77 lines
1.3 KiB
Go
77 lines
1.3 KiB
Go
package ffmd
|
|
|
|
import (
|
|
"fmt"
|
|
"sort"
|
|
"strings"
|
|
|
|
"github.com/peterbourgon/ff/v3/ffcli"
|
|
)
|
|
|
|
// Tree returns a tree-representation of a ffcli.Command
|
|
func Tree(cmd *ffcli.Command) string {
|
|
t := tree{cmd.Name: commandTree(cmd)}
|
|
s := t.String(true, "")
|
|
return strings.TrimSpace(s)
|
|
}
|
|
|
|
type tree map[string]tree
|
|
|
|
func commandTree(cmd *ffcli.Command) tree {
|
|
t := tree{}
|
|
for _, sub := range cmd.Subcommands {
|
|
t[sub.Name] = commandTree(sub)
|
|
}
|
|
return t
|
|
}
|
|
|
|
func (t tree) keys() []string {
|
|
k := make([]string, 0, len(t))
|
|
for key, _ := range t {
|
|
k = append(k, key)
|
|
}
|
|
sort.Strings(k)
|
|
return k
|
|
}
|
|
|
|
func (t tree) String(root bool, padding string) string {
|
|
var s strings.Builder
|
|
index := 0
|
|
for _, k := range t.keys() {
|
|
v := t[k]
|
|
p := pipe(index, len(t))
|
|
s.WriteString(fmt.Sprintf("%s%s\n", padding+pipePad(root, p), k))
|
|
op := outerPipe(index, len(t))
|
|
s.WriteString(v.String(false, padding+pipePad(root, op)))
|
|
index++
|
|
}
|
|
return s.String()
|
|
}
|
|
|
|
func pipe(index int, len int) string {
|
|
switch {
|
|
case index+1 > len:
|
|
return " "
|
|
case index+1 == len:
|
|
return "└─"
|
|
default:
|
|
return "├─"
|
|
}
|
|
}
|
|
|
|
func outerPipe(index int, len int) string {
|
|
switch {
|
|
case index+1 == len:
|
|
return " "
|
|
default:
|
|
return "│ "
|
|
}
|
|
}
|
|
|
|
func pipePad(root bool, box string) string {
|
|
if root {
|
|
return ""
|
|
}
|
|
return box + " "
|
|
}
|