forked from extern/nushell
159 lines
5.5 KiB
Rust
159 lines
5.5 KiB
Rust
use crate::commands::command::SinkCommandArgs;
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use crate::errors::ShellError;
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use crate::prelude::*;
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use serde::{self, Deserialize, Serialize};
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use std::io::prelude::*;
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use std::io::BufReader;
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use std::io::Write;
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#[derive(Debug, Serialize, Deserialize)]
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pub struct JsonRpc<T> {
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jsonrpc: String,
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pub method: String,
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pub params: T,
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}
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impl<T> JsonRpc<T> {
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pub fn new<U: Into<String>>(method: U, params: T) -> Self {
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JsonRpc {
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jsonrpc: "2.0".into(),
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method: method.into(),
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params,
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}
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}
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}
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#[derive(Debug, Serialize, Deserialize)]
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#[serde(tag = "method")]
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#[allow(non_camel_case_types)]
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pub enum NuResult {
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response {
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params: Result<VecDeque<ReturnValue>, ShellError>,
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},
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}
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pub fn filter_plugin(plugin_name: String, args: CommandArgs) -> Result<OutputStream, ShellError> {
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let mut path = std::path::PathBuf::from(".");
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path.push("target");
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path.push("debug");
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path.push(format!("nu_plugin_{}", plugin_name));
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path = if path.exists() {
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path
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} else {
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std::path::PathBuf::from(format!("nu_plugin_{}", plugin_name))
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};
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let mut child = std::process::Command::new(path)
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.stdin(std::process::Stdio::piped())
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.stdout(std::process::Stdio::piped())
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.spawn()
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.expect("Failed to spawn child process");
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{
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let stdin = child.stdin.as_mut().expect("Failed to open stdin");
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let stdout = child.stdout.as_mut().expect("Failed to open stdout");
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let _reader = BufReader::new(stdout);
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let request = JsonRpc::new("begin_filter", args.args);
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let request_raw = serde_json::to_string(&request).unwrap();
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stdin.write(format!("{}\n", request_raw).as_bytes())?;
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}
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let mut eos = VecDeque::new();
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eos.push_back(Value::Primitive(Primitive::EndOfStream));
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let stream = args
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.input
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.chain(eos)
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.map(move |v| match v {
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Value::Primitive(Primitive::EndOfStream) => {
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let stdin = child.stdin.as_mut().expect("Failed to open stdin");
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let stdout = child.stdout.as_mut().expect("Failed to open stdout");
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let _ = BufReader::new(stdout);
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let request: JsonRpc<std::vec::Vec<Value>> = JsonRpc::new("quit", vec![]);
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let request_raw = serde_json::to_string(&request).unwrap();
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let _ = stdin.write(format!("{}\n", request_raw).as_bytes()); // TODO: Handle error
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VecDeque::new()
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}
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_ => {
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let stdin = child.stdin.as_mut().expect("Failed to open stdin");
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let stdout = child.stdout.as_mut().expect("Failed to open stdout");
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let mut reader = BufReader::new(stdout);
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let request = JsonRpc::new("filter", v);
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let request_raw = serde_json::to_string(&request).unwrap();
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let _ = stdin.write(format!("{}\n", request_raw).as_bytes()); // TODO: Handle error
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let mut input = String::new();
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match reader.read_line(&mut input) {
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Ok(_) => {
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let response = serde_json::from_str::<NuResult>(&input);
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match response {
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Ok(NuResult::response { params }) => match params {
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Ok(params) => params,
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Err(e) => {
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let mut result = VecDeque::new();
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result.push_back(ReturnValue::Value(Value::Error(Box::new(e))));
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result
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}
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},
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Err(e) => {
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let mut result = VecDeque::new();
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result.push_back(ReturnValue::Value(Value::Error(Box::new(
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ShellError::string(format!(
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"Error while processing input: {:?} {}",
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e, input
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)),
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))));
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result
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}
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}
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}
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Err(e) => {
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let mut result = VecDeque::new();
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result.push_back(ReturnValue::Value(Value::Error(Box::new(
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ShellError::string(format!("Error while processing input: {:?}", e)),
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))));
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result
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}
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}
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}
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})
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.flatten();
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Ok(stream.boxed())
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}
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pub fn sink_plugin(plugin_name: String, args: SinkCommandArgs) -> Result<(), ShellError> {
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let mut path = std::path::PathBuf::from(".");
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path.push("target");
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path.push("debug");
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path.push(format!("nu_plugin_{}", plugin_name));
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path = if path.exists() {
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path
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} else {
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std::path::PathBuf::from(format!("nu_plugin_{}", plugin_name))
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};
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let mut child = std::process::Command::new(path)
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.stdin(std::process::Stdio::piped())
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.spawn()
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.expect("Failed to spawn child process");
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let stdin = child.stdin.as_mut().expect("Failed to open stdin");
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let request = JsonRpc::new("sink", (args.args, args.input));
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let request_raw = serde_json::to_string(&request).unwrap();
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stdin.write(format!("{}\n", request_raw).as_bytes())?;
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let _ = child.wait();
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Ok(())
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}
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