Adding support for Swift Package Plugins

[polpielladev]

Hi everyone! 👋

After speaking to @krzysztofzablocki, we decided that it would be good to get my [sourcery-plugins]() repo into the Sourcery's main repository.

I will be looking at this piece of work shortly, which will involve the following work:

• [x] Modify the release code to include a Sourcery.artifactbundle artefact for the plugins to use. Could potentially use the executable target instead? Not sure how that will play with a pre-build build tool plugin but should be okay for the command one?
• [x] Move the command plugin from the [sourcery-plugins]() repo over to Sourcery's main repo.
• [x] Add support for the upcoming Xcode command plugins.
• [ ] Investigate how much work there would be to create a build tool plugin. This has a fair amount of challenges with directory paths and permissions, but should be doable. I have a working version locally which overcomes all hurdles except one last one which must be further investigated.

At the end of this work, Sourcery's consumers will be able to use the tool as a Swift Package Plugin.

[Nikoloutsos]

Kudos @pol-piella. Nice article

[krzysztofzablocki]

BTW @pol-piella you might be able to use cache path argument for the sandbox issue

[polpielladev]

BTW @pol-piella you might be able to use cache path argument for the sandbox issue

Awesome! 🎉 I am nearly done with the first PR, will add support for that before I open it 🚀

[eddiekaiger]

Any updates on the build plugin?

[markst]

@polpielladev does this change anything for you? #1150

[polpielladev]

Don't have a lot of bandwidth to look into this at the moment but I was planning on having a go again at trying to implement the build plugin.

I will see if I can find some time this weekend to have a play and I can report on the outcome 👀

[BrentMifsud]

any updates on this? Trying to get rid of mint from our CI and this is the last build plugin we need.