nushell/crates/nu-plugin-protocol/README.md

# nu-plugin-protocol

This crate provides serde-compatible types for implementing the [Nushell plugin protocol](https://www.nushell.sh/contributor-book/plugin_protocol_reference.html). It is primarily used by the `nu-plugin` family of crates, but can also be used separately as well.

The specifics of I/O and serialization are not included in this crate. Use `serde_json` and/or `rmp-serde` (with the `named` serialization) to turn the types in this crate into data in the wire format.
Split the plugin crate (#12563) # Description This breaks `nu-plugin` up into four crates: - `nu-plugin-protocol`: just the type definitions for the protocol, no I/O. If someone wanted to wire up something more bare metal, maybe for async I/O, they could use this. - `nu-plugin-core`: the shared stuff between engine/plugin. Less stable interface. - `nu-plugin-engine`: everything required for the engine to talk to plugins. Less stable interface. - `nu-plugin`: everything required for the plugin to talk to the engine, what plugin developers use. Should be the most stable interface. No changes are made to the interface exposed by `nu-plugin` - it should all still be there. Re-exports from `nu-plugin-protocol` or `nu-plugin-core` are used as required. Plugins shouldn't ever have to use those crates directly. This should be somewhat faster to compile as `nu-plugin-engine` and `nu-plugin` can compile in parallel, and the engine doesn't need `nu-plugin` and plugins don't need `nu-plugin-engine` (except for test support), so that should reduce what needs to be compiled too. The only significant change here other than splitting stuff up was to break the `source` out of `PluginCustomValue` and create a new `PluginCustomValueWithSource` type that contains that instead. One bonus of that is we get rid of the option and it's now more type-safe, but it also means that the logic for that stuff (actually running the plugin for custom value ops) can live entirely within the `nu-plugin-engine` crate. # User-Facing Changes - New crates. - Added `local-socket` feature for `nu` to try to make it possible to compile without that support if needed. # Tests + Formatting - :green_circle: `toolkit fmt` - :green_circle: `toolkit clippy` - :green_circle: `toolkit test` - :green_circle: `toolkit test stdlib` 2024-04-27 17:08:12 +00:00			`# nu-plugin-protocol`

			This crate provides serde-compatible types for implementing the [Nushell plugin protocol](https://www.nushell.sh/contributor-book/plugin_protocol_reference.html). It is primarily used by the `nu-plugin` family of crates, but can also be used separately as well.

			The specifics of I/O and serialization are not included in this crate. Use `serde_json` and/or `rmp-serde` (with the `named` serialization) to turn the types in this crate into data in the wire format.