Automate release process for v*.*.* tags.

Author: manyfacedqod

.github/workflows/release.yml

@@ -0,0 +1,65 @@
+name: Build and Release
+
+on:
+  push:
+    tags:
+      - 'v*.*.*' # e.g. v1.1.1, v2.0.0
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    strategy:
+      matrix:
+        os: [linux, macos, windows]
+        arch: [amd64]
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v3
+
+      - name: Set up Go
+        uses: actions/setup-go@v4
+        with:
+          go-version: '1.20'
+
+      - name: Build binary
+        run: |
+          mkdir -p dist/${{ matrix.os }}
+          if [[ "${{ matrix.os }}" == "linux" ]]; then
+            GOOS=linux   GOARCH=${{ matrix.arch }} CGO_ENABLED=0 \
+              go build -ldflags="-s -w" -o dist/linux/smartcommit-linux .
+          elif [[ "${{ matrix.os }}" == "macos" ]]; then
+            GOOS=darwin  GOARCH=${{ matrix.arch }} CGO_ENABLED=0 \
+              go build -ldflags="-s -w" -o dist/macos/smartcommit-macos .
+          else
+            GOOS=windows GOARCH=${{ matrix.arch }} CGO_ENABLED=0 \
+              go build -ldflags="-s -w" -o dist/windows/smartcommit-windows.exe .
+          fi
+
+      - name: Package archives
+        run: |
+          if [[ "${{ matrix.os }}" == "linux" ]]; then
+            tar -czvf dist/smartcommit-linux.tar.gz -C dist/linux smartcommit-linux
+          elif [[ "${{ matrix.os }}" == "macos" ]]; then
+            tar -czvf dist/smartcommit-macos.tar.gz -C dist/macos smartcommit-macos
+          else
+            tar -czvf dist/smartcommit-windows.tar.gz -C dist/windows smartcommit-windows.exe
+          fi
+
+      - name: Create GitHub Release
+        id: create_release
+        uses: softprops/action-gh-release@v1
+        with:
+          tag_name: ${{ github.ref_name }}
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Upload Release Assets
+        uses: softprops/action-gh-release@v1
+        with:
+          files: |
+            dist/smartcommit-linux.tar.gz
+            dist/smartcommit-macos.tar.gz
+            dist/smartcommit-windows.tar.gz
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}