Touhou LostWord Resource Extractor

This is a tool which can manage different versions of touhou lostword resources and incrementally download/extract them.

It uses several files to record history versions. When there comes a new resource version, it will automatically remove deprecated bundle files and only download/extract new ones.

The usage:

mkdir download_dir
mkdir dicts_dir
mkdir output_dir
python3 main.py download_dir dicts_dir output_dir

It will create four files in dicts_dir:

1. asset_list.csv: the files that need to be extracted, which contains: file type (an integer), the uppermost output directory, inner output directory, output file name (so the output file path will be output_dir/out_dir/out_subdir/output_file_name), the bundle file name that containing it
2. bundle_dict.csv: all the bundle files in manifest that need to be download and processed, containing both the file name and hashcode
3. new_download_files.txt: the new bundle file names compared to the last resource version. We only need to download and extract from these files this time
4. env_info.txt: containing miscellaneous human-readable information that is used to extract the files above, such the download url prefix and the supported asset file types

Please do not delete all the files in the directories by hand because the script itself should manage them.