Print process tree

main.go

package main

import (
	"fmt"
	"strings"
)

type Node struct {
	Name     string
	Children []Node
}

func getTree(node Node) string {
	return getBranch(node, "")
}

func getBranch(node Node, prefix string) string {
	branch := node.Name

	for i := 0; i < len(node.Children); i++ {
		currPrefix := prefix + strings.Repeat(" ", len(node.Name)+1)
		// add extra space for non-root nodes
		if prefix != "" {
			currPrefix += " "
		}

		var marker string
		var childPrefix string
		if i < len(node.Children)-1 {
			marker = "|"
			childPrefix = "|"
		} else {
			marker = "`"
			childPrefix = " " // last child doesn't add its prefix
		}

		if len(node.Children) == 1 {
			branch += "---"
		} else if i == 0 {
			branch += "-+-"
		} else {
			branch += "\n" + currPrefix + marker + "-"
		}

		// attach child branch
		branch += getBranch(node.Children[i], currPrefix+childPrefix)
	}

	return branch
}

func main() {
	node := Node{
		Name: "init",
		Children: []Node{
			{Name: "amd"},
			{
				Name: "gnome-terminal",
				Children: []Node{
					{
						Name:     "bash",
						Children: []Node{{Name: "vim"}},
					},
					{Name: "bash"},
					{
						Name:     "bash",
						Children: []Node{{Name: "pstree"}},
					},
					{
						Name:     "bash",
						Children: []Node{{Name: "ssh"}},
					},
				},
			},
			{
				Name: "gdm",
				Children: []Node{
					{
						Name: "gdm",
						Children: []Node{
							{Name: "X"},
							{
								Name: "gnome-session",
								Children: []Node{
									{
										Name: "Gnome",
										Children: []Node{
											{Name: "gnome-extra"},
											{Name: "gnome-extra-2"},
										},
									},
									{Name: "ssh-agent"},
									{Name: "true"},
								},
							},
						},
					},
				},
			},
			{Name: "atd"},
		},
	}

	fmt.Println(getTree(node))
}

/**
Output:

init-+-amd
     |-gnome-terminal-+-bash---vim
     |                |-bash
     |                |-bash---pstree
     |                `-bash---ssh
     |-gdm---gdm-+-X
     |           `-gnome-session-+-Gnome-+-gnome-extra
     |                           |       `-gnome-extra-2
     |                           |-ssh-agent
     |                           `-true
     `-atd
*/

Btw, here

+-bash---vim
     |                |-bash
     |                |-bash---pstree
     |                `-bash---ssh

bash is the parent of pstree, and bash is the parent of ssh. So you shouldn't build the node with this -> {Name: "bash---pstree"}.
Like your approach!

Got it - fixed!