bash 补全可防止退格键

发布于 2024-09-19 03:57:10 字数 736 浏览 6 评论 0原文

我正在尝试为我编写的实用程序脚本设置 bash 完成，因此我将以下脚本添加到 /etc/bash_completion.d：

_mcd()
{
    local cur words
    COMPREPLY=()

    cur="${COMP_WORDS[COMP_CWORD]}"
    words=`mcd-completion-words`
    COMPREPLY=( $(compgen -W "${words}" -- "$cur") )
    return 0
}
complete -F _mcd mcd

mcd-completion-words 脚本以编程方式查找命令的可用运算符。当我重新启动 bash（或获取脚本）时，我可以成功使用 Tab 键完成，但如果这样做，我将无法再退格到已完成的字符之后。

另外，如果我尝试列出所有选项（例如，我尝试用制表符完成，但没有任何单词），bash 会在命令中添加一个制表符，而我也无法退格。

如何让 bash 模仿正常的文件完成行为？任何帮助表示赞赏。谢谢！

这是 mcd-completion-words 的简化测试用例，但仍然表现出相同的行为。奇怪的是，丹尼斯的案例也适用于我（例如，当替换为“一二三”时）。

#!/usr/bin/env php
<?php

print "one two three four five six seven eight nine";

原文

I am trying to set up bash completion for a utility script I wrote, so I added the following script to /etc/bash_completion.d:

_mcd()
{
    local cur words
    COMPREPLY=()

    cur="${COMP_WORDS[COMP_CWORD]}"
    words=`mcd-completion-words`
    COMPREPLY=( $(compgen -W "${words}" -- "$cur") )
    return 0
}
complete -F _mcd mcd

The mcd-completion-words script programmatically finds available operators for the command. When I restart bash (or source the script), I can successfully tab complete, but if I do so, I can no longer backspace past a completed character.

Also, if I attempt to list all options (e.g. I attempt to tab complete w/ no word in place), bash adds a tab to the command, which I also cannot backspace.

How can I make bash mimic normal file completion behavior? Any help is appreciated. Thanks!

Here's a reduced testcase for mcd-completion-words that still exhibits the same behavior. Curiously, Dennis' case works for me as well (when substituting in words="one two three", for example).

#!/usr/bin/env php
<?php

print "one two three four five six seven eight nine";

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枯叶蝶 2024-09-26 03:57:10

这是一个简化的测试用例；即使是空的“php”命令也会导致错误的完成行为：

$ _mcd() { php -r ""; COMPREPLY=( one ); }
$ complete -F _mcd mcd
$ mcd <TAB>            # Becomes 'mcd one' all right
$ mcd one <BACKSPACE>  # ERROR: doesn't work

这是在带有 bash-3.2.48/bash-4.0.33 和 bash-3.2.48/bash-4.0.33 的机器（Ubuntu）上。 php-5.2.6-3ubuntu4。在另一台机器（Debian）上有 bash-3.2.39 & php-5.2.6-1+lenny9，完成&退格键一切正常。

使用 perl -e "" 而不是 php -r "" 也可以。

不知道怎么回事，php与readline冲突？也许你可以尝试 bug-bash 邮件列表？

Here's a reduced test case; even an empty `php' command causes the erroneous completion behaviour:

$ _mcd() { php -r ""; COMPREPLY=( one ); }
$ complete -F _mcd mcd
$ mcd <TAB>            # Becomes 'mcd one' all right
$ mcd one <BACKSPACE>  # ERROR: doesn't work

This is on machine (Ubuntu) with both bash-3.2.48/bash-4.0.33 & php-5.2.6-3ubuntu4. On another machine (Debian) with bash-3.2.39 & php-5.2.6-1+lenny9, completion & backspace goes all right.

Using perl -e "" instead of php -r "" also goes all right.

Don't know what's going on, php conflicting with readline? Maybe you can try bug-bash mailing list?

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