snap: allows for creating cloud-init snap

Add a basic snapcraft.yaml file to allow the execution of cloud-init as
a snap. This will always pull down the latest source from master for
the snap. setup.py will now also set the default init system to be
systemd when no other is passed to it.

3 files changed, 26 insertions, 3 deletions

diff --git a/.gitignore b/.gitignore
index 3946ec76..b0500a68 100644
--- a/.gitignore
+++ b/.gitignore
@@ -6,3 +6,7 @@ __pycache__
 .tox
 .coverage
 doc/rtd_html
+parts
+prime
+stage
+*.snap
diff --git a/setup.py b/setup.py
index e6693c90..32a44d94 100755
--- a/setup.py
+++ b/setup.py
@@ -138,9 +138,7 @@ class InitsysInstallData(install):
             self.init_system = self.init_system.split(",")
 
         if len(self.init_system) == 0:
-            raise DistutilsArgError(
-                ("You must specify one of (%s) when"
-                 " specifying init system(s)!") % (", ".join(INITSYS_TYPES)))
+            self.init_system = ['systemd']
 
         bad = [f for f in self.init_system if f not in INITSYS_TYPES]
         if len(bad) != 0:
diff --git a/snapcraft.yaml b/snapcraft.yaml
new file mode 100644
index 00000000..24e8e74d
--- /dev/null
+++ b/snapcraft.yaml
@@ -0,0 +1,21 @@
+name: cloud-init
+version: master
+summary: Init scripts for cloud instances
+description: |
+  Cloud instances need special scripts to run during initialisation to
+  retrieve and install ssh keys and to let the user run various scripts.
+
+grade: stable
+confinement: classic
+
+apps:
+  cloud-init:
+    # LP: #1669306
+    command: usr/bin/python3 $SNAP/bin/cloud-init
+    plugs: [network]
+
+parts:
+  cloud-init:
+    plugin: python
+    source-type: git
+    source: https://git.launchpad.net/cloud-init