,14 +80,20 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 📥 Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: build-linux-amd64
+          path: ./target/x86_64-unknown-linux-gnu/debug
+
       - name: 🔍 Set up Docker Buildx
         uses: docker/setup-buildx-action@v3
 
       - name: 🔨 Build Docker image
         working-directory: ./docker
         run: |
           echo "::group::Building Docker image"
-          ./build.sh $IMAGE_NAME
+          CARGO_TARGET_DIR=../target ./build.sh $IMAGE_NAME
           echo "::endgroup::"
 
       - name: 🧪 Test Docker image
@@ -116,6 +134,13 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 📥 Download debug artifacts if available
+        uses: actions/download-artifact@v4
+        continue-on-error: true
+        with:
+          name: build-${{ matrix.build }}
+          path: ./target/${{ matrix.target }}/debug
+
       - name: 🦀 Install Rust
         uses: dtolnay/rust-toolchain@stable
         with:
@@ -124,17 +149,23 @@ jobs:
       - name: 📦 Rust cache
         uses: Swatinem/rust-cache@v2
         with:
-          # Let action generate cache keys automatically
-          workspaces: ". -> target/${{ matrix.target }}/release"
-          # Additional cache suffix for release builds
-          cache-on-failure: true
+          shared-key: "release-${{ matrix.target }}"
+          save-if: true
 
       - name: 🔨 Build release binary
         run: |
           echo "::group::Building release binary (${{ matrix.build }})"
           cargo build --verbose --locked --release --target ${{ matrix.target }}
           echo "::endgroup::"
 
+      - name: 📤 Upload release artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: release-${{ matrix.build }}
+          path: ./target/${{ matrix.target }}/release
+          if-no-files-found: error
+          retention-days: 1
+
       - name: 📤 Upload artifact
         uses: actions/upload-artifact@v4
         with:
@@ -156,6 +187,12 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 📥 Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: build-linux-amd64
+          path: ./target/x86_64-unknown-linux-gnu/debug
+
       - name: 🏷️ Get version
         id: get_version
         run: echo "VERSION=${GITHUB_REF_NAME#v}" >> $GITHUB_OUTPUT
@@ -168,9 +205,8 @@ jobs:
       - name: 📦 Rust cache
         uses: Swatinem/rust-cache@v2
         with:
-          # Let action generate cache keys automatically
-          workspaces: "."
-          cache-on-failure: true
+          shared-key: "packages-x86_64-unknown-linux-gnu"
+          save-if: true
 
       # Build DEB package
       - name: 📦 Install cargo-deb
@@ -235,6 +271,12 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 📥 Download release artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: release-linux-amd64
+          path: ./target/x86_64-unknown-linux-gnu/release
+
       - name: 🏷️ Get version
         id: get_version
         run: |
@@ -262,6 +304,8 @@ jobs:
             ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:${{ steps.get_version.outputs.VERSION }}
           cache-from: type=gha
           cache-to: type=gha,mode=max
+          build-args: |
+            CARGO_TARGET_DIR=./target
 
       - name: 🎉 Docker image published
         run: |
@@ -281,11 +325,19 @@ jobs:
         with:
           fetch-depth: 0
 
+      - name: 📥 Download release artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: release-linux-amd64
+          path: ./target/x86_64-unknown-linux-gnu/release
+
       - name: 🦀 Install Rust
         uses: dtolnay/rust-toolchain@stable
 
       - name: 📦 Rust cache
         uses: Swatinem/rust-cache@v2
+        with:
+          shared-key: "publish"
 
       - name: 🔑 Setup crates.io token
         run: cargo login ${{ secrets.CRATES_IO_TOKEN }}
@@ -331,15 +383,15 @@ jobs:
         run: |
           echo "::group::Generating release notes"
           if [ -n "$OPENAI_API_KEY" ]; then
-            # Build git-iris locally to generate release notes
-            cargo build --release
+            # Use downloaded release binary to generate release notes
+            chmod +x ./artifacts/git-iris-linux-amd64/git-iris
             
             # Get previous tag
             PREVIOUS_TAG=$(git describe --tags --abbrev=0 HEAD^ 2>/dev/null || echo "")
             
             if [ -n "$PREVIOUS_TAG" ]; then
               # Generate release notes using git-iris
-              ./target/release/git-iris release-notes --from "$PREVIOUS_TAG" --to "$GITHUB_REF_NAME" --print > RELEASE_NOTES.md
+              ./artifacts/git-iris-linux-amd64/git-iris release-notes --from "$PREVIOUS_TAG" --to "$GITHUB_REF_NAME" --print > RELEASE_NOTES.md
               echo "✨ Generated release notes with git-iris"
             else
               echo "No previous tag found, using default release notes"