enforce linting policy and require check before PR

Author: baobao1270

.github/workflows/lint.yml

@@ -0,0 +1,17 @@
+name: Lint Database
+on: [push, pull_request]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Lint Database
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-node@v3
+        with:
+          node-version: 16
+      - uses: actions/setup-python@v4
+        with:
+          python-version: '3.10' 
+      - run: npm i -g wrangler
+      - run: python3 make.py

database.txt

@@ -247,4 +247,4 @@
 肆意流淌吧
 让世间到处盛开 无法定格的花
 才是盛夏
-        -- 举烛 《夏日降雨禁令》, 2022
+        -- 举烛 《夏日降雨禁令》, 2022

make.py

@@ -45,8 +45,16 @@ def print_file_size(filename: str):
 
 
 def load():
+    with open(FILENAMES.SOURCE_DATABASE, "rb") as f:
+        if b'\r' in f.read():
+            print(colored('red', 'Error:'), '数据库文件中不得包含 CR (\\r) 字符')
+            sys.exit(-2)
     with open(FILENAMES.SOURCE_DATABASE, encoding='utf-8') as f:
-        database = f.read().strip()
+        database = f.read()
+        if not database.endswith('\n'):
+            print(colored('red', 'Error:'), '数据库文件应该以 LF (\\n) 结尾')
+            sys.exit(-2)
+        database = database.strip()
         database = [i.strip() for i in database.split('-' * 30)]
         if (database[0] == '') or (database[-1] == ''):
             print(colored('red', 'Error:'), '遇到了空的歌词块 (quoteblock)')