systemd: support disabling cloud-init via file or kernel cmdline

This adds a systemd generator for a 'cloud-init.target'.  That target will
be WantedBy multi-user.target in the default case.  If there is a file
/etc/cloud/cloud-init.disabled or the kernel command line contains
'cloud-init=disabled' then cloud-init will not affect boot at all.

There are some packages/debian changes to affect this:
 * postinst, preinst: these are necessary to remove some
   old target files for multi-user.target (LP: #1552999)
 * changes to include these files in the debian source package.
 * rules.in: supports DEB_BUILD_OPTIONS=nocheck to not run check

setup.py: mostly changes to support installing the generator
          but also pep8 fixes along the way

systemd/*: make each of the services 'WantedBy=cloud-init.target'
           rather than being wanted by multi-user.target

1 files changed, 6 insertions, 5 deletions

diff --git a/packages/bddeb b/packages/bddeb
index c4efe264..c141b1ab 100755
--- a/packages/bddeb
+++ b/packages/bddeb
@@ -1,5 +1,6 @@
 #!/usr/bin/env python3
 
+import glob
 import os
 import shutil
 import sys
@@ -105,11 +106,11 @@ def write_debian_folder(root, version, revno, pkgmap,
                              util.abs_join(deb_dir, 'rules'),
                              params={'python': python, 'pyver': pyver})
 
-    # Just copy the following directly
-    for base_fn in ['dirs', 'copyright', 'compat']:
-        shutil.copy(util.abs_join(find_root(),
-                                  'packages', 'debian', base_fn),
-                    util.abs_join(deb_dir, base_fn))
+    # Just copy any other files directly (including .in)
+    pdeb_d = util.abs_join(find_root(), 'packages', 'debian')
+    for f in [os.path.join(pdeb_d, f) for f in os.listdir(pdeb_d)]:
+        if os.path.isfile(f):
+            shutil.copy(f, util.abs_join(deb_dir, os.path.basename(f)))
 
 
 def main():