[CI] Add url and dismiss reviews once conditions are met (#9748)

.github/workflows/auto-label-pr.yml

@@ -14,6 +14,7 @@ env:
   SMALL_PR_THRESHOLD: 30
   MAX_LABELS: 15
   TOO_BIG_THRESHOLD: 1000
+  BOT_NAME: "esphome[bot]"
 
 jobs:
   label:
@@ -122,6 +123,7 @@ jobs:
             const smallPrThreshold = parseInt('${{ env.SMALL_PR_THRESHOLD }}');
             const maxLabels = parseInt('${{ env.MAX_LABELS }}');
             const tooBigThreshold = parseInt('${{ env.TOO_BIG_THRESHOLD }}');
+            const botName = process.env.BOT_NAME;
 
             // Strategy: Merge to release or beta branch
             const baseRef = context.payload.pull_request.base.ref;
@@ -377,14 +379,14 @@ jobs:
 
             console.log('Computed labels:', finalLabels.join(', '));
 
-            // Check if PR is allowed to be too big
+            // Check if PR has mega-pr label
-            const allowedTooBig = currentLabels.includes('mega-pr');
+            const isMegaPR = currentLabels.includes('mega-pr');
 
             // Check if PR is too big (either too many labels or too many line changes)
             const tooManyLabels = finalLabels.length > maxLabels;
             const tooManyChanges = totalChanges > tooBigThreshold;
 
-            if ((tooManyLabels || tooManyChanges) && !allowedTooBig) {
+            if ((tooManyLabels || tooManyChanges) && !isMegaPR) {
               const originalLength = finalLabels.length;
               console.log(`PR is too big - Labels: ${originalLength}, Changes: ${totalChanges}`);
 
@@ -399,11 +401,11 @@ jobs:
               // Create appropriate review message
               let reviewBody;
               if (tooManyLabels && tooManyChanges) {
-                reviewBody = `This PR is too large with ${totalChanges} line changes and affects ${originalLength} different components/areas. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.`;
+                reviewBody = `This PR is too large with ${totalChanges} line changes and affects ${originalLength} different components/areas. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.\n\nFor guidance on breaking down large PRs, see: https://developers.esphome.io/contributing/submitting-your-work/#but-howwww-looonnnggg`;
               } else if (tooManyLabels) {
-                reviewBody = `This PR affects ${originalLength} different components/areas. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.`;
+                reviewBody = `This PR affects ${originalLength} different components/areas. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.\n\nFor guidance on breaking down large PRs, see: https://developers.esphome.io/contributing/submitting-your-work/#but-howwww-looonnnggg`;
               } else {
-                reviewBody = `This PR is too large with ${totalChanges} line changes. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.`;
+                reviewBody = `This PR is too large with ${totalChanges} line changes. Please consider breaking it down into smaller, focused PRs to make review easier and reduce the risk of conflicts.\n\nFor guidance on breaking down large PRs, see: https://developers.esphome.io/contributing/submitting-your-work/#but-howwww-looonnnggg`;
               }
 
               // Request changes on the PR
@@ -414,6 +416,49 @@ jobs:
                 body: reviewBody,
                 event: 'REQUEST_CHANGES'
               });
+            } else {
+              // Check if PR was previously too big but is now acceptable
+              const wasPreviouslyTooBig = currentLabels.includes('too-big');
+
+              if (wasPreviouslyTooBig || isMegaPR) {
+                console.log('PR is no longer too big or has mega-pr label - dismissing bot reviews');
+
+                // Get all reviews on this PR
+                const { data: reviews } = await github.rest.pulls.listReviews({
+                  owner,
+                  repo,
+                  pull_number: pr_number
+                });
+
+                // Find bot reviews that requested changes
+                const botReviews = reviews.filter(review =>
+                  review.user.login === botName &&
+                  review.state === 'CHANGES_REQUESTED' &&
+                  review.body && (
+                    review.body.includes('This PR is too large') ||
+                    review.body.includes('This PR affects') ||
+                    review.body.includes('different components/areas')
+                  )
+                );
+
+                // Dismiss bot reviews
+                for (const review of botReviews) {
+                  try {
+                    await github.rest.pulls.dismissReview({
+                      owner,
+                      repo,
+                      pull_number: pr_number,
+                      review_id: review.id,
+                      message: isMegaPR ?
+                        'Review dismissed: mega-pr label was added' :
+                        'Review dismissed: PR size is now acceptable'
+                    });
+                    console.log(`Dismissed review ${review.id}`);
+                  } catch (error) {
+                    console.log(`Failed to dismiss review ${review.id}:`, error.message);
+                  }
+                }
+              }
             }
 
             // Add new labels