🐳 chore(sync workflow): 增强同步工作流，添加比较哈希和同步信息步骤

Author: gongfuture

.github/workflows/sync-upstream.yml

@@ -6,8 +6,52 @@ on:
   workflow_dispatch:    # 支持手动触发
 
 jobs:
+  check:
+    runs-on: ubuntu-latest
+    outputs:
+      need_sync: ${{ steps.compare.outputs.need_sync }}
+      upstream_hash: ${{ steps.compare.outputs.upstream_hash }}
+      current_hash: ${{ steps.compare.outputs.current_hash }}
+    steps:
+      - name: Checkout up-sync branch
+        uses: actions/checkout@v4
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+          fetch-depth: 0
+          ref: up-sync
+
+      - name: Add upstream remote
+        run: git remote add upstream https://github.com/ddnet/ddnet-maps
+
+      - name: Fetch upstream
+        run: git fetch upstream
+
+      - name: Compare commit hashes
+        id: compare
+        run: |
+          # 获取当前 up-sync 分支的 commit hash
+          CURRENT_HASH=$(git rev-parse HEAD)
+          echo "current_hash=$CURRENT_HASH" >> $GITHUB_OUTPUT
+          echo "当前 up-sync 分支 commit hash: $CURRENT_HASH"
+          
+          # 获取 upstream/master 的 commit hash
+          UPSTREAM_HASH=$(git rev-parse upstream/master)
+          echo "upstream_hash=$UPSTREAM_HASH" >> $GITHUB_OUTPUT
+          echo "upstream/master commit hash: $UPSTREAM_HASH"
+          
+          # 比较两个 hash 是否相同
+          if [ "$CURRENT_HASH" = "$UPSTREAM_HASH" ]; then
+            echo "need_sync=false" >> $GITHUB_OUTPUT
+            echo "✅ commit hash 相同，无需同步"
+          else
+            echo "need_sync=true" >> $GITHUB_OUTPUT
+            echo "🔄 commit hash 不同，需要同步"
+          fi
+
   sync:
     runs-on: ubuntu-latest
+    needs: check
+    if: needs.check.outputs.need_sync == 'true'
     permissions:
       contents: write
     steps:
@@ -24,6 +68,12 @@ jobs:
       - name: Fetch upstream
         run: git fetch upstream
 
+      - name: Show sync information
+        run: |
+          echo "🔄 开始同步..."
+          echo "当前分支: $(git rev-parse HEAD)"
+          echo "目标分支: $(git rev-parse upstream/master)"
+
       - name: Hard reset up-sync to upstream/master
         run: |
           git reset --hard upstream/master
@@ -32,4 +82,9 @@ jobs:
         run: |
           git push origin up-sync --force
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Sync completed
+        run: |
+          echo "✅ 同步完成！"
+          echo "新的 commit hash: $(git rev-parse HEAD)"