ci: appoint PR reviewers via action bot reviews

Author: kurisaW

.github/label-reviewers.json

@@ -0,0 +1,7 @@
+{
+    "arduino": "@mysterywolf, @Rbb666, @kurisaW",
+    "action": "@supperthomas",
+    "Kernel": "@BernardXiong",
+    "BSP: Cvitek": "@unicornx",
+    "BSP: Renesas": "@Rbb666, @kurisaW"
+  }

.github/workflows/auto-assign-reviewers.yml

@@ -0,0 +1,98 @@
+name: Auto Comment and Mention Reviewers Based on Labels
+
+on:
+  pull_request:
+    types:
+      - labeled
+      - synchronize
+      - opened
+
+jobs:
+  auto-comment:
+    runs-on: ubuntu-latest
+
+    steps:
+      - name: Check out code
+        uses: actions/checkout@v2
+
+      - name: Get PR labels
+        id: pr_labels
+        env:
+          GH_TOKEN: ${{ secrets.GITHUB_TOKEN_REVIEWER }}
+        run: |
+          # 获取 PR 标签
+          LABELS=$(curl -s -H "Authorization: token ${{ secrets.GITHUB_TOKEN_REVIEWER }}" \
+            https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/labels | jq -r '.[].name' | tr '\n' ' ')
+          echo "Labels: $LABELS"
+          echo "LABELS=$LABELS" >> $GITHUB_ENV
+
+      - name: Load label-reviewers mapping from JSON file
+        id: load-mapping
+        run: |
+          # 读取仓库中的标签与审核者映射文件
+          MAPPING_FILE=".github/label-reviewers.json"
+  
+          if [ ! -f "$MAPPING_FILE" ]; then
+            echo "Mapping file not found!"
+            exit 1
+          fi
+  
+          # 使用 jq 直接从 JSON 文件中读取并获取数据
+          LABELS_TO_REVIEWERS=$(cat $MAPPING_FILE)
+
+          # 输出到文件供后续步骤使用
+          echo "$LABELS_TO_REVIEWERS" > labels_to_reviewers.json
+
+      - name: Prepare reviewer mappings
+        id: reviewer-mappings
+        run: |
+          # 获取 PR 标签并确定需要的审核者
+          REQUIRED_REVIEWERS=()
+
+          # 遍历 PR 标签，并为每个标签添加相应的审核者
+          for label in $(echo "${{ env.LABELS }}" | tr " " "\n"); do
+            # 使用 jq 从 JSON 文件中获取审核者
+            REVIEWERS=$(jq -r --arg label "$label" '.[$label] // empty' labels_to_reviewers.json)
+
+            if [ -n "$REVIEWERS" ]; then
+              # 将审核者添加到 REQUIRED_REVIEWERS 数组
+              for reviewer in $(echo $REVIEWERS | tr ',' '\n'); do
+                if [ -n "$reviewer" ]; then  # 检查是否为非空字符串
+                  REQUIRED_REVIEWERS+=("$reviewer")
+                fi
+              done
+            fi
+          done
+
+          # 使用 bash 数组去重
+          UNIQUE_REVIEWERS=($(echo "${REQUIRED_REVIEWERS[@]}" | tr ' ' '\n' | sort -u | tr '\n' ' '))
+
+          # 去除可能的空值并格式化审核者列表
+          REVIEWERS_LIST=$(echo "${UNIQUE_REVIEWERS[@]}" | tr -s '[:space:]' ' ' | sed 's/^ //;s/ $//')
+
+          echo "REVIEWERS_LIST=$REVIEWERS_LIST" >> $GITHUB_ENV
+
+      - name: Add comment and mention reviewers
+        run: |
+          REVIEWERS="${{ env.REVIEWERS_LIST }}"
+
+          if [ -z "$REVIEWERS" ]; then
+            echo "No reviewers to mention."
+          else
+            # 构建评论内容，避免空格和空审核者
+            COMMENT_BODY=$(jq -n --arg reviewers "$REVIEWERS" --arg labels "${{ env.LABELS }}" \
+              '{"body": "Hey \($reviewers), could you please review this PR? 😊\n\nThe following labels were applied:\n- \($labels)\n\nPlease check the changes carefully, and let us know if you need any further details. Thank you for your time!"}')
+            
+            # 添加评论
+            RESPONSE=$(curl -s -w "%{http_code}" -o /tmp/response.json -X POST \
+              -H "Authorization: token ${{ secrets.GITHUB_TOKEN_REVIEWER }}" \
+              -d "$COMMENT_BODY" \
+              https://api.github.com/repos/${{ github.repository }}/issues/${{ github.event.pull_request.number }}/comments)
+
+            # 检查 API 调用是否成功
+            HTTP_STATUS=$(echo "$RESPONSE" | tail -n1)
+            if [ "$HTTP_STATUS" -ne 201 ]; then
+              echo "Error posting comment. Response: $RESPONSE"
+              exit 1
+            fi
+          fi