(1) On recent meson versions, it fixes this error:
> extensions/goat-exercises/meson.build:108:0: ERROR: i18n.merge_file keyword argument 'output' was of type array[str] but should have been str
As docs explains, 'output' only accepts one item in i18n.merge_file().
This bug also happens on older meson (but there the reported error is a
lot less useful as it doesn't mention local meson build code).
(2) `setup.isl.xml` is a temporary intermediary file used to create the
Windows installer. It must not be installed.
(3) `gimp30-windows-installer.mo` itself is only used to create
`setup.isl.xml`. It must not be installed as well.
(4) gimp-tips.(its|loc) files (same for gimp-tags ones) should not be
installed. They are only temporary data.
(5) Fix environment variable: s/GETTEXT_DATA_DIRS/GETTEXTDATADIRS/
Fixes:
> /usr/bin/msgfmt: cannot locate ITS rules for ../../../data/tips/gimp-tips.xml.in
(6) Fix various bugs in the *.setup.isl files creation in autotools
build (typo, wrong files used, order of options in `xsltproc`
apparently meaningful, and so on. I guess the autotools build was
not as well tested as the meson one :P).
(7) Fixing the unit test verifying language lists consistency.
(8) `setup.isl.xml.in` must be added to the distribution.
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
Similarly to the previous commit, the tips and tags validation was never
happening as it was implemented as a custom top-level meson target. It
was not run during a normal build. Now it is.
Jehan