Use shared auto-merge workflow [skip ci]

.github/workflows/auto-merge.yml

@@ -1,4 +1,4 @@
-# Copyright (c) 2022-2024, NVIDIA CORPORATION.
+# Copyright (c) 2022-2025, NVIDIA CORPORATION.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -22,78 +22,13 @@ on:
     types: [closed]
 
 jobs:
-  auto-merge: # TODO: use spark-rapids-common shared action when available
+  auto-merge:
     if: github.event.pull_request.merged == true
-    runs-on: ubuntu-latest
-
-    steps:
-      - name: set HEAD ENV
-        run: echo "HEAD=${{ github.event.pull_request.base.ref }}" >> $GITHUB_ENV
-
-      - name: Generate target branch
-        run: |
-          current_branch="${{ env.HEAD }}"
-          version=${current_branch#branch-}
-
-          IFS='.' read -r -a parts <<< "$version"
-          year=${parts[0]}
-          month=${parts[1]}
-          month=$((10#$month + 2))
-          if [ $month -gt 12 ]; then
-            month=$((month - 12))
-            year=$((year + 1))
-          fi
-
-          next_release=$(printf "%02d.%02d" $year $month)
-          echo "Next release is $next_release"
-          echo "BASE=branch-$next_release" >> $GITHUB_ENV
-
-      - name: Check if target branch exists
-        run: |
-          CODE=$(curl -s -o /dev/null -w "%{http_code}" -H "Authorization: token ${{ secrets.AUTOMERGE_TOKEN }}" \
-            https://api.github.com/repos/${{ github.repository }}/branches/${{ env.BASE }})
-          echo "Response code: $CODE..."
-
-          if [ $CODE -eq 200 ]; then
-            echo "branch_exists=true" >> $GITHUB_ENV
-          else
-            echo "branch_exists=false" >> $GITHUB_ENV
-            echo "Failed to find ${{ env.BASE }}. Skip auto-merge..."
-          fi
-
-      - uses: actions/checkout@v4
-        if: env.branch_exists == 'true'
-        with:
-          ref: ${{ env.HEAD }} # force to fetch from latest upstream instead of PR ref
-          token: ${{ secrets.AUTOMERGE_TOKEN }} # workaround auto-merge token to avoid GITHUB_TOKEN insufficient permission
-
-      - name: push intermediate branch for auto-merge
-        if: env.branch_exists == 'true'
-        run: |
-          git config user.name "spark-rapids automation"
-          git config user.email "[email protected] "
-          git fetch origin ${HEAD} ${BASE}
-          git checkout -b ${INTERMEDIATE_HEAD} origin/${HEAD}
-          # Sync the $BASE branch with the commits from the $HEAD branch,
-          # excluding the paths defined as $FILE_USE_BASE (located under ./thirdparty).
-          git checkout origin/${BASE} -- ${FILE_USE_BASE}
-          # If any submodule file is updated in the HEAD branch,
-          # always change it to the corresponding one from the BASE branch.
-          [ ! -z "$(git status --porcelain=v1 --untracked=no)" ] && \
-            git commit -s -am "Auto-merge use ${BASE} versions"
-          git push origin ${INTERMEDIATE_HEAD} -f
-        env:
-          INTERMEDIATE_HEAD: bot-auto-merge-${{ env.HEAD }}
-          FILE_USE_BASE: thirdparty/cudf thirdparty/cudf-pins
-
-      - name: auto-merge job
-        if: env.branch_exists == 'true'
-        uses: ./.github/workflows/action-helper
-        with:
-          operator: auto-merge
-        env:
-          OWNER: NVIDIA
-          REPO: spark-rapids-jni
-          HEAD: bot-auto-merge-${{ env.HEAD }}
-          BASE: ${{ env.BASE }}
-          TOKEN: ${{ secrets.AUTOMERGE_TOKEN }}
+    uses: NVIDIA/spark-rapids-common/.github/workflows/auto-merge.yml@main
+    with:
+      owner: ${{ github.repository_owner }}
+      repo: spark-rapids-jni
+      branch: ${{ github.event.pull_request.base.ref }}
+      file_use_base: 'thirdparty/cudf thirdparty/cudf-pins'
+    secrets:
+      token: ${{ secrets.AUTOMERGE_TOKEN }}