Build a draft release and then publish once complete

.github/workflows/release.yml

@@ -94,33 +94,49 @@ jobs:
               '
           cargo run -p package -- --dest-dir dist/ scie \
             --scie-pants dist/scie-pants --tools-pex dist/tools.pex
+
+      # Build up a draft release with the artifacts from each of these jobs:
+      - name: Create ${{ needs.determine-tag.outputs.release-tag }} Release
+        uses: softprops/action-gh-release@v1
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          tag_name: ${{ needs.determine-tag.outputs.release-tag }}
+          draft: true
+          # placeholder body to help someone track down why a release is still in draft:
+          body: "Release job in progress: https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }}"
+          files: dist/scie-pants-*
+          fail_on_unmatched_files: true
+
+  publish-announce-release:
+    name: Publish and Announce Release
+    needs:
+      - determine-tag
+      - github-release
+    runs-on: ubuntu-22.04
+    steps:
+      # Now, do the human-facing prep on the release (changelog etc.), and publish it
       - name: Prepare Changelog
         id: prepare-changelog
         uses: a-scie/actions/[email protected]
         with:
           changelog-file: ${{ github.workspace }}/CHANGES.md
           version: ${{ needs.determine-tag.outputs.release-version }}
-          setup-python: ${{ matrix.os == 'ubuntu-22.04' }}
-      - name: Create ${{ needs.determine-tag.outputs.release-tag }} Release
+          setup-python: true
+
+      - name: Publish ${{ needs.determine-tag.outputs.release-tag }} Release
         uses: softprops/action-gh-release@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
         with:
-          tag_name: ${{ needs.determine-tag.outputs.release-tag }}
           name: scie-pants ${{ needs.determine-tag.outputs.release-version }}
+          tag_name: ${{ needs.determine-tag.outputs.release-tag }}
           body_path: ${{ steps.prepare-changelog.outputs.changelog-file }}
           draft: false
           prerelease: ${{ needs.determine-tag.outputs.prerelease }}
-          files: dist/scie-pants-*
-          fail_on_unmatched_files: true
           discussion_category_name: Announcements
-  announce-release:
-    name: Announce Release
-    needs:
-      - determine-tag
-      - github-release
-    runs-on: ubuntu-22.04
-    steps:
+
+      # Announce the release! Yay
       - name: Post Release Announcement to Pants Slack `#announce`
         if: ${{ needs.determine-tag.outputs.prerelease != 'true' }}
         id: slack