Add support for building snaps

[popey]

This tiny pull request adds support to build cumulonimbus as a snap.

cumulonimbus is already available in the snap store via the yaml in the snapcrafter which consumes the deb and pushes that into a snap. This PR takes a pleasant approach of using the built-in snap output of electron-builder.

If the PR is accepted, we can transfer ownership of the cumulonimbus snap to you, the upstream developer. Once done you could automatically upload the built snaps to the store using snapcraft push. With multiple channels in the store, you could have adventurous users get automatic updates to your latest pre-release builds of cumulonimbus, and provide feedback based on the latest build.

If accepted, I'm happy to walk you through the next steps.

[z-------------]

I'd be very happy to support building Cumulonimbus as a snap, but the problem I have been facing is that I can't seem to get Travis CI to do it without erroring — there are always problems with installing certain things required for building snaps.

Once I figure out how to get it working with Travis I'd be glad to merge this PR and take ownership of the snap.

Thanks!

[popey]

Yeah, it's a known problem with snaps being built on trusty travis images. Can you try building on a xenial image in travis?

[3v1n0]

In order to build a snap in travis you should use a xenial docker image.... You can see examples for that here https://github.com/nextcloud/client_theming/blob/master/.travis.yml and https://github.com/nextcloud/client_theming/blob/master/linux/travis-build.sh

However using http://build.snapcraft.io/ would be at this point way easier

[z-------------]

@3v1n0 I will look into using build.snapcraft.io. Thanks for the suggestion.

[Lvaskz]

hi, any advance?

[z-------------]

Hi @Lvaskz, this issue is pretty low on my priority list so I haven't made any progress yet. I will definitely get around to it some day, though.

[Lvaskz]

oh right