多级Bash完成 [英] Multi Level Bash Completion

问题描述

我目前有一个Bash完成文件，该文件从脚本的允许命令列表中完成一个参数(称为"pbt").这是有效的Bash完成文件:

I currently have a Bash completion file which completes a single parameter from a list of allowed commands for a script (called "pbt"). This is the working Bash Completion file:

_pbt_complete()
{
  local cur goals

  COMPREPLY=()
  cur=${COMP_WORDS[COMP_CWORD]}
  goals='asadmin clean deploy'
  cur=`echo $cur`
  COMPREPLY=($(compgen -W "${goals}" ${cur}))
}

complete -F _pbt_complete pbt

所以如果我打电话

pbt <tab>

Bash完成所有允许的命令(asadmin，clean，deploy)，这没关系.

Bash completes to all allowed commands (asadmin, clean, deploy), which is okay.

现在，我想为完成添加第二"级别.例如，如果我输入

pbt asadmin <tab>

它应该完成仅在asadmin-环境"(我还将在bash完成文件中定义)内部可用的所有选项，例如pbt asadmin [start-domain|stop-domain]但如果我键入

it should complete all options that are only available inside the asadmin-"environment" (which i'll also define inside the bash completion file), say for example pbt asadmin [start-domain|stop-domain] But if i type

pbt deploy <tab>

它应该完成另一组选项，例如pbt deploy [all|current].因此，第二个命令的选项应始终取决于第一个命令.我如何在完成文件中做到这一点?

it should complete to another set of options, for example pbt deploy [all|current]. So the options for the second command should always depend on the first command. How can i do that in the completion file?

推荐答案

感谢mkb的评论，我调查了

Thanks to mkb's comment i looked into the p4-example, which was - unlike the Git example ;) - simple enough for me to adapt it to my case. Here is the working version which does exactly what i asked for:

have pbt &&
_pbt_complete()
{
  local cur prev

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

  if [ $COMP_CWORD -eq 1 ]; then
    COMPREPLY=( $(compgen -W "asadmin deploy" -- $cur) )
  elif [ $COMP_CWORD -eq 2 ]; then
    case "$prev" in
      "asadmin")
        COMPREPLY=( $(compgen -W "start-domain stop-domain" -- $cur) )
        ;;
      "deploy")
        COMPREPLY=( $(compgen -W "all current" -- $cur) )
        ;;
      *)
        ;;
    esac
  fi

  return 0
} &&
complete -F _pbt_complete pbt

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