Re: [bug-libunistring] Unicode 15.1.0

[Bruno Haible]

Hi Simon,

> I noticed Unicode 15.1.0 has been released:
> 
> http://blog.unicode.org/2023/09/announcing-unicode-standard-version-151.html

Thanks for the notice; I didn't know about it.

> I'm sure people will come along asking for libidn2 to support some of
> the new characters, so an update of libunistring would be great.

Does libidn2 use libunistring as a package, or does it import part of it
from gnulib directly? That is, do you wish to have a new libunistring release
soon?

> Is the
> process to update libunistring to a new Unicode release documented
> anywhere?  I suppose some things are not mechanic, but some of the steps
> are.

It's documented in the sense that we have ChangeLog entries from the
previous upgrades. Typically the tasks are like this:
  1. Understand what were the main changes in that Unicode version.
  2. Download the data files.
  3. Run gnulib/lib/gen-uni-tables.c against the new data files,
     fixing aborts on the go.
  4. With these modified gnulib files, build libunistring and run its
     test suite.
  5. Update files that implement UAX annexes (e.g. line breaking).
  6. Update version number metainfo.

I'll probably get to it in the next few days; at a first glance, the
changes don't appear to be large.

Bruno