| [](https://github.com/harryfei/which-rs/actions/workflows/rust.yml) |
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| # which |
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| A Rust equivalent of Unix command "which". Locate installed executable in cross platforms. |
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| ## Support platforms |
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| * Linux |
| * Windows |
| * macOS |
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| ## Examples |
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| 1) To find which rustc executable binary is using. |
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| ``` rust |
| use which::which; |
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| let result = which("rustc").unwrap(); |
| assert_eq!(result, PathBuf::from("/usr/bin/rustc")); |
| ``` |
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| 2. After enabling the `regex` feature, find all cargo subcommand executables on the path: |
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| ``` rust |
| use which::which_re; |
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| which_re(Regex::new("^cargo-.*").unwrap()).unwrap() |
| .for_each(|pth| println!("{}", pth.to_string_lossy())); |
| ``` |
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| ## Documentation |
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| The documentation is [available online](https://docs.rs/which/). |
