From ec5640ff8d81142a0db12efaf9582e0c255c2a1d Mon Sep 17 00:00:00 2001
From: komagata <komagata@gmail.com>
Date: Thu, 24 Jul 2025 19:15:39 +0900
Subject: [PATCH] =?UTF-8?q?PR=E4=BD=9C=E6=88=90=E6=99=82=E3=81=AB=E8=87=AA?=
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- DraftではないPRが作成されたときに自動実行
- komagataとokuramasafumiを3:2の確率で選択
- PR作成者自身は除外
---
 .github/workflows/auto-assign-reviewer.yml | 52 ++++++++++++++++++++++
 1 file changed, 52 insertions(+)
 create mode 100644 .github/workflows/auto-assign-reviewer.yml

diff --git a/.github/workflows/auto-assign-reviewer.yml b/.github/workflows/auto-assign-reviewer.yml
new file mode 100644
index 00000000000..5e4779fd766
--- /dev/null
+++ b/.github/workflows/auto-assign-reviewer.yml
@@ -0,0 +1,52 @@
+name: Auto Assign Reviewer
+
+on:
+  pull_request:
+    types: [opened, ready_for_review]
+
+jobs:
+  assign-reviewer:
+    if: github.event.pull_request.draft == false
+    runs-on: ubuntu-latest
+    permissions:
+      pull-requests: write
+    steps:
+      - name: Assign reviewer based on weighted random selection
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const reviewers = [
+              { username: 'komagata', weight: 3 },
+              { username: 'okuramasafumi', weight: 2 }
+            ];
+            
+            // Create weighted array
+            const weightedArray = [];
+            reviewers.forEach(reviewer => {
+              for (let i = 0; i < reviewer.weight; i++) {
+                weightedArray.push(reviewer.username);
+              }
+            });
+            
+            // Select random reviewer
+            const randomIndex = Math.floor(Math.random() * weightedArray.length);
+            const selectedReviewer = weightedArray[randomIndex];
+            
+            // Get PR author
+            const prAuthor = context.payload.pull_request.user.login;
+            
+            // Don't assign the PR author as reviewer
+            if (selectedReviewer === prAuthor) {
+              console.log('Selected reviewer is the PR author, skipping assignment');
+              return;
+            }
+            
+            // Assign reviewer
+            await github.rest.pulls.requestReviewers({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.issue.number,
+              reviewers: [selectedReviewer]
+            });
+            
+            console.log(`Assigned ${selectedReviewer} as reviewer`);
\ No newline at end of file