Reviewers: #frameworks, #build_system, dfaure

Reviewed By: dfaure

Subscribers: kde-frameworks-devel, kde-buildsystem

Tags: #frameworks, #build_system

Differential Revision: https://phabricator.kde.org/D28253

For locales like de_AT, the current code only looks in
share/locale/de_AT/ and share/locale/de-AT/ for translation catalogs,
but not in share/locale/de/ where they most likely are.
That's because bcp47Name() returns "de-AT" for de_AT (though in the
case of de_DE e.g. it does return "de").

This patch additionally tries to fall back to the general language by
taking the part of the locale name before the first '_'.

Differential Revision: https://phabricator.kde.org/D9793

Currently the test still passed even if one of the check_translations()
calls would fail.
The reason is that check_translations() is a function which has its own
scope, so if it sets "failed" the upper level doesn't see it.

Use the PARENT_SCOPE option when setting the variable to properly
propagate the value to the upper level.

Differential Revision: https://phabricator.kde.org/D6701

Because the old implementation (accidentally) worked when you put the
ecm_create_qm_loader call in a different CMakeLists.txt file to the
target the file was added to, some projects did this.

This won't work with build-time-generated files, though, like moc files.
So we (ab)use QTimer events to make the loading happen on the main
thread.

BUG: 346188
REVIEW: 126000

Multiple ecm_create_qm_loader() with different catalog names would
overwrite each other's generated files, causing the wrong catalog to be
loaded at runtime for some targets.

This puts the catalog name into the generated filename. Since the
catalog name is the only difference between the generated files, this is
sufficient to fix the runtime behaviour.

REVIEW: 125999