linux 在bash代码中正确引用导出的变量

eqoofvh9  于 2022-11-28  发布在  Linux
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我创建了这个"书签"程序：https://github.com/PyTis/PyTis/blob/development/src/bootstrap-box/home-jlee/bashrc/bookmarks.rc
我擅长很多语言，bash不是其中之一。我不擅长bash，类型，类型等等。
我使用linux的屏幕程序ALLOT，通常在屏幕上至少打开10个窗口。我还使用了一个非常花哨的提示符：

这显示了我当前的"项目"，它只是一个保存的路径。键入"bms"是书签的缩写，它"列出书签"：

现在，当我跳到一个服务器上时，我做的第一件事通常是输入"bm"直接跳到我上次工作的项目的目录。如果我必须将目录切换到我经常工作的项目的另一个路径，即"toolbox"下面的project 2，在输入"bms"以查看与路径相关的数字后，我只需输入"bm 2"并按回车键。
所有这些都是作为我的. bashrc的一部分编写的，但是被分离到一个"bookmarks. rc"文件中，这个文件只是来源于我的. bashrc文件。
我真正想做的是将书签存储路径"~/. bookmarks. set "设置为一个变量：

  • 一月一日 *

然而，..当我尝试这样做时，我无法在文件的其余部分正确引用它。我不知道我做了什么才能做到这一点。目前，路径是硬编码的。
所以，...我希望把他的酷"程序"送给别人，作为回报，他们能帮助"修复"这个文件吗，这样它的其余部分就利用了变量***$BOOKMARKS***，它设置在第14行here，...或者你可以简单地看看下面的代码：

# ~/.bashrc: executed by bash(1) written by Josh Lee.
# Bookmark shortcuts ##
############################################################################
##  XXX-TODO (next version)
##
############################################################################
## This now keeps up to 20 lines in the file.
## Without giving a number, bm just loads the top line. setbm shifts all
## lines down one, and adds a new top line, bm again would load the top line, 
## but bm 1 or bm 2 would go back one or 2 lines down and read those instead
## (basically allowing you to keep history).  You can manage how many lines it
## keeps track of by editing the "total_bms=20" variable below

export BOOKMARKS='~/.bookmarks.set' # Where are the bookmarks stored
let total_bms=20 # How many bookmarks to track

############################################################################
# This version explained:  This is for bookmarking a single bookmark direcotry.
# Many times when working on a server, the user must change directories many
# times, however, your purpose for being on said server, is to work on a
# specific bookmark.  Perhaps you'll end up in /etc/apache2/sites-available/
# for editing the sites http conf, and then in /var/bind9/xyz, then perhaps in
# /var/lib/mysql.  Eventually however, you will always be circling back to your
# primary bookmark.  To save the time of typing out the path with "cd" (change
# direcory you now have the follwoing commands available:
# Author: Josh Lee
# Copyright: PyTis.com
# Created: June 1st, 2016
# Modified: August 19, 2022
# License: GPL
# Version: 2
#
# *** The only 2 commands you will want to memorize are: "setBm" and "bm" ***
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# 
# setBm/setBookmark, setbm/setbookmark; 
#
# setBm is simply an alias of setBookmark, these are case insensative;
# These commands are for settting the current bookmark.  Look at is as
# bookmarking your bookmark.  You can call it one of 2 ways, by passing the
# current path in with '.' as the input argument, or by passing a specific path
# in, regardless of your current path (expressed with `pwd`).  The path will be
# stored in your home directory in a file named .bookmark.set 
# i.e.: ~/.bookmark.set
#
#   examples:
#     > setBm
#     > setBm .
#     > setBm /some/path/to/a/bookmark
#
# Actual Use Example:
# [ CURRENT PROJECT: ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:19:33 PM Thu Jul 28)
# (~/bitbucket/src_igb has 41 files, 46Kb) --> setBm
# PROJECT WAS:
# PROJECT IS NOW: '/home/jlee38/bitbucket/src_igb'
# 
# Actual Use Example:
# [ CURRENT PROJECT:/home/jlee38/bitbucket/src_igb ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:17:16 PM Thu Jul 28)
# (~/bitbucket/src_igb has 41 files, 46Kb) --> setBm
# NO CHANGE, PROJECT ALREADY SET TO: /home/jlee38/bitbucket/src_igb
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# showBm/showBookmark, showbm/showbookmark; 
#
# showBm is simply an alias of showBookmark, these are case insensative;
# This command reads the current bookmark path from your user's environmental
# varialbe $PROJECT and prints it to screen; WITHOUT reading it from the user's
# ~/.bookmark.set file.
#
# Actual Use Example:
# [ CURRENT PROJECT:/home/jlee38/bitbucket/src_igb ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:19:52 PM Thu Jul 28)
# (~/bitbucket/src_igb has 41 files, 46Kb) --> showBm
# /home/jlee38/bitbucket/src_igb
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# listBms/listBookmarks, listbms/listbookmarks, bms
# showBms/showBookmarks, showbms/showbookmarks; these are case insensative 
#
# This command will print out all bookmarks stored in te ~/.bookmark.set file.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# loadBm/loadBookmark, loadbm/loadbookmark these are case insensative
# You can enter a number, to choose a stored bookmark
#
# This command will first read the path stored in your ~/.bookmark.set file,
# load it into the environmental variable $PROJECT, then reset the bookmark in
# your current prompt, by calling _setPrompt.
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
# getBm/getBookmark, getbm/getbookmark:
#
# getBm is simply an alias of getBookmark, these are case insensative;
# This command will first read the path stored in your ~/.bookmark.set file,
# load it into the environmental variable $PROJECT, then reset the bookmark in
# your current prompt, then print it to screen.
# Same as calling loadBm, _setPrompt, then this prints the bookmark to the
# screen.
#
# Actual Use Example:
# [ CURRENT PROJECT:/home/jlee38/bitbucket/src_igb ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:29:19 PM Thu Jul 28)
# (~/bitbucket/src_igb has 41 files, 46Kb) --> getBm
# PROJECT IS:
# /home/jlee38/bitbucket/src_igb
#
# # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # # #
#
# bm
#
# This command is used to jump (change directories) to the current bookmark.
# 
# Actual Use Example:
# [ CURRENT PROJECT:/home/jlee38/bitbucket/src_igb ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:37:39 PM Thu Jul 28)
# (~ has 35 files, 5.8Mb) --> bm
#
# [ CURRENT PROJECT:/home/jlee38/bitbucket/src_igb ]
# ( jlee38@IP:208.127.81.217 )-[UNAME: CYGWIN_NT-10.0-19044 ]-(13:37:44 PM Thu Jul 28)
# (~/bitbucket/src_igb has 41 files, 46Kb) -->
#
############################################################################
############################################################################
IP=`LANG=c getip | awk -F: '{print $1}'`

function _setPrompt() {
   export PS1="\n[ CURRENT PROJECT:\[\e[37;1m\]$PROJECT \[\e[30;1m\]]\n\[\e[30;1m\]( \[\e[1;32m\]\u\[\e[1;30m\]@IP:\[\e[0;31m\]$IP \[\e[1;30m\])-[UNAME: \[\e[2;30m\]\$(uname) \[\e[0;37m\]\[\e[1;30m\]HOST: \[\e[2;30m\]\h\[\e[0;37m\]\[\e[1;30m\] ]-(\[\e[0;32m\]\D{%H:%M:%S %p} \d\[\e[30;1m\])\[\e[30;1m\]\n(\[\e[1;33m\]\w \[\e[1;35m\]has \[\e[37;1m\]\$(/bin/ls -1 | /usr/bin/wc -l | /bin/sed 's: ::g') files, \$(/bin/ls -lah | /bin/grep -m 1 total | /bin/sed 's/total //')b\[\e[30;1m\]) --> \[\e[0m\]"
    # ^^^ I AM LOVING THIS! ^^^^^
  export PS2='-> '
  export PS4="\n"
}
function _setBookmark() {
    old="$PROJECT";
    if [ "$*" == '' ]; then
        input=`pwd`;
        input=`realpath $input`;
    else
        input=`realpath $*`;
    fi 

    if [[ "$input" == "$PROJECT" ]]; then
        echo "NO CHANGE, PROJECT ALREADY SET TO: $PROJECT";
    elif [[ "$input" != "" ]]; then
        export PROJECT=$input;
        echo "PROJECT WAS: $old";
        echo "PROJECT IS NOW: '$PROJECT' ";
    else
        noinput=`pwd`;
        if [[ "$noinput" == "$PROJECT" ]]; then
      echo "NO CHANGE, PROJECT ALREADY SET TO: $PROJECT";
        else
      export PROJECT="$noinput";
      echo "PROJECT WAS: $old";
      echo "PROJECT IS NOW: '$PROJECT' ";
        fi
    fi

  # remove it from the nth place it is in (if it is there)
  cat ~/.bookmark.set | egrep -v "$PROJECT" > ~/.bookmark.set.tmp
  
  # now put it at the top of the file
  (echo "$PROJECT"; cat ~/.bookmark.set.tmp) | head -n${total_bms} > ~/.bookmark.set

  /bin/rm ~/.bookmark.set.tmp; # >&2;

    _setPrompt;
}
function _loadBookmark() {

    if [ -f ~/.bookmark.set ]; then
    # is $i already set? did it pass through?
    re='^[0-9]+$'
    if [[ $i =~ $re ]]; then
      # use i, i is already set
      :
    elif [ "$*" == '' ]; then
      # if I isn't already set, maybe loadBookmark was called directly, we can
      # set it now, and if there was no input, use default of 1
      let  i=1;
    else
      # there was input, let's use the input
      let i=$*;
    fi 

        export PROJECT=`sed "${i}q;d" ~/.bookmark.set `;
    else
    touch ~/.bookmark.set;
        export PROJECT="~/";
    fi
  unset i;
    _setPrompt;
}
function _showBookmark() {
    echo "$PROJECT";
}
function _bm() {
  # valid input, nothing OR an Integer (or a period (.), but that is a hack)
  
  re='^[0-9]+$'
  if [[ $* =~ $re ]]; then
    # IF there is input, it IS a number, good
    :
  else
    # It is NOT a number, it better be blank then,
    if [[ $* == '' ]]; then
      # The input is blank,... good
      :
    elif [[ $* == '.' ]]; then
      # ahh, the user wants to set this as another bookmark
      _setBookmark;
      return 0;
    else
      echo "ERROR: This command takes NO INPUT or INTEGERS only.";
      return;
    fi
  fi

  if [ "$*" == '' ]; then
    # it is blank, let's just set it to 1
    let i=1;
  else
    # lets use the input the user gave us
    let i=$*;
  fi 

    _loadBookmark;

  echo "PROJECT IS NOW: $PROJECT";

    if [ $PROJECT == "~/" ]; then
        cd
    else
        cd $PROJECT;
    fi
#   _setPrompt;

}
function _getBookmark() {

  re='^[0-9]+$'
  if [[ $i =~ $re ]]; then
    # use i, i is already set
    :
  elif [ "$*" == '' ]; then
    # if I isn't already set, maybe loadBookmark was called directly, we can
    # set it now, and if there was no input, use default of 1
    let  i=1;
  else
    let i=$*;
  fi 

    _loadBookmark;
    echo -n "PROJECT IS: ";
    _showBookmark;
}
function _listBookmarks() {
  total_lines=`wc -l ~/.bookmark.set | cut -d' ' -f1 `;
  current_line=1;
  for (( c=$current_line; c<=$total_lines; c++ ))
  do
    lin=`sed "${c}q;d"  ~/.bookmark.set`;
    echo "$c: $lin";
  done
}
alias setbookmark='_setBookmark';
alias setBookmark='_setBookmark';
alias setbm='_setBookmark';
alias setBm='_setBookmark';
alias bookmark='_setBookmark';

alias showBookmark='_showBookmark';
alias showbookmark='_showBookmark';
alias showbm='_showBookmark';
alias showBm='_showBookmark';

alias listBookmarks='_listBookmarks';
alias listbookmarks='_listBookmarks';
alias listBms='_listBookmarks';
alias listbms='_listBookmarks';

alias showBookmarks='_listBookmarks';
alias showbookmarks='_listBookmarks';
alias showbms='_listBookmarks';
alias showBms='_listBookmarks';

alias loadBookmark='_loadBookmark';
alias loadbookmark='_loadBookmark';
alias loadbm='_loadBookmark';
alias loadBm='_loadBookmark';

alias getBookmark='_getBookmark';
alias getbookmark='_getBookmark';
alias getBm='_getBookmark';
alias getbm='_getBookmark';

alias setPrompt='_setPrompt';
alias bms='_listBookmarks';
alias bm='_bm'; # bm [optional NUMBER] ie: >> bm 3

#
# -----------------------------------------------------------------------------

_loadBookmark;
_setPrompt;

# -----------------------------------------------------------------------------

具体来说，我在查找文件"cat $BOOKMARKS"时遇到了问题，或者在尝试读取、写入等时遇到了问题，所以基本上，我不知道如何引用变量。
"嘿，我为一个菜鸟做了好事，对吧"

linux

1条答案

按热度按时间
3wabscal

3wabscal1#

'里面的~就是~。

$ echo '~'
~
$ ls '~'
ls: cannot access '~': No such file or directory
$ ls ~
 Android/ ....

在使用时，使用双引号括住$HOME以展开~。

export BOOKMARKS="$HOME/.bookmarks.set"

您的程式码有轻微（或更多）问题。请使用shellcheck检查您的指令码。另请参阅deprecated syntax。

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