[Bug 1762889] Re: dh_translations doesn't strip .desktop files when more than 1 pot target with meson

[Jeremy Bicha]

Gunnar, this fix assumes that the translation templates will match each
other and will match the meson project id.

polari 3.30.1's project id is 'polari'. Its 2 pot targets are polari-pot
and help-org.gnome.Polari-pot.

The project id needs to be 'polari' since that determines the tarball
name when ninja dist is run (polari-3.30.1.tar.xz).

So the easy workaround for polari is to simply use polari-pot and help-
polari-pot

Since this is the only case I've found like this so far, I'm going to go
ahead and propose this to the Polari developers. I just wanted to
mention this case to you.

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Title:
  dh_translations doesn't strip .desktop files when more than 1 pot
  target with meson

Status in pkgbinarymangler package in Ubuntu:
  Fix Released
Status in pkgbinarymangler source package in Bionic:
  Triaged

Bug description:
  [Impact]

  With version 136 of the dh-translations package, support for the Meson
  build system was added. While that change is sufficient for making
  dh_translations run successfully for some Meson packages, it's not
  sufficient for packages with multiple gettext domains, e.g.
  help-[project] domains. As regards POT building, it has so far been
  handled for several packages via overrides in debian/rules, but in
  most cases the .desktop files in such packages are shipped with
  upstream translations and without "X-Ubuntu-Gettext-Domain", so
  additional LP translations are not made available to the users.

  The proposed upload includes fixes from dh-translations 139 which
  deals with it for the remaining Meson packages. This will improve it
  for a number of packages to the extent they are SRUed to bionic.

  [Test Case]

  Let gnome-mines 1:3.28.0-1 be our use case. The file

  /usr/share/applications/gnome-mines.desktop

  includes upstream translations and no X-Ubuntu-Gettext-Domain.

  Then:

  * Install dh-translations 138.1 from bionic-proposed
  * Build gnome-mines locally

  and find that the .desktop file was stripped from upstream
  translations and includes the line:

  X-Ubuntu-Gettext-Domain=gnome-mines

  [Regression Potential]

  The backported changes address some build issues, and I find it hard
  to see how they could cause new ones. In order to minimize the risk,
  one of the changes in version 139, which is not considered 'safe
  safe', is not included in this proposal.

  Also, this package is not for users, so possible issues will at first
  hand hit developers who can act on them in connection with uploads.

  [Original description]

  The gnome.help() meson function creates a help-$project-pot target.
  This confuses dh_translations which complains:

  dh_translations: more than one meson translation domain found (help-
  gnome-calculator,gnome-calculator), don't know which one to use

  I think the only consequence of this is that the .desktop doesn't have
  its translations stripped and replaced with X-Ubuntu-Gettext-Domain=

  This means that Ubuntu translators are unable to update those
  translations.

  Affected Apps
  =============
  Therefore, this issue affects GNOME apps in main that use meson and also include help files.

  gnome-control-center is also affected because it happens to have an
  extra gettext domain (but does not ship help).

  libgweather gets the warning because it has a second gettext domain
  but it doesn't ship any .desktop files so I think the warning is
  harmless.

  Suggestion
  ==========
  Maybe dh_translations could just exclude targets that start with "help-". That would fix most of these cases.

  Other Info
  ==========
  This bug is split off LP: #1751820

  pkgbinarymanagler 136 in bionic

  References
  ==========
  http://mesonbuild.com/Gnome-module.html#gnomeyelp
  http://mesonbuild.com/Localisation.html

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