如何给正确的建议，以选项卡完成后，我的文字中包含冒号 [英] How to give correct suggestions to tab complete when my words contains colons

问题描述

我写一个bash标签完成文件一种实用工具，有时需要在表格上完整的URL：协议：//主机：端口。这包含两个冒号，这已经被证明是tab完成有问题的。这是因为冒号被视为断字处理。我已阅读，我不应该改变 COMP_WORDBREAKS 直接，所以我想用 _get_comp_words_by_ref 和 __ ltrim_colon_completions 的建议在这里：<一href=\"http://stackoverflow.com/questions/10528695/how-to-reset-comp-wordbreaks-without-effecting-other-completion-script/12495480#12495480\">How不影响其他完成脚本来重置COMP_WORDBREAKS？

I am writing a bash tab completion file for a utility that some times requires full URLs on the form: protocol://host:port. This contains two colons, which have proven to be problematic for tab completion. This is because the colons are treated as word breaks. I have read that I should not change COMP_WORDBREAKS directly, so I want to use the _get_comp_words_by_ref and __ltrim_colon_completions as suggested here: How to reset COMP_WORDBREAKS without effecting other completion script?

这适用于单个冒号，但第二个冒号引起正如本小例子，一个小问题：

这个例子说明了问题。它发生在任何建议数量冒号。

This example shows the problem. It occurs for any number of colons in the suggestions.

[root@2e3e8853cc0c /]# cat /etc/bash_completion.d/foo 
_foo()
{
    local cur
    COMPREPLY=()
    _get_comp_words_by_ref -n : -c cur

    COMPREPLY=( $(compgen -W "http://host:1234/aaa http://host:1234/bbb http://host:1234/ccc" -- ${cur}) )
    __ltrim_colon_completions "$cur"
    return 0
}
complete -F _foo foo

击中后富设置页成功完成公共部分。后按Tab两次，产生了以下建议：

Hitting tab after foo successfully completes the common part. Hitting tab twice after that, yields the following suggestions:

[root@2e3e8853cc0c /]# foo http://host:1234/
1234/aaa  1234/bbb  1234/ccc

期望的结果是ofcourse：

The desired result is ofcourse:

[root@2e3e8853cc0c /]# foo http://host:1234/
http://host:1234/aaa  http://host:1234/bbb  http://host:1234/ccc

在此之后，下探，b或c加标签按预期方式工作，它完成完整的URL。

After that, hitting a, b, or c plus tab works as expected, it completes the full URL.

要我怎么能产生正确的输出有什么建议？我是否需要手动更改 COM prePLY 变量，还是我只是使用函数错了？

Any suggestions to how I can produce the right output? Do I need to manually change the COMPREPLY variable, or am I just using the functions wrong?

推荐答案

我一个解决方案想出了基于我总是用一招。希望这将有助于。

I came up with a solution based on one trick I'm always using. Hope it would help.

_common_prefix()
{   
    local vname=$1
    local first prefix v

    shift
    if [[ $# -eq 0 ]]; then
        local "$vname" && _upvar "$vname" ""
        return 0
    fi

    first=$1
    shift
    for ((i = 0; i < ${#first}; ++i)); do
        prefix=${first:0:i+1}
        for v; do
            if [[ ${v:0:i+1} != "$prefix" ]]; then
                local "$vname" && _upvar "$vname" "${first:0:i}"
                return 0
            fi
        done
    done

    local "$vname" && _upvar "$vname" "$first"
    return 0
}

_bar()      
{           
    local CUR=$2
    local cur
    local -a compreply=()
    local -a urls=(ftp://gnu.org \
                   http://host1:1234/aaa \
                   http://host2:1234/bbb \
                   http://host2:1234/ccc)

    _get_comp_words_by_ref -n : -c cur

    compreply=( $(compgen -W "${urls[*]}" -- "$cur") )
    COMPREPLY=( "${compreply[@]}" )
    __ltrim_colon_completions "$cur"

    if [[ ${#COMPREPLY[@]} -gt 1 ]]; then
        local common_prefix
        _common_prefix common_prefix "${COMPREPLY[@]}"
        if [[ $common_prefix == "$CUR" ]]; then
            COMPREPLY=( "${compreply[@]}" " " )
        fi
    fi

    return 0
}

complete -F _bar bar

以下是它的样子（与测试击 33年4月3日）

[STEP 101] $ bar <TAB><TAB>
                       http://host1:1234/aaa  http://host2:1234/ccc
ftp://gnu.org          http://host2:1234/bbb
[STEP 101] $ bar f<TAB>
[STEP 101] $ bar ftp://gnu.org␣
[STEP 101] $ bar ftp://gnu.org <ENTER>
bash: bar: command not found
[STEP 102] $ bar h<TAB>
[STEP 102] $ bar http://host
[STEP 102] $ bar http://host<TAB><TAB>
                       http://host2:1234/bbb
http://host1:1234/aaa  http://host2:1234/ccc
[STEP 102] $ bar http://host2<TAB>
[STEP 102] $ bar http://host2:1234/
[STEP 102] $ bar http://host2:1234/<TAB><TAB>
                       http://host2:1234/bbb  http://host2:1234/ccc
[STEP 102] $ bar http://host2:1234/b<TAB>
[STEP 102] $ bar http://host2:1234/bbb␣
[STEP 102] $ bar http://host2:1234/bbb <ENTER>
bash: bar: command not found
[STEP 103] $

和实际问题不在于具体谈谈两个或多个冒号。一个冒号有类似的问题了。

And actually the problem is not specific about two or more colons. One colon has the similar problem too.

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