clap
Fast. Configurable. Argument Parsing for Rust
About
clap or Command Line Argument Parser
Is a simple-to-use, efficient, and fully-configurable library for parsing command line arguments.
clap supports advanced features like argument relationships, subcommands, and much, much more.
A Quick Taste
The following Rust code is all it takes to get started:
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extern crate clap; use clap::App; fn main() { App::new("myapp") .version("1.0") .about("Does great things!") .author("Kevin K.") .get_matches(); } |
If the user runs $ myapp --help the following would be printed
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$ myapp --help myapp 1.0 Kevin K. Does great things! USAGE: myapp [FLAGS] FLAGS: -h, --help Prints this message -V, --version Prints version information |
Features
Just a few of the many, many features
Fast
clap aims to be extremely fast and efficient. Arguments will be parsed without wasting CPU cycles or...
Configurable
clap is fully configurable, yet still has common defaults for those applications that simply want be...
Standards Based
clap supports all standard argument types, flags/switches, options, free/positional arguments, and e...
Effortless Auto Completion
clap can generate bash, fish, zsh and even PowerShell completion files at compile time! These can th...
Spend time building your application
Let us worry about the arguments
Why Choose clap
A few more features
Automatic Help
clap generates your help message and usage strings for you automatically from the list of valid argu...User Suggestions
If the end user has a typo, clap will gently suggest a correction based on the current context. I...Friendly Errors
clap generates friendly, and informative error messages. These messages kindly inform the end user o...Intuitive
clap is extremely easy and intuitive to use. In fact, it’s so intuitive that all you may need isRelationships
One can define argument relationships easily, and intuitively. This includes everything from require...YAML Support
You can define your list of valid arguments in a YAML file, keeping your main.rs clean and tidy.OUR FACTS
Some Numbers that Speak
99
crates.io downloads
99
github stars
99
Dependant Repositories
99
amazing contributors
Sponsors
See more about our incredible sponsors by clicking 'Sponsorship' above!
Latest blogs
Check out the latest posts from our blog
Tuning your Weight Loss vs Performance
January 15, 2018
This is a follow up from my previous post. In that post, I conjectured that turning on LTO (Link Time Optimization) and increasing the optimization levels would...
New Years Weight Loss
January 9, 2018
Preface: This post is somewhat hard to write, because it contains code that I'm not proud of, it's messy...bloated...it's real. I'm exposing something, in a pro... Contact Us
We would love to hear from you
Contact us at any of the given locations below, also on our Github or Gitter pages above!
- kbknapp@gmail.com