#arguments-parser #parser #cli-argument-parser

no-std clap_builder

A simple to use, efficient, and full-featured Command Line Argument Parser

96 stable releases

4.5.53 Nov 19, 2025
4.5.51 Oct 29, 2025
4.5.42 Jul 30, 2025
4.5.34 Mar 27, 2025
4.2.1 Mar 29, 2023

#744 in Command-line interface

Download history 4284812/week @ 2025-09-01 4495807/week @ 2025-09-08 4400208/week @ 2025-09-15 4652746/week @ 2025-09-22 4692121/week @ 2025-09-29 4688445/week @ 2025-10-06 4866567/week @ 2025-10-13 5140078/week @ 2025-10-20 5571772/week @ 2025-10-27 5793813/week @ 2025-11-03 5504763/week @ 2025-11-10 5986927/week @ 2025-11-17 4679624/week @ 2025-11-24 5725496/week @ 2025-12-01 6013627/week @ 2025-12-08 1021633/week @ 2025-12-15

17,937,409 downloads per month
Used in 29,466 crates (26 directly)

MIT/Apache

1MB
16K SLoC

clap_builder

Builder implementation for clap.

docs.rs

License

Licensed under either of

at your option.

Contribution

Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual-licensed as above, without any additional terms or conditions.

See CONTRIBUTING for more details.

Dependencies

~0–13MB
~116K SLoC