I believe the problematic code could only be reached when reading buggy
versions (i.e., with duplicate ids) of the legacy FlightGear XML
non-master l10n files, which is why we haven't tripped on it so far.
Introduce a BASIC_CATEGORIES variable at the top of
python3-flightgear/flightgear/meta/i18n.py that lists all categories
handled by BasicL10NResourceManager. Since currently all of our
translation files can be handled this way (the XML master files all have
a flat structure), we only need to say BASIC_CATEGORIES = CATEGORIES.
With this change, adding a new basic category such as
'weather-scenarios' only requires one to add it to CATEGORIES.
Because cloning FGData from SourceForge using https does not work (this
has been the case for *years*) whereas normal updates of an existing
clone do work, and so does cloning the repository from its official
GitLab mirror using https, this commits implements a special case in
_gitDownload():
If the assembled clone URL is
<https://git.code.sf.net/p/flightgear/fgdata>, then ask the user if he
agrees to automatically clone FGData from GitLab and arrange the
repository setup to fetch subsequent updates from SourceForge. This
should be fine because <https://gitlab.com/flightgear/fgdata> is an
official mirror of FGData. The default answer is thus to do so. It is
automatically chosen when download_and_compile.sh is called with
--non-interactive (new option).
This implies that the initial use of download_and_compile.sh is again as
easy as subsequent ones.
This commits also adds the utility function _yes_no_quit_prompt() to
repeatedly ask a question ($1) until a valid answer has been provided.
The function automatically uses the default answer ($2) if
--non-interactive has been passed to download_and_compile.sh. See the
“discussion” at
<https://sourceforge.net/p/flightgear/mailman/message/37017469/>.
- Add class method availableTranslations() to AbstractFormatHandler in
i18n.py.
- Use it in fg-update-translation-files to allow autodetection of the
available translations when no LANGUAGE_CODE is passed to
fg-update-translation-files.
This should address James' wish at
<https://sourceforge.net/p/flightgear/mailman/message/37003967/>.
- The old URL for CMake's Git repository doesn't support https anymore;
update it to match the one given at <https://cmake.org/>.
- Build the 'release' branch rather than 'master':
download_and_compile.sh is not meant for CMake hackers!
