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Plugin with evaluated call (#393)

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* plugin trait

* impl of trait

* record and absolute path

* plugin example crate

* clippy error

* correcting cargo

* evaluated call for plugin
This commit is contained in:
Fernando Herrera
2021-12-02 05:42:56 +00:00
committed by GitHub
parent 2bbba3f5da
commit 56307553ae
29 changed files with 1140 additions and 770 deletions
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4
crates/nu-protocol/src/engine/command.rs
View File

@ -1,3 +1,5 @@
use std::path::PathBuf;
use crate::{ast::Call, BlockId, Example, PipelineData, ShellError, Signature};
use super::{EngineState, Stack};
@ -47,7 +49,7 @@ pub trait Command: Send + Sync + CommandClone {
}
// Is a plugin command
fn is_plugin(&self) -> Option<&str> {
fn is_plugin(&self) -> Option<&PathBuf> {
None
}

39
crates/nu-protocol/src/engine/engine_state.rs
View File

@ -222,26 +222,27 @@ impl EngineState {
if let Some(plugin_path) = &self.plugin_signatures {
// Always creating the file which will erase previous signatures
let mut plugin_file = std::fs::File::create(plugin_path.as_path())
.map_err(|err| ShellError::PluginError(err.to_string()))?;
.map_err(|err| ShellError::InternalError(err.to_string()))?;
// Plugin definitions with parsed signature
for decl in self.plugin_decls() {
// A successful plugin registration already includes the plugin filename
// No need to check the None option
let file_name = decl.is_plugin().expect("plugin should have file name");
let path = decl.is_plugin().expect("plugin should have file name");
let file_name = path.to_str().expect("path should be a str");
let line = serde_json::to_string_pretty(&decl.signature())
.map(|signature| format!("register {} {}\n", file_name, signature))
.map_err(|err| ShellError::PluginError(err.to_string()))?;
.map_err(|err| ShellError::InternalError(err.to_string()))?;
plugin_file
.write_all(line.as_bytes())
.map_err(|err| ShellError::PluginError(err.to_string()))?;
.map_err(|err| ShellError::InternalError(err.to_string()))?;
}
Ok(())
} else {
Err(ShellError::PluginError("Plugin file not found".into()))
Err(ShellError::InternalError("Plugin file not found".into()))
}
}
@ -510,11 +511,13 @@ pub struct StateDelta {
pub(crate) file_contents: Vec<(Vec<u8>, usize, usize)>,
vars: Vec<Type>, // indexed by VarId
decls: Vec<Box<dyn Command>>, // indexed by DeclId
#[cfg(feature = "plugin")]
plugin_decls: Vec<Box<dyn Command>>, // indexed by DeclId
blocks: Vec<Block>, // indexed by BlockId
overlays: Vec<Overlay>, // indexed by OverlayId
pub scope: Vec<ScopeFrame>,
#[cfg(feature = "plugin")]
pub plugin_signatures: Vec<(PathBuf, Option<Signature>)>,
#[cfg(feature = "plugin")]
plugin_decls: Vec<Box<dyn Command>>,
}
impl StateDelta {
@ -551,11 +554,13 @@ impl<'a> StateWorkingSet<'a> {
file_contents: vec![],
vars: vec![],
decls: vec![],
#[cfg(feature = "plugin")]
plugin_decls: vec![],
blocks: vec![],
overlays: vec![],
scope: vec![ScopeFrame::new()],
#[cfg(feature = "plugin")]
plugin_signatures: vec![],
#[cfg(feature = "plugin")]
plugin_decls: vec![],
},
permanent_state,
}
@ -624,8 +629,20 @@ impl<'a> StateWorkingSet<'a> {
}
#[cfg(feature = "plugin")]
pub fn add_plugin_decl(&mut self, decl: Box<dyn Command>) {
self.delta.plugin_decls.push(decl);
pub fn add_plugin_decls(&mut self, decls: Vec<Box<dyn Command>>) {
for decl in decls {
self.delta.plugin_decls.push(decl);
}
}
#[cfg(feature = "plugin")]
pub fn add_plugin_signature(&mut self, path: PathBuf, signature: Option<Signature>) {
self.delta.plugin_signatures.push((path, signature));
}
#[cfg(feature = "plugin")]
pub fn get_signatures(&self) -> impl Iterator<Item = &(PathBuf, Option<Signature>)> {
self.delta.plugin_signatures.iter()
}
pub fn merge_predecl(&mut self, name: &[u8]) -> Option<DeclId> {