gtree

README

[^1]

Using either Markdown or Programmatically to generate directory trees🌳 and directories🗂, and to verify directories🔍. Provide CLI, Golang library and Web.

Table of Contents

• Acknowledgments
• Features
  • Web
  • CLI
  • Library - Markdown to tree structure
  • Library - Programmable tree structure
    • Recommended for developers!👍
• Documents
• Process
• Performance
• Test coverage

Acknowledgments

Thanks for providing very useful CLI for cloud storage tree output🤩🎉
Everyone is encouraged to use them!

⭐orangekame3/stree

CLI for Amazon S3 tree output.
aws s3 command does not do what tree command does, but stree command can display tree!

⭐owlinux1000/gcstree

CLI for Google Cloud Storage tree output.
gcloud storage command does not do what tree command does, but gcstree command can display tree!

Web

https://ddddddo.github.io/gtree/

This page is that converts from Markdown to tree!
This page calls a function that outputs tree. This function is a Go package compiled as WebAssembly.
The symbols that can be used in Markdown are *, -, +, and #.
Indentation represents hierarchy. The indentation can be whatever you specify, but use the same pattern.
You can change the branches like in the image below.
Also, once loaded, you can enjoy offline!

You can open it in your browser with

$ gtree web

source code

CLI

Installation

Go (requires 1.18 or later)
$ go install github.com/ddddddO/gtree/cmd/gtree@latest

Homebrew
$ brew install ddddddO/tap/gtree

Scoop
$ scoop bucket add ddddddO https://github.com/ddddddO/scoop-bucket.git
$ scoop install ddddddO/gtree

deb
$ export GTREE_VERSION=X.X.X
$ curl -o gtree.deb -L https://github.com/ddddddO/gtree/releases/download/v$GTREE_VERSION/gtree_$GTREE_VERSION-1_amd64.deb
$ dpkg -i gtree.deb

rpm
$ export GTREE_VERSION=X.X.X
$ yum install https://github.com/ddddddO/gtree/releases/download/v$GTREE_VERSION/gtree_$GTREE_VERSION-1_amd64.rpm

apk
$ export GTREE_VERSION=X.X.X
$ curl -o gtree.apk -L https://github.com/ddddddO/gtree/releases/download/v$GTREE_VERSION/gtree_$GTREE_VERSION-1_amd64.apk
$ apk add --allow-untrusted gtree.apk

AUR
$ wip...

Nix
$ nix-env -i gtree
or
$ nix-shell -p gtree

MacPorts
$ port install gtree

aqua
$ aqua g -i ddddddO/gtree

Docker
$ docker pull ghcr.io/ddddddo/gtree:latest
$ docker run ghcr.io/ddddddo/gtree:latest template | docker run -i ghcr.io/ddddddo/gtree:latest output
gtree
├── cmd
│   └── gtree
│       └── main.go
├── testdata
│   ├── sample1.md
│   └── sample2.md
├── Makefile
└── tree.go

etc

download binary from here.

Usage

$ gtree --help
NAME:
   gtree - This CLI uses Markdown to generate directory trees and directories itself, and also verifies directories.
           The symbols that can be used in Markdown are '-', '+', '*', and '#'.
           Within Markdown, indentation represents hierarchy. The indentation can be whatever you specify, but use the same pattern.

USAGE:
   gtree [global options] command [command options] [arguments...]

VERSION:
   1.10.2 / revision 85520a1

COMMANDS:
   output, o, out     Outputs tree from markdown.
                      Let's try 'gtree template | gtree output'.
   mkdir, m           Makes directories and files from markdown. It is possible to dry run.
                      Let's try 'gtree template | gtree mkdir -e .go -e .md -e Makefile'.
   verify, vf         Verifies tree structure represented in markdown by comparing it with existing directories.
                      Let's try 'gtree template | gtree verify'.
   template, t, tmpl  Outputs markdown template. Use it to try out gtree CLI.
   web, w, www        Opens "Tree Maker" in your browser and shows the URL in terminal.
   version, v         Prints the version.
   help, h            Shows a list of commands or help for one command

GLOBAL OPTIONS:
   --help, -h     show help
   --version, -v  print the version

Output subcommand

$ gtree output --help
NAME:
   gtree output - Outputs tree from markdown.
                  Let's try 'gtree template | gtree output'.

USAGE:
   gtree output [command options] [arguments...]

OPTIONS:
   --file value, -f value               specify the path to markdown file. (default: stdin)
   --massive, -m                        set this option when there are very many blocks of markdown. (default: false)
   --massive-timeout value, --mt value  set this option if you want to set a timeout. (default: 0s)
   --format value                       set this option when specifying output format. "json", "yaml", "toml"
   --watch, -w                          follow changes in markdown file. (default: false)
   --help, -h                           show help

Try it!

$ gtree template
- gtree
        - cmd
                - gtree
                        - main.go
        - testdata
                - sample1.md
                - sample2.md
        - Makefile
        - tree.go
$ gtree template | gtree output
gtree
├── cmd
│   └── gtree
│       └── main.go
├── testdata
│   ├── sample1.md
│   └── sample2.md
├── Makefile
└── tree.go

Other pattern.

├── gtree output -f testdata/sample1.md
├── cat testdata/sample1.md | gtree output -f -
└── cat testdata/sample1.md | gtree output

Usage other than representing a directory.

$ cat testdata/sample2.md | gtree output
k8s_resources
├── (Tier3)
│   └── (Tier2)
│       └── (Tier1)
│           └── (Tier0)
├── Deployment
│   └── ReplicaSet
│       └── Pod
│           └── container(s)
├── CronJob
│   └── Job
│       └── Pod
│           └── container(s)
└── (empty)
    ├── DaemonSet
    │   └── Pod
    │       └── container(s)
    └── StatefulSet
        └── Pod
            └── container(s)

Multiple roots

$ cat testdata/sample6.md | gtree output
Artiodactyla
├── Artiofabula
│   ├── Cetruminantia
│   │   ├── Whippomorpha
│   │   │   ├── Hippopotamidae
│   │   │   └── Cetacea
│   │   └── Ruminantia
│   └── Suina
└── Tylopoda
Carnivora
├── Feliformia
└── Caniformia
    ├── Canidae
    └── Arctoidea
        ├── Ursidae
        └── x
            ├── Pinnipedia
            └── Musteloidea
                ├── Ailuridae
                └── x
                    ├── Mephitidae
                    └── x
                        ├── Procyonidae
                        └── Mustelidae

Output JSON

$ cat testdata/sample5.md | gtree output --format json | jq
{
  "value": "a",
  "children": [
    {
      "value": "i",
      "children": [
        {
          "value": "u",
          "children": [
            {
              "value": "k",
              "children": null
            },
            {
              "value": "kk",
              "children": null
            }
          ]
        },
        {
          "value": "t",
          "children": null
        }
      ]
    },
    {
      "value": "e",
      "children": [
        {
          "value": "o",
          "children": null
        }
      ]
    },
    {
      "value": "g",
      "children": null
    }
  ]
}

Output YAML

$ cat testdata/sample5.md | gtree output --format yaml
value: a
children:
- value: i
  children:
  - value: u
    children:
    - value: k
      children: []
    - value: kk
      children: []
  - value: t
    children: []
- value: e
  children:
  - value: o
    children: []
- value: g
  children: []

Output TOML

$ cat testdata/sample5.md | gtree output --format toml
value = 'a'
[[children]]
value = 'i'
[[children.children]]
value = 'u'
[[children.children.children]]
value = 'k'
children = []
[[children.children.children]]
value = 'kk'
children = []

[[children.children]]
value = 't'
children = []

[[children]]
value = 'e'
[[children.children]]
value = 'o'
children = []

[[children]]
value = 'g'
children = []

Mkdir subcommand

$ gtree mkdir --help
NAME:
   gtree mkdir - Makes directories and files from markdown. It is possible to dry run.
                 Let's try 'gtree template | gtree mkdir -e .go -e .md -e Makefile'.

USAGE:
   gtree mkdir [command options] [arguments...]

OPTIONS:
   --file value, -f value                                       specify the path to markdown file. (default: stdin)
   --dry-run, -d                                                dry run. detects node that is invalid for directory generation. the order of the output and made directories does not always match. (default: false)
   --extension value, -e value [ --extension value, -e value ]  set this option if you want to create file instead of directory. for example, if you want to generate files with ".go" extension: "-e .go"
   --target-dir value                                           set this option if you want to specify the directory you want to make directory. (default: current directory)
   --help, -h                                                   show help

Try it!

$ gtree template
- gtree
        - cmd
                - gtree
                        - main.go
        - testdata
                - sample1.md
                - sample2.md
        - Makefile
        - tree.go
$ gtree template | gtree mkdir
$ tree gtree/
gtree/
├── cmd
│   └── gtree
│       └── main.go
├── Makefile
├── testdata
│   ├── sample1.md
│   └── sample2.md
└── tree.go

8 directories, 0 files

make directories and files

$ gtree template
- gtree
        - cmd
                - gtree
                        - main.go
        - testdata
                - sample1.md
                - sample2.md
        - Makefile
        - tree.go
$ gtree template | gtree mkdir -e .go -e .md -e Makefile
$ tree gtree/
gtree/
├── cmd
│   └── gtree
│       └── main.go
├── Makefile
├── testdata
│   ├── sample1.md
│   └── sample2.md
└── tree.go

3 directories, 5 files

dry run

Does not create a file and directory.

$ gtree template | gtree mkdir --dry-run -e .go -e .md -e Makefile
gtree
├── cmd
│   └── gtree
│       └── main.go
├── testdata
│   ├── sample1.md
│   └── sample2.md
├── Makefile
└── tree.go

4 directories, 5 files

Any invalid file or directory name will result in an error.

$ gtree mkdir --dry-run <<EOS
- root
  - aa
  - bb
    - b/b
EOS
invalid node name: b/b

$ gtree mkdir --dry-run <<EOS
- /root
  - aa
  - bb
    - bb
EOS
invalid node name: /root

Verify subcommand

$ gtree verify --help
NAME:
   gtree verify - Verifies tree structure represented in markdown by comparing it with existing directories.
                  Let's try 'gtree template | gtree verify'.

USAGE:
   gtree verify [command options] [arguments...]

OPTIONS:
   --file value, -f value  specify the path to markdown file. (default: stdin)
   --target-dir value      set this option if you want to specify the directory you want to verify. (default: current directory)
   --strict                set this option if you want strict directory match validation. (default: non strict)
   --help, -h              show help

Try it!

$ tree example
example
├── README.md
├── find_pipe_programmable-gtree
│   ├── README.md
│   ├── go.mod
│   ├── go.sum
│   └── main.go
├── go-list_pipe_programmable-gtree
│   ├── README.md
│   ├── go.mod
│   ├── go.sum
│   └── main.go
├── like_cli
│   ├── adapter
│   │   ├── executor.go
│   │   └── indentation.go
│   └── main.go
├── noexist
│   └── xxx
└── programmable
    └── main.go

6 directories, 14 files
$ cat testdata/sample9.md
- example
        - README.md
        - find_pipe_programmable-gtree
                - README.md
                - go.mod
                - go.sum
                - main.go
        - go-list_pipe_programmable-gtree
                - README.md
                - go.mod
                - go.sum
                - main.go
        - like_cli
                - adapter
                        - executor.go
                        - indentation.go
                - main.go
                - kkk
        - programmable
                - main.go
$ cat testdata/sample9.md | gtree verify --strict
Extra paths exist:
        example/noexist
        example/noexist/xxx
Required paths does not exist:
        example/like_cli/kkk

inspired by mactat/framed !

Library - Markdown to tree structure

Installation

Go version requires 1.18 or later.

$ go get github.com/ddddddO/gtree

Usage

The symbols that can be used in Markdown are *, -, +, and #.

Function	Description	Available optional functions
Output	can output trees	WithBranchFormatIntermedialNode WithBranchFormatLastNode WithEncodeJSON WithEncodeTOML WithEncodeYAML WithMassive
Mkdir	can create directories	WithTargetDir WithFileExtensions WithDryRun WithMassive
Verify	can output the difference between markdown and directories	WithTargetDir WithStrictVerify WithMassive
Walk	can execute user-defined function while traversing tree structure recursively	WithBranchFormatIntermedialNode WithBranchFormatLastNode WithMassive

Output func

package main

import (
	"bytes"
	"fmt"
	"os"
	"strings"

	"github.com/ddddddO/gtree"
)

func main() {
	r1 := bytes.NewBufferString(strings.TrimSpace(`
- root
	- dddd
		- kkkkkkk
			- lllll
				- ffff
				- LLL
					- WWWWW
						- ZZZZZ
				- ppppp
					- KKK
						- 1111111
							- AAAAAAA
	- eee`))
	if err := gtree.Output(os.Stdout, r1); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// root
	// ├── dddd
	// │   └── kkkkkkk
	// │       └── lllll
	// │           ├── ffff
	// │           ├── LLL
	// │           │   └── WWWWW
	// │           │       └── ZZZZZ
	// │           └── ppppp
	// │               └── KKK
	// │                   └── 1111111
	// │                       └── AAAAAAA
	// └── eee

	r2 := bytes.NewBufferString(strings.TrimSpace(`
- a
  - i
    - u
      - k
      - kk
    - t
  - e
    - o
  - g`))

	// You can customize branch format.
	if err := gtree.Output(os.Stdout, r2,
		gtree.WithBranchFormatIntermedialNode("+->", ":   "),
		gtree.WithBranchFormatLastNode("+->", "    "),
	); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// a
	// +-> i
	// :   +-> u
	// :   :   +-> k
	// :   :   +-> kk
	// :   +-> t
	// +-> e
	// :   +-> o
	// +-> g
}

You can also output JSON/YAML/TOML.

• gtree.WithEncodeJSON()
• gtree.WithEncodeTOML()
• gtree.WithEncodeYAML()

Mkdir func

gtree.Mkdir func makes directories.

You can use gtree.WithFileExtensions func to make specified extensions as file.

Verify func

gtree.Verify func verifies directories.

You can use gtree.WithTargetDir func / gtree.WithStrictVerify func.

Walk func

See sample program

package main

import (
	"fmt"
	"os"
	"strings"

	"github.com/ddddddO/gtree"
)

func main() {
	src := strings.TrimSpace(`
- a
  - i
    - u
      - k
  - kk
    - t
- e
  - o
    - g`)

	callback := func(wn *gtree.WalkerNode) error {
		fmt.Println(wn.Row())
		return nil
	}

	if err := gtree.Walk(strings.NewReader(src), callback); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// a
	// ├── i
	// │   └── u
	// │       └── k
	// └── kk
	//     └── t
	// e
	// └── o
	//     └── g

	callback2 := func(wn *gtree.WalkerNode) error {
		fmt.Println("WalkerNode's methods called...")
		fmt.Printf("\tName     : %s\n", wn.Name())
		fmt.Printf("\tBranch   : %s\n", wn.Branch())
		fmt.Printf("\tRow      : %s\n", wn.Row())
		fmt.Printf("\tLevel    : %d\n", wn.Level())
		fmt.Printf("\tPath     : %s\n", wn.Path())
		fmt.Printf("\tHasChild : %t\n", wn.HasChild())
		return nil
	}

	if err := gtree.Walk(strings.NewReader(src), callback2); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// WalkerNode's methods called...
	// 	Name     : a
	// 	Branch   : 
	// 	Row      : a
	// 	Level    : 1
	// 	Path     : a
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : i
	// 	Branch   : ├──
	// 	Row      : ├── i
	// 	Level    : 2
	// 	Path     : a/i
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : u
	// 	Branch   : │   └──
	// 	Row      : │   └── u
	// 	Level    : 3
	// 	Path     : a/i/u
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : k
	// 	Branch   : │       └──
	// 	Row      : │       └── k
	// 	Level    : 4
	// 	Path     : a/i/u/k
	// 	HasChild : false
	// WalkerNode's methods called...
	// 	Name     : kk
	// 	Branch   : └──
	// 	Row      : └── kk
	// 	Level    : 2
	// 	Path     : a/kk
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : t
	// 	Branch   :     └──
	// 	Row      :     └── t
	// 	Level    : 3
	// 	Path     : a/kk/t
	// 	HasChild : false
	// WalkerNode's methods called...
	// 	Name     : e
	// 	Branch   : 
	// 	Row      : e
	// 	Level    : 1
	// 	Path     : e
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : o
	// 	Branch   : └──
	// 	Row      : └── o
	// 	Level    : 2
	// 	Path     : e/o
	// 	HasChild : true
	// WalkerNode's methods called...
	// 	Name     : g
	// 	Branch   :     └──
	// 	Row      :     └── g
	// 	Level    : 3
	// 	Path     : e/o/g
	// 	HasChild : false
}

inspired by xlab/treeprint !

Library - Programmable tree structure

[!NOTE] The gonew command can be used to set up sample project using gtree library.
See here for details.

Installation

Go version requires 1.18 or later.

$ go get github.com/ddddddO/gtree

Usage

Function	Description	Available optional functions
OutputProgrammably	can output tree	WithBranchFormatIntermedialNode WithBranchFormatLastNode WithEncodeJSON WithEncodeTOML WithEncodeYAML
MkdirProgrammably	can create directories	WithTargetDir WithFileExtensions WithDryRun
VerifyProgrammably	can output the difference between tree you composed and directories	WithTargetDir WithStrictVerify
WalkProgrammably	can execute user-defined function while traversing tree structure recursively	WithBranchFormatIntermedialNode WithBranchFormatLastNode

OutputProgrammably func

package main

import (
	"fmt"
	"os"

	"github.com/ddddddO/gtree"
)

func main() {
	var root *gtree.Node = gtree.NewRoot("root")
	root.Add("child 1").Add("child 2").Add("child 3")
	var child4 *gtree.Node = root.Add("child 1").Add("child 2").Add("child 4")
	child4.Add("child 5")
	child4.Add("child 6").Add("child 7")
	root.Add("child 8")
	// you can customize branch format.
	if err := gtree.OutputProgrammably(os.Stdout, root,
		gtree.WithBranchFormatIntermedialNode("+--", ":   "),
		gtree.WithBranchFormatLastNode("+--", "    "),
	); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// root
	// +-- child 1
	// :   +-- child 2
	// :       +-- child 3
	// :       +-- child 4
	// :           +-- child 5
	// :           +-- child 6
	// :               +-- child 7
	// +-- child 8

	primate := preparePrimate()
	// default branch format.
	if err := gtree.OutputProgrammably(os.Stdout, primate); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// Primate
	// ├── Strepsirrhini
	// │   ├── Lemuriformes
	// │   │   ├── Lemuroidea
	// │   │   │   ├── Cheirogaleidae
	// │   │   │   ├── Indriidae
	// │   │   │   ├── Lemuridae
	// │   │   │   └── Lepilemuridae
	// │   │   └── Daubentonioidea
	// │   │       └── Daubentoniidae
	// │   └── Lorisiformes
	// │       ├── Galagidae
	// │       └── Lorisidae
	// └── Haplorrhini
	//     ├── Tarsiiformes
	//     │   └── Tarsiidae
	//     └── Simiiformes
	//         ├── Platyrrhini
	//         │   ├── Ceboidea
	//         │   │   ├── Atelidae
	//         │   │   └── Cebidae
	//         │   └── Pithecioidea
	//         │       └── Pitheciidae
	//         └── Catarrhini
	//             ├── Cercopithecoidea
	//             │   └── Cercopithecidae
	//             └── Hominoidea
	//                 ├── Hylobatidae
	//                 └── Hominidae
}

func preparePrimate() *gtree.Node {
	primate := gtree.NewRoot("Primate")
	strepsirrhini := primate.Add("Strepsirrhini")
	haplorrhini := primate.Add("Haplorrhini")
	lemuriformes := strepsirrhini.Add("Lemuriformes")
	lorisiformes := strepsirrhini.Add("Lorisiformes")

	lemuroidea := lemuriformes.Add("Lemuroidea")
	lemuroidea.Add("Cheirogaleidae")
	lemuroidea.Add("Indriidae")
	lemuroidea.Add("Lemuridae")
	lemuroidea.Add("Lepilemuridae")

	lemuriformes.Add("Daubentonioidea").Add("Daubentoniidae")

	lorisiformes.Add("Galagidae")
	lorisiformes.Add("Lorisidae")

	haplorrhini.Add("Tarsiiformes").Add("Tarsiidae")
	simiiformes := haplorrhini.Add("Simiiformes")

	platyrrhini := haplorrhini.Add("Platyrrhini")
	ceboidea := platyrrhini.Add("Ceboidea")
	ceboidea.Add("Atelidae")
	ceboidea.Add("Cebidae")
	platyrrhini.Add("Pithecioidea").Add("Pitheciidae")

	catarrhini := simiiformes.Add("Catarrhini")
	catarrhini.Add("Cercopithecoidea").Add("Cercopithecidae")
	hominoidea := catarrhini.Add("Hominoidea")
	hominoidea.Add("Hylobatidae")
	hominoidea.Add("Hominidae")

	return primate
}

The program below converts the result of find into a tree.

package main

import (
	"bufio"
	"fmt"
	"os"
	"strings"

	"github.com/ddddddO/gtree"
)

// Example:
// $ cd github.com/ddddddO/gtree
// $ find . -type d -name .git -prune -o -type f -print
// ./config.go
// ./node_generator_test.go
// ./example/like_cli/adapter/indentation.go
// ./example/like_cli/adapter/executor.go
// ./example/like_cli/main.go
// ./example/find_pipe_programmable-gtree/main.go
// ...
// $ find . -type d -name .git -prune -o -type f -print | go run example/find_pipe_programmable-gtree/main.go
// << See "Output:" below. >>
func main() {
	var (
		root *gtree.Node
		node *gtree.Node
	)
	scanner := bufio.NewScanner(os.Stdin)
	for scanner.Scan() {
		line := scanner.Text()              // e.g.) "./example/find_pipe_programmable-gtree/main.go"
		splited := strings.Split(line, "/") // e.g.) [. example find_pipe_programmable-gtree main.go]

		for i, s := range splited {
			if root == nil {
				root = gtree.NewRoot(s) // s := "."
				node = root
				continue
			}
			if i == 0 {
				continue
			}

			tmp := node.Add(s)
			node = tmp
		}
		node = root
	}

	if err := gtree.OutputProgrammably(os.Stdout, root); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// .
	// ├── config.go
	// ├── node_generator_test.go
	// ├── example
	// │   ├── like_cli
	// │   │   ├── adapter
	// │   │   │   ├── indentation.go
	// │   │   │   └── executor.go
	// │   │   └── main.go
	// │   ├── find_pipe_programmable-gtree
	// │   │   └── main.go
	// │   ├── go-list_pipe_programmable-gtree
	// │   │   └── main.go
	// │   └── programmable
	// │       └── main.go
	// ├── file_considerer.go
	// ├── node.go
	// ├── node_generator.go
	// ├── .gitignore
	// ...
}

MkdirProgrammably func

package main

import (
	"fmt"

	"github.com/ddddddO/gtree"
)

func main() {
	primate := preparePrimate()
	if err := gtree.MkdirProgrammably(primate); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output(using Linux 'tree' command):
	// 22:20:43 > tree Primate/
	// Primate/
	// ├── Haplorrhini
	// │   ├── Simiiformes
	// │   │   ├── Catarrhini
	// │   │   │   ├── Cercopithecoidea
	// │   │   │   │   └── Cercopithecidae
	// │   │   │   └── Hominoidea
	// │   │   │       ├── Hominidae
	// │   │   │       └── Hylobatidae
	// │   │   └── Platyrrhini
	// │   │       ├── Ceboidea
	// │   │       │   ├── Atelidae
	// │   │       │   └── Cebidae
	// │   │       └── Pithecioidea
	// │   │           └── Pitheciidae
	// │   └── Tarsiiformes
	// │       └── Tarsiidae
	// └── Strepsirrhini
	// 	├── Lemuriformes
	// 	│   ├── Daubentonioidea
	// 	│   │   └── Daubentoniidae
	// 	│   └── Lemuroidea
	// 	│       ├── Cheirogaleidae
	// 	│       ├── Indriidae
	// 	│       ├── Lemuridae
	// 	│       └── Lepilemuridae
	// 	└── Lorisiformes
	// 		├── Galagidae
	// 		└── Lorisidae
	//
	// 28 directories, 0 files
}

details

Make directories and files with specific extensions.

package main

import (
	"fmt"

	"github.com/ddddddO/gtree"
)

func main() {
	gtreeDir := gtree.NewRoot("gtree")
	gtreeDir.Add("cmd").Add("gtree").Add("main.go")
	gtreeDir.Add("Makefile")
	testdataDir := gtreeDir.Add("testdata")
	testdataDir.Add("sample1.md")
	testdataDir.Add("sample2.md")
	gtreeDir.Add("tree.go")

	// make directories and files with specific extensions.
	if err := gtree.MkdirProgrammably(
		gtreeDir,
		gtree.WithFileExtensions([]string{".go", ".md", "Makefile"}),
	); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output(using Linux 'tree' command):
	// 09:44:50 > tree gtree/
	// gtree/
	// ├── cmd
	// │   └── gtree
	// │       └── main.go
	// ├── Makefile
	// ├── testdata
	// │   ├── sample1.md
	// │   └── sample2.md
	// └── tree.go
	//
	// 3 directories, 5 files
}

VerifyProgrammably func

You can use gtree.WithTargetDir func / gtree.WithStrictVerify func.

WalkProgrammably func

package main

import (
	"fmt"
	"os"

	"github.com/ddddddO/gtree"
)

func main() {
	root := gtree.NewRoot("root")
	root.Add("child 1").Add("child 2").Add("child 3")
	root.Add("child 5")
	root.Add("child 1").Add("child 2").Add("child 4")

	callback := func(wn *gtree.WalkerNode) error {
		fmt.Println(wn.Row())
		return nil
	}

	if err := gtree.WalkProgrammably(root, callback); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// root
	// ├── child 1
	// │   └── child 2
	// │       ├── child 3
	// │       └── child 4
	// └── child 5

	callback2 := func(wn *gtree.WalkerNode) error {
		fmt.Println("WalkerNode's methods called...")
		fmt.Printf("\tName     : %s\n", wn.Name())
		fmt.Printf("\tBranch   : %s\n", wn.Branch())
		fmt.Printf("\tRow      : %s\n", wn.Row())
		fmt.Printf("\tLevel    : %d\n", wn.Level())
		fmt.Printf("\tPath     : %s\n", wn.Path())
		fmt.Printf("\tHasChild : %t\n", wn.HasChild())
		return nil
	}

	if err := gtree.WalkProgrammably(root, callback2); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	// Output:
	// WalkerNode's methods called...
	//         Name     : root
	//         Branch   : 
	//         Row      : root
	//         Level    : 1
	//         Path     : root
	//         HasChild : true
	// WalkerNode's methods called...
	//         Name     : child 1
	//         Branch   : ├──
	//         Row      : ├── child 1
	//         Level    : 2
	//         Path     : root/child 1
	//         HasChild : true
	// WalkerNode's methods called...
	//         Name     : child 2
	//         Branch   : │   └──
	//         Row      : │   └── child 2
	//         Level    : 3
	//         Path     : root/child 1/child 2
	//         HasChild : true
	// WalkerNode's methods called...
	//         Name     : child 3
	//         Branch   : │       ├──
	//         Row      : │       ├── child 3
	//         Level    : 4
	//         Path     : root/child 1/child 2/child 3
	//         HasChild : false
	// WalkerNode's methods called...
	//         Name     : child 4
	//         Branch   : │       └──
	//         Row      : │       └── child 4
	//         Level    : 4
	//         Path     : root/child 1/child 2/child 4
	//         HasChild : false
	// WalkerNode's methods called...
	//         Name     : child 5
	//         Branch   : └──
	//         Row      : └── child 5
	//         Level    : 2
	//         Path     : root/child 5
	//         HasChild : false
}

Process

[!NOTE] This process is for the Massive Roots mode.

e.g. gtree/pipeline_tree.go

Performance

[!WARNING] Depends on the environment.

• Comparison simple implementation and pipeline implementation.
• In the case of few Roots, simple implementation is faster in execution!
  • Use this one by default.
• However, for multiple Roots, pipeline implementation execution speed tends to be faster💪✨
  • In the CLI, it is available by specifying --massive.
  • In the Go program, it is available by specifying WithMassive func.

Benchmark log

Simple implementation

11:19:22 > go test -benchmem -bench Benchmark -benchtime 100x benchmark_simple_test.go
goos: linux
goarch: amd64
cpu: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
BenchmarkOutput_singleRoot-4                 100             35375 ns/op           13856 B/op        171 allocs/op
BenchmarkOutput_tenRoots-4                   100            200540 ns/op           72920 B/op       1597 allocs/op
BenchmarkOutput_fiftyRoots-4                 100            730156 ns/op          569851 B/op       7919 allocs/op
BenchmarkOutput_hundredRoots-4               100           1706493 ns/op         1714260 B/op      15820 allocs/op
BenchmarkOutput_fiveHundredsRoots-4          100          16412090 ns/op        32245140 B/op      79022 allocs/op
BenchmarkOutput_thousandRoots-4              100          55142492 ns/op        120929674 B/op    158025 allocs/op
BenchmarkOutput_3000Roots-4                  100         489121246 ns/op        1035617527 B/op   474029 allocs/op
BenchmarkOutput_6000Roots-4                  100        1613641261 ns/op        4087694372 B/op   948033 allocs/op
BenchmarkOutput_10000Roots-4                 100        3913090646 ns/op        11293191221 B/op         1580035 allocs/op
PASS
ok      command-line-arguments  614.944s

Pipeline implementation

11:29:43 > go test -benchmem -bench Benchmark -benchtime 100x benchmark_pipeline_test.go
goos: linux
goarch: amd64
cpu: Intel(R) Core(TM) i5-7200U CPU @ 2.50GHz
BenchmarkOutput_pipeline_singleRoot-4                100            188706 ns/op           24236 B/op        300 allocs/op
BenchmarkOutput_pipeline_tenRoots-4                  100            367758 ns/op          115970 B/op       2186 allocs/op
BenchmarkOutput_pipeline_fiftyRoots-4                100            947879 ns/op          542188 B/op      10592 allocs/op
BenchmarkOutput_pipeline_hundredRoots-4              100           1711537 ns/op         1099636 B/op      21094 allocs/op
BenchmarkOutput_pipeline_fiveHundredsRoots-4         100           6892261 ns/op         5524905 B/op     105107 allocs/op
BenchmarkOutput_pipeline_thousandRoots-4             100          13100335 ns/op        11225942 B/op     210115 allocs/op
BenchmarkOutput_pipeline_3000Roots-4                 100          40694497 ns/op        33399766 B/op     630142 allocs/op
BenchmarkOutput_pipeline_6000Roots-4                 100          85807944 ns/op        66974524 B/op    1260171 allocs/op
BenchmarkOutput_pipeline_10000Roots-4                100         151486713 ns/op        113908462 B/op   2100208 allocs/op
PASS
ok      command-line-arguments  30.670s

Documents

• GoDoc

English

• Want to output a tree in Go?
• Generate directory trees🌳 and the directories itself📁 using Markdown or Programmatically.

Japanese

• Goでtreeを表現する
• Markdown形式の入力からtreeを出力するCLI/Web
• Markdown形式の入力からファイル/ディレクトリを生成するCLI/Goパッケージ
• 盆栽 (節目の記事)
• 感想

Test coverage

...generated by nikolaydubina/go-cover-treemap !

Star History

[^1]: Gopher retrieved from egonelbre/gophers !

Documentation

Overview

Package gtree provides output or directory creation of tree structure.

Example

package main

import (
	"bytes"
	"fmt"
	"os"

	"github.com/ddddddO/gtree"
)

func main() {
	var root *gtree.Node = gtree.NewRoot("root")
	root.Add("child 1").Add("child 2")
	root.Add("child 1").Add("child 3")
	child4 := root.Add("child 4")

	var child7 *gtree.Node = child4.Add("child 5").Add("child 6").Add("child 7")
	child7.Add("child 8")

	buf := &bytes.Buffer{}
	if err := gtree.OutputProgrammably(buf, root); err != nil {
		fmt.Fprintln(os.Stderr, err)
		os.Exit(1)
	}
	fmt.Println(buf.String())
}

Output:

root
├── child 1
│   ├── child 2
│   └── child 3
└── child 4
    └── child 5
        └── child 6
            └── child 7
                └── child 8

Index

• Variables
• func Mkdir(r io.Reader, options ...Option) error
• func MkdirProgrammably(root *Node, options ...Option) error
• func Output(w io.Writer, r io.Reader, options ...Option) error
• func OutputProgrammably(w io.Writer, root *Node, options ...Option) error
• func Verify(r io.Reader, options ...Option) error
• func VerifyProgrammably(root *Node, options ...Option) error
• func Walk(r io.Reader, callback func(*WalkerNode) error, options ...Option) error
• func WalkProgrammably(root *Node, callback func(*WalkerNode) error, options ...Option) error
• type Node
  • func NewRoot(text string) *Node
  • func (parent *Node) Add(text string) *Node
• type Option
  • func WithBranchFormatIntermedialNode(directly, indirectly string) Option
  • func WithBranchFormatLastNode(directly, indirectly string) Option
  • func WithDryRun() Option
  • func WithEncodeJSON() Option
  • func WithEncodeTOML() Option
  • func WithEncodeYAML() Option
  • func WithFileExtensions(extensions []string) Option
  • func WithMassive(ctx context.Context) Option
  • func WithStrictVerify() Option
  • func WithTargetDir(dir string) Option
• type WalkerNode
  • func (wn *WalkerNode) Branch() string
  • func (wn *WalkerNode) HasChild() bool
  • func (wn *WalkerNode) Level() uint
  • func (wn *WalkerNode) Name() string
  • func (wn *WalkerNode) Path() string
  • func (wn *WalkerNode) Row() string

Examples

• Package

Variables

var (
	// ErrNilNode is returned if the argument *gtree.Node of OutputProgrammably / MkdirProgrammably / VerifyProgrammably function is nill.
	ErrNilNode = errors.New("nil node")
	// ErrNotRoot is returned if the argument *gtree.Node of OutputProgrammably / MkdirProgrammably / VerifyProgrammably function is not root of the tree.
	ErrNotRoot = errors.New("not root node")
)

var (
	// ErrExistPath is returned if the argument *gtree.Node of MkdirProgrammably function is path already exists.
	ErrExistPath = errors.New("path already exists")
)

Functions

func Mkdir

func Mkdir(r io.Reader, options ...Option) error

Mkdir makes directories.

func MkdirProgrammably

func MkdirProgrammably(root *Node, options ...Option) error

MkdirProgrammably makes directories. This function requires node generated by NewRoot function.

func Output

func Output(w io.Writer, r io.Reader, options ...Option) error

Output outputs a tree to w with r as Markdown format input.

func OutputProgrammably

func OutputProgrammably(w io.Writer, root *Node, options ...Option) error

OutputProgrammably outputs tree to w. This function requires node generated by NewRoot function.

func Verify

func Verify(r io.Reader, options ...Option) error

Verify verifies directories.

func VerifyProgrammably

func VerifyProgrammably(root *Node, options ...Option) error

VerifyProgrammably verifies directory. This function requires node generated by NewRoot function.

func Walk

func Walk(r io.Reader, callback func(*WalkerNode) error, options ...Option) error

Walk executes user-defined function while traversing tree structure recursively.

func WalkProgrammably

func WalkProgrammably(root *Node, callback func(*WalkerNode) error, options ...Option) error

WalkProgrammably executes user-defined function while traversing tree structure recursively. This function requires node generated by NewRoot function.

Types

type Node

type Node struct {
	// contains filtered or unexported fields
}

Node is main struct for gtree.

func NewRoot

func NewRoot(text string) *Node

NewRoot creates a starting node for building tree.

func (*Node) Add

func (parent *Node) Add(text string) *Node

Add adds a node and returns an instance of it. If a node with the same text already exists in the same hierarchy of the tree, that node will be returned.

type Option

type Option func(*config)

Option is functional options pattern

func WithBranchFormatIntermedialNode

func WithBranchFormatIntermedialNode(directly, indirectly string) Option

WithBranchFormatIntermedialNode returns function for branch format.

func WithBranchFormatLastNode

func WithBranchFormatLastNode(directly, indirectly string) Option

WithBranchFormatLastNode returns function for branch format.

func WithDryRun

func WithDryRun() Option

WithDryRun returns function for dry run. Detects node that is invalid for directory generation.

func WithEncodeJSON

func WithEncodeJSON() Option

WithEncodeJSON returns function for output json format.

func WithEncodeTOML

func WithEncodeTOML() Option

WithEncodeTOML returns function for output toml format.

func WithEncodeYAML

func WithEncodeYAML() Option

WithEncodeYAML returns function for output yaml format.

func WithFileExtensions

func WithFileExtensions(extensions []string) Option

WithFileExtensions returns function for creating as a file instead of a directory.

func WithMassive

func WithMassive(ctx context.Context) Option

WithMassive returns function for large amount roots.

func WithStrictVerify

func WithStrictVerify() Option

WithStrictVerify returns function for verifing directory strictly.

func WithTargetDir

func WithTargetDir(dir string) Option

WithTargetDir returns function for specifying directory. Default is current directory.

type WalkerNode

type WalkerNode struct {
	// contains filtered or unexported fields
}

WalkerNode is used in user-defined function that can be executed with Walk/WalkProgrammably function.

func (*WalkerNode) Branch

func (wn *WalkerNode) Branch() string

Branch returns branch of node in completed tree structure.

func (*WalkerNode) HasChild

func (wn *WalkerNode) HasChild() bool

HasChild returns whether the node in completed tree structure has child nodes.

func (*WalkerNode) Level

func (wn *WalkerNode) Level() uint

Level returns level of node in completed tree structure.

func (*WalkerNode) Name

func (wn *WalkerNode) Name() string

Name returns name of node in completed tree structure.

func (*WalkerNode) Path

func (wn *WalkerNode) Path() string

Path returns path of node in completed tree structure. Path is the path from the root node to this node. The separator is / in any OS execution environment.

func (*WalkerNode) Row

func (wn *WalkerNode) Row() string

Row returns row of node in completed tree structure.