adding auto merge in airgun (#801)

.github/workflows/auto_cherry_pick.yml

@@ -14,17 +14,32 @@ env:
 
 jobs:
 
+  # Pre-Requisites for Auto Cherrypicking
+  find-the-parent-prt-comment:
+    name: Find & Save last PRT comment of Parent PR
+    runs-on: ubuntu-latest
+    outputs:
+      prt_comment: ${{steps.fc.outputs.comment-body}}
+    steps:
+      - name: Find Comment
+        uses: peter-evans/find-comment@v2
+        id: fc
+        with:
+          issue-number: ${{ env.number }}
+          body-includes: "trigger: test-robottelo"
+
   # Auto CherryPicking and Failure Recording
   auto-cherry-pick:
     if: github.event.pull_request.merged == true && contains(github.event.pull_request.labels.*.name, 'CherryPick')
     name: Auto Cherry Pick to labeled branches
+    needs: find-the-parent-prt-comment
     runs-on: ubuntu-latest
     strategy:
       matrix:
         label: ${{ github.event.pull_request.labels.*.name }}
 
     steps:
-      ## Nailgun Repo Checkout
+      ## Airgun Repo Checkout
       - uses: actions/checkout@v3
         if: ${{ startsWith(matrix.label, '6.') && matrix.label != github.base_ref }}
         with:
@@ -40,10 +55,32 @@ jobs:
           branch: ${{ matrix.label }}
           labels: |
             Auto_Cherry_Picked
-            No-CherryPick
             ${{ matrix.label }}
+            No-CherryPick
           assignees: ${{ env.assignee }}
 
+      - name: Add Parent PR's PRT comment to Auto_Cherry_Picked PR's
+        id: add-parent-prt-comment
+        if: ${{ always() && steps.cherrypick.outcome == 'success' }}
+        uses: mshick/add-pr-comment@v2
+        with:
+          issue: ${{ steps.cherrypick.outputs.number }}
+          message: ${{ needs.find-the-parent-prt-comment.outputs.prt_comment }}
+          repo-token: ${{ secrets.CHERRYPICK_PAT }}
+
+      - name: is autoMerging enabled for Auto CherryPicked PRs ?
+        if: ${{ always() && steps.cherrypick.outcome == 'success' && contains(github.event.pull_request.labels.*.name, 'AutoMerge_Cherry_Picked') }}
+        uses: actions/github-script@v6
+        with:
+          github-token: ${{ secrets.CHERRYPICK_PAT }}
+          script: |
+            github.rest.issues.addLabels({
+              issue_number: ${{ steps.cherrypick.outputs.number }},
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              labels: ["AutoMerge_Cherry_Picked"]
+            })
+
       ## Failure Logging to issues and GChat Group
       - name: Create Github issue on cherrypick failure
         id: create-issue
@@ -56,7 +93,7 @@ jobs:
             #### Auto-Cherry-Pick WorkFlow Failure:
             - To Branch: ${{ matrix.label }}
             - [Failed Cherrypick Action](https://github.com/${{ github.repository }}/actions/runs/${{ github.run_id }})
-            - [Parent Pull Request](https://github.com/${{ github.repository }}/pull/${{ env.number }})
+            - [Parent Pull Request](https://github.com/${{ github.repository }}/pull/${{ github.event.number }})
           labels: Failed_AutoCherryPick,${{ matrix.label }}
           assignees: ${{ env.assignee }}
       - name: Send Google Chat notification on cherrypick failure

.github/workflows/automerge.yaml

@@ -0,0 +1,123 @@
+name: automerge auto-cherry-picked pr's
+on:
+  pull_request_target:
+    types:
+      - labeled
+      - unlabeled
+      - edited
+      - ready_for_review
+    branches-ignore:
+      - master
+  pull_request_review:
+    types:
+      - submitted
+    branches-ignore:
+      - master
+  check_suite:
+    types:
+      - completed
+    branches-ignore:
+      - master
+
+
+jobs:
+  automerge:
+    name: Automerge auto-cherry-picked pr
+    if: contains(github.event.pull_request.labels.*.name, 'AutoMerge_Cherry_Picked') && contains(github.event.pull_request.labels.*.name, 'Auto_Cherry_Picked')
+    runs-on: ubuntu-latest
+    steps:
+      - id: find-prt-comment
+        name: Find the prt comment
+        uses: peter-evans/find-comment@v2
+        with:
+          issue-number: ${{ github.event.number }}
+          body-includes: "trigger: test-robottelo"
+          direction: last
+
+      - name: Fail automerge if PRT was not initiated
+        if: steps.find-prt-comment.outputs.comment-body == ''
+        run: |
+          echo "::error PRT comment not added the PR"
+
+      - name: Wait for PRT checks to get initiated
+        run: |
+          echo "Waiting for ~ 10 mins, PRT to be initiated." && sleep 600
+
+      - name: Wait for other status checks to Pass
+        id: waitforstatuschecks
+        uses: lewagon/[email protected]
+        with:
+          ref: ${{ github.head_ref }}
+          repo-token: ${{ secrets.CHERRYPICK_PAT }}
+          wait-interval: 60
+          running-workflow-name: 'Automerge auto-cherry-picked pr'
+          allowed-conclusions: success,skipped
+
+      - name: is PRT check Passed ?
+        run: |
+          api_endpoint="https://api.github.com/repos/${{github.repository}}/statuses/${{ github.head_ref }}"
+
+          function get_status() {
+            curl -s "$api_endpoint"  | jq '[.[] | .state] | .[0]'
+          }
+
+          function get_context() {
+            curl -s "$api_endpoint" | jq '[.[] | .context] | .[0]'
+          }
+
+          statuses_length=$(curl -s $api_endpoint | jq 'length')
+          if [ $statuses_length -eq 0 ]; then
+              echo "PRT failed to start ! Stopping."
+              exit 1
+          fi
+
+          status=$(get_status)
+          context=$(get_context)
+
+          if [ "$context" != "Robottelo-Runner" ]; then
+            echo "::error Failed to get Robottelo-Runner status"
+            exit 1
+          fi
+
+          counter=0
+          echo "Waiting for PRT to complete....."
+          while [ "$status" != "success" ] && [ "$status" != "failure" ]; do
+            if [ $counter -gt 20 ]; then
+              echo "PRT Timeout"
+              exit 1
+            fi
+            sleep 300
+            status=$(get_status)
+            echo "Robottelo-Runner : $status"
+            counter=$((counter+1))
+          done
+
+          if [ "$status" == "success" ]; then
+            echo "PRT Passed Successfully!"
+          else
+            echo "Robottelo-Runner : $status"
+            echo "::error PRT failed"
+            exit 1
+          fi
+
+
+      - id: automerge
+        name: Auto merge of cherry-picked PRs.
+        uses: "pascalgn/[email protected]"
+        if: steps.waitforstatuschecks.outputs.status == 'success'
+        env:
+          GITHUB_TOKEN: "${{ secrets.CHERRYPICK_PAT }}"
+          MERGE_LABELS: "AutoMerge_Cherry_Picked, Auto_Cherry_Picked"
+          MERGE_METHOD: "squash"
+          MERGE_RETRIES: 5
+          MERGE_RETRY_SLEEP: 900000
+          BASE_BRANCHES: "master" # avoid automerge branch
+
+      - name: Auto Merge Status
+        run: |
+          if [ "${{ steps.automerge.outputs.mergeResult }}" == 'merged' ]; then
+            echo "Pull request ${{ steps.automerge.outputs.pullRequestNumber }} is Auto Merged !"
+          else
+            echo "::error Auto Merge for Pull request failed !"
+            exit 1
+          fi