Follow up to 8769f03c, which allows the undefined var error to be raised
if we're getting vars with a full context (play/host/task) and the host
has already gathered facts. In this way, vars_files containing variables
that fail to be templated are not silently ignored.
This fixes a failing unit test.
In actual use (which is still quite far), I'm not sure if bytes ->
unicode conversion should be done here (in which case the code will fail
with an AttributeError: 'bytes' object has no attribute 'readlines'), or
inside self._connection.exec_command() (in which case my change is
correct).
Now, instead of relying on hostvars on the executor side, we compile
the vars for the delegated to host in a special internal variable and
have the PlayContext object look for things there when applying task/
var overrides, which is much cleaner and takes advantage of the code
already dealing with all of the magic variable variations.
Fixes#12127Fixes#12079
* Clearing interpreter settings from variables, so those set for the
original host aren't incorrectly applied to the delegated to host
* Fixed incorrect string for remote user in delegated hosts hostvars
* Properly looking for multiple possiblities in the delegated-to hosts
hostvars (ansible_ssh_host vs. ansible_host)
Use six.moves.range instead (aliased to xrange on Python 2, aliased to
range on Python 3).
Also I couldn't resist replacing the elaborate chr/ord/randrange dance
with the simpler random.choice(string.ascii_lowercase) that was already
used elsewhere in the Ansible codebase.
The earlier distinction was never used; .ipv6_address was always a copy
of .ipv4_address, and the latter was always used to set the remote_addr
field in the PlayContext.
Also uses the canonical ansible_host/ansible_port names when setting the
address and port from variables.
The earlier-recommended "pat1:pat2:pat3[x:y]" notation doesn't work well
with IPv6 addresses, so we recommend ',' as a separator instead. We know
that commas can't occur within a pattern, so we can just split on it.
We still have to accept the "foo:bar" notation because it's so commonly
used, but we issue a deprecation warning for it.
Fixes#12296Closes#12404Closes#12329
