[Bug 1453330] Re: rewrite pull-[lp|debian]-source

[Dan Streetman]

** Summary changed:

- pull-{lp,debian}-source not getting source for binary because DDE is dead
+ rewrite pull-[lp|debian]-source

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Title:
  rewrite pull-[lp|debian|uca]-source

Status in ubuntu-dev-tools package in Ubuntu:
  Triaged
Status in ubuntu-dev-tools package in Debian:
  New

Bug description:
  I've essentially re-written the pull-[lp|debian|uca]-source scripts,
  consolidating them all to use a common codebase and extending the
  functionality to allow pulling not only source but also debs, udebs,
  and ddebs.

  The updates also allow specifying binary package names, which the
  original pull-*-source didn't work with.

  The pull-lp-[debs|udebs|ddebs] also allows downloading otherwise
  "gone" debs from Launchpad - for older packages where LP no longer
  lists the binaries as existing anymore.  They are actually still
  there, but getting their specific URL is tricky, and not possible from
  the normal LP web interface.  The new pull-lp-* scripts can handle it
  and will allow downloading any deb/udeb/ddeb for any older package.

  This also fixes bug 1700846, where pull-debian-source fails for older
  packages where the public key that the DSC was signed with no longer
  is in the keyring.

  
  Original description:

  Errors like the following are happening because Debian's DDE [1] is
  dead [2]:

  logan at logan-VMware:~$ pull-debian-source d-rats
  pull-debian-source: Error: Unable to retrieve package information from DDE: http://dde.debian.net/dde/q/udd/dist/d:debian/r:sid/p:d-rats/?t=json (<urlopen error [Errno -2] Name or service not known>)
  pull-debian-source: Error: Unable to find d-rats in Debian suite "sid".

  Maybe someone would be willing to host/maintain a new instance of DDE?
  Or is there another way to programmatically grab the Debian/Ubuntu
  source package name from the binary package name?

  [1] https://wiki.debian.org/DDE
  [2] https://lists.debian.org/debian-devel/2014/09/msg00603.html

  Related bugs:
   * bug 1508948:  pull-debian-source fails use of rmadison on wily

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