What is this?
clap is a full-featured, fast command-line argument parser for Rust, letting you build CLIs with flags, options, positional arguments, and subcommands, plus auto-generated help and usage text.
clap is a full-featured, fast command-line argument parser for Rust, letting you build CLIs with flags, options, positional arguments, and subcommands, plus auto-generated help and usage text.Is this a library I add to my code, or a standalone app?It is a Rust library (crate): you pull it in as a dependency and build your own command-line parser with it, either declaratively with derive macros on a struct or procedurally with a builder API.
It is a Rust library (crate): you pull it in as a dependency and build your own command-line parser with it, either declaratively with derive macros on a struct or procedurally with a builder API.How do I add it to my Rust project?Add clap as a dependency in Cargo.toml (for example with cargo add clap), then define your CLI either by deriving from a struct or by building it with the procedural builder API; full usage details and examples are linked from the README.
Add clap as a dependency in Cargo.toml (for example with cargo add clap), then define your CLI either by deriving from a struct or by building it with the procedural builder API; full usage details and examples are linked from the README.Does clap handle subcommands and positional arguments out of the box?Yes, the project's own topics list argument-parsing, positional-arguments, parsed-arguments and subcommands as core capabilities alongside the main parser.
Yes, the project's own topics list argument-parsing, positional-arguments, parsed-arguments and subcommands as core capabilities alongside the main parser.Where do I find full docs and usage examples?The README points to docs.rs for the API reference and to an examples section in the repository for sample CLI implementations.
The README points to docs.rs for the API reference and to an examples section in the repository for sample CLI implementations.Should I use the derive macro or the builder API?Both are first-class options: derive lets you define a CLI declaratively from a struct's fields, while the builder API lets you construct the same parser procedurally in code; pick whichever fits your style.
Both are first-class options: derive lets you define a CLI declaratively from a struct's fields, while the builder API lets you construct the same parser procedurally in code; pick whichever fits your style.Which topics is it in?parser, cli-tool, command-line, rust, command-line-tool, apache-2.0, library, cli, cross-platform, developer-tools, mit
parser, cli-tool, command-line, rust, command-line-tool, apache-2.0, library, cli, cross-platform, developer-tools, mit