FR: Setup CI testing

[newlandsvalley]

FR: Setup CI testing

[rhofour]

I just added this for one of my repos: https://github.com/rhofour/elm-pairing-heap

Even without unit tests I think there are some benefits here.

1. It can check both the main project and all the examples build
2. It can enforce elm-format use (See #10 )

And of course when I get around to adding unit tests it can enforce those too.

[newlandsvalley]

Yes - I would very much like to do this (for nearly all my repos - particularly Elm and PureScript). Do you know of a good tutorial?

[rhofour]

Unfortunately not, especially for Elm where there are some important tricks that bring the build times down from minutes to seconds.

The other big issue is replicating what Travis CI is doing locally feels particularly difficult and poorly documented. Especially for something that's supposed to be clean and repeatable. The best I found for that was this stack overflow answer which isn't very satisfying, but at least worked.

My plan was to copy over the config from my other project, remove elm-test, and add in the steps to build the various examples.

[rhofour]

I'll probably have a PR to add this in a couple of hours.

[newlandsvalley]

Yes - it's always seemed like a black art to me. Do I need to run my own local Travis? I'll have to buckle down to try to learn it somehow. How do you get the nice 'build passing' logo on the README? The makefile is a great improvement. I hope the CI setup goes OK. I'll take a look tomorrow.

[rhofour]

You don't need to run your own local one. It seems like the intended workflow is you copy someone else's .travis.yml file, you upload it, wait for it to fail to build, then debug from there. Running it locally seems like a much more sane way to get started, but it's certainly not easier.

The logo is just a special image link you can easily find on travis-ci.org.

It looks like I can't enable Travis CI for this repo so I'll do it for my fork then send you the PR. It should be pretty easy for you to enable it on this repo at travis-ci.org. Then all you'll have to do is update the image in the README.

[newlandsvalley]

Fixed, courtesy of @rhofour via 049f82d. Very many thanks!