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# Description This PR closes #14137 and allows the display hook to be set on byte streams. So, with a hook like this below. ```nushell display_output: { metadata access {|meta| match $meta.content_type? { "application/x-nuscript" | "application/x-nuon" | "text/x-nushell" => { nu-highlight }, "application/json" => { ^bat --language=json --color=always --style=plain --paging=never }, _ => {}, } } | table } ``` You could type `open toolkit.nu` and the text of toolkit.nu would be highlighted by nu-highlight. This PR also changes the way content-type is assigned with `open`. Previously it would only assign it if `--raw` was specified. Lastly, it changes the `is_external()` function to only say `ByteStreamSource::Child`'s are external instead of both Child and `ByteStreamSource::File`. Again, this was to allow the hook to function properly. I'm not sure what negative ramifications changing `is_external()` could have, but there may be some? # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> # 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` to check that you're using the standard code style - `cargo test --workspace` to check that all tests pass (on Windows make sure to [enable developer mode](https://learn.microsoft.com/en-us/windows/apps/get-started/developer-mode-features-and-debugging)) - `cargo run -- -c "use toolkit.nu; toolkit test stdlib"` to run the tests for the standard library > **Note** > from `nushell` you can also use the `toolkit` as follows > ```bash > use toolkit.nu # or use an `env_change` hook to activate it automatically > toolkit check pr > ``` --> # 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.