Add tutorial checker

tutorial/check_tutorial.py

@@ -0,0 +1,56 @@
+import glob
+import os.path
+import re
+
+
+def main():
+    cpp_files = glob.glob("*.cpp")
+    check_presence_in_cmakelists(cpp_files)
+    check_contents_in_readme(cpp_files)
+
+
+def check_presence_in_cmakelists(cpp_files):
+    with open("CMakeLists.txt", "r") as f:
+        cmake_content = f.read()
+    for cpp_file in cpp_files:
+        cpp_target = os.path.splitext(cpp_file)[0]
+        if cpp_target not in cmake_content:
+            print(f"Warning: {cpp_target} is not listed in CMakeLists.txt")
+
+
+def check_contents_in_readme(cpp_files):
+    with open("readme.md", "r") as f:
+        readme_content = f.read()
+    sources = extract_code_blocks(readme_content)
+    sources_names = sorted([fname for fname in sources.keys()])
+
+    check_file_lists(cpp_files, sources_names)
+
+    check_file_contents(cpp_files, sources)
+
+
+def extract_code_blocks(readme_content):
+    # Match: "(`filename.cpp``):\n```c++(...)```"
+    pattern = r"\(`([a-zA-Z0-9_]+\.cpp)`\):\s*```c\+\+\s*([\s\S]*?)```"
+    return dict(re.findall(pattern, readme_content))
+
+
+def check_file_lists(cpp_files, readme_files):
+    sym_diff = list(set(cpp_files) ^ set(readme_files))
+    if sym_diff:
+        print("The following files are mismatched between readme.md and the directory:")
+        for fname in sym_diff:
+            print(f"  {fname}")
+
+
+def check_file_contents(cpp_files, sources):
+    for cpp_file in cpp_files:
+        with open(cpp_file, "r") as f:
+            code_in_file = f.read()
+        code_in_readme = sources.get(cpp_file, "")
+        if code_in_file != code_in_readme:
+            print(f"Warning: Content mismatch for {cpp_file} between file and readme.md")
+
+
+if __name__ == '__main__':
+    main()