Add test/clean.sh script

[md5]

Fixes #638

[tianon]

OMG when were wildcards implemented in docker images, and why didn't I notice??

[md5]

No idea, but I figured I'd test it to see if it worked. It's kind of surprising given that docker images image:tag and docker images ID don't work.

[tianon]

LGTM, but I'm still reeling from the fact that I somehow missed such a great feature that's clearly working in Docker 1.5.0!

[tianon]

So far, my digging shows it's been there since at least as far back as 1.2.0; still digging to see how deep this rabbit hole goes.

[tianon]

0.10.0 😳

[tianon]

This feature goes all the way back to Docker 0.6.2, and was added in moby/moby#1817.

[tianon]

BTW, the "trail" I followed to find that PR was graph/list.go, server/image.go, server/server.go, server.go (every file that line of code has moved through)

[yosifkit]

Can we do a little changing here, to get rid of tags instead of images? Images will go away, but only if nothing else is using it.

docker images 'librarytest/*' | awk 'NR>1 { print $1":"$2 }' | xargs -r docker rmi

[tianon]

Ah, good point; there is also a possibility (however slim) that one of our librarytest images is the same layer as another legitimate image that's not ours, especially since the Dockerfiles will usually be really simplistic. :innocent:

[md5]

Updated to only remove tags instead of images themselves. Too bad there isn't just a docker untag.

[md5]

Of course, this introduces another GNU-ism (xargs -r) that makes it impossible to run the official-images scripts easily under OS X.

[tianon]

OS X should just adopt the GNU 😺

[tianon]

(I'm OK with skipping the -r, but it does remove the docker: "rmi" requires a minimum of 1 argument. See 'docker rmi --help'. error nicely.)

[md5]

I love GNU, I really do, but I don't see OS X doing that. I should probably just go back to Linux.

I'll leave the xargs -r there since there are already readlink -f and a few other GNU-isms and Bash 4 things that make other scripts in this repo not work under OS X.

[tianon]

Ok, fair enough. ❤️

LGTM

[yosifkit]

LGTM

[md5]

I just realized this is going to choke if someone creates an image in the librarytest/* namespace without a tag. The awk command will return librarytest/foo:<none>, which will make docker rmi sad 😢

[md5]

Or perhaps Docker just doesn't allow what I'm saying, since it defaults to tagging as latest.

[tianon]

That's the one 👍

[tianon]

(Sans the new v2 digests thing)