在这种特殊情况下，我想在Bash中添加一个确认
Are you sure? [Y/n]
对于Mercurial的hg push ssh://用户名@www.example.com//somepath/morepath，这实际上是一个别名。是否有一个可以添加到别名的标准命令来实现它?
原因是hgpush和hgout听起来很相似，有时当我想要hgoutrepo时，我可能会意外地键入hgpushrepo(两者都是别名)。
更新:如果可以像内置命令一样使用另一个命令，比如:confirm && hg push ssh://…那太好了……只是一个命令，可以询问“是”或“否”，如果是则继续其余的操作。
当前回答
Try,
#!/bin/bash
pause ()
{
REPLY=Y
while [ "$REPLY" == "Y" ] || [ "$REPLY" != "y" ]
do
echo -e "\t\tPress 'y' to continue\t\t\tPress 'n' to quit"
read -n1 -s
case "$REPLY" in
"n") exit ;;
"N") echo "case sensitive!!" ;;
"y") clear ;;
"Y") echo "case sensitive!!" ;;
* ) echo "$REPLY is Invalid Option" ;;
esac
done
}
pause
echo "Hi"
其他回答
好吧，这是我的确认版本，修改自James的版本:
function confirm() {
local response msg="${1:-Are you sure} (y/[n])? "; shift
read -r $* -p "$msg" response || echo
case "$response" in
[yY][eE][sS]|[yY]) return 0 ;;
*) return 1 ;;
esac
}
这些变化是:
使用local防止变量名发生冲突 阅读使用$2 $3…为了控制它的动作，可以使用-n和-t 如果读取退出不成功，回显换行美容 我的Git在Windows上只有bash-3.1，没有true或false，所以使用return代替。当然，这也兼容bash-4.4 (Git for Windows的当前版本)。 使用ipython风格的"(y/[n])"明确表示"n"是默认值。
这个版本允许你有不止一种情况y或y n或n
Optionally: Repeat the question until an approve question is provided Optionally: Ignore any other answer Optionally: Exit the terminal if you want confirm() { echo -n "Continue? y or n? " read REPLY case $REPLY in [Yy]) echo 'yup y' ;; # you can change what you do here for instance [Nn]) break ;; # exit case statement gracefully # Here are a few optional options to choose between # Any other answer: # 1. Repeat the question *) confirm ;; # 2. ignore # *) ;; # 3. Exit terminal # *) exit ;; esac # REPLY='' }
还要注意:在这个函数的最后一行清除REPLY变量。否则，如果你回显$REPLY，你会看到它仍然设置，直到你打开或关闭你的终端或再次设置它。
read -r -p "Are you sure? [Y/n]" response
response=${response,,} # tolower
if [[ $response =~ ^(yes|y| ) ]] || [[ -z $response ]]; then
your-action-here
fi
在/etc/bashrc文件中添加以下内容。 这个脚本添加了一个常驻的“函数”，而不是名为“confirm”的别名。
function confirm( )
{
#alert the user what they are about to do.
echo "About to $@....";
#confirm with the user
read -r -p "Are you sure? [Y/n]" response
case "$response" in
[yY][eE][sS]|[yY])
#if yes, then execute the passed parameters
"$@"
;;
*)
#Otherwise exit...
echo "ciao..."
exit
;;
esac
}
Try,
#!/bin/bash
pause ()
{
REPLY=Y
while [ "$REPLY" == "Y" ] || [ "$REPLY" != "y" ]
do
echo -e "\t\tPress 'y' to continue\t\t\tPress 'n' to quit"
read -n1 -s
case "$REPLY" in
"n") exit ;;
"N") echo "case sensitive!!" ;;
"y") clear ;;
"Y") echo "case sensitive!!" ;;
* ) echo "$REPLY is Invalid Option" ;;
esac
done
}
pause
echo "Hi"
