macos - zsh缩短电流路径的长度

Question

每当我深入目录时，zsh都会在提示中显示完整路径。

而不是显示
x@y:~/i/am/a/really/really/really/really/long/path/somewhere
我想有
x@y:~/path/somewhere
我怎样才能做到这一点？

我在OSX Yosemite 10.10.4上的iTerm中使用zsh。

编辑:

这是我的bashrc文件:

  1 # System-wide .bashrc file for interactive bash(1) shells.
  2 if [ -z "$PS1" ]; then
  3    return
  4 fi
  5
  6 PS1='\h:\W \u\$ '
  7 # Make bash check its window size after a process completes
  8 shopt -s checkwinsize
  9 # Tell the terminal about the working directory at each prompt.
  10 if [ "$TERM_PROGRAM" == "Apple_Terminal" ] && [ -z "$INSIDE_EMACS" ]; then
  11     update_terminal_cwd() {
  12         # Identify the directory using a "file:" scheme URL,
  13         # including the host name to disambiguate local vs.
  14         # remote connections. Percent-escape spaces.
  15         local SEARCH=' '
  16         local REPLACE='%20'
  17         local PWD_URL="file://$HOSTNAME${PWD//$SEARCH/$REPLACE}"
  18         printf '\e]7;%s\a' "$PWD_URL"
  19     }
  20     PROMPT_COMMAND="update_terminal_cwd; $PROMPT_COMMAND"
  21 fi

Answer 1

要指定路径中显示的许多尾随组件，请在提示符下将整数插入相应的转义序列。在您的情况下，%2~将解决问题。 zshmisc(1)的节选:

%d 
%/     Current working directory.  If an integer follows the `%', 
       it specifies a number of trailing components of the current 
       working directory to show; zero means the whole path.  A 
       negative integer specifies leading  components, i.e. %-1d 
       specifies the first component.

%~     As  %d  and  %/, but if the current working directory starts
       with $HOME, that part is replaced by a `~'. Furthermore, if 
       it has a named directory as its prefix, that part is replaced 
       by a `~' followed by the name of the directory, but only if 
       the result is shorter than the full path; see Dynamic and 
       Static named directories in zshexpn(1).