Adding instructions for anaconda install

[hulsed]

Adding docs page for installing anaconda within anaconda per our discussion here: #2821. It may require some nudging to fit within the rest of the documentation, but I've verified the process on an otherwise blank windows machine (perhaps this should be titled as windows-only? I am not sure how ).

• Docs page added for anaconda installation
• See: Provide ability to call gaphor console externally #2821

PR Checklist

Please check if your PR fulfills the following requirements:

• I have read, and I am following the Contributor guide
• I have read, and I understand the GNOME Code of Conduct

PR Type

What kind of change does this PR introduce?

• Bug fix
• Feature
• Chore (refactoring, formatting, local variables, other cleanup)
• Documentation content changes

What is the current behavior?

Currently, it's difficult to work with gaphor from an external python console without a full development install which may require root permissions. This provides instructions for installing gaphor in an anaconda environment so can install and work with gaphor modules without root permissions.

Issue Number: #2821

What is the new behavior?

This commit adds instructions for working in an anaconda environment.

Does this PR introduce a breaking change?

• Yes
• No

Other information

[danyeaw]

Hi @hulsed, thanks so much for the contribution! If libadwaita and gtksourceview5 aren't available with anaconda what is the result of this environment? Are able to successfully install Gaphor and run scripts, but not able to launch Gaphor itself?

[hulsed]

@danyeaw I added some language here that I hope explains that better. Unfortunately, I haven't really been able to demo this extensively to see what I can/can't do, but I can say:

• it lets you interact with some gaphor classes like SysML, ElementFactory, and ModelingLanguageService
• interacting with Session does not work, ostensibly because it wants gtk inspection. The error it gives is:
  

I'd like to characterize what you can and can't do here a bit better, but unfortunately--if I get a bit further working with this, perhaps I could perform some tests/searches and make a list or diagram?

[danyeaw]

Thanks so much for the contribution @hulsed! I think over time we can figure out if using Anaconda or some other solution is best for your use case, but I think adding some initial docs for the Anaconda crowd is great 👍. Maybe we need to work to get libadwaita and gtksourceview packaged.

[danyeaw]

@all-contributors please add @hulsed for docs

[allcontributors]

@danyeaw

I've put up a pull request to add @hulsed! 🎉