Merge pull request #184488 from Homebrew/dispatch-bottle-check

workflows/dispatch-build-bottle: check for an existing bottle

.github/workflows/dispatch-build-bottle.yml

@@ -114,6 +114,24 @@ jobs:
           bottles-directory: ${{ env.BOTTLES_DIR }}
           cleanup: ${{ matrix.cleanup }}
 
+      - name: Check for existing bottle
+        shell: brew ruby {0}
+        env:
+          HOMEBREW_DISPATCHED_FORMULA: ${{ inputs.formula }}
+        run: |
+          formula_name = ENV.fetch("HOMEBREW_DISPATCHED_FORMULA")
+          formula = Formulary.factory(formula_name)
+          current_bottle_tag = Utils::Bottles.tag
+          bottled_on_current_os = formula.bottle_specification.tag?(current_bottle_tag, no_older_versions: true)
+
+          return unless bottled_on_current_os
+
+          puts GitHub::Actions::Annotation.new(
+            :error,
+            "#{formula_name} already has a bottle for #{current_bottle_tag}!",
+          )
+          exit 1
+
       - working-directory: ${{ env.BOTTLES_DIR }}
         run: |
           brew test-bot \