mooncakes.io

recursively builds and displays directory structures in ASCII tree format.

filesystem

file-tree

#文件树库 / File Tree Library

一个 MoonBit 文件树库，用于递归构建和以 ASCII 树形格式显示目录结构。

#主要功能 / Main Features

递归遍历目录结构 / Recursively traverse directory structures
生成美观的 ASCII 树形图 / Generate beautiful ASCII tree diagrams
支持字符串输出和直接打印 / Support both string output and direct printing
支持跨平台路径格式 / Support cross-platform path formats

#基本用法 / Basic Usage

///|
fn example() -> Unit raise @fs.IOError {
  // 构建文件树 / Build file tree
  let tree = build_tree(".")

  // 直接打印 / Print directly
  print_tree(tree)

  // 或获取字符串 / Or get string representation
  let tree_str = tree_to_string(tree)
  println(tree_str)
}

#示例输出 / Example Output

./
├── src/
│   ├── main.mbt
│   └── utils.mbt
├── README.md
└── README.mbt.md

#重要说明 / Important Notes

#路径解析机制 / Path Resolution Mechanism

相对路径是相对于程序运行时的工作目录（CWD），而不是源代码文件所在的目录。

Relative paths are resolved relative to the Current Working Directory (CWD) where the program runs, NOT relative to the source code file location.

这是因为底层实现：

build_tree() 调用 @fs.is_dir() 和 @fs.read_dir()
这些函数通过 FFI 调用 C 标准库函数（stat(), opendir() 等）
路径解析由操作系统内核完成，遵循 POSIX 标准
相对路径基准点是进程的当前工作目录，由 shell 在启动程序时设置

This is because of the underlying implementation:

build_tree() calls @fs.is_dir() and @fs.read_dir()
These functions use FFI to call C standard library functions (stat(), opendir(), etc.)
Path resolution is handled by the OS kernel, following POSIX standards
The base directory for relative paths is the process's current working directory, set by the shell when the program starts

示例 / Example:

如果从 /home/user/project/ 目录运行程序： If running the program from /home/user/project/:

build_tree(".")      → 遍历 /home/user/project/
                       Traverses /home/user/project/

build_tree("./src")  → 遍历 /home/user/project/src/
                       Traverses /home/user/project/src/

build_tree("../")    → 遍历 /home/user/
                       Traverses /home/user/

建议 / Recommendations:

在项目根目录运行测试和程序 / Run tests and programs from the project root directory
使用相对路径时要注意当前工作目录 / Be aware of the current working directory when using relative paths
如需使用绝对路径可直接传入完整路径 / Use absolute paths if you need path independence

#
FileNode

source

pub enum FileNode {
  File(String)
  Directory(String, Array[FileNode])
}

File tree node representation 文件树节点表示

This enum represents either a file or a directory in the file system tree. 此枚举表示文件系统树中的文件或目录。

Variants

File(String): Represents a file with its name
Directory(String, Array[FileNode]): Represents a directory with its name and child nodes
File(String): 表示具有名称的文件
Directory(String, Array[FileNode]): 表示具有名称和子节点列表的目录

impl Show for FileNode

fn output(self : FileNode, logger : Logger) -> Unit

source

Show implementation for FileNode FileNode 的 Show 实现

Provides a string representation of FileNode for debugging and display. 为 FileNode 提供字符串表示，用于调试和显示。

#
build_tree

source

fn build_tree(path : String) -> FileNode raise @moonbitlang/x/fs.IOError
IOError

Recursively build file tree from path 从路径递归构建文件树

Parameters

参数

path: The path string to traverse
path: 要遍历的路径字符串

Returns

返回值

FileNode: The file tree node
FileNode: 文件树节点

Errors

错误

Raises @fs.IOError if file system operations fail
如果文件系统操作失败则抛出 @fs.IOError

#
print_tree

source

fn print_tree(node : FileNode) -> Unit

Print the complete ASCII file tree 打印完整的 ASCII 文件树

Parameters

参数

node: The root node of the file tree
node: 文件树的根节点

Examples

示例

let tree = build_tree(".")
print_tree(tree)
// Output:
// .
// ├── src/
// │   └── main.mbt
// └── README.md

#
tree_to_string

source

fn tree_to_string(node : FileNode) -> String

Convert the complete file tree to a multi-line string 将完整的文件树转换为多行字符串

Parameters

参数

node: The root node of the file tree
node: 文件树的根节点

Returns

返回值

String: A multi-line string representation of the file tree
String: 文件树的多行字符串表示

Examples

示例

let tree = build_tree(".")
let tree_str = tree_to_string(tree)
println(tree_str)
// Output:
// .
// ├── src/
// │   └── main.mbt
// └── README.md

Source Files

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files_tree

#文件树库 / File Tree Library

#主要功能 / Main Features

#基本用法 / Basic Usage

#示例输出 / Example Output

#重要说明 / Important Notes

#路径解析机制 / Path Resolution Mechanism

#FileNode

Variants

#build_tree

Parameters

参数

Returns

返回值

Errors

错误

#print_tree

Parameters

参数

Examples

示例

#tree_to_string

Parameters

参数

Returns

返回值

Examples

示例

Source Files

#
FileNode

#
build_tree

#
print_tree

#
tree_to_string