Add GitHub release workflow for cross-platform binary builds

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: mikkeldamsgaard

.github/workflows/release.yml

@@ -0,0 +1,90 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - "release-[0-9]+.[0-9]+.[0-9]+*"
+
+permissions:
+  contents: write
+
+jobs:
+  build:
+    strategy:
+      matrix:
+        include:
+          - target: aarch64-apple-darwin
+            os: macos-latest
+            artifact: ralph-macos-arm64
+          - target: x86_64-apple-darwin
+            os: macos-latest
+            artifact: ralph-macos-x86_64
+          - target: x86_64-pc-windows-msvc
+            os: windows-latest
+            artifact: ralph-windows-x86_64
+          - target: aarch64-pc-windows-msvc
+            os: windows-latest
+            artifact: ralph-windows-arm64
+          - target: x86_64-unknown-linux-gnu
+            os: ubuntu-latest
+            artifact: ralph-linux-x86_64
+          - target: aarch64-unknown-linux-gnu
+            os: ubuntu-latest
+            artifact: ralph-linux-arm64
+
+    runs-on: ${{ matrix.os }}
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Install cross-compilation tools (Linux ARM64)
+        if: matrix.target == 'aarch64-unknown-linux-gnu'
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y gcc-aarch64-linux-gnu
+          echo "CARGO_TARGET_AARCH64_UNKNOWN_LINUX_GNU_LINKER=aarch64-linux-gnu-gcc" >> $GITHUB_ENV
+
+      - name: Build
+        run: cargo build --release --target ${{ matrix.target }} -p ralph-cli
+
+      - name: Prepare artifact (Unix)
+        if: runner.os != 'Windows'
+        run: |
+          cp target/${{ matrix.target }}/release/ralph ${{ matrix.artifact }}
+          chmod +x ${{ matrix.artifact }}
+
+      - name: Prepare artifact (Windows)
+        if: runner.os == 'Windows'
+        run: cp target/${{ matrix.target }}/release/ralph.exe ${{ matrix.artifact }}.exe
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.artifact }}
+          path: ${{ matrix.artifact }}${{ runner.os == 'Windows' && '.exe' || '' }}
+
+  release:
+    needs: build
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Extract version from tag
+        id: version
+        run: echo "version=${GITHUB_REF_NAME#release-}" >> $GITHUB_OUTPUT
+
+      - name: Download all artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+
+      - name: Create GitHub Release
+        uses: softprops/action-gh-release@v2
+        with:
+          name: v${{ steps.version.outputs.version }}
+          generate_release_notes: true
+          files: artifacts/**/*