我写了一个脚本xyzzy来做到这一点：
#!/bin/bash
i="$1"
i=$((${i//[^0-9]/}))
i="$(($i-1+0))"
b="$2"
b=$((${b//[^0-9]/}))
b="$(($b-1+0))"
if [ -z "$XYZZY_INDEX" ]; then
XYZZY_INDEX="$((-1))"
fi
if [ ! -f "/tmp/xyzzy.list" ]; then
touch /tmp/xyzzy.list
chmod a+rw /tmp/xyzzy.list
fi
readarray -t MYLIST < /tmp/xyzzy.list
showHelp(){
read -r -d '' MYHELP <<'EOB'
xyzzy 1.0
A command for manipulating escape routes from grues. Otherwise known as a useful system admin
tool for storing current directories and cycling through them rapidly. You'll wonder why this
wasn't created many moons ago.
Usage: xyzzy [options]
help/-h/--help Show the help.
this/-t/--this Store the current directory in /tmp/xyzzy.list
begone/-b/--begone Clear the /tmp/xyzzy.list file. However, succeed with a number and
it clears just that item from the stored list.
show/-s/--show Show the list of stored directories from /tmp/xyzzy.list
. # Use a number to 'cd' to that directory item in the stored list. This syntax is odd:
. xyzzy 2
...would change to the second directory in the list
. [no options] Use the command alone and it cd cycles through the next item in the stored
list, repeating to the top when it gets to the bottom. The dot and space before xyzzy
is required in order for the command to run in the current shell and not a subshell:
. xyzzy
Note that you can avoid the odd dot syntax by adding this to your ~/.bashrc file:
alias xyzzy=". xyzzy"
and then you can do "xyzzy" to cycle through directories, or "xyzzy {number}" to go to a
specific one.
May you never encounter another grue.
Copyright (c) 2016, Mike McKee <https://github.com/volomike>
EOB
echo -e "$MYHELP\n"
}
storeThis(){
echo -e "With a stroke of your wand, you magically created the new escape route: $PWD"
echo "$PWD" >> /tmp/xyzzy.list
chmod a+rw /tmp/xyzzy.list
}
begoneList(){
if [[ "$b" == "-1" ]]; then
echo "POOF! Your escape routes are gone. We bless your soul from the ever-present grues!"
>/tmp/xyzzy.list
chmod a+rw /tmp/xyzzy.list
else
echo -n "Waving your wand in the dark, you successfully manage to remove one of your escape routes: "
echo "${MYLIST[${b}]}"
>/tmp/xyzzy.list
chmod a+rw /tmp/xyzzy.list
for x in "${MYLIST[@]}"; do
if [[ ! "$x" == "${MYLIST[${b}]}" ]]; then
echo "$x" >> /tmp/xyzzy.list
fi
done
fi
}
showList(){
echo -e "These are your escape routes:\n"
cat /tmp/xyzzy.list
}
cycleNext(){
MAXLINES=${#MYLIST[@]}
XYZZY_INDEX=$((XYZZY_INDEX+1))
if [[ $XYZZY_INDEX > $(($MAXLINES - 1)) ]]; then
XYZZY_INDEX=0
fi
MYLINE="${MYLIST[${XYZZY_INDEX}]}"
cd "$MYLINE";
}
switchDir(){
MYLINE="${MYLIST[${i}]}"
cd "$MYLINE";
}
if [[ "$@" == "" ]];
then
cycleNext
fi;
while [[ "$@" > 0 ]]; do case $1 in
help) showHelp;;
--help) showHelp;;
-h) showHelp;;
show) showList;;
-s) showList;;
--show) showList;;
list) showList;;
this) storeThis;;
--this) storeThis;;
-t) storeThis;;
begone) begoneList;;
--begone) begoneList;;
*) switchDir;;
esac; shift
done
export XYZZY_INDEX
我使用它的方式是先复制到/usr/bin文件夹，然后chmod a+x在其上。然后，我编辑我的root和用户帐户~/.bashrc文件以在底部包括以下几行：
alias xyzzy='. xyzzy'
alias xy='. xyzzy'
“ xy”是命令的缩写形式，可加快键入速度。
然后，我可以使用以下命令将当前目录存储在列表中：
xyzzy this
...并根据需要重复。当我用所需的目录填充此列表后，它们将保留在该目录中，直到我重新启动计算机为止，因为那是再次清除/ tmp的时候。然后我可以输入...
xyzzy show
...列出当前保存的目录。为了切换到目录，我有两种选择。一种选择是按索引指定路径（它是从1开始的索引），如下所示：
xyzzy 2
...将切换到列表中第二个目录。或者，我可以不使用索引号，而是这样做：
xyzzy
...让它根据需要遍历每个目录。要执行更多命令，请键入：
xyzzy help
当然，我添加的愚蠢的echo语句使工作更加有趣。
请注意，xyzzy是对Collosal Cave文字冒险的引用，在其中键入xyzzy可以让您在游戏中的两个房间之间切换，以避免产生毛刺。
$CDPATH也许？