Link merged PR to issue (#28808)

.github/workflows/link-pr-to-issue.yml

@@ -0,0 +1,65 @@
+# action.yml
+name: 'Link Pull Request to Issue'
+on:
+  workflow_call:
+    inputs:
+      pr_number:
+        description: 'Pull Request number'
+        type: number
+        required: true
+      pr_branch:
+        description: 'Pull Request branch'
+        type: string
+        required: true
+      validate_merge:
+        description: 'Validate merge'
+        type: boolean
+        required: false
+        default: true
+
+jobs:
+  link-pr-to-issue:
+    runs-on: ubuntu-20.04
+    continue-on-error: true
+    steps:
+      - run: echo 'GitHub context'
+        env:
+          GITHUB_CONTEXT: ${{ toJson(github) }}
+
+      - name: Link PR to Issue
+        shell: bash
+        run: |
+          pr_json=$(\
+            gh api \
+              --method GET \
+              repos/${{ github.repository }}/pulls/${{ inputs.pr_number }} \
+            | jq -c -r \
+          )
+          
+          pr_merged=$(echo "${pr_json}" | jq '.merged')
+          [[ "${{ inputs.validate_merge }}" == 'true' && "${pr_merged}" != 'true' ]] && echo "PR [${{ inputs.pr_number }}] is not merged" && exit 1
+          echo "pr_merged=${pr_merged}"
+          
+          pr_branch=${{ inputs.pr_branch }}
+          [[ ${pr_branch} =~ ^[0-9]+- ]] && issue_number=${pr_branch%%-*} || issue_number=${pr_branch}
+          [[ -z "${issue_number}" ]] && echo 'Issue number could not be resolved' && exit 2
+          echo "issue_number=${issue_number}"
+          
+          issue_json=$(\
+            gh api \
+              --method GET \
+              repos/${{ github.repository }}/issues/${issue_number} \
+          )
+          fetched_issue_number=$(echo "${issue_json}" | jq -r '.number')
+          [[ -z "${fetched_issue_number}" ]] && echo "Issue [${issue_number}] could not be resolved" && exit 3
+          
+          pr_body=$(echo "${pr_json}" | jq -r '.body')
+          pr_body="${pr_body}"$'\n\n'"This PR fixes: #${issue_number}"
+          echo "pr_body=${pr_body}"
+          
+          gh api \
+            --method PATCH \
+            -H "Accept: application/vnd.github+json" \
+            -H "X-GitHub-Api-Version: 2022-11-28" \
+            /repos/${{ github.repository }}/pulls/${{ inputs.pr_number }} \
+            -f "body=\"${pr_body}\""

.github/workflows/post-pr-merge.yml

@@ -0,0 +1,17 @@
+name: Post PR Merge
+on:
+  pull_request:
+    branches:
+      - 28716-test
+    types:
+      - closed
+
+jobs:
+  post-pr-merge:
+    name: Post Merge PR
+    if: github.event.pull_request.merged == true
+    uses: ./.github/workflows/link-pr-to-issue.yml
+    with:
+      pr_number: ${{ github.event.pull_request.number }}
+      pr_branch: ${{ github.event.pull_request.head.ref }}
+      validate_merge: false