Go-github: Support deleting head branch of GitHub pull requests

[TomTucka]

add support for this new feature: https://help.github.com/en/articles/managing-the-automatic-deletion-of-branches

[stefansedich]

I might be blind but looking at the V3 Repositories API I cannot see this being part of it...

[TomTucka]

@stefansedich Yep! I have asked @GithubHelp on twitter. Will post a response when they reply

[TomTucka]

Confirmed by @githubhelp on twitter that this is not in the v3 or v4 API. They are going to check if its on the engineering teams roadmap.

[gmlewis]

Closing due to lack of support in the v3 API. Please reopen if it becomes supported.

[cmardonespino]

@TomTucka Amigo, exists new news about this? I think that it could be pretty usefull if this feature is support for terraform!

[eriksw]

@gmlewis Please reopen—GitHub seem to have added this to the api.

Looking at the documentation I see delete_branch_on_merge as a parameter for repo create and edit.

[gmlewis]

Cool! Thank you, all!

This would be a great PR for any new contributor to this repo or a new Go developer.
All contributions are greatly appreciated!

Feel free to volunteer for any issue and the issue can be assigned to you so that others don't attempt to duplicate the work.

Please check out our CONTRIBUTING.md guide to get started.

Thank you!

[stefansedich]

@gmlewis I will pick this up been waiting for the API change long enough may as well see it home :smile: can you assign it to me? will try get to it over the weekend.

[gmlewis]

Thank you, @stefansedich! It's yours.

[TomTucka]

@stefansedich Can you ping me when this is done? or I can do it if you want? I'd like to add support for this to the terraform provider for GitHub

[stefansedich]

Sorry @TomTucka was out all weekend, only just sat down and got the PR up!

[stefansedich]

@TomTucka I don't mind picking up the Terraform module side once #1388 gets merged.