upgrade: Install python3-yaml as needed.

3314fefaec started needing `python3-yaml`, but incorrectly claimed
that it was always an indirect dependency; it is a dependency of
`ubuntu-minimal` on 20.04, but not required on 18.04 or Debian.  We
cannot install it in puppet because then is definitionally too late;
it is needed at load time by `zulip-puppet-apply`.

Install `python3-yaml`, but guarded by a simple check so as to not
further slow most installs.

Fixes #18179.
This commit is contained in:
Alex Vandiver 2021-04-21 09:52:56 -07:00 committed by GitHub
parent 4c8502f7fd
commit de41a10d38
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@ -160,6 +160,12 @@ if not args.skip_puppet:
subprocess.check_call(["apt-get", "update"])
subprocess.check_call(["apt-get", "-y", "upgrade"])
# To bootstrap zulip-puppet-apply, we need to install the system yaml
# package; new installs get this, but old installs may not have it.
if not os.path.exists("/usr/share/doc/python3-yaml"):
logging.info("Installing system YAML package, for puppet...")
subprocess.check_call(["apt-get", "install", "python3-yaml"])
if not os.path.exists(os.path.join(deploy_path, "zproject/prod_settings.py")):
# This is normally done in unpack-zulip, but for upgrading from
# zulip<1.4.0, we need to do it. See discussion in commit 586b23637.