[Bug 1794383] Re: ubuntu-cpc project: git empty directory handling

[Robert C Jennings]

Following the test case I have verified that the packaging change
produces the empty directory when imported into a git repository and re-
building the package.  Thank you.

** Tags removed: verification-needed verification-needed-xenial
** Tags added: verification-done verification-done-xenial

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https://bugs.launchpad.net/bugs/1794383

Title:
  ubuntu-cpc project: git empty directory handling

Status in livecd-rootfs package in Ubuntu:
  New
Status in livecd-rootfs source package in Xenial:
  Fix Committed

Bug description:
  We use a LP build recipe that includes livecd-rootfs.
  We are moving from bzr to git due to other projects moving to git.
  When we import livecd-rootfs into git it does not commit empty
  directories into the git tree.  The livecd-build/ubuntu-
  cpc/includes.chroot/etc/network/interfaces.d/ directory is dropped
  when we do this import.

  Foundations team would also like to move the upstream repositories to
  git including for stable releases, and this change would need to be
  made as part of this.

  [Impact]

   * Importing the package and committing it to a git repository
     drops empty directories from the ubuntu-cpc/includes.chroot tree
   * Images built in the ubuntu-cpc project drop this directory which
     is a regression

  [Test Case]

   * Create a bare git repo,
   * Pull the livecd-rootfs from xenial-updates into the repo,
   * Commit the code to git
   * Use the committed code (fresh clone) to build the ubuntu-cpc project
   * Inspect the images to see if /etc/network/interfaces.d exists

  [Regression Potential]

   * Low.  This create a directory via dh_installdirs if it doesn't exist
     already in the packaging.  Builds from sources that include the
     empty directory are not be impacted.  The owner and permissions on
     the directory are same.

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