如何不影响其他完成脚本重置COMP_WORDBREAKS？ [英] How to reset COMP_WORDBREAKS without effecting other completion script?

问题描述

有是，当我实现一个bash自动完成功能的东西迷惑了我，我会把它放在 /etc/bash_completion.d /

为了实现一些功能，我想删除单词间隔符的冒号（：）的变量 $ COMP_WORDBREAKS 并添加一个斜杠（ / ）在开始的 $ COMP_WORDBREAKS 。

  COMP_WORDBREAKS =/'＆GT;＆LT; =; |及（
_mytool（）
{
    当地CUR = $ {COMP_WORDS [COMP_CWORD]}
    compopt -o无空间    ＃我在这里实现    COM prePLY =（$（compgen .......... my_implement .........  -  $ CUR））
}
完成-F _mytool mytool
 

不过，我不能复位 COMP_WORDBREAKS 直接，因为该值与其他完成脚本共享。通过完成函数被调用时，变量 COMP_WORDS 阵列已经被填充，所以局部改变 COMP_WORDBREAKS 没有任何效果

是否有一个剧本完成改变 COMP_WORDBREAKS 的任何解决方案，并与其他脚本没有影响？

  $回声$ BASH_VERSION
4.2.10（1）-release
 

解决方案

修改 $ COMP_WORDBREAKS 在完成脚本不推荐的方式（因为它是一个全局变量它可能会影响其他完成脚本的行为 - 例如SSH）

不过，bash补全提供，你可以用它来实现自己的目标的一些辅助方法。

要处理非断字字符完成的话推荐的方法是利用两个辅助方法：

• _get_comp_words_by_ref 与 -n排除选项
  
  
  
  
  • 得到词到完全不考虑字符作为排除断字
  
  


• __ ltrim_colon_completions
  
  
  
  • 删除包含preFIX冒号COM prePLY项目
    
    （为 http://tiswww.case.edu/php/chet/bash/FAQ 一种变通方法 - E13）
  
  

所以，这里是如何处理一个冒号一个基本的例子（:)在完成的话：

_mytool（）
{
    当地CUR
    _get_comp_words_by_ref -n：CUR    ＃我在这里实现    COM prePLY =（$（compgen .......... my_implement ......... - $ CUR））    __ltrim_colon_completions$ CUR
}
完成-F _mytool mytool


作为最后一个提示，辅助方法位于的/ etc / bash_completion 。看看里面读取每个方法的详细描述和发现更多的helper方法。

There is something confuse me when I implement a bash auto-completion function which I'll put it in /etc/bash_completion.d/

In order to achieve some feature, I want to remove the word break characters colon (:) from variable $COMP_WORDBREAKS and add a slash (/) at begin of $COMP_WORDBREAKS.

COMP_WORDBREAKS=" /'><=;|&("
_mytool()
{
    local cur=${COMP_WORDS[COMP_CWORD]}
    compopt -o nospace

    # my implement here

    COMPREPLY=( $(compgen ..........my_implement......... -- $cur) )
}
complete -F _mytool mytool

However, I can't reset COMP_WORDBREAKS directly because the value is shared with other completion scripts. By the time the completion function gets called, variable COMP_WORDS array has already been populated, so locally changes COMP_WORDBREAKS have no effect.

Is there any solution for changing COMP_WORDBREAKS in one completion script and no effect to other script?

$ echo $BASH_VERSION
4.2.10(1)-release

解决方案

Modifying $COMP_WORDBREAKS in your completion script is not the recommended way (as it is a global variable and it could affect the behavior of other completion scripts - for example ssh).

However, bash completion offers some helper methods which you can use to achieve your goal.

The recommended way to handle non-word-breaking characters in completion words is by using the two helper methods:

• _get_comp_words_by_ref with the -n EXCLUDE option
  
  • gets the word-to-complete without considering the characters in EXCLUDE as word breaks
• __ltrim_colon_completions
  • removes colon containing prefix from COMPREPLY items
    (a workaround for http://tiswww.case.edu/php/chet/bash/FAQ - E13)

So, here is a basic example of how to a handle a colon (:) in completion words:

_mytool()
{
    local cur
    _get_comp_words_by_ref -n : cur

    # my implementation here

    COMPREPLY=( $(compgen ..........my_implement......... -- $cur) )

    __ltrim_colon_completions "$cur"
}
complete -F _mytool mytool

As a final tip, the helper methods are located in /etc/bash_completion. Take a look inside to read a detailed description of each method and to discover more helper methods.

这篇关于如何不影响其他完成脚本重置COMP_WORDBREAKS？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！