Publish relay releases from github actions (#3669)

Summary:
We already publishing all versions as `main` to NPM. Let's also integrate this process with our tags that we're using for releases.

- For all pushed commits to the `main` branch everything stays the same
- If a new tag is published, the action will build a release version (using a tag name)
- if GitHub tag contains `-rc.` suffix, `--tag=dev` will be used during `npm publish`.

Pull Request resolved: #3669

Test Plan:
Tested in different repo:
- verified that pushes to `main` repo published with `RELEASE_COMMIT_SHA`
- verified that `git push --tags` triggering `Build release version` job
- verified that `publish to npm` works and passed `--main` tag for pushes to `main` branch. `--dev` tag for tag pushes with `-rc.` string in the version, no tags for other versions

Verified locally:

  npm_package_version=v13.0.0-rc.0 yarn gulp release

works.

**Static Docs Preview: relay**
|[Full Site](https://our.intern.facebook.com/intern/staticdocs/eph/1638559587/relay/)|

|**Modified Pages**|

Reviewed By: rbalicki2

Differential Revision: D32835517

Pulled By: alunyov

fbshipit-source-id: 15d207214216c4cf5aba3f36bfd0595cdd83119c

.github/workflows/ci.yml

@@ -107,7 +107,7 @@ jobs:
   main-release:
     name: Publish main tag to npm
     runs-on: ubuntu-latest
-    if: github.event_name == 'push' && github.repository == 'facebook/relay' && github.ref == 'refs/heads/main'
+    if: github.event_name == 'push' && github.repository == 'facebook/relay'
     needs: [js-tests, js-lint, typecheck, rust-tests, build-compiler]
     steps:
       - uses: actions/checkout@v2
@@ -138,12 +138,23 @@ jobs:
         run: |
           chmod +x linux-x64/relay
           chmod +x macos-x64/relay
-      - name: Build main version
-        run:  RELEASE_COMMIT_SHA=${{github.sha}} yarn gulp mainrelease
+
+      - name: Build latest (main) version
+        if: github.ref == 'refs/heads/main'
+        run: yarn gulp mainrelease
+        env:
+          RELEASE_COMMIT_SHA: ${{ github.sha }}
+
+      - name: Build release version
+        if: github.ref_type == 'tag' && startsWith(github.ref_name, 'v')
+        run: yarn gulp release
+
       - name: Publish to npm
+        if: github.ref == 'refs/heads/main' || github.ref_type == 'tag' && startsWith(github.ref_name, 'v')
         run: |
           for pkg in dist/*; do
-            npm publish "$pkg" --tag main
+            npm publish "$pkg" ${TAG}
           done
         env:
+          TAG: ${{ github.ref == 'refs/heads/main' && '--tag=main' || ((github.ref_type == 'tag' && startsWith(github.ref_name, 'v') && contains(github.ref_name, '-rc.') && '--tag=dev') || '' )}}
           NODE_AUTH_TOKEN: ${{secrets.NPM_TOKEN}}

gulpfile.js

@@ -404,5 +404,6 @@ exports.clean = clean;
 exports.dist = dist;
 exports.watch = watch;
 exports.mainrelease = gulp.series(cleanbuild, relayCompiler, setMainVersion);
+exports.release = gulp.series(cleanbuild, relayCompiler);
 exports.cleanbuild = cleanbuild;
 exports.default = cleanbuild;