![关于bash中选择菜单的问题](https://linux22.com/image/1154577/%E5%85%B3%E4%BA%8Ebash%E4%B8%AD%E9%80%89%E6%8B%A9%E8%8F%9C%E5%8D%95%E7%9A%84%E9%97%AE%E9%A2%98.png)
在您告诉我“已经有大量关于此的指南”之前,请知道我实际上已经制作了一个选择菜单并且它正在运行。
然而有一件事让我抓狂。我目前编码此菜单的方式是这样的:
1) 用户选择一个选项 2) 菜单重新加载 3) 选项旁边有一个星号以表明已被选中。
问题:
每次选择后菜单都会重新加载,用户必须一次选择一个选项。你可以想象这很慢,而且会使终端窗口变得混乱。
我想要的是:
用户应该能够输入 1-4 或 1,4,7 来选择多个选项。
我不想要的是:
Whiptail 或 Dialog。我实际上也做了一个,而且完美无缺。但是,如果可以的话,我宁愿不使用它,或者将其用作后备。我认为不使用它会更方便用户(更不用说更容易看)。
代码:
# #
### CSGO Plugin selection ###
# #
options=(
"SurfTimer - 2.02 - Core of this server."
"AutoFileLoader - Caches all material, model, and sound files for players to download."
"Chat-Procesor - Chat Processing Plugin"
"Dynamic - PreReq for many plugins to work properly."
"FixAngles - Fixes 'wrong angle on material' error that gets spammed in console when using store items"
"Mapchooser_Extended - Map Vote System. See maplist.cfg/mapcycle.cfg.")
....
menu() {
echo "Avaliable options:"
for i in ${!options[@]}; do
printf "%3d%s) %s\n" $((i+1)) "${choices[i]:- }" "${options[i]}"
done
[[ "$msg" ]] && echo "$msg"; :
}
prompt="Check an option (again to uncheck, ENTER when done): "
while menu && read -rp "$prompt" num && [[ "$num" ]]; do
[[ "$num" != *[![:digit:]]* ]] &&
(( num > 0 && num <= ${#options[@]} )) ||
{ msg="Invalid option: $num"; continue; }
((num--)); msg="${options[num]} was ${choices[num]:+un}checked"
[[ "${choices[num]}" ]] && choices[num]="" || choices[num]="+"
done
printf "You selected"; msg=" nothing"
for i in ${!options[@]}; do
[[ "${choices[i]}" ]] && { printf " %s" "${options[i]}"; msg=""; }
done
答案1
我会按照如下方式进行:
menu() {
clear
echo "Available options:"
for i in ${!options[@]}; do
printf "%3d%s) %s\n" $((i+1)) "${choices[i]:- }" "${options[i]}"
done
}
prompt="Check an option (again to uncheck, ENTER when done): "
while menu && read -rp "$prompt" num && [[ "$num" ]]; do
[[ "$num" =~ "-" ]] && num=$(seq $(sed -E 's/(\d*)-(\d*)/\1 \2/' <<<"$num"))
for i in $num; do
((i--))
[[ "${choices[i]}" ]] && choices[i]="" || choices[i]="*"
done
done
这将测试是否$num
包含连字符,并在必要时构建范围,然后简单地循环遍历的内容,$num
以便用户可以一次给出多个选项,例如1 2 4
或1-4
(但不能是它们的组合!)。clear
每次在打印菜单之前,它还会显示终端。