[ci] simplify release workflow.

.github/workflows/pypi_publish.yaml

@@ -1,82 +1,72 @@
-# Adapted from https://blog.deepjyoti30.dev/pypi-release-github-action
-
 name: PyPI release
 
 on:
   workflow_dispatch:
   push:
     tags:
-      - "*"
+      - "v*"
 
 jobs:
-  find-and-checkout-latest-branch:
+  build-and-test:
     runs-on: ubuntu-22.04
-    outputs:
-      latest_branch: ${{ steps.set_latest_branch.outputs.latest_branch }}
     steps:
-      - name: Checkout Repo
+      - name: Checkout repo
         uses: actions/checkout@v6
 
       - name: Set up Python
         uses: actions/setup-python@v6
         with:
-          python-version: '3.10'
+          python-version: "3.10"
 
-      - name: Fetch latest branch
-        id: fetch_latest_branch
+      - name: Fetch and checkout latest release branch
         run: |
           pip install -U requests packaging
           LATEST_BRANCH=$(python utils/fetch_latest_release_branch.py)
           echo "Latest branch: $LATEST_BRANCH"
-          echo "latest_branch=$LATEST_BRANCH" >> $GITHUB_ENV
-
-      - name: Set latest branch output
-        id: set_latest_branch
-        run: echo "::set-output name=latest_branch::${{ env.latest_branch }}"
-
-  release:
-    needs: find-and-checkout-latest-branch
-    runs-on: ubuntu-22.04
-
-    steps:
-      - name: Checkout Repo
-        uses: actions/checkout@v6
-        with:
-          ref: ${{ needs.find-and-checkout-latest-branch.outputs.latest_branch }}
-
-      - name: Setup Python
-        uses: actions/setup-python@v6
-        with:
-          python-version: "3.10"
+          git fetch origin "$LATEST_BRANCH"
+          git checkout "$LATEST_BRANCH"
 
-      - name: Install dependencies
+      - name: Install build dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install -U setuptools wheel twine
+          pip install -U build
           pip install -U torch --index-url https://download.pytorch.org/whl/cpu
 
       - name: Build the dist files
-        run: python setup.py bdist_wheel && python setup.py sdist
+        run: python -m build
 
-      - name: Publish to the test PyPI
-        env:
-          TWINE_USERNAME: ${{ secrets.TEST_PYPI_USERNAME }}
-          TWINE_PASSWORD: ${{ secrets.TEST_PYPI_PASSWORD }}
-        run: twine upload dist/* -r pypitest --repository-url=https://test.pypi.org/legacy/
+      - name: Install from built wheel
+        run: pip install dist/*.whl
 
       - name: Test installing diffusers and importing
         run: |
-          pip install diffusers && pip uninstall diffusers -y
-          pip install -i https://test.pypi.org/simple/ diffusers
           pip install -U transformers
           python utils/print_env.py
           python -c "from diffusers import __version__; print(__version__)"
           python -c "from diffusers import DiffusionPipeline; pipe = DiffusionPipeline.from_pretrained('fusing/unet-ldm-dummy-update'); pipe()"
           python -c "from diffusers import DiffusionPipeline; pipe = DiffusionPipeline.from_pretrained('hf-internal-testing/tiny-stable-diffusion-pipe', safety_checker=None); pipe('ah suh du')"
           python -c "from diffusers import *"
 
+      - name: Upload build artifacts
+        uses: actions/upload-artifact@v4
+        with:
+          name: python-dist
+          path: dist/
+
+  publish-to-pypi:
+    needs: build-and-test
+    if: startsWith(github.ref, 'refs/tags/')
+    runs-on: ubuntu-22.04
+    environment: pypi-release
+    permissions:
+      id-token: write
+
+    steps:
+      - name: Download build artifacts
+        uses: actions/download-artifact@v4
+        with:
+          name: python-dist
+          path: dist/
+
       - name: Publish to PyPI
-        env:
-          TWINE_USERNAME: ${{ secrets.PYPI_USERNAME }}
-          TWINE_PASSWORD: ${{ secrets.PYPI_PASSWORD }}
-        run: twine upload dist/* -r pypi
+        uses: pypa/gh-action-pypi-publish@release/v1