feat(gha): [SDK-2032] Create Github Action to merge dependabot PRs

.github/workflows/dependabot-merger.yml

@@ -0,0 +1,160 @@
+name: Merge Dependabot PRs
+
+on:
+  schedule:
+    - cron: "0 9 * * 1" # Run this workflow every Monday at 9:00
+  workflow_dispatch:
+
+jobs:
+  merge:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Get current on-call
+        id: on-call
+        run: |
+          now=$(date -u +%Y-%m-%dT%H:%M:%SZ)
+          end_time=$(date -u -d '+24 hour' +%Y-%m-%dT%H:%M:%SZ)
+          
+          oncall=$(curl --request GET \
+              --url "https://api.pagerduty.com/oncalls?since=$now&until=$end_time&schedule_ids[]=PQLHTOP" \
+              --header 'Accept: application/vnd.pagerduty+json;version=2' \
+              --header "Authorization: Token token=${{ secrets.PAGERDUTY_TOKEN }}" \
+              --header 'Content-Type: application/json' )
+          
+          engineer_name=$(echo "$oncall" | jq -r '.oncalls[0].user.summary')
+
+          declare -A engineer_to_slackid
+          engineer_to_slackid=(
+              ["Nipun Singh"]="U02AMC70R6E"
+              ["Jagadeesh Karicherla"]="U038BDE0XUZ"
+              ["Gabe De Luna"]="U02MDA0PHK5"
+              ["Ernest Cho"]="UCV77QDSL"
+              ["Nidhi Dixit"]="U02GDFBP88N"
+          )
+          
+          slack_id=${engineer_to_slackid["$engineer_name"]}          
+          echo "oncall_slack_id=$slack_id" >> $GITHUB_OUTPUT
+
+      - name: Create PR
+        uses: actions/github-script@v6
+        id: create-pr
+        with:
+          script: |
+            const uniqueBranchName = 'dependabot-combined-prs-' + Date.now().toString();
+            const pulls = await github.paginate('GET /repos/:owner/:repo/pulls', {
+              owner: context.repo.owner,
+              repo: context.repo.repo
+            });
+            let branchesAndPRStrings = [];
+            let baseBranch = null;
+            let baseBranchSHA = null;
+            for (const pull of pulls) {
+              const branch = pull['head']['ref'];
+              if (branch.startsWith('dependabot/')) {
+                console.log('Branch matched prefix. Adding to array: ' + branch);
+                const prString = '#' + pull['number'] + ' ' + pull['title'];
+                branchesAndPRStrings.push({ branch, prString });
+                baseBranch = pull['base']['ref'];
+                baseBranchSHA = pull['base']['sha'];
+              }
+            }
+            if (branchesAndPRStrings.length == 0) {
+              core.setFailed('There are no open dependabot PRs.');
+              return;
+            }
+            try {
+              await github.rest.git.createRef({
+                owner: context.repo.owner,
+                repo: context.repo.repo,
+                ref: 'refs/heads/' + uniqueBranchName,
+                sha: baseBranchSHA
+              });
+            } catch (error) {
+              console.log(error);
+              core.setFailed('Failed to create combined branch');
+              return;
+            }
+
+            let combinedPRs = [];
+            let mergeFailedPRs = [];
+            for(const { branch, prString } of branchesAndPRStrings) {
+              try {
+                await github.rest.repos.merge({
+                  owner: context.repo.owner,
+                  repo: context.repo.repo,
+                  base: uniqueBranchName,
+                  head: branch,
+                });
+                console.log('Merged branch ' + branch);
+                combinedPRs.push(prString);
+              } catch (error) {
+                console.log('Failed to merge branch ' + branch);
+                mergeFailedPRs.push(prString);
+              }
+            }
+
+            console.log('Creating combined PR');
+            const combinedPRsString = combinedPRs.join('\n');
+            let body = '✅ This PR was created by the Merge Dependabot PRs action by combining the following dependabot PRs:\n' + combinedPRsString;
+            if(mergeFailedPRs.length > 0) {
+              const mergeFailedPRsString = mergeFailedPRs.join('\n');
+              body += '\n\n⚠️ The following dependabot PRs were left out due to merge conflicts:\n' + mergeFailedPRsString
+            }
+            let response = await github.rest.pulls.create({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              title: 'Combined Dependabot PR',
+              head: uniqueBranchName,
+              base: baseBranch,
+              body: body
+            });
+            console.log('Created combined PR: ' + response.data.html_url);
+            core.setOutput('pr_url', response.data.html_url);
+            core.setOutput('pr_list', combinedPRsString);
+
+      - name: Post to a Slack channel
+        uses: slackapi/[email protected]
+        id: slack
+        with:
+          channel-id: "C03RTLRKJQP"
+          payload: |
+            {
+                "text": "React Native: New Dependabot PR Awaiting Review",
+                "blocks": [
+                {
+                    "type": "header",
+                    "text": {
+                    "type": "plain_text",
+                    "text":"📱🔧 React Native: New Dependabot PR Awaiting Review",
+                    "emoji": true
+                    }
+                },
+                {
+                    "type": "section",
+                    "text": {
+                    "type": "mrkdwn",
+                    "text": "*Included PRs:*\n${{ steps.create-pr.outputs.pr_list }}\n\n\nCurrent On-Call: *<${{ steps.on-call.outputs.oncall_slack_id }}>*"
+                    }
+                },
+                {
+                    "type": "actions",
+                    "elements": [
+                      {
+                          "type": "button",
+                          "text": {
+                            "type": "plain_text",
+                            "text": ":github-pull-request-open:  View Combined PR",
+                            "emoji": true
+                          },
+                          "value": "pr-button",
+                          "url": "${{ steps.create-pr.outputs.pr_url }}",
+                          "action_id": "link-action",
+                          "style": "primary"
+                      }
+                    ]
+                }
+              ]
+            }
+        env:
+          SLACK_BOT_TOKEN: ${{ secrets.SLACK_SDK_BOT_TOKEN }}