Update for OpenStack Train

Update snap for Train versions of the OpenStack Client and
dependencies.

Use core18 as the base for the snap.

Drop misc commands that are no longer provided.

Use python3 as the interpreter for snapcraft builds.

Switch to microstack style LXD build with switch to core18
base.

Change-Id: I2e3dc49c2ddb6889a3bf3738002d03cbc87fa644

bindep.txt

@@ -1,2 +1 @@
-snapcraft [platform:dpkg]
 snapd [platform:dpkg]

snapcraft.yaml

@@ -1,5 +1,5 @@
 name: openstackclients
-version: rocky
+version: train
 summary: OpenStack Client tools
 description: |
   OpenStackClient (aka OSC) is a command-line client for OpenStack
@@ -14,6 +14,7 @@ description: |
   project specific command-line clients.
 confinement: classic
 grade: stable
+base: core18
 
 apps:
   openstack:
@@ -36,16 +37,12 @@ apps:
     command: bin/ceilometer
   cloudkitty:
     command: bin/cloudkitty
-  designate:
-    command: bin/designate
   freezer:
     command: bin/freezer
   glance:
     command: bin/glance
   heat:
     command: bin/heat
-  ironic:
-    command: bin/ironic
   magnum:
     command: bin/magnum
   manila:
@@ -101,7 +98,8 @@ parts:
       - python-openstackclient
       - gnocchiclient
       - python-octaviaclient
-    constraints: https://raw.githubusercontent.com/openstack/requirements/stable/rocky/upper-constraints.txt
+    constraints:
+      - https://raw.githubusercontent.com/openstack/requirements/stable/train/upper-constraints.txt
     build-packages:
       - libffi-dev
       - libssl-dev
@@ -113,6 +111,6 @@ parts:
       snapcraftctl prime
       # Now that everything is built, let's disable user site-packages
       # as stated in PEP-0370
-      sed -i usr/lib/python3.5/site.py -e 's/^ENABLE_USER_SITE = None$/ENABLE_USER_SITE = False/'
+      sed -i usr/lib/python3.6/site.py -e 's/^ENABLE_USER_SITE = None$/ENABLE_USER_SITE = False/'
       # This is the last step, let's now compile all our pyc files.
       ./usr/bin/python3 -m compileall .

tools/lxd_build.sh

@@ -0,0 +1,16 @@
+#!/bin/bash
+
+set -ex
+
+sudo apt update
+
+export PATH=/snap/bin:$PATH
+
+# Setup snapd and snapcraft
+sudo apt install -y snapd
+sudo snap install --classic snapcraft
+sudo snap install --classic lxd
+sudo lxd init --auto
+
+# Build our snap!
+sudo snapcraft --use-lxd

tox.ini

@@ -3,16 +3,16 @@ envlist = snap
 skipsdist = True
 
 [testenv]
-basepython = python3.5
+basepython = python3
 install_command = pip install {opts} {packages}
+setenv =
+    PATH = /snap/bin:{env:PATH}
 passenv = HOME TERM
 whitelist_externals =
     sudo
-    snapcraft
+    /snap/bin/snapcraft
 
 [testenv:snap]
 deps = -r{toxinidir}/requirements.txt
 commands =
-    sudo snap install core
-    snapcraft clean
-    snapcraft snap
+    {toxinidir}/tools/lxd_build.sh