mirror of
https://github.com/nushell/nushell.git
synced 2024-11-24 17:34:00 +01:00
Allow plugins to set environment variables in their caller's scope (#12204)
# Description Adds the `AddEnvVar` plugin call, which allows plugins to set environment variables in the caller's scope. This is the first engine call that mutates the caller's stack, and opens the door to more operations like this if needed. This also comes with an extra benefit: in doing this, I needed to refactor how context was handled, and I was able to avoid cloning `EngineInterface` / `Stack` / `Call` in most cases that plugin calls are used. They now only need to be cloned if the plugin call returns a stream. The performance increase is welcome (5.5x faster on `inc`!): ```nushell # Before > timeit { 1..100 | each { |i| $"2.0.($i)" | inc -p } } 405ms 941µs 952ns # After > timeit { 1..100 | each { |i| $"2.0.($i)" | inc -p } } 73ms 68µs 749ns ``` # User-Facing Changes - New engine call: `add_env_var()` - Performance enhancement for plugin calls # Tests + Formatting - 🟢 `toolkit fmt` - 🟢 `toolkit clippy` - 🟢 `toolkit test` - 🟢 `toolkit test stdlib` # After Submitting - [x] Document env manipulation in plugins guide - [x] Document `AddEnvVar` in plugin protocol
This commit is contained in:
parent
687fbc49c8
commit
f6faf73e02
@ -59,6 +59,7 @@ 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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@ -1,4 +1,5 @@
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use std::{
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borrow::Cow,
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collections::HashMap,
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sync::{atomic::AtomicBool, Arc},
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};
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@ -10,6 +11,8 @@ use nu_protocol::{
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Config, IntoSpanned, IoStream, PipelineData, PluginIdentity, ShellError, Span, Spanned, Value,
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};
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use crate::util::MutableCow;
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/// Object safe trait for abstracting operations required of the plugin context.
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pub(crate) trait PluginExecutionContext: Send + Sync {
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/// The [Span] for the command execution (`call.head`)
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@ -26,8 +29,10 @@ pub(crate) trait PluginExecutionContext: Send + Sync {
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fn get_env_var(&self, name: &str) -> Result<Option<Value>, ShellError>;
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/// Get all environment variables
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fn get_env_vars(&self) -> Result<HashMap<String, Value>, ShellError>;
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// Get current working directory
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/// Get current working directory
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fn get_current_dir(&self) -> Result<Spanned<String>, ShellError>;
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/// Set an environment variable
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fn add_env_var(&mut self, name: String, value: Value) -> Result<(), ShellError>;
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/// Evaluate a closure passed to the plugin
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fn eval_closure(
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&self,
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@ -37,33 +42,35 @@ pub(crate) trait PluginExecutionContext: Send + Sync {
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redirect_stdout: bool,
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redirect_stderr: bool,
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) -> Result<PipelineData, ShellError>;
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/// Create an owned version of the context with `'static` lifetime
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fn boxed(&self) -> Box<dyn PluginExecutionContext>;
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}
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/// The execution context of a plugin command.
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pub(crate) struct PluginExecutionCommandContext {
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/// The execution context of a plugin command. Can be borrowed.
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pub(crate) struct PluginExecutionCommandContext<'a> {
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identity: Arc<PluginIdentity>,
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engine_state: EngineState,
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stack: Stack,
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call: Call,
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engine_state: Cow<'a, EngineState>,
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stack: MutableCow<'a, Stack>,
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call: Cow<'a, Call>,
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}
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impl PluginExecutionCommandContext {
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impl<'a> PluginExecutionCommandContext<'a> {
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pub fn new(
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identity: Arc<PluginIdentity>,
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engine_state: &EngineState,
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stack: &Stack,
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call: &Call,
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) -> PluginExecutionCommandContext {
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engine_state: &'a EngineState,
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stack: &'a mut Stack,
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call: &'a Call,
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) -> PluginExecutionCommandContext<'a> {
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PluginExecutionCommandContext {
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identity,
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engine_state: engine_state.clone(),
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stack: stack.clone(),
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call: call.clone(),
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engine_state: Cow::Borrowed(engine_state),
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stack: MutableCow::Borrowed(stack),
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call: Cow::Borrowed(call),
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}
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}
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}
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impl PluginExecutionContext for PluginExecutionCommandContext {
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impl<'a> PluginExecutionContext for PluginExecutionCommandContext<'a> {
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fn command_span(&self) -> Span {
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self.call.head
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}
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@ -131,6 +138,11 @@ impl PluginExecutionContext for PluginExecutionCommandContext {
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Ok(cwd.into_spanned(self.call.head))
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}
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fn add_env_var(&mut self, name: String, value: Value) -> Result<(), ShellError> {
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self.stack.add_env_var(name, value);
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Ok(())
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}
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fn eval_closure(
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&self,
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closure: Spanned<Closure>,
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@ -191,6 +203,15 @@ impl PluginExecutionContext for PluginExecutionCommandContext {
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eval_block_with_early_return(&self.engine_state, stack, block, input)
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}
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fn boxed(&self) -> Box<dyn PluginExecutionContext + 'static> {
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Box::new(PluginExecutionCommandContext {
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identity: self.identity.clone(),
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engine_state: Cow::Owned(self.engine_state.clone().into_owned()),
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stack: self.stack.owned(),
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call: Cow::Owned(self.call.clone().into_owned()),
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})
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}
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}
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/// A bogus execution context for testing that doesn't really implement anything properly
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@ -239,6 +260,12 @@ impl PluginExecutionContext for PluginExecutionBogusContext {
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})
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}
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fn add_env_var(&mut self, _name: String, _value: Value) -> Result<(), ShellError> {
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Err(ShellError::NushellFailed {
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msg: "add_env_var not implemented on bogus".into(),
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})
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}
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fn eval_closure(
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&self,
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_closure: Spanned<Closure>,
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@ -251,4 +278,8 @@ impl PluginExecutionContext for PluginExecutionBogusContext {
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msg: "eval_closure not implemented on bogus".into(),
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})
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}
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fn boxed(&self) -> Box<dyn PluginExecutionContext + 'static> {
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Box::new(PluginExecutionBogusContext)
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}
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}
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@ -108,12 +108,12 @@ impl Command for PluginDeclaration {
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})?;
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// Create the context to execute in - this supports engine calls and custom values
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let context = Arc::new(PluginExecutionCommandContext::new(
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let mut context = PluginExecutionCommandContext::new(
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self.source.identity.clone(),
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engine_state,
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stack,
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call,
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));
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);
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plugin.run(
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CallInfo {
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@ -121,7 +121,7 @@ impl Command for PluginDeclaration {
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call: evaluated_call,
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input,
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},
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context,
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&mut context,
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)
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}
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@ -458,6 +458,9 @@ impl EngineInterface {
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EngineCall::GetEnvVar(name) => (EngineCall::GetEnvVar(name), Default::default()),
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EngineCall::GetEnvVars => (EngineCall::GetEnvVars, Default::default()),
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EngineCall::GetCurrentDir => (EngineCall::GetCurrentDir, Default::default()),
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EngineCall::AddEnvVar(name, value) => {
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(EngineCall::AddEnvVar(name, value), Default::default())
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}
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};
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// Register the channel
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@ -622,6 +625,30 @@ impl EngineInterface {
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}
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}
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/// Set an environment variable in the caller's scope.
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///
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/// If called after the plugin response has already been sent (i.e. during a stream), this will
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/// only affect the environment for engine calls related to this plugin call, and will not be
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/// propagated to the environment of the caller.
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///
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/// # Example
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/// ```rust,no_run
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/// # use nu_protocol::{Value, ShellError};
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/// # use nu_plugin::EngineInterface;
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/// # fn example(engine: &EngineInterface) -> Result<(), ShellError> {
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/// engine.add_env_var("FOO", Value::test_string("bar"))
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/// # }
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/// ```
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pub fn add_env_var(&self, name: impl Into<String>, value: Value) -> Result<(), ShellError> {
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match self.engine_call(EngineCall::AddEnvVar(name.into(), value))? {
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EngineCallResponse::PipelineData(_) => Ok(()),
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EngineCallResponse::Error(err) => Err(err),
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_ => Err(ShellError::PluginFailedToDecode {
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msg: "Received unexpected response type for EngineCall::AddEnvVar".into(),
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}),
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}
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}
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/// Ask the engine to evaluate a closure. Input to the closure is passed as a stream, and the
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/// output is available as a stream.
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///
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@ -953,6 +953,20 @@ fn interface_get_env_vars() -> Result<(), ShellError> {
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Ok(())
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}
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#[test]
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fn interface_add_env_var() -> Result<(), ShellError> {
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let test = TestCase::new();
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let manager = test.engine();
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let interface = manager.interface_for_context(0);
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start_fake_plugin_call_responder(manager, 1, move |_| EngineCallResponse::empty());
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interface.add_env_var("FOO", Value::test_string("bar"))?;
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assert!(test.has_unconsumed_write());
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Ok(())
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}
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#[test]
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fn interface_eval_closure_with_stream() -> Result<(), ShellError> {
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let test = TestCase::new();
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@ -2,7 +2,7 @@
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use std::{
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collections::{btree_map, BTreeMap},
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sync::{mpsc, Arc, OnceLock},
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sync::{atomic::AtomicBool, mpsc, Arc, OnceLock},
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};
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use nu_protocol::{
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@ -44,8 +44,7 @@ enum ReceivedPluginCallMessage {
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}
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/// Context for plugin call execution
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#[derive(Clone)]
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pub(crate) struct Context(Arc<dyn PluginExecutionContext>);
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pub(crate) struct Context(Box<dyn PluginExecutionContext>);
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impl std::fmt::Debug for Context {
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fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
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@ -70,7 +69,7 @@ struct PluginInterfaceState {
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/// Sequence for generating stream ids
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stream_id_sequence: Sequence,
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/// Sender to subscribe to a plugin call response
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plugin_call_subscription_sender: mpsc::Sender<(PluginCallId, PluginCallSubscription)>,
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plugin_call_subscription_sender: mpsc::Sender<(PluginCallId, PluginCallState)>,
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/// An error that should be propagated to further plugin calls
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error: OnceLock<ShellError>,
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/// The synchronized output writer
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@ -91,14 +90,15 @@ impl std::fmt::Debug for PluginInterfaceState {
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}
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}
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/// Sent to the [`PluginInterfaceManager`] before making a plugin call to indicate interest in its
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/// response.
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/// State that the manager keeps for each plugin call during its lifetime.
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#[derive(Debug)]
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struct PluginCallSubscription {
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struct PluginCallState {
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/// The sender back to the thread that is waiting for the plugin call response
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sender: Option<mpsc::Sender<ReceivedPluginCallMessage>>,
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/// Optional context for the environment of a plugin call for servicing engine calls
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context: Option<Context>,
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/// Interrupt signal to be used for stream iterators
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ctrlc: Option<Arc<AtomicBool>>,
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/// Channel to receive context on to be used if needed
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context_rx: Option<mpsc::Receiver<Context>>,
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/// Number of streams that still need to be read from the plugin call response
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remaining_streams_to_read: i32,
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}
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@ -112,10 +112,10 @@ pub(crate) struct PluginInterfaceManager {
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stream_manager: StreamManager,
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/// Protocol version info, set after `Hello` received
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protocol_info: Option<ProtocolInfo>,
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/// Subscriptions for messages related to plugin calls
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plugin_call_subscriptions: BTreeMap<PluginCallId, PluginCallSubscription>,
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/// State related to plugin calls
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plugin_call_states: BTreeMap<PluginCallId, PluginCallState>,
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/// Receiver for plugin call subscriptions
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plugin_call_subscription_receiver: mpsc::Receiver<(PluginCallId, PluginCallSubscription)>,
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plugin_call_subscription_receiver: mpsc::Receiver<(PluginCallId, PluginCallState)>,
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/// Tracker for which plugin call streams being read belong to
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///
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/// This is necessary so we know when we can remove context for plugin calls
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@ -142,7 +142,7 @@ impl PluginInterfaceManager {
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}),
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stream_manager: StreamManager::new(),
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protocol_info: None,
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plugin_call_subscriptions: BTreeMap::new(),
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plugin_call_states: BTreeMap::new(),
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plugin_call_subscription_receiver: subscription_rx,
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plugin_call_input_streams: BTreeMap::new(),
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gc: None,
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@ -158,9 +158,9 @@ impl PluginInterfaceManager {
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/// Consume pending messages in the `plugin_call_subscription_receiver`
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fn receive_plugin_call_subscriptions(&mut self) {
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while let Ok((id, subscription)) = self.plugin_call_subscription_receiver.try_recv() {
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if let btree_map::Entry::Vacant(e) = self.plugin_call_subscriptions.entry(id) {
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e.insert(subscription);
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while let Ok((id, state)) = self.plugin_call_subscription_receiver.try_recv() {
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if let btree_map::Entry::Vacant(e) = self.plugin_call_states.entry(id) {
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e.insert(state);
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} else {
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log::warn!("Duplicate plugin call ID ignored: {id}");
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}
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@ -172,8 +172,8 @@ impl PluginInterfaceManager {
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self.plugin_call_input_streams.insert(stream_id, call_id);
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// Increment the number of streams on the subscription so context stays alive
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self.receive_plugin_call_subscriptions();
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if let Some(sub) = self.plugin_call_subscriptions.get_mut(&call_id) {
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sub.remaining_streams_to_read += 1;
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if let Some(state) = self.plugin_call_states.get_mut(&call_id) {
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state.remaining_streams_to_read += 1;
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}
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// Add a lock to the garbage collector for each stream
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if let Some(ref gc) = self.gc {
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@ -184,8 +184,7 @@ impl PluginInterfaceManager {
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/// Track the end of an incoming stream
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fn recv_stream_ended(&mut self, stream_id: StreamId) {
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if let Some(call_id) = self.plugin_call_input_streams.remove(&stream_id) {
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if let btree_map::Entry::Occupied(mut e) = self.plugin_call_subscriptions.entry(call_id)
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{
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if let btree_map::Entry::Occupied(mut e) = self.plugin_call_states.entry(call_id) {
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e.get_mut().remaining_streams_to_read -= 1;
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// Remove the subscription if there are no more streams to be read.
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if e.get().remaining_streams_to_read <= 0 {
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@ -200,14 +199,14 @@ impl PluginInterfaceManager {
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}
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}
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/// Find the context corresponding to the given plugin call id
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fn get_context(&mut self, id: PluginCallId) -> Result<Option<Context>, ShellError> {
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/// Find the ctrlc signal corresponding to the given plugin call id
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fn get_ctrlc(&mut self, id: PluginCallId) -> Result<Option<Arc<AtomicBool>>, ShellError> {
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// Make sure we're up to date
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self.receive_plugin_call_subscriptions();
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// Find the subscription and return the context
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self.plugin_call_subscriptions
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self.plugin_call_states
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.get(&id)
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.map(|sub| sub.context.clone())
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.map(|state| state.ctrlc.clone())
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.ok_or_else(|| ShellError::PluginFailedToDecode {
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msg: format!("Unknown plugin call ID: {id}"),
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})
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@ -222,7 +221,7 @@ impl PluginInterfaceManager {
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// Ensure we're caught up on the subscriptions made
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self.receive_plugin_call_subscriptions();
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if let btree_map::Entry::Occupied(mut e) = self.plugin_call_subscriptions.entry(id) {
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if let btree_map::Entry::Occupied(mut e) = self.plugin_call_states.entry(id) {
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// Remove the subscription sender, since this will be the last message.
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//
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// We can spawn a new one if we need it for engine calls.
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@ -254,11 +253,23 @@ impl PluginInterfaceManager {
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) -> Result<&mpsc::Sender<ReceivedPluginCallMessage>, ShellError> {
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let interface = self.get_interface();
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if let Some(sub) = self.plugin_call_subscriptions.get_mut(&id) {
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if sub.sender.is_none() {
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if let Some(state) = self.plugin_call_states.get_mut(&id) {
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if state.sender.is_none() {
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let (tx, rx) = mpsc::channel();
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let context = sub.context.clone();
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let context_rx =
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state
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.context_rx
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.take()
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.ok_or_else(|| ShellError::NushellFailed {
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msg: "Tried to spawn the fallback engine call handler more than once"
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.into(),
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})?;
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let handler = move || {
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// We receive on the thread so that we don't block the reader thread
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let mut context = context_rx
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.recv()
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.ok() // The plugin call won't send context if it's not required.
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.map(|c| c.0);
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for msg in rx {
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// This thread only handles engine calls.
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match msg {
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@ -266,7 +277,7 @@ impl PluginInterfaceManager {
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if let Err(err) = interface.handle_engine_call(
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engine_call_id,
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engine_call,
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&context,
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context.as_deref_mut(),
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) {
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log::warn!(
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"Error in plugin post-response engine call handler: \
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@ -286,8 +297,8 @@ impl PluginInterfaceManager {
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.name("plugin engine call handler".into())
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.spawn(handler)
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.expect("failed to spawn thread");
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sub.sender = Some(tx);
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Ok(sub.sender.as_ref().unwrap_or_else(|| unreachable!()))
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state.sender = Some(tx);
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Ok(state.sender.as_ref().unwrap_or_else(|| unreachable!()))
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} else {
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Err(ShellError::NushellFailed {
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msg: "Tried to spawn the fallback engine call handler before the plugin call \
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@ -313,7 +324,7 @@ impl PluginInterfaceManager {
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self.receive_plugin_call_subscriptions();
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// Don't remove the sender, as there could be more calls or responses
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if let Some(subscription) = self.plugin_call_subscriptions.get(&plugin_call_id) {
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if let Some(subscription) = self.plugin_call_states.get(&plugin_call_id) {
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let msg = ReceivedPluginCallMessage::EngineCall(engine_call_id, call);
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// Call if there's an error sending the engine call
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let send_error = |this: &Self| {
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@ -374,9 +385,7 @@ impl PluginInterfaceManager {
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let _ = self.stream_manager.broadcast_read_error(err.clone());
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// Error to call waiters
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self.receive_plugin_call_subscriptions();
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for subscription in
|
||||
std::mem::take(&mut self.plugin_call_subscriptions).into_values()
|
||||
{
|
||||
for subscription in std::mem::take(&mut self.plugin_call_states).into_values() {
|
||||
let _ = subscription
|
||||
.sender
|
||||
.as_ref()
|
||||
@ -460,15 +469,14 @@ impl InterfaceManager for PluginInterfaceManager {
|
||||
PluginCallResponse::PipelineData(data) => {
|
||||
// If there's an error with initializing this stream, change it to a plugin
|
||||
// error response, but send it anyway
|
||||
let exec_context = self.get_context(id)?;
|
||||
let ctrlc = exec_context.as_ref().and_then(|c| c.0.ctrlc());
|
||||
let ctrlc = self.get_ctrlc(id)?;
|
||||
|
||||
// Register the streams in the response
|
||||
for stream_id in data.stream_ids() {
|
||||
self.recv_stream_started(id, stream_id);
|
||||
}
|
||||
|
||||
match self.read_pipeline_data(data, ctrlc) {
|
||||
match self.read_pipeline_data(data, ctrlc.as_ref()) {
|
||||
Ok(data) => PluginCallResponse::PipelineData(data),
|
||||
Err(err) => PluginCallResponse::Error(err.into()),
|
||||
}
|
||||
@ -485,14 +493,14 @@ impl InterfaceManager for PluginInterfaceManager {
|
||||
}
|
||||
PluginOutput::EngineCall { context, id, call } => {
|
||||
// Handle reading the pipeline data, if any
|
||||
let exec_context = self.get_context(context)?;
|
||||
let ctrlc = exec_context.as_ref().and_then(|c| c.0.ctrlc());
|
||||
let ctrlc = self.get_ctrlc(context)?;
|
||||
let call = match call {
|
||||
EngineCall::GetConfig => Ok(EngineCall::GetConfig),
|
||||
EngineCall::GetPluginConfig => Ok(EngineCall::GetPluginConfig),
|
||||
EngineCall::GetEnvVar(name) => Ok(EngineCall::GetEnvVar(name)),
|
||||
EngineCall::GetEnvVars => Ok(EngineCall::GetEnvVars),
|
||||
EngineCall::GetCurrentDir => Ok(EngineCall::GetCurrentDir),
|
||||
EngineCall::AddEnvVar(name, value) => Ok(EngineCall::AddEnvVar(name, value)),
|
||||
EngineCall::EvalClosure {
|
||||
closure,
|
||||
mut positional,
|
||||
@ -504,14 +512,15 @@ impl InterfaceManager for PluginInterfaceManager {
|
||||
for arg in positional.iter_mut() {
|
||||
PluginCustomValue::add_source(arg, &self.state.source);
|
||||
}
|
||||
self.read_pipeline_data(input, ctrlc)
|
||||
.map(|input| EngineCall::EvalClosure {
|
||||
self.read_pipeline_data(input, ctrlc.as_ref()).map(|input| {
|
||||
EngineCall::EvalClosure {
|
||||
closure,
|
||||
positional,
|
||||
input,
|
||||
redirect_stdout,
|
||||
redirect_stderr,
|
||||
})
|
||||
}
|
||||
})
|
||||
}
|
||||
};
|
||||
match call {
|
||||
@ -622,7 +631,8 @@ impl PluginInterface {
|
||||
fn write_plugin_call(
|
||||
&self,
|
||||
call: PluginCall<PipelineData>,
|
||||
context: Option<Context>,
|
||||
ctrlc: Option<Arc<AtomicBool>>,
|
||||
context_rx: mpsc::Receiver<Context>,
|
||||
) -> Result<
|
||||
(
|
||||
PipelineDataWriter<Self>,
|
||||
@ -662,9 +672,10 @@ impl PluginInterface {
|
||||
.plugin_call_subscription_sender
|
||||
.send((
|
||||
id,
|
||||
PluginCallSubscription {
|
||||
PluginCallState {
|
||||
sender: Some(tx),
|
||||
context,
|
||||
ctrlc,
|
||||
context_rx: Some(context_rx),
|
||||
remaining_streams_to_read: 0,
|
||||
},
|
||||
))
|
||||
@ -703,19 +714,26 @@ impl PluginInterface {
|
||||
fn receive_plugin_call_response(
|
||||
&self,
|
||||
rx: mpsc::Receiver<ReceivedPluginCallMessage>,
|
||||
context: &Option<Context>,
|
||||
mut context: Option<&mut (dyn PluginExecutionContext + '_)>,
|
||||
context_tx: mpsc::Sender<Context>,
|
||||
) -> Result<PluginCallResponse<PipelineData>, ShellError> {
|
||||
// Handle message from receiver
|
||||
for msg in rx {
|
||||
match msg {
|
||||
ReceivedPluginCallMessage::Response(resp) => {
|
||||
if resp.has_stream() {
|
||||
// If the response has a stream, we need to register the context
|
||||
if let Some(context) = context {
|
||||
let _ = context_tx.send(Context(context.boxed()));
|
||||
}
|
||||
}
|
||||
return Ok(resp);
|
||||
}
|
||||
ReceivedPluginCallMessage::Error(err) => {
|
||||
return Err(err);
|
||||
}
|
||||
ReceivedPluginCallMessage::EngineCall(engine_call_id, engine_call) => {
|
||||
self.handle_engine_call(engine_call_id, engine_call, context)?;
|
||||
self.handle_engine_call(engine_call_id, engine_call, context.as_deref_mut())?;
|
||||
}
|
||||
}
|
||||
}
|
||||
@ -730,7 +748,7 @@ impl PluginInterface {
|
||||
&self,
|
||||
engine_call_id: EngineCallId,
|
||||
engine_call: EngineCall<PipelineData>,
|
||||
context: &Option<Context>,
|
||||
context: Option<&mut (dyn PluginExecutionContext + '_)>,
|
||||
) -> Result<(), ShellError> {
|
||||
let resp =
|
||||
handle_engine_call(engine_call, context).unwrap_or_else(EngineCallResponse::Error);
|
||||
@ -763,7 +781,7 @@ impl PluginInterface {
|
||||
fn plugin_call(
|
||||
&self,
|
||||
call: PluginCall<PipelineData>,
|
||||
context: &Option<Context>,
|
||||
context: Option<&mut dyn PluginExecutionContext>,
|
||||
) -> Result<PluginCallResponse<PipelineData>, ShellError> {
|
||||
// Check for an error in the state first, and return it if set.
|
||||
if let Some(error) = self.state.error.get() {
|
||||
@ -777,17 +795,24 @@ impl PluginInterface {
|
||||
gc.increment_locks(1);
|
||||
}
|
||||
|
||||
let (writer, rx) = self.write_plugin_call(call, context.clone())?;
|
||||
// Create the channel to send context on if needed
|
||||
let (context_tx, context_rx) = mpsc::channel();
|
||||
|
||||
let (writer, rx) = self.write_plugin_call(
|
||||
call,
|
||||
context.as_ref().and_then(|c| c.ctrlc().cloned()),
|
||||
context_rx,
|
||||
)?;
|
||||
|
||||
// Finish writing stream in the background
|
||||
writer.write_background()?;
|
||||
|
||||
self.receive_plugin_call_response(rx, context)
|
||||
self.receive_plugin_call_response(rx, context, context_tx)
|
||||
}
|
||||
|
||||
/// Get the command signatures from the plugin.
|
||||
pub(crate) fn get_signature(&self) -> Result<Vec<PluginSignature>, ShellError> {
|
||||
match self.plugin_call(PluginCall::Signature, &None)? {
|
||||
match self.plugin_call(PluginCall::Signature, None)? {
|
||||
PluginCallResponse::Signature(sigs) => Ok(sigs),
|
||||
PluginCallResponse::Error(err) => Err(err.into()),
|
||||
_ => Err(ShellError::PluginFailedToDecode {
|
||||
@ -800,10 +825,9 @@ impl PluginInterface {
|
||||
pub(crate) fn run(
|
||||
&self,
|
||||
call: CallInfo<PipelineData>,
|
||||
context: Arc<impl PluginExecutionContext + 'static>,
|
||||
context: &mut dyn PluginExecutionContext,
|
||||
) -> Result<PipelineData, ShellError> {
|
||||
let context = Some(Context(context));
|
||||
match self.plugin_call(PluginCall::Run(call), &context)? {
|
||||
match self.plugin_call(PluginCall::Run(call), Some(context))? {
|
||||
PluginCallResponse::PipelineData(data) => Ok(data),
|
||||
PluginCallResponse::Error(err) => Err(err.into()),
|
||||
_ => Err(ShellError::PluginFailedToDecode {
|
||||
@ -821,7 +845,7 @@ impl PluginInterface {
|
||||
let op_name = op.name();
|
||||
let span = value.span;
|
||||
let call = PluginCall::CustomValueOp(value, op);
|
||||
match self.plugin_call(call, &None)? {
|
||||
match self.plugin_call(call, None)? {
|
||||
PluginCallResponse::PipelineData(out_data) => Ok(out_data.into_value(span)),
|
||||
PluginCallResponse::Error(err) => Err(err.into()),
|
||||
_ => Err(ShellError::PluginFailedToDecode {
|
||||
@ -869,7 +893,7 @@ impl PluginInterface {
|
||||
value.into_spanned(Span::unknown()),
|
||||
CustomValueOp::PartialCmp(other_value),
|
||||
);
|
||||
match self.plugin_call(call, &None)? {
|
||||
match self.plugin_call(call, None)? {
|
||||
PluginCallResponse::Ordering(ordering) => Ok(ordering),
|
||||
PluginCallResponse::Error(err) => Err(err.into()),
|
||||
_ => Err(ShellError::PluginFailedToDecode {
|
||||
@ -977,56 +1001,53 @@ impl Drop for PluginInterface {
|
||||
/// Handle an engine call.
|
||||
pub(crate) fn handle_engine_call(
|
||||
call: EngineCall<PipelineData>,
|
||||
context: &Option<Context>,
|
||||
context: Option<&mut (dyn PluginExecutionContext + '_)>,
|
||||
) -> Result<EngineCallResponse<PipelineData>, ShellError> {
|
||||
let call_name = call.name();
|
||||
let require_context = || {
|
||||
context.as_ref().ok_or_else(|| ShellError::GenericError {
|
||||
error: "A plugin execution context is required for this engine call".into(),
|
||||
msg: format!(
|
||||
"attempted to call {} outside of a command invocation",
|
||||
call_name
|
||||
),
|
||||
span: None,
|
||||
help: Some("this is probably a bug with the plugin".into()),
|
||||
inner: vec![],
|
||||
})
|
||||
};
|
||||
|
||||
let context = context.ok_or_else(|| ShellError::GenericError {
|
||||
error: "A plugin execution context is required for this engine call".into(),
|
||||
msg: format!(
|
||||
"attempted to call {} outside of a command invocation",
|
||||
call_name
|
||||
),
|
||||
span: None,
|
||||
help: Some("this is probably a bug with the plugin".into()),
|
||||
inner: vec![],
|
||||
})?;
|
||||
|
||||
match call {
|
||||
EngineCall::GetConfig => {
|
||||
let context = require_context()?;
|
||||
let config = Box::new(context.get_config()?);
|
||||
Ok(EngineCallResponse::Config(config))
|
||||
}
|
||||
EngineCall::GetPluginConfig => {
|
||||
let context = require_context()?;
|
||||
let plugin_config = context.get_plugin_config()?;
|
||||
Ok(plugin_config.map_or_else(EngineCallResponse::empty, EngineCallResponse::value))
|
||||
}
|
||||
EngineCall::GetEnvVar(name) => {
|
||||
let context = require_context()?;
|
||||
let value = context.get_env_var(&name)?;
|
||||
Ok(value.map_or_else(EngineCallResponse::empty, EngineCallResponse::value))
|
||||
}
|
||||
EngineCall::GetEnvVars => {
|
||||
let context = require_context()?;
|
||||
context.get_env_vars().map(EngineCallResponse::ValueMap)
|
||||
}
|
||||
EngineCall::GetEnvVars => context.get_env_vars().map(EngineCallResponse::ValueMap),
|
||||
EngineCall::GetCurrentDir => {
|
||||
let context = require_context()?;
|
||||
let current_dir = context.get_current_dir()?;
|
||||
Ok(EngineCallResponse::value(Value::string(
|
||||
current_dir.item,
|
||||
current_dir.span,
|
||||
)))
|
||||
}
|
||||
EngineCall::AddEnvVar(name, value) => {
|
||||
context.add_env_var(name, value)?;
|
||||
Ok(EngineCallResponse::empty())
|
||||
}
|
||||
EngineCall::EvalClosure {
|
||||
closure,
|
||||
positional,
|
||||
input,
|
||||
redirect_stdout,
|
||||
redirect_stderr,
|
||||
} => require_context()?
|
||||
} => context
|
||||
.eval_closure(closure, positional, input, redirect_stdout, redirect_stderr)
|
||||
.map(EngineCallResponse::PipelineData),
|
||||
}
|
||||
|
@ -1,7 +1,4 @@
|
||||
use std::{
|
||||
sync::{mpsc, Arc},
|
||||
time::Duration,
|
||||
};
|
||||
use std::{sync::mpsc, time::Duration};
|
||||
|
||||
use nu_protocol::{
|
||||
engine::Closure, IntoInterruptiblePipelineData, PipelineData, PluginSignature, ShellError,
|
||||
@ -24,8 +21,7 @@ use crate::{
|
||||
};
|
||||
|
||||
use super::{
|
||||
Context, PluginCallSubscription, PluginInterface, PluginInterfaceManager,
|
||||
ReceivedPluginCallMessage,
|
||||
Context, PluginCallState, PluginInterface, PluginInterfaceManager, ReceivedPluginCallMessage,
|
||||
};
|
||||
|
||||
#[test]
|
||||
@ -187,11 +183,12 @@ fn fake_plugin_call(
|
||||
// Set up a fake plugin call subscription
|
||||
let (tx, rx) = mpsc::channel();
|
||||
|
||||
manager.plugin_call_subscriptions.insert(
|
||||
manager.plugin_call_states.insert(
|
||||
id,
|
||||
PluginCallSubscription {
|
||||
PluginCallState {
|
||||
sender: Some(tx),
|
||||
context: None,
|
||||
ctrlc: None,
|
||||
context_rx: None,
|
||||
remaining_streams_to_read: 0,
|
||||
},
|
||||
);
|
||||
@ -388,7 +385,7 @@ fn manager_consume_call_response_registers_streams() -> Result<(), ShellError> {
|
||||
))?;
|
||||
|
||||
// ListStream should have one
|
||||
if let Some(sub) = manager.plugin_call_subscriptions.get(&0) {
|
||||
if let Some(sub) = manager.plugin_call_states.get(&0) {
|
||||
assert_eq!(
|
||||
1, sub.remaining_streams_to_read,
|
||||
"ListStream remaining_streams_to_read should be 1"
|
||||
@ -403,7 +400,7 @@ fn manager_consume_call_response_registers_streams() -> Result<(), ShellError> {
|
||||
);
|
||||
|
||||
// ExternalStream should have three
|
||||
if let Some(sub) = manager.plugin_call_subscriptions.get(&1) {
|
||||
if let Some(sub) = manager.plugin_call_states.get(&1) {
|
||||
assert_eq!(
|
||||
3, sub.remaining_streams_to_read,
|
||||
"ExternalStream remaining_streams_to_read should be 3"
|
||||
@ -483,20 +480,25 @@ fn manager_handle_engine_call_after_response_received() -> Result<(), ShellError
|
||||
let mut manager = test.plugin("test");
|
||||
manager.protocol_info = Some(ProtocolInfo::default());
|
||||
|
||||
let bogus = Context(Arc::new(PluginExecutionBogusContext));
|
||||
let (context_tx, context_rx) = mpsc::channel();
|
||||
|
||||
// Set up a situation identical to what we would find if the response had been read, but there
|
||||
// was still a stream being processed. We have nowhere to send the engine call in that case,
|
||||
// so the manager has to create a place to handle it.
|
||||
manager.plugin_call_subscriptions.insert(
|
||||
manager.plugin_call_states.insert(
|
||||
0,
|
||||
PluginCallSubscription {
|
||||
PluginCallState {
|
||||
sender: None,
|
||||
context: Some(bogus),
|
||||
ctrlc: None,
|
||||
context_rx: Some(context_rx),
|
||||
remaining_streams_to_read: 1,
|
||||
},
|
||||
);
|
||||
|
||||
// The engine will get the context from the channel
|
||||
let bogus = Context(Box::new(PluginExecutionBogusContext));
|
||||
context_tx.send(bogus).expect("failed to send");
|
||||
|
||||
manager.send_engine_call(0, 0, EngineCall::GetConfig)?;
|
||||
|
||||
// Not really much choice but to wait here, as the thread will have been spawned in the
|
||||
@ -528,7 +530,7 @@ fn manager_handle_engine_call_after_response_received() -> Result<(), ShellError
|
||||
// Whatever was used to make this happen should have been held onto, since spawning a thread
|
||||
// is expensive
|
||||
let sender = &manager
|
||||
.plugin_call_subscriptions
|
||||
.plugin_call_states
|
||||
.get(&0)
|
||||
.expect("missing subscription 0")
|
||||
.sender;
|
||||
@ -546,11 +548,12 @@ fn manager_send_plugin_call_response_removes_context_only_if_no_streams_to_read(
|
||||
let mut manager = TestCase::new().plugin("test");
|
||||
|
||||
for n in [0, 1] {
|
||||
manager.plugin_call_subscriptions.insert(
|
||||
manager.plugin_call_states.insert(
|
||||
n,
|
||||
PluginCallSubscription {
|
||||
PluginCallState {
|
||||
sender: None,
|
||||
context: None,
|
||||
ctrlc: None,
|
||||
context_rx: None,
|
||||
remaining_streams_to_read: n as i32,
|
||||
},
|
||||
);
|
||||
@ -562,11 +565,11 @@ fn manager_send_plugin_call_response_removes_context_only_if_no_streams_to_read(
|
||||
|
||||
// 0 should not still be present, but 1 should be
|
||||
assert!(
|
||||
!manager.plugin_call_subscriptions.contains_key(&0),
|
||||
!manager.plugin_call_states.contains_key(&0),
|
||||
"didn't clean up when there weren't remaining streams"
|
||||
);
|
||||
assert!(
|
||||
manager.plugin_call_subscriptions.contains_key(&1),
|
||||
manager.plugin_call_states.contains_key(&1),
|
||||
"clean up even though there were remaining streams"
|
||||
);
|
||||
Ok(())
|
||||
@ -578,11 +581,12 @@ fn manager_consume_stream_end_removes_context_only_if_last_stream() -> Result<()
|
||||
manager.protocol_info = Some(ProtocolInfo::default());
|
||||
|
||||
for n in [1, 2] {
|
||||
manager.plugin_call_subscriptions.insert(
|
||||
manager.plugin_call_states.insert(
|
||||
n,
|
||||
PluginCallSubscription {
|
||||
PluginCallState {
|
||||
sender: None,
|
||||
context: None,
|
||||
ctrlc: None,
|
||||
context_rx: None,
|
||||
remaining_streams_to_read: n as i32,
|
||||
},
|
||||
);
|
||||
@ -608,21 +612,21 @@ fn manager_consume_stream_end_removes_context_only_if_last_stream() -> Result<()
|
||||
// Ending 10 should cause 1 to be removed
|
||||
manager.consume(StreamMessage::End(10).into())?;
|
||||
assert!(
|
||||
!manager.plugin_call_subscriptions.contains_key(&1),
|
||||
!manager.plugin_call_states.contains_key(&1),
|
||||
"contains(1) after End(10)"
|
||||
);
|
||||
|
||||
// Ending 21 should not cause 2 to be removed
|
||||
manager.consume(StreamMessage::End(21).into())?;
|
||||
assert!(
|
||||
manager.plugin_call_subscriptions.contains_key(&2),
|
||||
manager.plugin_call_states.contains_key(&2),
|
||||
"!contains(2) after End(21)"
|
||||
);
|
||||
|
||||
// Ending 22 should cause 2 to be removed
|
||||
manager.consume(StreamMessage::End(22).into())?;
|
||||
assert!(
|
||||
!manager.plugin_call_subscriptions.contains_key(&2),
|
||||
!manager.plugin_call_states.contains_key(&2),
|
||||
"contains(2) after End(22)"
|
||||
);
|
||||
|
||||
@ -728,18 +732,15 @@ fn interface_goodbye() -> Result<(), ShellError> {
|
||||
fn interface_write_plugin_call_registers_subscription() -> Result<(), ShellError> {
|
||||
let mut manager = TestCase::new().plugin("test");
|
||||
assert!(
|
||||
manager.plugin_call_subscriptions.is_empty(),
|
||||
manager.plugin_call_states.is_empty(),
|
||||
"plugin call subscriptions not empty before start of test"
|
||||
);
|
||||
|
||||
let interface = manager.get_interface();
|
||||
let _ = interface.write_plugin_call(PluginCall::Signature, None)?;
|
||||
let _ = interface.write_plugin_call(PluginCall::Signature, None, mpsc::channel().1)?;
|
||||
|
||||
manager.receive_plugin_call_subscriptions();
|
||||
assert!(
|
||||
!manager.plugin_call_subscriptions.is_empty(),
|
||||
"not registered"
|
||||
);
|
||||
assert!(!manager.plugin_call_states.is_empty(), "not registered");
|
||||
Ok(())
|
||||
}
|
||||
|
||||
@ -749,7 +750,8 @@ fn interface_write_plugin_call_writes_signature() -> Result<(), ShellError> {
|
||||
let manager = test.plugin("test");
|
||||
let interface = manager.get_interface();
|
||||
|
||||
let (writer, _) = interface.write_plugin_call(PluginCall::Signature, None)?;
|
||||
let (writer, _) =
|
||||
interface.write_plugin_call(PluginCall::Signature, None, mpsc::channel().1)?;
|
||||
writer.write()?;
|
||||
|
||||
let written = test.next_written().expect("nothing written");
|
||||
@ -778,6 +780,7 @@ fn interface_write_plugin_call_writes_custom_value_op() -> Result<(), ShellError
|
||||
CustomValueOp::ToBaseValue,
|
||||
),
|
||||
None,
|
||||
mpsc::channel().1,
|
||||
)?;
|
||||
writer.write()?;
|
||||
|
||||
@ -812,6 +815,7 @@ fn interface_write_plugin_call_writes_run_with_value_input() -> Result<(), Shell
|
||||
input: PipelineData::Value(Value::test_int(-1), None),
|
||||
}),
|
||||
None,
|
||||
mpsc::channel().1,
|
||||
)?;
|
||||
writer.write()?;
|
||||
|
||||
@ -850,6 +854,7 @@ fn interface_write_plugin_call_writes_run_with_stream_input() -> Result<(), Shel
|
||||
input: values.clone().into_pipeline_data(None),
|
||||
}),
|
||||
None,
|
||||
mpsc::channel().1,
|
||||
)?;
|
||||
writer.write()?;
|
||||
|
||||
@ -912,7 +917,7 @@ fn interface_receive_plugin_call_receives_response() -> Result<(), ShellError> {
|
||||
.expect("failed to send on new channel");
|
||||
drop(tx); // so we don't deadlock on recv()
|
||||
|
||||
let response = interface.receive_plugin_call_response(rx, &None)?;
|
||||
let response = interface.receive_plugin_call_response(rx, None, mpsc::channel().0)?;
|
||||
assert!(
|
||||
matches!(response, PluginCallResponse::Signature(_)),
|
||||
"wrong response: {response:?}"
|
||||
@ -935,7 +940,7 @@ fn interface_receive_plugin_call_receives_error() -> Result<(), ShellError> {
|
||||
drop(tx); // so we don't deadlock on recv()
|
||||
|
||||
let error = interface
|
||||
.receive_plugin_call_response(rx, &None)
|
||||
.receive_plugin_call_response(rx, None, mpsc::channel().0)
|
||||
.expect_err("did not receive error");
|
||||
assert!(
|
||||
matches!(error, ShellError::ExternalNotSupported { .. }),
|
||||
@ -958,13 +963,13 @@ fn interface_receive_plugin_call_handles_engine_call() -> Result<(), ShellError>
|
||||
.expect("failed to send on new channel");
|
||||
|
||||
// The context should be a bogus context, which will return an error for GetConfig
|
||||
let context = Some(Context(Arc::new(PluginExecutionBogusContext)));
|
||||
let mut context = PluginExecutionBogusContext;
|
||||
|
||||
// We don't actually send a response, so `receive_plugin_call_response` should actually return
|
||||
// an error, but it should still do the engine call
|
||||
drop(tx);
|
||||
interface
|
||||
.receive_plugin_call_response(rx, &context)
|
||||
.receive_plugin_call_response(rx, Some(&mut context), mpsc::channel().0)
|
||||
.expect_err("no error even though there was no response");
|
||||
|
||||
// Check for the engine call response output
|
||||
@ -996,15 +1001,16 @@ fn start_fake_plugin_call_responder(
|
||||
std::thread::Builder::new()
|
||||
.name("fake plugin call responder".into())
|
||||
.spawn(move || {
|
||||
for (id, sub) in manager
|
||||
for (id, state) in manager
|
||||
.plugin_call_subscription_receiver
|
||||
.into_iter()
|
||||
.take(take)
|
||||
{
|
||||
for message in f(id) {
|
||||
sub.sender
|
||||
state
|
||||
.sender
|
||||
.as_ref()
|
||||
.expect("sender is None")
|
||||
.expect("sender was not set")
|
||||
.send(message)
|
||||
.expect("failed to send");
|
||||
}
|
||||
@ -1055,7 +1061,7 @@ fn interface_run() -> Result<(), ShellError> {
|
||||
},
|
||||
input: PipelineData::Empty,
|
||||
},
|
||||
PluginExecutionBogusContext.into(),
|
||||
&mut PluginExecutionBogusContext,
|
||||
)?;
|
||||
|
||||
assert_eq!(
|
||||
|
@ -348,6 +348,21 @@ impl PluginCallResponse<PipelineDataHeader> {
|
||||
}
|
||||
}
|
||||
|
||||
impl PluginCallResponse<PipelineData> {
|
||||
/// Does this response have a stream?
|
||||
pub(crate) fn has_stream(&self) -> bool {
|
||||
match self {
|
||||
PluginCallResponse::PipelineData(data) => match data {
|
||||
PipelineData::Empty => false,
|
||||
PipelineData::Value(..) => false,
|
||||
PipelineData::ListStream(..) => true,
|
||||
PipelineData::ExternalStream { .. } => true,
|
||||
},
|
||||
_ => false,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
/// Options that can be changed to affect how the engine treats the plugin
|
||||
#[derive(Serialize, Deserialize, Debug, Clone)]
|
||||
pub enum PluginOption {
|
||||
@ -447,6 +462,8 @@ pub enum EngineCall<D> {
|
||||
GetEnvVars,
|
||||
/// Get current working directory
|
||||
GetCurrentDir,
|
||||
/// Set an environment variable in the caller's scope
|
||||
AddEnvVar(String, Value),
|
||||
/// Evaluate a closure with stream input/output
|
||||
EvalClosure {
|
||||
/// The closure to call.
|
||||
@ -473,6 +490,7 @@ impl<D> EngineCall<D> {
|
||||
EngineCall::GetEnvVar(_) => "GetEnv",
|
||||
EngineCall::GetEnvVars => "GetEnvs",
|
||||
EngineCall::GetCurrentDir => "GetCurrentDir",
|
||||
EngineCall::AddEnvVar(..) => "AddEnvVar",
|
||||
EngineCall::EvalClosure { .. } => "EvalClosure",
|
||||
}
|
||||
}
|
||||
|
3
crates/nu-plugin/src/util/mod.rs
Normal file
3
crates/nu-plugin/src/util/mod.rs
Normal file
@ -0,0 +1,3 @@
|
||||
mod mutable_cow;
|
||||
|
||||
pub(crate) use mutable_cow::*;
|
35
crates/nu-plugin/src/util/mutable_cow.rs
Normal file
35
crates/nu-plugin/src/util/mutable_cow.rs
Normal file
@ -0,0 +1,35 @@
|
||||
/// Like [`Cow`] but with a mutable reference instead. So not exactly clone-on-write, but can be
|
||||
/// made owned.
|
||||
pub enum MutableCow<'a, T> {
|
||||
Borrowed(&'a mut T),
|
||||
Owned(T),
|
||||
}
|
||||
|
||||
impl<'a, T: Clone> MutableCow<'a, T> {
|
||||
pub fn owned(&self) -> MutableCow<'static, T> {
|
||||
match self {
|
||||
MutableCow::Borrowed(r) => MutableCow::Owned((*r).clone()),
|
||||
MutableCow::Owned(o) => MutableCow::Owned(o.clone()),
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, T> std::ops::Deref for MutableCow<'a, T> {
|
||||
type Target = T;
|
||||
|
||||
fn deref(&self) -> &T {
|
||||
match self {
|
||||
MutableCow::Borrowed(r) => r,
|
||||
MutableCow::Owned(o) => o,
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
impl<'a, T> std::ops::DerefMut for MutableCow<'a, T> {
|
||||
fn deref_mut(&mut self) -> &mut Self::Target {
|
||||
match self {
|
||||
MutableCow::Borrowed(r) => r,
|
||||
MutableCow::Owned(o) => o,
|
||||
}
|
||||
}
|
||||
}
|
@ -19,6 +19,12 @@ impl SimplePluginCommand for NuExampleEnv {
|
||||
"The name of the environment variable to get",
|
||||
)
|
||||
.switch("cwd", "Get current working directory instead", None)
|
||||
.named(
|
||||
"set",
|
||||
SyntaxShape::Any,
|
||||
"Set an environment variable to the value",
|
||||
None,
|
||||
)
|
||||
.search_terms(vec!["example".into(), "env".into()])
|
||||
.input_output_type(Type::Nothing, Type::Any)
|
||||
}
|
||||
@ -31,8 +37,22 @@ impl SimplePluginCommand for NuExampleEnv {
|
||||
_input: &Value,
|
||||
) -> Result<Value, LabeledError> {
|
||||
if call.has_flag("cwd")? {
|
||||
// Get working directory
|
||||
Ok(Value::string(engine.get_current_dir()?, call.head))
|
||||
match call.get_flag_value("set") {
|
||||
None => {
|
||||
// Get working directory
|
||||
Ok(Value::string(engine.get_current_dir()?, call.head))
|
||||
}
|
||||
Some(value) => Err(LabeledError {
|
||||
label: "Invalid arguments".into(),
|
||||
msg: "--cwd can't be used with --set".into(),
|
||||
span: Some(value.span()),
|
||||
}),
|
||||
}
|
||||
} else if let Some(value) = call.get_flag_value("set") {
|
||||
// Set single env var
|
||||
let name = call.req::<String>(0)?;
|
||||
engine.add_env_var(name, value)?;
|
||||
Ok(Value::nothing(call.head))
|
||||
} else if let Some(name) = call.opt::<String>(0)? {
|
||||
// Get single env var
|
||||
Ok(engine
|
||||
|
@ -42,3 +42,14 @@ fn get_current_dir() {
|
||||
assert!(result.status.success());
|
||||
assert_eq!(cwd, result.out);
|
||||
}
|
||||
|
||||
#[test]
|
||||
fn set_env() {
|
||||
let result = nu_with_plugins!(
|
||||
cwd: ".",
|
||||
plugin: ("nu_plugin_example"),
|
||||
"nu-example-env NUSHELL_OPINION --set=rocks; $env.NUSHELL_OPINION"
|
||||
);
|
||||
assert!(result.status.success());
|
||||
assert_eq!("rocks", result.out);
|
||||
}
|
||||
|
Loading…
Reference in New Issue
Block a user