Merge ~johnsca/layer-snap:bug/version-split into ~stub/layer-snap:master

[Cory Johns]

The new version of snapd (2.43) adds a `host` line to the output of `snap version` which can include multiple spaces if running on KVM.

Fixes https://bugs.launchpad.net/layer-snap/+bug/1859211

[Stuart Bishop (stub)]

Ta. Better to be defensive.

We probably still need snapd upstream to alter the format so old code continues to work, and a test to catch regressions; production deploys of the existing code will remain live for years ahead.

review: Approve

diff --git a/reactive/snap.py b/reactive/snap.py
index 89d12c4..882280a 100644
--- a/reactive/snap.py
+++ b/reactive/snap.py
@@ -232,7 +232,7 @@ def _get_snapd_version():
         stdin=subprocess.DEVNULL,
         universal_newlines=True
     )
-    version_info = dict(line.split() for line in stdout.splitlines())
+    version_info = dict(line.split(None, 1) for line in stdout.splitlines())
     return LooseVersion(version_info['snapd'])