Ucube utils

[pp-mo]

Tidied and pulled in the code that I wrote for the recent demo, mainly supporting the mesh subset operations based on gridded/UGRID.

I included everything from there, and added at least one simple test for each function.

This needs a new image test-iris-imagehash and a new testfile in iris-test-data,
so it won't pass tests until both of these PRs are in :

• Ucube plot test-iris-imagehash#32
• Face-mapped data for ugrid testing. iris-test-data#57

WIP
still todo: fix iris-test-data SHA in Travis, when SciTools/iris-test-data#57 is done.

[pp-mo]

I don't understand why no tests are running.
@trexfeathers @bjlittle @lbdreyer do we know why this is ?

Tests are still running on my fork : https://travis-ci.org/github/pp-mo/iris/builds/669350910
(failing because iris-test-data + test-iris-imagehash need updating)

Tests are also not running in test-iris-imagehash, either ...

[lbdreyer]

I think they are running (see here for the results of the travis run for this PR), but for some reason travis isn't sending the results back to github?

[pp-mo]

@lbdreyer I think they are running ... travis isn't sending the results back to github?

Thanks @lbdreyer
That is somewhat comforting, but still pretty odd.
I'd guess that GitHub would be at fault, since it is at least triggering them (if I understand how it works, which I don't)
I'll look into it ..

[pp-mo]

Update: the testing problem is not a "glitch".
New PR with extra commit on a different branch-name just repeats the problem : #3693
Plus, same is happening in test-iris-imagehash : SciTools/test-iris-imagehash#32 (comment)

[pp-mo]

Created PR with small changes to this, in own repo (since merged, so appears here) : pp-mo#60

In this, on own fork, same thing of the PR not linking to the Travis tests.

[pp-mo]

pp-mo#60 on own fork, same thing of the PR not linking to the Travis tests.

Something has changed, I'm struggling to t know how to chase this...
dask+pandas Github projects/repos are not having these problems,
But our own test-iris-imagehash is, even though it has a totally different + much simpler .travis.yml.
I guess we may need to look for something similar between iris + test-iris-imagehash travis configs?

[trexfeathers]

Sorry @pp-mo I haven't quite finished looking at this. But I do know that you'll need to update the test data ref in travis.yml to the latest commit from iris-test-data PR 57. Catch you next week!

[trexfeathers]

pp-mo#60 on own fork, same thing of the PR not linking to the Travis tests.

Something has changed, I'm struggling to t know how to chase this...
dask+pandas Github projects/repos are not having these problems,
But our own test-iris-imagehash is, even though it has a totally different + much simpler .travis.yml.
I guess we may need to look for something similar between iris + test-iris-imagehash travis configs?

I just re-ran the Travis tests and now I've got that information back on this PR. In order to re-run the tests I had to log out of Travis and log back in since the restart button wasn't there the first time. I don't know whether it was the log-in or the re-run that has fixed it for me.

[pp-mo]

I just re-ran the Travis tests and now I've got that information back on this PR

Thanks for persevering -- this is great news!
I was really worried that fixing this might long+complicated.

[pp-mo]

In theory, if I now just install the latest iris-test-data SHA in .travis.yml, this will then pass ...

[trexfeathers]

This all looks great, thanks @pp-mo!