Twisted 15 dropped support for it, which causes Travis CI tests to fail on 2.6.
We still theoretically support older versions of Twisted, so perhaps we should
configure Travis to test with those? I think we should drop Python 2.6 in any
case since distros are all on 2.7 now.
I'm leaving Travis running (and ignoring) the failing PyPy tests because I
don't know why that is there.
Travis builds of branches (i.e. pull-requests) were testing the wrong
thing, because the 'git pull' was causing current trunk to be
auto-merged. At least that's what seemed to break
https://travis-ci.org/tahoe-lafs/tahoe-lafs/jobs/81517826 : it hung
forever waiting for a commit message to be entered.
Also add "sudo: false" to use travis containers (faster) instead of new
VMs. We only use pip to install dependencies, not apt, so we don't need
root.
This reverts commit cec7727bf9.
It caused travis (for py2.7) to fail on these tests:
* allmydata.test.test_runner.BinTahoe.test_version_no_noise
* allmydata.test.test_runner.RunNode.test_client_no_noise
* allmydata.test.test_system.SystemTest.test_filesystem_with_cli_in_subprocess
According to https://github.com/travis-ci/travis-ci/issues/2788 (which
was WONTFIXED), roughly half the travis-ci buildserver fleet runs off
tmpfs volumes, which have different notions of space-free and space-used
than real filesystems. We've adapted our tests to avoid relying upon
space-used>0, and no longer need this call to investigate the problem.
refs ticket:2290
