ci: update merge conflict bot to trigger on main

.github/scripts/merge_conflict_helpers.js

@@ -0,0 +1,92 @@
+// scripts/merge_conflict_helpers.js
+
+const BOT_SIGNATURE = '';
+
+module.exports = async ({ github, context, core }) => {
+  const { owner, repo } = context.repo;
+
+  // fetch PR with retry logic for unknown state
+  async function getPrWithRetry(prNumber) {
+    for (let i = 0; i < 10; i++) {
+      const { data: pr } = await github.rest.pulls.get({
+        owner, repo, pull_number: prNumber
+      });
+
+      if (pr.mergeable_state !== 'unknown') return pr;
+
+      console.log(`PR #${prNumber} state is 'unknown'. Retrying (${i+1}/10)...`);
+      await new Promise(r => setTimeout(r, 2000));
+    }
+    const { data: pr } = await github.rest.pulls.get({ owner, repo, pull_number: prNumber });
+    return pr;
+  }
+
+  // post comment
+  async function notifyUser(prNumber) {
+    const { data: comments } = await github.rest.issues.listComments({
+      owner, repo, issue_number: prNumber,
+    });
+
+    if (comments.some(c => c.body.includes(BOT_SIGNATURE))) {
+      console.log(`Already commented on PR #${prNumber}. Skipping.`);
+      return;
+    }
+
+    const body = `Hi, this is MergeConflictBot.\nYour pull request cannot be merged because it contains **merge conflicts**.\n\nPlease resolve these conflicts locally and push the changes.\n\nTo assist you, please read:\n- [Resolving Merge Conflicts](docs/sdk_developers/merge_conflicts.md)\n- [Rebasing Guide](docs/sdk_developers/rebasing.md)\n\nThank you for contributing!\nFrom the Hiero Python SDK Team\n\n${BOT_SIGNATURE}`;
+
+    await github.rest.issues.createComment({
+      owner, repo, issue_number: prNumber, body: body
+    });
+  }
+
+  //set commit status
+  async function setCommitStatus(sha, state, description) {
+    await github.rest.repos.createCommitStatus({
+      owner, repo, sha: sha, state: state,
+      context: 'Merge Conflict Detector',
+      description: description,
+      target_url: `${process.env.GITHUB_SERVER_URL}/${owner}/${repo}/actions/runs/${context.runId}`
+    });
+  }
+
+  //main
+  let prsToCheck = [];
+
+  //push to main
+  if (context.eventName === 'push') {
+    console.log("Triggered by Push to Main. Fetching all open PRs...");
+    const { data: openPrs } = await github.rest.pulls.list({
+      owner, repo, state: 'open', base: 'main'
+    });
+    prsToCheck = openPrs.map(pr => pr.number);
+  } 
+  //PR update
+  else {
+    console.log("Triggered by PR update.");
+    prsToCheck.push(context.payload.pull_request.number);
+  }
+
+  let hasFailure = false;
+
+  for (const prNumber of prsToCheck) {
+    console.log(`Checking PR #${prNumber}...`);
+    const pr = await getPrWithRetry(prNumber);
+
+    if (pr.mergeable_state === 'dirty') {
+      console.log(`Conflict detected in PR #${prNumber}`);
+      await notifyUser(prNumber);
+
+      if (context.eventName === 'push') {
+        await setCommitStatus(pr.head.sha, 'failure', 'Conflicts detected with main');
+      } else {
+        core.setFailed(`Merge conflicts detected in PR #${prNumber}.`);
+        hasFailure = true;
+      }
+    } else {
+      console.log(`PR #${prNumber} is clean.`);
+      if (context.eventName === 'push') {
+        await setCommitStatus(pr.head.sha, 'success', 'No conflicts detected');
+      }
+    }
+  }
+};

.github/workflows/merge-conflict-bot.yml

@@ -1,71 +1,41 @@
-name: PythonBot - Check Merge Conflicts
+name: Merge Conflict Bot
 
 on:
   pull_request_target:
     types: [opened, synchronize, reopened]
+  push:
+    branches:
+      - main
 
 permissions:
   contents: read
   pull-requests: write
+  issues: write
+  statuses: write
 
 concurrency:
-  group: "check-conflicts-${{ github.event.pull_request.number }}"
+  group: "check-conflicts-${{ github.event.pull_request.number || github.sha }}"
   cancel-in-progress: true
 
 jobs:
   check-conflicts:
     runs-on: ubuntu-latest
-
     steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
       - name: Harden the runner (Audit all outbound calls)
-        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76 # v2.14.0
+        uses: step-security/harden-runner@20cf305ff2072d973412fa9b1e3a4f227bda3c76
         with:
           egress-policy: audit
-
-      - name: Check for merge conflicts
-        env:
-          GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-        run: |
-          PR_NUMBER=${{ github.event.pull_request.number }}
-          REPO="${{ github.repository }}"
-
-          echo "Checking merge status for PR #$PR_NUMBER in repository $REPO..."
-
-          for i in {1..10}; do
-            PR_JSON=$(gh api repos/$REPO/pulls/$PR_NUMBER)
-            MERGEABLE_STATE=$(echo "$PR_JSON" | jq -r '.mergeable_state')
-
-            echo "Attempt $i: Current mergeable state: $MERGEABLE_STATE"
-
-            if [ "$MERGEABLE_STATE" != "unknown" ]; then
-              break
-            fi
-
-            echo "State is 'unknown', waiting 2 seconds..."
-            sleep 2
-          done
 
-          if [ "$MERGEABLE_STATE" = "dirty" ]; then
-            COMMENT=$(cat <<EOF
-            Hi, this is MergeConflictBot. 
-            Your pull request cannot be merged because it contains **merge conflicts**. 
-            
-            Please resolve these conflicts locally and push the changes.
-
-            To assist you, please read:
-            - [Resolving Merge Conflicts](docs/sdk_developers/merge_conflicts.md)
-            - [Rebasing Guide](docs/sdk_developers/rebasing.md)
-
-            Thank you for contributing!
-
-            From the Hiero Python SDK Team
-          EOF
-            )
-
-            gh pr view $PR_NUMBER --repo $REPO --json comments --jq '.comments[].body' | grep -F "MergeConflictBot" >/dev/null || \
-            (gh pr comment $PR_NUMBER --repo $REPO --body "$COMMENT" && echo "Comment added to PR #$PR_NUMBER")
+      - name: Check for merge conflicts
+        uses: actions/github-script@ed597411d8f924073f98dfc5c65a23a2325f34cd
+        with:
+          script: |
+            const path = require('path')
+            const scriptPath = path.join(process.env.GITHUB_WORKSPACE, '.github/scripts/merge_conflict_helpers.js')
             
-            exit 1
-          else
-            echo "No merge conflicts detected (State: $MERGEABLE_STATE)."
-          fi
+            console.log(`Loading script from: ${scriptPath}`)
+            const script = require(scriptPath)
+            await script({github, context, core})