Re: libtextstyle vs Emacs

[Akim Demaille]

Hi Bruno,

> Le 1 août 2020 à 18:23, Bruno Haible <bruno@clisp.org> a écrit :
> 
> Hi Akim,
> 
>> In compilation-mode, Emacs reveals the escape for hyperlinks:
>> 
>> cd ~/src/faveod/rbs_parser/ && make BSN=~/src/gnu/bison/_build/g9d/src/bison
>> /Users/akim/src/gnu/bison/_build/g9d/src/bison -o src/Parser.cc 
>> src/Parser.ypp
>> src/Parser.ypp:270.7-13: avertissement: conflit de type pour l'action par 
>> défaut: <string> != <> 
>> []8;id=155289640005abcae1cc42ed00000000;https://www.gnu.org/software/bison/manual/html_node/Diagnostics.html#Wother\-Wother]8;;\]
>>  270 |     | tLIDENT
>>      |       ^~~~~~~
> 
> Please, can you provide a reproducible test case? Parser.ypp from
> 'git clone https://github.com/Shopify/rbs_parser.git' does not give a warning
> for me, when bison-3.7 is invoked on it.

Doh, sorry about that!  I did not mean to get you to look for this example.

This should do:

%token BAR BAR
%%
exp: BAR

-*- mode: compilation; default-directory: "/tmp/" -*-
Compilation started at Sun Aug  2 07:56:07

~/src/gnu/bison/_build/g9d/tests/bison /tmp/foo.y
/tmp/foo.y:1.12-14: avertissement: le symbole BAR est redéclaré 
[]8;id=155289640005abdead9e721600000000;https://www.gnu.org/software/bison/manual/html_node/Diagnostics.html#Wother\-Wother]8;;\]
    1 | %token BAR BAR
      |            ^~~
/tmp/foo.y:1.8-10: note: déclaration précédente
    1 | %token BAR BAR
      |        ^~~

Compilation finished at Sun Aug  2 07:56:07


>> Maybe hyperlinks should be disabled when $EMACS == "t"?  This is Emacs 26.3.
> 
> Please, can you also give the value of $TERM ? This is the common way to
> determine the capabilities of a terminal emulator, not $EMACS.

-*- mode: compilation; default-directory: "/tmp/" -*-
Compilation started at Sun Aug  2 07:56:39

echo $TERM
dumb

Compilation finished at Sun Aug  2 07:56:39


> You should know that
>  - There is some doc regarding Emacs [1],

I had not seen that seen, thanks.  In my case, this is M-x compile.

M-x shell gives me

bash-3.2$ echo $TERM
dumb
bash-3.2$ ~/src/gnu/bison/_build/g9d/tests/bison /tmp/foo.y
/tmp/foo.y:1.12-14: avertissement: le symbole BAR est redéclaré 
[]8;id=155289640005abdebe887c3100000000;https://www.gnu.org/software/bison/manual/html_node/Diagnostics.html#Wother\-Wother]8;;\]
    1 | %token BAR BAR
      |            ^~~
/tmp/foo.y:1.8-10: note: déclaration précédente
    1 | %token BAR BAR
      |        ^~~

with no styling at all, except the failed hyperlink.

And M-x term gives me perform result, styled (which doesn't show here):

bash-3.2$ echo $TERM
eterm-color
bash-3.2$ ~/src/gnu/bison/_build/g9d/tests/bison /tmp/foo.y
/tmp/foo.y:1.12-14: avertissement: le symbole BAR est redéclaré [-Wother]
    1 | %token BAR BAR
      |            ^~~
/tmp/foo.y:1.8-10: note: déclaration précédente
    1 | %token BAR BAR
      |        ^~~
bash-3.2$ 

Styled, but no links, which is consistant with:

>  - libtextstyle does not assume that hyperlinking is supported if $TERM
>    starts with "eterm" [2],




>  - The user can turn off hyperlink output by setting the environment variable
>    NO_TERM_HYPERLINKS [3].

Yup, I've seen that.  My point was really to help make it work out-of-the-box
in more cases.

Cheers!