下面我使用if语句和case语句来安排下面我的参数的顺序，以减轻我对rsync的重复输入。对于case以下if块，#!/bin/bash
rsync="rsync -vrtzhP --delete"
localmus=" /cygdrive/c/Users/user/Music/Zune/"
remotemus=" 10.252.252.254::Zune/"
localcal=" /cygdrive/c/Users/user/calibre/"
remotecal=" 10.252.252.254::calibre/"
dry=" -n"
if [ $1 == "zune" ] && [ $2 == "tohere" ]
then
toex=$rsync$remotemus$localmus
fi
if [ $1 == "zune" ] && [ $2 == "tothere" ]
then
toex=$rsync$localmus$remotemus
fi
if [ $1 == "calibre" ] && [ $2 == "tohere" ]
then
toex=$rsync$remotecal$localcal
fi
if [ $1 == "calibre" ] && [ $2 == "tothere" ]
then
toex=$rsync$localcal$remotecal
fi
if [[ $3 == "dry" ]]
then
toex=$toex$dry
fi
echo
echo $toex
echo
echo "Execute? y/n: "
read answer
case $answer in
y)
eval $toex
;;
n)
echo NO!
;;
esac
声明会更明智吗？如果是这样，怎么样？
$ python -m flask run
答案 0 :(得分：3)
您可以连接$ 1和$ 2来启用它。
case "$1 $2" in
"zune toHere")
toex=$rsync$localmus$remotemus
;;
"calibre toHere")
toex=$rsync$remotecal$localcal
;;
*)
echo "Unknown command $1 $2"
exit 2
;;
esac
答案 1 :(得分：1)
auto语句将在此处生成更具可读性和更紧凑的代码：
case答案 2 :(得分：0)
没有理由一起处理这两个，绝对没有理由使用eval：
remote=10.252.252.254::
local=/cygdrive/c/Users/user/
do_rsync () {
rsync -vrtzhP --delete "$1" "$2"
}
case $1 in
zune)
remote+=Zune/
local+=/Music/Zune
;;
calibre)
remote+=calibre/
local+=/calibre
;;
*) echo "Unknown transfer type: $1" >&2
return 1
;;
esac
case $2 in
tohere)
do_rsync "$remote" "$local" ;;
tothere)
do_rsync "$local" "$remote" ;;
*) echo "Unknown transfer direction: $2" >&2
return 1
esac