当键入“第一命令”时，Bash可编程完成。

本文介绍了当键入“第一命令”时，Bash可编程完成。的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

有没有一种方法来控制在bash4命令提示符下键入的第一个命令的完成？

Is there a way how to control completion for first command being typed on bash4 command prompt?

我可以用complete -E来控制空行的完成，但是一旦键入某些字符，bash（或可能是readline）就会为我提供PATH中的所有文件名，内置命令（如果有，则是else ...）以及完成尝试（TAB）时的功能。

I can control completions for "empty line" with complete -E, but as soon as some characters are typed, bash (or possibly readline) gives me all filenames from PATH, builtin commands (if, then, else...) and functions on completion attempt (TAB).

我能够通过在PROMPT_COMMAND中取消设置PATH并通过绑定功能来捕获DEBUG来恢复PATH来避免PATH条目，但是由于摆脱了bash bultin命令的完成而没有运气。

I was able to avoid PATH entries by unsetting PATH in PROMPT_COMMAND and restoring it by binding function to trap DEBUG, but no luck with getting rid of bash bultin commands completions.

有什么想法吗？

推荐答案

这是bash可编程完成工具设计中的一个真正的弱点。即使默认命令完成 -D 仅对空白行中的命令也有效（前提是没有 complete -E 已指定）。缺少 complete -I （用于不完全键入的命令）之类的东西。

This is a veritable weak point in the design of bash's programmable completion facilities. Even the "default" command completion -D takes effect for commands on a blank line only (provided that no complete -E is specified). Something like complete -I (for incompletely typed-in commands) is missing.