如何从m上的$path中删除某个路径

Question

我需要在macosxlion上去掉/Library/Frameworks/Python.framework/Versions/2.7/bin变量中的$PATH。我打开了几个文件，这些文件向路径中添加了一些内容，但找不到添加python路径的位置。以下是几个文件和路径变量的输出：

echo $PATH返回

/opt/local/bin:/opt/local/sbin:/Library/Frameworks/Python.framework/Versions/2.7/bin:/opt/local/bin:/opt/local/sbin:/Users/friedrich/.rvm/gems/ruby-1.9.3-p362/bin:/Users/friedrich/.rvm/gems/ruby-1.9.3-p362@global/bin:/Users/friedrich/.rvm/rubies/ruby-1.9.3-p362/bin:/Users/friedrich/.rvm/bin:/Users/friedrich/.rbenv/shims:/Users/friedrich/.rbenv/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/usr/local/git/bin

文件/etc/paths/

/usr/local/bin
/usr/bin
/bin
/usr/sbin
/sbin

文件~/.profile

export PATH=$PATH:/usr/local/git/bin:/usr/local/Cellar/todo-txt/2.9/bin

文件~/.bash_profile

export PATH="$HOME/.rbenv/bin:$PATH"
eval "$(rbenv init -)"

[[ -s "$HOME/.rvm/scripts/rvm" ]] && source "$HOME/.rvm/scripts/rvm" # Load RVM into a shell session *as a function*

# todo.txt script path
source /usr/local/Cellar/todo-txt/2.9/etc/bash_completion.d/todo_completion complete -F _todo t

# MacPorts Installer addition on 2013-03-01_at_21:26:56: adding an appropriate PATH variable for use with MacPorts.
export PATH=/opt/local/bin:/opt/local/sbin:$PATH
# Finished adapting your PATH environment variable for use with MacPorts.

最后一个向路径添加内容的文件似乎是.bash_profile正在添加export PATH=/opt/local/bin:/opt/local/sbin:$PATH，因此我需要该文件在此之前一步添加内容。

Answer 1

可以使用参数展开修剪路径的固定部分。将此添加到.bash_profile的结尾（或至少延迟到添加有问题的路径后处理）：

PATH=${PATH/\/Library\/Frameworks\/Python.framework\/Versions\/2.7\/bin:}

（所有的反斜杠都很不幸，但你至少只需要打一次。）