chore: develop -> master ff-only 머지 자동화 액션 추가

Author: whqtker

.github/workflows/ff-merge.yml

@@ -0,0 +1,59 @@
+name: FF-Only Merge to Master
+
+on:
+  pull_request_review:
+    types: [submitted]
+
+jobs:
+  ff-merge:
+    if: |
+      github.event.review.state == 'approved' &&
+      github.event.pull_request.base.ref == 'master' &&
+      github.event.pull_request.head.ref == 'develop' &&
+      github.event.pull_request.state == 'open'
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: 승인 상태 확인
+        id: approvals
+        uses: actions/github-script@v7
+        with:
+          script: |
+            const { data: reviews } = await github.rest.pulls.listReviews({
+              owner: context.repo.owner,
+              repo: context.repo.repo,
+              pull_number: context.payload.pull_request.number,
+            });
+
+            const latest = {};
+            for (const r of reviews) {
+              if (r.state !== 'COMMENTED') {
+                latest[r.user.login] = r.state;
+              }
+            }
+
+            const values = Object.values(latest);
+            const approved = values.filter(s => s === 'APPROVED').length >= 1;
+            const blocked = values.some(s => s === 'CHANGES_REQUESTED');
+
+            core.setOutput('ready', approved && !blocked ? 'true' : 'false');
+
+      - name: Checkout
+        if: steps.approvals.outputs.ready == 'true'
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.PAT }}
+          fetch-depth: 0
+
+      - name: Git 설정
+        if: steps.approvals.outputs.ready == 'true'
+        run: |
+          git config user.name "github-actions[bot]"
+          git config user.email "github-actions[bot]@users.noreply.github.com"
+
+      - name: FF-Only merge develop → master
+        if: steps.approvals.outputs.ready == 'true'
+        run: |
+          git checkout master
+          git merge --ff-only origin/develop
+          git push origin master