Re: In go-ts-mode, tab-width 4 inserts two tabs instead of one

[BTuin]

Le 26/09/2023 à 14:31, Pankaj Jangid a écrit :
> "Augustin Chéneau (BTuin)" <btuin@mailo.com> writes:
>
> > That's because tab-width only controls the appearance of a
> > tabulation.
>
> I actually want this only. That is, I want to control the appearance of
> tabulation only.
>
> > In go-ts-mode, the indentation offset is set by the variable
> > go-ts-mode-indent-offset.  Since it is 8 by default and that you have
> > set tab-width to 4, it inserts two tabs to keep the offset of 8.
> >
> > So you simply need to set go-ts-mode-indent-offset to 4 or directly to
> > tab-width (with (setq go-ts-mode-indent-offset tab-width)).
>
> Setting both, tab-width and go-ts-mode-indent-offset, to 4 results in
> the desired behaviour. But I did not understand this.
>
> The doc string of go-ts-mode-indent-offset says, "Number of spaces for
> each indentation step". But when I set both to 4, it uses TAB (which I
> want), and not SPACEes.
>
> Is this variable explained in detail elsewhere?

So I don't know this very well, but from my understanding it replaces 
spaces with the equivalent tabs.

For instance, if you set tab-width to 4 and go-ts-mode-indent-offset to 
4, it will insert 4 spaces or equivalent, which are here equivalent to 1 
tab, so it will insert one tab instead.

If go-ts-mode-indent-offset is set to 6, it will insert 6 spaces or 
equivalent, which are here equivalent to one tab plus 2 spaces.

It you want to use spaces only instead, you might want to look at 
indent-tabs-mode.

There is also more information in the Emacs manual at "Indentation" 
(<https://www.gnu.org/software/emacs/manual/html_node/emacs/Indentation.html>) 
and in EmacsWiki (<https://www.emacswiki.org/emacs/IndentationBasics>).