Re: spaces

[Andreas Kusalananda Kähäri]

On Wed, Jan 26, 2022 at 10:55:37AM +0100, Pascal wrote:
> hi,
> 
> I use yad to provide a graphical user interface to some command line
> programs.
> yad can require a lot of options so, for more visibility, I define these
> options in variables like this :
> 
> yad_general_options="
> --title=title
> --sticky
> --center
> --icon=icon
> "
> yad_progress_options="
> --progress
> --pulsate
> "
> yad_success_options="
> --image=success
> --button=Ok
> "
> 
> and I call yad like this :
> 
> yad $yad_general_options $yad_progress_options --text="the nice text"
> yad $yad_general_options $yad_success_options --text="the operation was a
> success"
> 
> everything works fine as long as no option incorporates a space.
> what if I want to put "my nice title" in the --title option ?
> I tried a lot of combinations based on \ and $ but nothing works :-(
> 
> regards, lacsaP.

yad_general_options=(
--title="Whatever ** ** ** goes here"
--sticky
--center
--icon=icon
)

yad_progress_options=(
--progress
--pulsate
)

yad "${yad_general_options[@]}" "${yad_progress_options[@]}" --text="the nice 
text"


In short, don't ever demote a list of separate strings into a single
string when you can store them as separate strings in an array.  Note
that the quoting of the array expansion is crucial.

Greg will likely have something about in his FAQ, and there is also
numerous examples of this on the Unix & Linux Stackexchange site, and in
the mailing list archive of this mailing list.

https://mywiki.wooledge.org/BashGuide/Arrays
https://unix.stackexchange.com/questions/459367/using-shell-variables-for-command-options



-- 
Andreas (Kusalananda) Kähäri
SciLifeLab, NBIS, ICM
Uppsala University, Sweden

.