如果markdown文本为空则初始化模版，修正新创建文件还没加入git管理时的username获取问题

.gitignore

@@ -59,3 +59,6 @@ target/
 .settings/**
 .project
 .pydevproject
+
+
+.DS_Store
\ No newline at end of file

src/skill_tree/exercises/init_exercises.py

+def simple_list_md_load(p):
+    with open(p, 'r', encoding='utf-8') as f:
+        lines = f.readlines()
+        result = []
+        for line in lines:
+            item = line.strip('\n')
+            result.append(item)
+        return result
+
+
+def simple_list_md_dump(p, lines):
+    with open(p, 'w', encoding='utf-8') as f:
+        f.write('\n'.join(lines))
+
+
+def emit_head(md):
+    title = '{在此填写标题}'
+    contents = ['{在此填写题目描述}']
+
+    md.append(f'# {title}')
+    md.append('')
+    for content in contents:
+        md.append(content)
+    md.append('')
+
+
+def emit_answer(md, language):
+    md.append(f'## 答案')
+    md.append('')
+    if language:
+        md.append(f'```{language}')
+        md.append('')
+        md.append('```')
+    else:
+        md.append('{在此填写答案}')
+    md.append('')
+
+
+def emit_options(md, language):
+    md.append(f'## 选项')
+    md.append('')
+
+    for tag in ['A', 'B', 'C']:
+        md.append(f'### {tag}')
+        md.append('')
+        if language:
+            md.append(f'```{language}')
+            md.append('')
+            md.append('```')
+        else:
+            md.append('{在此填写选项'+f'{tag}'+'}')
+        md.append('')

src/skill_tree/tree.py

@@ -9,6 +9,7 @@ import re
 from parsec import BasicState, ParsecError
 
 from .exercises.markdown import parse
+from .exercises.init_exercises import emit_head, emit_answer, emit_options, simple_list_md_dump
 
 id_set = set()
 logger = logging.getLogger(__name__)
@@ -36,6 +37,8 @@ def user_name(md_file, author_dict):
     for line in lines:
         if line.startswith('Author'):
             author_lines.append(line.split(' ')[1])
+    if len(author_lines) == 0:
+        return None
     author_nick_name = author_lines[-1]
     return search_author(author_dict, author_nick_name)
 
@@ -45,7 +48,8 @@ def load_json(p):
         try:
             return json.loads(f.read())
         except UnicodeDecodeError:
-            logger.info("json 文件 [{p}] 编码错误，请确保其内容保存为 utf-8 或 base64 后的 ascii 格式。")
+            logger.info(
+                "json 文件 [{p}] 编码错误，请确保其内容保存为 utf-8 或 base64 后的 ascii 格式。")
 
 
 def dump_json(p, j, exist_ok=False, override=False):
@@ -374,19 +378,38 @@ class TreeWalker:
                 export.append(mfile)
                 flag = True
                 config["export"] = export
+
+            data = None
             with open(md_file, "r", encoding="utf-8") as efile:
                 try:
                     data = efile.read()
                 except UnicodeDecodeError:
                     logger.error(f"习题 [{md_file}] 编码错误，请确保其保存为 utf-8 编码")
                     sys.exit(1)
+
+            if data.strip() == '':
+                md = []
+                emit_head(md)
+                emit_answer(md, None)
+                emit_options(md, None)
+                simple_list_md_dump(md_file, md)
+
+            data = None
+            with open(md_file, "r", encoding="utf-8") as efile:
+                try:
+                    data = efile.read()
+                except UnicodeDecodeError:
+                    logger.error(f"习题 [{md_file}] 编码错误，请确保其保存为 utf-8 编码")
+                    sys.exit(1)
+
             state = BasicState(data)
             try:
                 doc = parse(state)
             except ParsecError as err:
                 index = state.index
                 context = state.data[index - 15:index + 15]
-                    logger.error(f"习题 [{md_file}] 解析失败，在位置 {index} [{context}] 附近有格式: [{err}]")
+                logger.error(
+                    f"习题 [{md_file}] 解析失败，在位置 {index} [{context}] 附近有格式: [{err}]")
 
         if flag:
             dump_json(os.path.join(section_path, "config.json"),
@@ -418,6 +441,8 @@ class TreeWalker:
                     meta["source"] = source
                 if "author" not in meta:
                     meta["author"] = user_name(md_file, self.authors)
+                elif meta['author'] is None:
+                    meta["author"] = user_name(md_file, self.authors)
                 if "type" not in meta:
                     meta["type"] = "code_options"