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Migrate from intltool to gettext

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intltool has long been dead upstream. Let's not poke the dead corpse,
please.

This commit is quite large, but that's mostly since trying to support a
hybrid of both gettext and intltool with both Meson and Autotools was
really hard, so I stopped trying.

Due to gettext relying on quite some things being at the exactly right
place in the autotools build (like `ABOUT-NLS` and `config.rpath`) we
really needed to cleanup the `autogen.sh` to only call `aclocal` and
`autoreconf`. No more strange magic; I tried to do it without changing
too much in the file, and things just broke. If people want to do
something more custom, they can just change the script directly. This
change also uncovered some problems in our `configure.ac`, like using
deprecated macros.

The following major changes happened:

* meson: Changed `custom_target()` to `i18n.merge_file()` for all
  supported file types
* Added `.its` and `.loc`  files for the GIMP-specific XML formats, so
  that gettext understands them
* For the `.isl` (Window installer stuff) file, there's no easy way to
  do this in gettext, so instead we start from an XML file (again with
  its own ITS rules etc), translate that with gettext, and then use
  `xsltproc` with a bit of magic to output the .isl file for each
  language
* the `po*/Makefile.in.in` files are migrated to `Makevars` files,
  which gettext natively understands.

Fixes: https://gitlab.gnome.org/GNOME/gimp/-/issues/8028
This commit is contained in:
Niels De Graef
2022-06-08 20:35:45 +02:00
committed by Jehan
parent a9f7feabd0
commit f663d26ab5
69 changed files with 1666 additions and 2771 deletions
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7
INSTALL.in
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@@ -32,11 +32,8 @@ header files installed.
1. You need to have installed a recent version of pkg-config (>= @GIMP_PKGCONFIG_VERSION@) available
from https://www.freedesktop.org/software/pkgconfig/.
2. You need intltool (at least @INTLTOOL_REQUIRED_VERSION@, but preferably a newer version).
Intltool can be downloaded from
https://ftp.gnome.org/pub/gnome/sources/intltool/
You also need gettext version @XGETTEXT_REQUIRED_VERSION@ or over. Earlier gettext had
issues with script-fu localization, ending up in incomplete GIMP localization.
2. You need gettext version 0.19.8 or newer. Older versions did not have support yet
for certain file formats.
3. You need to have GEGL version @GEGL_REQUIRED_VERSION@ or newer and babl version
@BABL_REQUIRED_VERSION@ or newer. You can get them from https://gegl.org/ or clone