We publish some artifacts from this repository, which are specific to
an OS. In the past, we only had a single Linux leg and so we did not
need any additional conditional logic.
However, we now have multiple Linux legs (across different node
versions) running in parallel, so if we try to publish the same
artifacts at the same time, we can run into issues because two `aws s3
cp` jobs try to write to the same file at the same time.
Follow similar logic to our skips we do around publishing NPM and PyPI
packages here, as well.
Stop cloning pulumi/home. This doesn't work in Travis because public
repositories can not have private SSH keys, which we'd need to clone
this repository. All the scripts we consume from there are now in
pulumi/scripts and so we'll just consume them from there.
While it's safe to publish the tgz that we use internally for other
repositories that are on "the link plan" after the build completes, we
shouldn't publish packages to NPM and PyPi at that point. There are
two reasons for doing this:
1. Publishing packages before they are tested, which means we could
end up publishing packages that don't work.
2. NPM prevents publishing the same package more than once, so if we
had to re-run the job (due to tests failing for transient issues), the
publish step will start failing, preventing us from running the tests
at all.
