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