Generate suggestions from cobra.Command recursively.

[c-bata]

Generate suggestions from cobra.Command defined at kubectl:

https://github.com/kubernetes/kubernetes/blob/d7cadf5d180277cfed7fd57d1e1a125c538bd751/pkg/kubectl/cmd/cmd.go#L221

[c-bata]

package kube

import (
    "github.com/c-bata/go-prompt"
    "github.com/spf13/cobra"
    "k8s.io/kubernetes/pkg/kubectl/cmd"
)

var (
    cobraCommand *cobra.Command
)

func init() {
    cobraCommand = cmd.NewDefaultKubectlCommand()
}

func getSubCommand(command *cobra.Command, name string) *cobra.Command {
    sub := command.Commands()
    for i := range sub {
        if sub[i].Name() == name {
            return sub[i]
        }
    }
    return nil
}

func generateSuggestions(command *cobra.Command) []prompt.Suggest {
    sub := command.Commands()
    suggests := make([]prompt.Suggest, len(sub))
    for i := range sub {
        suggests[i] = prompt.Suggest{Text: sub[i].Name(), Description: sub[i].Long}
    }
}

func argumentsCompleter(args []string) []prompt.Suggest {
    current := cobraCommand
    l := len(args)
    for i := 1; i <= l; i++ {
        if i == l {
            commands := generateSuggestions(current)
            return prompt.FilterHasPrefix(commands, args[0], true)
        }
        current = getSubCommand(current, args[i])
        if current == nil {
            break
        }
    }
    return []prompt.Suggest{}
}

todo: automatically generate flag suggesitons