Question

我编写了这个函数，我用它来为.bashrc文件添加别名。该功能运行良好但不完整，我想请求用户确认添加的别名是否已经存在并写入if条件以实现＆＃34;修改＆＃34;部分代码，如果给出确认，就像安装新软件包一样。

add_alias(){
  d_alias=$1
  d_command="$2"
  replacing=alias|grep "alias $d_alias"

  if [[ "$replacing" -ne 0 ]];
  then
      sed -i "/alias $d_alias/d" $HOME/.bashrc
      echo "alias $d_alias modified in ~/.bashrc"
  else

      sed -i ':a;$!{N;ba};s,\(auto-generated code\),\1\nalias '"$d_alias"'='"'$d_command'"',2' $HOME/.bashrc    
      source ~/.bashrc
      echo "alias $d_alias added to ~/.bashrc"
  fi
}


#auto-generated code
alias brc='source ~/.bashrc'
alias client='/home/user/workspace/client'
alias workspace='/home/user/workspace'

Answer 1

我添加了一个答案供将来参考，@ 4ae1e1和@ArunSangal。他们的建议在评论中。

# TODO Room to improve - add_alias()
# Add new aliases to this .bashrc file
#-------------------------------------
add_alias(){
  n_alias=$1
  shift
  n_command="$@"
  replacing=$( alias $n_alias 2>/dev/null|wc -l )

  if [[ "$replacing" = "1" ]]; 
  then
      b $n_alias # cat|grep .bashrc in color
      read -p "Do you wish to overwrite this(these) alias(es)? [y/n]" yn
        case $yn in
          [Yy]* ) sed -i '/alias '"$n_alias"'/d' $HOME/.bashrc;
              sed -i ':a;$!{N;ba};s,\(auto-generated code\),\1\nalias '"$n_alias"'='"'$n_command'"',3' $HOME/.bashrc;    
              source ~/.bashrc;
              echo "alias $n_alias modified in ~/.bashrc" ;;
          [Nn]* ) echo "Operation canceled";;
          * ) echo "Please answer yes or no.";;
    esac
  else
      sed -i ':a;$!{N;ba};s,\(auto-generated code\),\1\nalias '"$n_alias"'='"'$n_command'"',3' $HOME/.bashrc    
      source ~/.bashrc
      echo "alias $n_alias added to ~/.bashrc"
  fi
}
alias aa='add_alias'
# end of add_alias()

# auto-generated code
alias cdn='ssh cdn'
alias cdn2='ssh cdn2'
alias sxdev64="ssh sxdev64"
alias csi="ssh csi"
alias malt="ssh malt"

改进从命令行向.bashrc添加别名的功能

1 个答案: