Generate ABI on CI

Author: hugovk

.github/workflows/build.yml

@@ -78,15 +78,28 @@ jobs:
           ./configure --enable-shared
           make -j4
       - name: Check for changes in the ABI
+        id: check
         run: |
           if ! make check-abidump; then
             echo "Generated ABI file is not up to date."
             echo "Please add the release manager of this branch as a reviewer of this PR."
             echo ""
+            echo "The up to date ABI file should be attached to this build as an artifact."
+            echo ""
             echo "To learn more about this check: https://devguide.python.org/setup/#regenerate-the-abi-dump"
             echo ""
             exit 1
           fi
+      - name: Generate updated ABI files
+        if: ${{ failure() && steps.check.conclusion == 'failure' }}
+        run: |
+          make regen-abidump
+      - uses: actions/upload-artifact@v4
+        name: Publish updated ABI files
+        if: ${{ failure() && steps.check.conclusion == 'failure' }}
+        with:
+          name: abi-data
+          path: ./Doc/data/*.abi
 
   check_generated_files:
     name: 'Check if generated files are up to date'