[ci] use GitHub Actions to build documentation site

Signed-off-by: Gary Guo <[email protected]>
(cherry picked from commit 26f1bff)

.github/workflows/ci.yml

@@ -125,6 +125,8 @@ jobs:
     name: Build documentation
     runs-on: ubuntu-22.04
     needs: quick_lint
+    env:
+      BUCKET: gold-hybrid-255313-prod
     steps:
       - uses: actions/checkout@v4
         with:
@@ -134,7 +136,32 @@ jobs:
         with:
           service_account_json: '${{ secrets.BAZEL_CACHE_CREDS }}'
       - name: Build documentation
-        run: ./ci/scripts/build-docs.sh
+        run: util/site/build-docs.sh build
+      - name: Upload files
+        if: ${{ github.event_name != 'pull_request' && github.ref_name == 'earlgrey_1.0.0' }}
+        run: |
+          echo "::group::Upload all uncompressed files"
+          gcloud storage cp -R --gzip-in-flight=js,css,html "build-site/*" gs://$BUCKET/earlgrey_1.0.0
+          echo "::endgroup::"
+
+          # This script compresses the searchindex files, replacing the originals in-place.
+          # (This is how 'content-encoding'-tagged files should be uploaded to gcloud buckets)
+          util/site/post-build.sh compress_br
+
+          search_indexes=$(find build-site/ -type f -name '*searchindex.json')
+          for f in $search_indexes; do
+              echo "Uploading compressed file ${f}"
+              # Get directory of file, relative to the build directory.
+              # - var=${var#*//} # removes stuff from the begining up to //
+              dir=$(dirname "${f#*build-site/}")
+              # When serving from gcloud buckets, file should be uploaded with an identical name as the
+              # original, but compressed and with the matching 'content-encoding' and 'content-type' tags applied.
+              gcloud storage cp \
+                     --content-encoding=br \
+                     --content-type=application/json \
+                     -R \
+                     "$f" "gs://$BUCKET/earlgrey_1.0.0/${dir}/"
+          done
 
   airgapped_build:
     name: Airgapped build