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From: ludo@gnu.org (Ludovic Courtès)
To: Alex Kost <alezost@gmail.com>
Cc: 21536@debbugs.gnu.org
Subject: bug#21536: Texi, Unicode and Emacs interface
Date: Thu, 24 Sep 2015 00:02:16 +0200	[thread overview]
Message-ID: <87oagsg5g7.fsf@gnu.org> (raw)
In-Reply-To: <87twqlflxj.fsf@gmail.com> (Alex Kost's message of "Wed, 23 Sep 2015 13:51:36 +0300")

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Alex Kost <alezost@gmail.com> skribis:

> Evaluate there:
>
>   ((@@ (guix ui) texi->plain-text) "foo \u2015 bar.")
>
> So far so good.
>
> 2. Now connect to it, either with:
>
>    - netcat: "netcat localhost 37146"
>
>    - or Geiser: "M-x connect-to-guile"
>
> and evaluate the same expression.  This time you will get the error.

The encoding error comes from the fact that ‘texi->plain-text’ uses a
string port, and string ports internally use the current locale encoding
or ‘%default-port-encoding’.

Consequently, when running in the “C” locale, string ports cannot
represent non-ASCII code points (something widely regarded as a bug in
Guile, and at the very least an annoyance.)

To work around that, you can type this in *Guix Internal REPL*:

  (fluid-set! %default-port-encoding "UTF-8")

I fixed in commit 2cad18a8 of guix-artwork.git, but perhaps a similar
hack is apparently needed elsewhere.

Could you test this patch:


[-- Warning: decoded text below may be mangled, UTF-8 assumed --]
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diff --git a/guix/ui.scm b/guix/ui.scm
index 4a3630f..67dd062 100644
--- a/guix/ui.scm
+++ b/guix/ui.scm
@@ -803,7 +803,10 @@ converted to a space; sequences of more than one line break are preserved."
 
 (define (texi->plain-text str)
   "Return a plain-text representation of texinfo fragment STR."
-  (stexi->plain-text (texi-fragment->stexi str)))
+  ;; 'texi-fragment->stexi' uses a string port so make sure it's a
+  ;; Unicode-capable one (see <http://bugs.gnu.org/11197>.)
+  (with-fluids ((%default-port-encoding "UTF-8"))
+    (stexi->plain-text (texi-fragment->stexi str))))
 
 (define (package-description-string package)
   "Return a plain-text representation of PACKAGE description field."

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> BTW, since we now use texi for the package descriptions, does it mean
> that our intention is to get rid of using unicode symbols directly?

Not particularly.

Thanks,
Ludo’.

  reply	other threads:[~2015-09-23 22:03 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2015-09-23 10:51 bug#21536: Texi, Unicode and Emacs interface Alex Kost
2015-09-23 22:02 ` Ludovic Courtès [this message]
2015-09-24 12:02   ` Alex Kost
2015-09-24 20:16     ` Ludovic Courtès

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