Keep Homebrew formula in tap only

Author: lijiuyang.5137

.github/workflows/release.yml

@@ -80,6 +80,7 @@ jobs:
           merge-multiple: true
 
       - name: Generate Homebrew formula
+        if: ${{ env.HOMEBREW_TAP_TOKEN != '' }}
         run: |
           bash scripts/generate-homebrew-formula.sh "${GITHUB_REPOSITORY}" "${GITHUB_REF_NAME}" dist > dist/cctty.rb
 
@@ -91,13 +92,11 @@ jobs:
             gh release upload "${GITHUB_REF_NAME}" \
               dist/*.tar.gz \
               dist/*.sha256 \
-              dist/cctty.rb \
               --clobber
           else
             gh release create "${GITHUB_REF_NAME}" \
               dist/*.tar.gz \
               dist/*.sha256 \
-              dist/cctty.rb \
               --title "cctty ${GITHUB_REF_NAME}" \
               --generate-notes
           fi

README.md

@@ -65,9 +65,7 @@ brew install cctty
 ```
 
 The tap lives at
-[`Pyiner/homebrew-cctty`](https://github.com/Pyiner/homebrew-cctty). Each
-tagged release also attaches the generated formula as `cctty.rb` for auditing
-and manual tap updates.
+[`Pyiner/homebrew-cctty`](https://github.com/Pyiner/homebrew-cctty).
 
 ### Release Binary
 
@@ -334,11 +332,11 @@ git tag v0.1.0
 git push origin v0.1.0
 ```
 
-The release workflow builds macOS and Linux archives, publishes SHA-256 sums,
-and attaches a generated Homebrew formula as `cctty.rb`. If the repository
-secret `HOMEBREW_TAP_TOKEN` is configured with write access to
-`Pyiner/homebrew-cctty`, the same workflow also updates
-`Formula/cctty.rb` in the tap.
+The release workflow builds macOS and Linux archives and publishes SHA-256
+sums. If the repository secret `HOMEBREW_TAP_TOKEN` is configured with write
+access to `Pyiner/homebrew-cctty`, the same workflow also updates
+`Formula/cctty.rb` in the tap. The formula is not published as a release asset;
+users should install through the tap.
 
 ## Compatibility Matrix