在进入目录执行bash函数 [英] Execute a bash function upon entering a directory

问题描述

我想，当我进入一个新的目录来执行特定bash函数。 Somethink这样的：

I'd like to execute a particular bash function when I enter a new directory. Somethink like:

alias cd="cd $@ && myfunction"

$ @ 这里是行不通的，并增加一个反斜杠于事无补。我也有点担心带CD搞乱，这将是很好，如果这个工作了，改变了目录，如 PUSHD 其他命令和 POPD 。

$@ doesn't work there, and adding a backslash doesn't help. I'm also a little worried about messing with cd, and it would be nice if this worked for other commands which changed directory, like pushd and popd.

任何更好的别名/命令？

Any better aliases/commands?

推荐答案

最简单的解决方案，我能想出是这样

The easiest solution I can come up with is this

myfunction() {
  if [ "$PWD" != "$MYOLDPWD" ]; then
    MYOLDPWD="$PWD";
    # strut yer stuff here..
  fi
}

export PROMPT_COMMAND=myfunction

这应该做到这一点。它会与所有命令的工作，并显示之前提示就会触发。

That ought to do it. It'll work with all commands, and will get triggered before the prompt is displayed.

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