efe25e3f58
# Description This makes `LabeledError` much more capable of representing close to everything a `miette::Diagnostic` can, including `ShellError`, and allows plugins to generate multiple error spans, codes, help, etc. `LabeledError` is now embeddable within `ShellError` as a transparent variant. This could also be used to improve `error make` and `try/catch` to reflect `LabeledError` exactly in the future. Also cleaned up some errors in existing plugins. # User-Facing Changes Breaking change for plugins. Nicer errors for users.
81 lines
2.6 KiB
Rust
81 lines
2.6 KiB
Rust
#![allow(clippy::needless_doctest_main)]
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//! # Nu Plugin: Plugin library for Nushell
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//!
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//! This crate contains the interface necessary to build Nushell plugins in Rust.
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//! Additionally, it contains public, but undocumented, items used by Nushell itself
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//! to interface with Nushell plugins. This documentation focuses on the interface
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//! needed to write an independent plugin.
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//!
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//! Nushell plugins are stand-alone applications that communicate with Nushell
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//! over stdin and stdout using a standardizes serialization framework to exchange
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//! the typed data that Nushell commands utilize natively.
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//!
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//! A typical plugin application will define a struct that implements the [Plugin]
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//! trait and then, in it's main method, pass that [Plugin] to the [serve_plugin]
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//! function, which will handle all of the input and output serialization when
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//! invoked by Nushell.
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//!
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//! ```rust,no_run
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//! use nu_plugin::{EvaluatedCall, MsgPackSerializer, serve_plugin};
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//! use nu_plugin::{Plugin, PluginCommand, SimplePluginCommand, EngineInterface};
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//! use nu_protocol::{PluginSignature, LabeledError, Value};
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//!
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//! struct MyPlugin;
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//! struct MyCommand;
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//!
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//! impl Plugin for MyPlugin {
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//! fn commands(&self) -> Vec<Box<dyn PluginCommand<Plugin = Self>>> {
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//! vec![Box::new(MyCommand)]
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//! }
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//! }
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//!
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//! impl SimplePluginCommand for MyCommand {
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//! type Plugin = MyPlugin;
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//!
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//! fn signature(&self) -> PluginSignature {
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//! todo!();
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//! }
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//!
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//! fn run(
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//! &self,
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//! plugin: &MyPlugin,
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//! engine: &EngineInterface,
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//! call: &EvaluatedCall,
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//! input: &Value
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//! ) -> Result<Value, LabeledError> {
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//! todo!();
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//! }
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//! }
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//!
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//! fn main() {
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//! serve_plugin(&MyPlugin{}, MsgPackSerializer)
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//! }
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//! ```
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//!
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//! Nushell's source tree contains a
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//! [Plugin Example](https://github.com/nushell/nushell/tree/main/crates/nu_plugin_example)
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//! that demonstrates the full range of plugin capabilities.
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mod plugin;
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mod protocol;
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mod sequence;
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mod serializers;
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mod util;
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pub use plugin::{
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serve_plugin, EngineInterface, Plugin, PluginCommand, PluginEncoder, SimplePluginCommand,
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};
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pub use protocol::EvaluatedCall;
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pub use serializers::{json::JsonSerializer, msgpack::MsgPackSerializer};
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// Used by other nu crates.
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#[doc(hidden)]
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pub use plugin::{get_signature, PersistentPlugin, PluginDeclaration};
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#[doc(hidden)]
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pub use serializers::EncodingType;
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// Used by external benchmarks.
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#[doc(hidden)]
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pub use plugin::Encoder;
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#[doc(hidden)]
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pub use protocol::{PluginCallResponse, PluginOutput};
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