nushell/crates/nu-plugin/Cargo.toml

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[package]
authors = ["The Nushell Project Developers"]
description = "Functionality for building Nushell plugins"
repository = "https://github.com/nushell/nushell/tree/main/crates/nu-plugin"
edition = "2021"
license = "MIT"
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name = "nu-plugin"
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version = "0.92.2"
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[lib]
bench = false
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[dependencies]
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nu-engine = { path = "../nu-engine", version = "0.92.2" }
nu-protocol = { path = "../nu-protocol", version = "0.92.2" }
bincode = "1.3"
rmp-serde = "1.1"
serde = { workspace = true }
serde_json = { workspace = true }
log = "0.4"
miette = { workspace = true }
semver = "1.0"
typetag = "0.2"
Add test support crate for plugin developers (#12259) # Description Adds a `nu-plugin-test-support` crate with an interface that supports testing plugins. Unlike in reality, these plugins run in the same process on separate threads. This will allow testing aspects of the plugin internal state and handling serialized plugin custom values easily. We still serialize their custom values and all of the engine to plugin logic is still in play, so from a logical perspective this should still expose any bugs that would have been caused by that. The only difference is that it doesn't run in a different process, and doesn't try to serialize everything to the final wire format for stdin/stdout. TODO still: - [x] Clean up warnings about private types exposed in trait definition - [x] Automatically deserialize plugin custom values in the result so they can be inspected - [x] Automatic plugin examples test function - [x] Write a bit more documentation - [x] More tests - [x] Add MIT License file to new crate # User-Facing Changes Plugin developers get a nice way to test their plugins. # Tests + Formatting Run the tests with `cargo test -p nu-plugin-test-support -- --show-output` to see some examples of what the failing test output for examples can look like. I used the `difference` crate (MIT licensed) to make it look nice. - :green_circle: `toolkit fmt` - :green_circle: `toolkit clippy` - :green_circle: `toolkit test` - :green_circle: `toolkit test stdlib` # After Submitting - [ ] Add a section to the book about testing - [ ] Test some of the example plugins this way - [ ] Add example tests to nu_plugin_template so plugin developers have something to start with
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thiserror = "1.0"
Keep plugins persistently running in the background (#12064) # Description This PR uses the new plugin protocol to intelligently keep plugin processes running in the background for further plugin calls. Running plugins can be seen by running the new `plugin list` command, and stopped by running the new `plugin stop` command. This is an enhancement for the performance of plugins, as starting new plugin processes has overhead, especially for plugins in languages that take a significant amount of time on startup. It also enables plugins that have persistent state between commands, making the migration of features like dataframes and `stor` to plugins possible. Plugins are automatically stopped by the new plugin garbage collector, configurable with `$env.config.plugin_gc`: ```nushell $env.config.plugin_gc = { # Configuration for plugin garbage collection default: { enabled: true # true to enable stopping of inactive plugins stop_after: 10sec # how long to wait after a plugin is inactive to stop it } plugins: { # alternate configuration for specific plugins, by name, for example: # # gstat: { # enabled: false # } } } ``` If garbage collection is enabled, plugins will be stopped after `stop_after` passes after they were last active. Plugins are counted as inactive if they have no running plugin calls. Reading the stream from the response of a plugin call is still considered to be activity, but if a plugin holds on to a stream but the call ends without an active streaming response, it is not counted as active even if it is reading it. Plugins can explicitly disable the GC as appropriate with `engine.set_gc_disabled(true)`. The `version` command now lists plugin names rather than plugin commands. The list of plugin commands is accessible via `plugin list`. Recommend doing this together with #12029, because it will likely force plugin developers to do the right thing with mutability and lead to less unexpected behavior when running plugins nested / in parallel. # User-Facing Changes - new command: `plugin list` - new command: `plugin stop` - changed command: `version` (now lists plugin names, rather than commands) - new config: `$env.config.plugin_gc` - Plugins will keep running and be reused, at least for the configured GC period - Plugins that used mutable state in weird ways like `inc` did might misbehave until fixed - Plugins can disable GC if they need to - Had to change plugin signature to accept `&EngineInterface` so that the GC disable feature works. #12029 does this anyway, and I'm expecting (resolvable) conflicts with that # Tests + Formatting - :green_circle: `toolkit fmt` - :green_circle: `toolkit clippy` - :green_circle: `toolkit test` - :green_circle: `toolkit test stdlib` Because there is some specific OS behavior required for plugins to not respond to Ctrl-C directly, I've developed against and tested on both Linux and Windows to ensure that works properly. # After Submitting I think this probably needs to be in the book somewhere
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[target.'cfg(target_os = "windows")'.dependencies]
windows = { workspace = true, features = [
Keep plugins persistently running in the background (#12064) # Description This PR uses the new plugin protocol to intelligently keep plugin processes running in the background for further plugin calls. Running plugins can be seen by running the new `plugin list` command, and stopped by running the new `plugin stop` command. This is an enhancement for the performance of plugins, as starting new plugin processes has overhead, especially for plugins in languages that take a significant amount of time on startup. It also enables plugins that have persistent state between commands, making the migration of features like dataframes and `stor` to plugins possible. Plugins are automatically stopped by the new plugin garbage collector, configurable with `$env.config.plugin_gc`: ```nushell $env.config.plugin_gc = { # Configuration for plugin garbage collection default: { enabled: true # true to enable stopping of inactive plugins stop_after: 10sec # how long to wait after a plugin is inactive to stop it } plugins: { # alternate configuration for specific plugins, by name, for example: # # gstat: { # enabled: false # } } } ``` If garbage collection is enabled, plugins will be stopped after `stop_after` passes after they were last active. Plugins are counted as inactive if they have no running plugin calls. Reading the stream from the response of a plugin call is still considered to be activity, but if a plugin holds on to a stream but the call ends without an active streaming response, it is not counted as active even if it is reading it. Plugins can explicitly disable the GC as appropriate with `engine.set_gc_disabled(true)`. The `version` command now lists plugin names rather than plugin commands. The list of plugin commands is accessible via `plugin list`. Recommend doing this together with #12029, because it will likely force plugin developers to do the right thing with mutability and lead to less unexpected behavior when running plugins nested / in parallel. # User-Facing Changes - new command: `plugin list` - new command: `plugin stop` - changed command: `version` (now lists plugin names, rather than commands) - new config: `$env.config.plugin_gc` - Plugins will keep running and be reused, at least for the configured GC period - Plugins that used mutable state in weird ways like `inc` did might misbehave until fixed - Plugins can disable GC if they need to - Had to change plugin signature to accept `&EngineInterface` so that the GC disable feature works. #12029 does this anyway, and I'm expecting (resolvable) conflicts with that # Tests + Formatting - :green_circle: `toolkit fmt` - :green_circle: `toolkit clippy` - :green_circle: `toolkit test` - :green_circle: `toolkit test stdlib` Because there is some specific OS behavior required for plugins to not respond to Ctrl-C directly, I've developed against and tested on both Linux and Windows to ensure that works properly. # After Submitting I think this probably needs to be in the book somewhere
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# For setting process creation flags
"Win32_System_Threading",
] }