MRPackDownloader

A tool/script to download content from a modrinth modpack (.mrpack files). It extracts and saves all mods, resource packs, and other assets listed in the modpack.

Image

The tool downloading assets from the Performium Modpack with a deliberate 404 on one of the mods.

Requirements

• Go 1.18+

Usage

1. Run the following:

   go install github.com/nxrmqlly/MRPackDownloader@latest

   • or, Get the latest binary from the Releases Tab

2. Open your <modpack>.mrpack file using 7Zip, WinRAR or similar and extract it.

3. Run the script:

   mrpackdownloader 

4. Enter the path to the modrinth.index.json file (from the modpack) OR paste the contents of it into ./modrinth.index.json (created automatically)

• Alternatively, you can run it with command line arg:

  ./mrpackdownloader path/to/modrinth.index.json

Building

Build a binary with the following.

git clone https://github.com/nxrmqlly/MRPackDownloader
cd MRPackDownloader
go mod tidy
go build -o mrpackdownloader .

How?

• Modrinth modpacks are just compressed archives, and you can open them using software like 7Zip or WinRAR.
• All this script does is read the modrinth.index.json file and save all the mods, resourcepacks etc.
• Files are saved in the output/ directory, preserving the folder structure.

Contributing

Contributions are welcome! Please ensure your code follows best practices and includes necessary documentation.

License

MIT License