build: adds automation for brew releases (grafana#2348)

.github/workflows/release.yml

@@ -63,3 +63,22 @@ jobs:
           # Your GoReleaser Pro key, if you are using the 'goreleaser-pro'
           # distribution:
           # GORELEASER_KEY: ${{ secrets.GORELEASER_KEY }}
+
+      # make generate-formulas expects PYROSCOPE_TAG to be set
+      - name: Set PYROSCOPE_TAG
+        run: echo "PYROSCOPE_TAG=${GITHUB_REF#refs/*/}" >> $GITHUB_ENV
+      - name: Get github app token (valid for an hour)
+        id: brew-token
+        uses: tibdex/github-app-token@v1
+        with:
+          app_id: ${{ secrets.APP_ID }}
+          private_key: ${{ secrets.APP_PRIVATE_KEY }}
+          repository: pyroscope-io/homebrew-brew
+      - name: Deploy to fire-dev-001
+        run: |
+          git config --global url."https://x-access-token:$(echo "${GITHUB_TOKEN}" | xargs)@github.com/pyroscope-io/homebrew-brew".insteadOf "https://github.com/pyroscope-io/homebrew-brew"
+          git clone https://github.com/pyroscope-io/homebrew-brew
+          cd homebrew-brew
+          make generate-formulas && git add Formula && git commit -m "chore: update formulas to ${}" && git push origin main
+        env:
+          GITHUB_TOKEN: ${{ steps.brew-token.outputs.token }}