Add ruby plugin

[cmatsuoka]

Port ruby plugin from Snapcraft PR: canonical/snapcraft#3511

Plugin needs to be reworked to validate an existing ruby interpreter or to use an interpreter built in a different part.

[paddor]

I've cloned craft-parts and created and registered the RubyPlugin. How do I test whether it works as a part in my app?

[paddor]

Using env PYTHONPATH=dev/oss/craft-parts/ python3 -mcraft_parts I can make it load the local repo of craft parts. But how do I use it with the snapcraft command?

[postmodern]

Any update on this? I'm struggling to create a snapcraft with certain gems pre-installed. The documentation for using the ruby plugin references core18, although core20 might work as a fallback?

[paddor]

Any update on this? I'm struggling to create a snapcraft with certain gems pre-installed. The documentation for using the ruby plugin references core18, although core20 might work as a fallback?

I have a working Ruby plugin for core20 I think. But it doesn't use craft-parts if I remember correctly. I can put it in a gist tomorrow.

[syncronize-issues-to-jira]

Thank you for reporting us your feedback!

The internal ticket has been created: https://warthogs.atlassian.net/browse/CRAFT-2925.

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[paddor]

@postmodern Not sure if I've ever posted that gist. Here it is: https://gist.github.com/paddor/b03b3c500a00ed05cbb4a6c247bec900