build: upload windows binaries directly to gcp

.github/workflows/build.yml

@@ -153,3 +153,36 @@ jobs:
 
       - run: mingw32-make build/urbit
       - run: build/urbit -l -d -B ../../bin/solid.pill -F bus && curl -f --data '{"source":{"dojo":"+hood/exit"},"sink":{"app":"hood"}}' http://localhost:12321
+
+      - uses: actions/setup-python@v2
+        if: ${{ env.DO_UPLOAD == 'true' }}
+        with:
+          python-version: 3.7
+
+      - uses: google-github-actions/setup-gcloud@v0.6.0
+        if: ${{ env.DO_UPLOAD == 'true' }}
+        env:
+          # see https://github.com/google-github-actions/setup-gcloud/issues/100
+          CLOUDSDK_PYTHON: ${{env.pythonLocation}}\python.exe
+        with:
+          service_account_key: ${{ secrets.GCS_SERVICE_ACCOUNT_KEY }}
+          project_id: ${{ secrets.GCS_PROJECT }}
+          export_default_credentials: true
+
+      - name: upload binary to bootstrap.urbit.org
+        if: ${{ env.DO_UPLOAD == 'true' }}
+        env:
+          CLOUDSDK_PYTHON: ${{env.pythonLocation}}\python.exe
+        shell: bash
+        run: |
+          version="$(cat ./version)"
+          system="x86_64-windows"
+          target="gs://bootstrap.urbit.org/ci/vere/often/${GITHUB_SHA:0:9}/vere-v${version}-${system}.exe"
+
+          gsutil cp -n ./build/urbit.exe "$target"
+          exitcode=$?
+
+          test $exitcode -eq 0 &&
+            echo "upload to $target complete." ||
+            echo "upload to $target failed.";
+          exit $exitcode