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From: Michael Olbrich <mol@pengutronix.de>
Date: Sat, 20 Jun 2020 00:04:06 +0200
Subject: Re: [ptxdist] [APPLIED] ptxd_lib_template: add
 ptxd_template_read_options
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To: ptxdist@pengutronix.de
Cc: Bastian Krause <bst@pengutronix.de>

Thanks, applied as bf1a401a968193cf8fd8ebc4a6f8c899c2c3bae3.

Michael

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On Sat, 20 Jun 2020 00:04:06 +0200, Bastian Krause <bst@pengutronix.de> wrote:
> Read a variable from user input, limited to a set of options.
> 
> Example:
> 
>   $ ptxd_template_read_options "select your option" TYPE "option A" "option B" "option C"
>   ptxdist: select option by number:
>   ptxdist: [1] option A
>   ptxdist: [2] option B
>   ptxdist: [3] option C
>   ptxdist: select your option................: 2
>   $ echo $TYPE
>   option B
> 
> The user can select 1, 2 or 3. Other input is not accepted.
> 
> Signed-off-by: Bastian Krause <bst@pengutronix.de>
> Message-Id: <20200617143125.23999-2-bst@pengutronix.de>
> [mol: fix indention]
> Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de>
> 
> diff --git a/scripts/lib/ptxd_lib_template.sh b/scripts/lib/ptxd_lib_template.sh
> index 3d47cd85a4c4..9cace6c14a0b 100644
> --- a/scripts/lib/ptxd_lib_template.sh
> +++ b/scripts/lib/ptxd_lib_template.sh
> @@ -30,6 +30,32 @@ ptxd_template_read() {
>      export "${2}"
>  }
>  export -f ptxd_template_read
> +#
> +# Read a variable from user input, limited to an array of options
> +#
> +# $1 prompt prefix
> +# $2 variable name
> +# $3..$n options
> +#
> +ptxd_template_read_options() {
> +    local -a options=("${@:3}")
> +    local i=1
> +    echo "${PTXDIST_LOG_PROMPT}select option by number:"
> +    for option in "${options[@]}"; do
> +	echo "${PTXDIST_LOG_PROMPT}[${i}] ${option}"
> +	((i++))
> +    done
> +    while : ; do
> +	ptxd_template_read "${1}" chosen
> +	[ -n "${chosen}" ] && [ "${chosen}" -gt 0 ] &&
> +	[ "${chosen}" -le "${#options[@]}" ] &&
> +	break
> +
> +	echo "${PTXDIST_LOG_PROMPT}invalid option"
> +    done
> +    export "${2}=${options[$chosen-1]}"
> +}
> +export -f ptxd_template_read_options
>  
>  ptxd_template_read_name() {
>      ptxd_template_read "enter package name" package_name

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