ci: add release workflow (multi-platform binaries + crates.io publish)

.github/workflows/release.yml

@@ -0,0 +1,95 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+jobs:
+  build:
+    name: Build ${{ matrix.archive }}
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix:
+        include:
+          - os: ubuntu-latest
+            target: x86_64-unknown-linux-gnu
+            archive: steplock-Linux-x86_64
+          - os: macos-latest
+            target: aarch64-apple-darwin
+            archive: steplock-Darwin-arm64
+          - os: macos-13
+            target: x86_64-apple-darwin
+            archive: steplock-Darwin-x86_64
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+        with:
+          targets: ${{ matrix.target }}
+
+      - name: Cache cargo registry
+        uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            core/target
+          key: ${{ runner.os }}-${{ matrix.target }}-cargo-release-${{ hashFiles('core/Cargo.lock') }}
+          restore-keys: |
+            ${{ runner.os }}-${{ matrix.target }}-cargo-release-
+
+      - name: Build
+        run: cargo build --manifest-path core/Cargo.toml --release --target ${{ matrix.target }}
+
+      - name: Package
+        run: |
+          cd core/target/${{ matrix.target }}/release
+          tar -czf "${{ matrix.archive }}.tar.gz" steplock
+          mv "${{ matrix.archive }}.tar.gz" ../../../../
+
+      - name: Upload artifact
+        uses: actions/upload-artifact@v4
+        with:
+          name: ${{ matrix.archive }}
+          path: ${{ matrix.archive }}.tar.gz
+
+  release:
+    name: Create GitHub Release
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Download artifacts
+        uses: actions/download-artifact@v4
+        with:
+          path: artifacts
+          merge-multiple: true
+
+      - name: Create release
+        run: |
+          gh release create "${{ github.ref_name }}" \
+            --title "${{ github.ref_name }}" \
+            --generate-notes \
+            artifacts/*.tar.gz
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+  publish:
+    name: Publish to crates.io
+    needs: release
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Install Rust stable
+        uses: dtolnay/rust-toolchain@stable
+
+      - name: Publish crate
+        run: cargo publish --manifest-path core/Cargo.toml
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CARGO_REGISTRY_TOKEN }}