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55 lines
858 B
55 lines
858 B
package control
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import (
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"fmt"
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"log"
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"os"
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"strings"
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)
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type Description struct {
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Short string
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Usage []string
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}
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type Command interface {
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Name() string
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Description() Description
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Execute(args []string) error
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}
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var (
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commandRegistry = make(map[string]Command)
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ctllog = log.New(os.Stderr, "v2ctl> ", 0)
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)
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func RegisterCommand(cmd Command) error {
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entry := strings.ToLower(cmd.Name())
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if entry == "" {
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return newError("empty command name")
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}
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commandRegistry[entry] = cmd
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return nil
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}
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func GetCommand(name string) Command {
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cmd, found := commandRegistry[name]
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if !found {
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return nil
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}
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return cmd
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}
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type hiddenCommand interface {
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Hidden() bool
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}
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func PrintUsage() {
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for name, cmd := range commandRegistry {
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if _, ok := cmd.(hiddenCommand); ok {
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continue
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}
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fmt.Println(" ", name, "\t\t\t", cmd.Description())
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}
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}
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