如何自动完成嵌套的多级子命令? [英] How do I autocomplete nested, multi-level subcommands?

问题描述

我正在尝试为自己的命令集开发自动完成功能或制表符完成功能.

I am trying to develop an autocomplete or tab-complete feature for my own set of commands.

例如，假设foo是我的二进制文件:

For example, assume foo is my binary:

CLI>> foo [TAB] [TAB]

它应该显示主要命令configure和show.

It should show the main commands configure and show.

然后，如果我选择configure，它将显示子命令CM，DSP和NPU:

Then if I select configure, it should show the subcommands CM, DSP and NPU:

CLI>> foo configure [TAB] [TAB]
DSP NPU CM`

我只知道如何制表和完成并显示第一级-如何获得第二级?

I only know how to tab-complete and display for the first level - how can I get the second level as well?

我将其放置在/etc/completion.d中.

我的代码:

_foo()
{
    local cur prev opts
    COMPREPLY=()
    cur="${COMP_WORDS[COMP_CWORD]}"
    prev="${COMP_WORDS[COMP_CWORD-1]}"
    words=("${COMP_WORDS[@]}")
    cword=$COMP_CWORD
    opts="configure show"
}

我对如何在configure下添加子命令CM DSP NPU感到困惑.

I'm stuck as how to add sub commands CM DSP NPU under configure.

推荐答案

以下是您的两级案例的示例脚本(其中show的子命令部分显示了如何完成-您只需删除这三行如果它们与您的情况不相关):

Here's an example script for your two-level case (with a section for subcommands of show to show how it's done - you can just delete those three lines if they're not relevant to your case):

_foo()
{
    local cur prev

    cur=${COMP_WORDS[COMP_CWORD]}
    prev=${COMP_WORDS[COMP_CWORD-1]}

    case ${COMP_CWORD} in
        1)
            COMPREPLY=($(compgen -W "configure show" -- ${cur}))
            ;;
        2)
            case ${prev} in
                configure)
                    COMPREPLY=($(compgen -W "CM DSP NPU" -- ${cur}))
                    ;;
                show)
                    COMPREPLY=($(compgen -W "some other args" -- ${cur}))
                    ;;
            esac
            ;;
        *)
            COMPREPLY=()
            ;;
    esac
}

complete -F _foo foo

希望从该示例中可以很明显地看出，如何将其扩展到三级命令等.

Hopefully it's fairly obvious from that example how you'd extend it to three-level commands etc., as well.

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