if testcommand -v brew 2>&1` then read -p "是否要备份homebrew的软件列表(y/n,默认备份)？" saveFlag if test -z $saveFlag || test $saveFlag = "y" then brew list > $HOME/oldHomeBrewInstalledList.bak fi fi
if test
`
哦，谢谢建议。看来删除了大家安装过的软件了。。汗，我最近抽空改改。
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