Allow nightly to fail (#1288)

.github/workflows/auto-merge-main-to-nightly.yml

@@ -18,10 +18,21 @@ jobs:
         with:
             ref: nightly
             fetch-depth: 0 # need all history to merge main
-
+      # workaround for allow-failure not existing : https://github.com/orgs/community/discussions/15452#discussioncomment-6012299
       - name: Merge main to nightly
         run: |
-          git config user.name "GitHub Actions"
-          git config user.email "actions@github.com"
-          git merge origin/main -m "merge main to nightly" --no-edit
-          git push origin nightly
+          #
+          set +e
+          set +o pipefail
+
+          function wrap_command() {
+            git config user.name "GitHub Actions"
+            git config user.email "actions@github.com"
+            git merge origin/main -m "merge main to nightly" --no-edit
+            git push origin nightly
+          }
+
+          wrap_command
+          echo $?
+          exit 0
+