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# Description Add a `command_not_found` function to `$env.config.hooks`. If this function outputs a string, then it's included in the `help`. An example hook on *Arch Linux*, to find packages that contain the binary, looks like: ```nushell let-env config = { # ... hooks: { command_not_found: { |cmd_name| ( try { let pkgs = (pkgfile --binaries --verbose $cmd_name) ( $"(ansi $env.config.color_config.shape_external)($cmd_name)(ansi reset) " + $"may be found in the following packages:\n($pkgs)" ) } catch { null } ) } # ... ``` # User-Facing Changes - Add a `command_not_found` function to `$env.config.hooks`. # Tests + Formatting Don't forget to add tests that cover your changes. Make sure you've run and fixed any issues with these commands: - `cargo fmt --all -- --check` to check standard code formatting (`cargo fmt --all` applies these changes) - `cargo clippy --workspace -- -D warnings -D clippy::unwrap_used -A clippy::needless_collect` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass # After Submitting If your PR had any user-facing changes, update [the documentation](https://github.com/nushell/nushell.github.io) after the PR is merged, if necessary. This will help us keep the docs up to date. |
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nu-protocol
The nu-protocol crate holds the definitions of structs/traits that are used throughout Nushell. This gives us one way to expose them to many other crates, as well as make these definitions available to each other, without causing mutually recursive dependencies.