disable testpypi in ci

.github/workflows/publish.yml

@@ -1,6 +1,12 @@
 name: Publish to PyPI
 
-on: push
+on:
+  push:
+    branches:
+      - main
+  pull_request:
+    branches:
+      - main
 
 jobs:
   publish:
@@ -20,12 +26,14 @@ jobs:
       run: python3 -m pip install --user build
     - name: Build wheel and tarball
       run: python3 -m build --sdist --wheel --outdir dist/ ${{ matrix.package }}
-    - name: Publish to TestPyPI
-      uses: pypa/[email protected]
-      with:
-        password: ${{ secrets.TEST_PYPI_API_TOKEN }}
-        repository-url: https://test.pypi.org/legacy/
-        skip-existing: true
+    # TestPyPI currently disabled cause `skip-existing: true` is not honored
+    # https://github.com/pypa/gh-action-pypi-publish/issues/201
+    # - name: Publish to TestPyPI
+    #   uses: pypa/[email protected]
+    #   with:
+    #     password: ${{ secrets.TEST_PYPI_API_TOKEN }}
+    #     repository-url: https://test.pypi.org/legacy/
+    #     skip-existing: true
     - name: Publish to PyPI
       if: startsWith(github.ref, 'refs/tags')
       uses: pypa/[email protected]