Re: [ptxdist] [PATCH v3 1/6] ptxd_lib_template: add ptxd_template_read_options

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Wed, Jun 17, 2020 at 04:31:20PM +0200, Bastian Krause 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 $TYPE
>   option B
> 
> The user can select 1, 2 or 3. Other input is not accepted.
> 
> Signed-off-by: Bastian Krause <bst@pengutronix.de>
> ---
> Introduced in v3. Used to ask user about HSM type in a later commit.
> ---
>  scripts/lib/ptxd_lib_template.sh | 26 ++++++++++++++++++++++++++
>  1 file changed, 26 insertions(+)
> 
> diff --git a/scripts/lib/ptxd_lib_template.sh b/scripts/lib/ptxd_lib_template.sh
> index f39e6e033..6b405763b 100644
> --- a/scripts/lib/ptxd_lib_template.sh
> +++ b/scripts/lib/ptxd_lib_template.sh
> @@ -30,6 +30,32 @@ ptxd_template_read() {
>      export "${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]}"

Wrong indention. I'll fix it when I apply this.

Michael

> +}
> +export -f ptxd_template_read_options
>  
>  ptxd_template_read_name() {
>      ptxd_template_read "enter package name" package_name
> -- 
> 2.27.0
> 
> 
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