1. Package Manager
  2. Getting Started

Creating a Grasshopper Plug-In Package

by Will Pearson (Last modified: 04 Jan 2021)

This is a step by step guide to creating a package for a Grasshopper plug-in (.gha).

The Package Manager is a new feature in Rhino 7 WIP. It makes it easier to discover, install and manage Grasshopper plug-ins from within Rhino. This guide will describe how to create a package from a Grasshopper plug-in that can be published to the package server.

First, let’s assume you have a folder on your computer which contains all the files that you would like to distribute in your package. Something like this…

C:\Users\Bozo\dist
├── Marmoset.gha
├── Marmoset.dll
└── misc\
    ├── README.md
    └── LICENSE.txt

We’re going to use the Yak CLI tool to create the package, so open up a Command Prompt and navigate to the directory above.

> cd C:\Users\Bozo\dist

Now, we need a manifest.yml file! You can easily create your own by studying the Manifest Reference Guide. Alternatively, you can use the spec command to generate a skeleton file. We’ll do the latter here.

> "C:\Program Files\Rhino 7\System\Yak.exe" spec

Inspecting content: Marmoset.gha

---
name: marmoset
version: 1.0.0
authors:
- Park Ranger
description: >
  This plug-in does something. I'm not really sure exactly what it's supposed to
  do, but it does it better than any other plug-in.
url: https://example.com


Saved to C:\Users\Bozo\dist\manifest.yml

The spec command takes a look at the current directory and, if present, will glean useful information from the .gha assembly and use it generate a manifest.yml with name, version, authors, etc. pre-populated. If you haven’t added this information, then placeholders will be used.

Open the manifest file with your favourite editor and fill in the gaps.

Afterwards, you should have something that looks a little like this…

---
name: marmoset
version: 1.0.0
authors:
- Park Ranger
description: >
  This plug-in does something. I'm not really sure exactly what it's supposed to
  do, but it does it better than any other plug-in.
url: https://example.com
keywords:
- mammal

Now that we have a manifest file, we can build the package!

> "C:\Program Files\Rhino 7\System\Yak.exe" build

Building package from contents of C:\Users\Bozo\dist

Found manifest.yml for package: marmoset (1.0.0)
Inspecting content: Marmoset.gha
Creating marmoset-1.0.0-rh6_18-any.yak

---
name: marmoset
version: 1.0.0
authors:
- Will Pearson
description: >
  This plug-in does something. I'm not really sure exactly what it's supposed to
  do, but it does it better than any other plug-in.
url: example.com
keywords:
- mammal
- guid:c9beedb9-07ec-4974-a0a2-44670ddb17e4

C:\Users\Bozo\dist\marmoset-1.0.0-rh6_18-any.yak
├── Marmoset.dll
├── Marmoset.gha
├── manifest.yml
├── misc\LICENSE.txt
└── misc\README.md

Congratulations! 🙌 You’ve just created a package for your Grasshopper plug-in.

Next Steps

Now that you’ve created a package, push it to the package server to make it available in the package manager!