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bug#35671: 'glibc-utf8-locales' should include C.UTF-8 locale

From: Meiyo Peng
Subject: bug#35671: 'glibc-utf8-locales' should include C.UTF-8 locale
Date: Wed, 15 May 2019 09:35:05 +0800

Hi Ludovic,

Ludovic Courtès writes:

> Meiyo Peng <address@hidden> skribis:
>> I was surprised last week (maybe the week before that) when I found out
>> that glibc-utf8-locales only provides locales for de_DE, el_GR, en_US,
>> fr_FR, tr_TR.  And in our manual, we tell people to install
>> glibc-utf8-locales after installing Guix on a foreign distro in order to
>> solve locale problems.  The name "glibc-utf8-locales" indicates it
>> provides ALL UTF-8 locales while in fact it does not.  This caused me a
>> trouble because I have to set the locale of Emacs to zh_CN.UTF-8 in
>> order to enable the ibus input method in Emacs.  (This is a known
>> problem of Emacs.  Locale has to be set to one of CJK locale in order to
>> enable external input methods.)  Since the zh_CN.UTF-8 locale is not in
>> $GUIX_LOCPATH, ibus does not work in Emacs.  I ended up installing the
>> "glibc-locales" package and solved the problem.
> To be fair, the manual has always recommended ‘glibc-locales’, not
> ‘glibc-utf8-locales’, and the latter is explicitly described as “limited
> to a few UTF-8 locales”:
>   https://www.gnu.org/software/guix/manual/en/html_node/Application-Setup.html

You are right.  My mistake.  But when I saw the text:

  Note that the glibc-locales package contains data for all the locales
  supported by the GNU libc and weighs in at around 110 MiB.
  Alternatively, the glibc-utf8-locales is smaller but limited to a
  few UTF-8 locales.

I thought the glibc-utf8-locales should satisfy my requirements since
all my locales are in UTF-8, and it's preferred if disk space is
limited.  The name of glibc-utf8-locales is misleading.  In fact, the
"few" UTF-8 locales it provides are too few.  We'd better modify the
text a little bit if we are going to reach a broader user base.

> The hint in (guix ui) is less clear, though.
>> I think it would be better to simply tell people to install the
>> "glibc-locales" package.  There may be a case where different
>> applications are set to different locales.  For example, my system is
>> set to the en_US.UTF-8 locale but my Emacs is set to the zh_CN.UTF-8
>> locale.  So $LC_* only refers to en_US.UTF-8 if guix tries to detect the
>> locale.  If ‘guix package --install-locales’ only install what $LANG or
>> $LC_* refers to, zh_CN.UTF-8 won't be installed for me.
> That command could take a parameter, of course.

That makes sense.

Meiyo Peng

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