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• Development is now continuing on Codeberg, with the GitHub repository becoming a mirror. Issues & pull requests on GitHub will be ignored from now on.

Lumesh - Light-speed Shell and Scripting Language

Write like js, work like Bash, run like light

Lumesh is a modern shell and scripting language, completely rewritten from Dune, designed for high performance and user-friendly experience.

⚑ Why Choose Lumesh?

Performance Comparison

⚑ Core Features

⚡ Intuitive Syntax Design

# Syntax like modern programming languages
let user = {name: "Alice", age: 25}
let numbers = 1..10 | list.filter(x -> x > 5)
let [a, b] = [1, 2]

⚡ Chained Calls

Supports method chaining similar to object-oriented languages:

"hello world".split(' ').join(',')
data | .filter(x -> x > 0)

⚡ Powerful Error Handling

More intelligent error tips, error capture and recovery deeling than traditional shells.

command ?.        # Ignore errors
command ?: e      # Error capture or default value
command ?+        # Print to standard output
command ??        # Print to error output
command ?>        # Override print (data channel)
command ?!        # Terminate on error (terminate pipeline)

⚡ Diverse Pipeline Operations

data | process           # Standard pipeline, supports structured data
data |_ positional       # Positional pipeline
data |> loop_deel        # Loop pipeline
data |^ interactive      # PTY pipeline

Structured pipelines:

ls -l | .to_table() | where(size > 5K)
Fs.ls -l | where(size > 5K) | select(name,size,modified)
ls -1 |> cp -r _ /tmp/

⚡ Rich Built-in Modules

• Collection Operations: List.reduce, List.map
• File System: Fs.ls, Fs.read, Fs.write
• String Processing: String.split, String.join, regex module, formatting module
• Time Operations: Time.now, Time.format
• Data Conversion: Into, Parse
• Mathematical Calculations: Complete math function library
• Logging: Log module
• UI Operations: ui.pick, ui.confirm

⚡ Function Decorators

Supports function decorator syntax:

@decorator_name
@decorator_with_args(param1, param2)
fn my_function() { ... }

⚡ Module import

Supports module import syntax:

use moduleA as ma

AI Integration Support

Built-in local AI assistant, supports command completion and smart suggestions.

⚑ Use Cases

☘ Interactive Shell

Replace traditional shells, providing a modern command-line experience:

# Start interactive shell
lume

☘ Script Automation

#!/usr/bin/env lumesh

# File processing script
let files = Fs.ls("/data") | where(size > 1MB)
files | List.map(f -> Fs.cp(f, './backup'))

☘ System Management

# System monitoring and management
ps -u 1000  u | Into.table() | pprint

⚑ Quick Start

Installation Methods

Method 1: Download Precompiled Version

• release-page 1
• release-page 2

Method 2: Compile from Source

git clone 'https://codeberg.com/santo/lumesh.git'
cd lumesh
cargo build --release

Experience Immediately

• lume: Complete interactive shell, supports REPL, auto-completion, syntax highlighting
• lumesh: Lightweight script executor, quick startup, minimal dependencies

# Start interactive shell
lume

# Or execute script
lumesh script.lm

Benchmark Testing

Due to fish being unable to complete one million tasks, we recorded its half-task time.

⚑ Learning Resources

• 中文 Wiki

• Wiki English

• DeepWiki

• Syntax Manual [https://lumesh.codeberg.page/en/syntax]

• Built-in Function Library [https://lumesh.codeberg.page/en/libs/index]

• Bash Comparison [https://lumesh.codeberg.page/rv/en.html]

• Hotkeys [https://lumesh.codeberg.page/en/keys]

⚑ Version History

Current version 0.6.3, continuously updated:

• Decorator support
• IFS mode control
• Performance optimization Completely rewritten since version 0.3.0, focusing on efficiency improvements and syntax extension flexibility.