[ci] Automatically create release when pushing to main

.github/workflows/main.yml

@@ -13,11 +13,72 @@ env:
   OPAL_RPC_CREDENTIALS: ${{ secrets.OPAL_RPC_CREDENTIALS }}
 
 jobs:
-  build-all:
+  check:
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v4
 
       - name: Build
         run: bazel build //...
+
+  publish:
+    runs-on: ubuntu-latest
+    needs:
+      - "check"
+    if: github.ref == 'refs/heads/main'
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Create tag
+        id: "tag"
+        env:
+          GIT_AUTHOR_NAME: "EngFlow"
+          GIT_AUTHOR_EMAIL: "[email protected]"
+          GIT_COMMITTER_NAME: "EngFlow"
+          GIT_COMMITTER_EMAIL: "[email protected]"
+        run: |
+          VERSION="$(date -u '+%Y.%m.%d-%H.%M.%S')"
+          echo "version=${VERSION}" >> "${GITHUB_OUTPUT}"
+
+          # 1. Download `buildozer`
+          curl -o "${RUNNER_TEMP}/buildozer" -L "https://github.com/bazelbuild/buildtools/releases/download/v7.3.1/buildozer-linux-amd64"
+          chmod +x "${RUNNER_TEMP}/buildozer"
+
+          # 2. Update `MODULE.bazel` and commit.
+          "${RUNNER_TEMP}/buildozer" "set version ${VERSION}" "//MODULE.bazel:engflowapis"
+          git add "MODULE.bazel"
+          git commit -m "Release ${VERSION}"
+
+          # 3. Push release tag.
+          git tag "${VERSION}" "HEAD"
+          git push origin "${VERSION}"
+
+          # 4. Create release tarball
+          git archive -o "${RUNNER_TEMP}/archive.tar.gz" "${VERSION}"
+
+      - name: Create GitHub Release
+        id: "create-release"
+        uses: actions/create-release@v1
+        with:
+          tag_name: ${{ steps.tag.outputs.version }}
+          release_name: Release ${{ steps.tag.outputs.version }}
+          body: |
+            # EngFlow APIs ${{ steps.tag.outputs.version }}
+
+            To use this module, please add the following to `MODULE.bazel`:
+
+            ```starlark
+            bazel_dep(name = "engflowapis", version = "${{ steps.tag.outputs.version }}")
+            ```
+          prerelease: true
+
+      - name: Upload Tarball
+        id: upload-release-asset 
+        uses: actions/upload-release-asset@v1
+        with:
+          upload_url: ${{ steps.create-release.outputs.upload_url }}
+          asset_path: ${{ runner.temp }}/archive.tar.gz
+          asset_name: engflowapis-${{ steps.tag.outputs.version }}.tar.gz
+          asset_content_type: "application/gzip"

MODULE.bazel

@@ -1,19 +1,17 @@
 module(
     name = "engflowapis",
-    version = "2024.10.16",
+    version = "HEAD",  # Automatically updated by release pipeline.
 )
 
 bazel_dep(
     name = "rules_proto",
     version = "6.0.2",
 )
-
 bazel_dep(
     name = "protobuf",
     version = "28.2",
     repo_name = "com_google_protobuf",
 )
-
 bazel_dep(
     name = "googleapis",
     version = "0.0.0-20240819-fe8ba054a",