tests: build the snapcraft snap in travis tests (canonical#1411)

.travis.yml

@@ -22,6 +22,8 @@ jobs:
     - script: if [ "$TRAVIS_EVENT_TYPE" != "cron" ]; then sudo ./tools/travis/run_tests.sh store; fi
     # CLA check, only in pull requests.
     - script: if [ "$TRAVIS_PULL_REQUEST" != "false" ] && [ "$TRAVIS_EVENT_TYPE" != 'cron' ]; then ./tools/travis/run_cla_check.sh; fi
+    - stage: snap
+      script: if [ "$TRAVIS_EVENT_TYPE" != "cron" ]; then sudo ./tools/travis/build_snapcraft_snap.sh; fi
     # Trigger edge tests, only in the daily cron.
     - stage: edge
       script: if [ "$TRAVIS_EVENT_TYPE" = "cron" ]; then ./runtests.sh spread; fi

tools/travis/build_snapcraft_snap.sh

@@ -0,0 +1,33 @@
+#!/bin/bash
+#
+# Copyright (C) 2015-2017 Canonical Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License version 3 as
+# published by the Free Software Foundation.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# Build the snapcraft snap.
+
+set -ev
+
+script_path="$(dirname "$0")"
+project_path="$(readlink -f "$script_path/../..")"
+
+lxc="/snap/bin/lxc"
+
+"$script_path/setup_lxd.sh"
+"$script_path/run_lxc_container.sh" snap-builder
+$lxc file push --recursive $project_path snap-builder/root/
+# TODO use the stable snap once it's published.
+$lxc exec snap-builder -- sh -c "apt install squashfuse && snap install snapcraft --candidate --classic"
+$lxc exec snap-builder -- sh -c "cd snapcraft && /snap/bin/snapcraft"
+
+$lxc stop snap-builder