Changes to allow plugins to be loaded in a multi-threaded manner (#1694)

* Changes to allow plugins to be loaded in a multi-threaded manner in order to decrease startup time.

* Ran rust fmt and clippy to find and fix first pass errors.
Updated launch.jason to make debugging easier in vscode.
Also added tasks.json so tasks like clippy can be ran easily.

* ran fmt again

* Delete launch.json

Remove IDE settings file

* Remove IDE settings file

* Ignore vscode IDE settings

* Cloned the context instead of Arc/Mutexing it.

Co-authored-by: Darren Schroeder <fdncred@hotmail.com>
Co-authored-by: Jonathan Turner <jonathandturner@users.noreply.github.com>

.gitignore

@@ -17,3 +17,6 @@ debian/nu/
 
 # JetBrains' IDE items
 .idea/*
+
+# VSCode's IDE items
+.vscode/*

Cargo.lock

@@ -2175,6 +2175,7 @@ dependencies = [
  "quickcheck",
  "quickcheck_macros",
  "rand",
+ "rayon",
  "regex",
  "roxmltree",
  "rusqlite",
@@ -2210,6 +2211,7 @@ dependencies = [
  "bigdecimal",
  "derive-new",
  "getset",
+ "glob",
  "language-reporting",
  "nu-build",
  "nu-source",

crates/nu-cli/Cargo.toml

@@ -89,6 +89,7 @@ which = "3"
 trash = { version = "1.0.0", optional = true }
 clipboard = { version = "0.5", optional = true }
 starship = { version = "0.39.0", optional = true }
+rayon = "1.3.0"
 
 [target.'cfg(unix)'.dependencies]
 users = "0.10.0"

crates/nu-cli/src/cli.rs

@@ -26,6 +26,8 @@ use std::iter::Iterator;
 use std::path::{Path, PathBuf};
 use std::sync::atomic::Ordering;
 
+use rayon::prelude::*;
+
 fn load_plugin(path: &std::path::Path, context: &mut Context) -> Result<(), ShellError> {
     let mut child = std::process::Command::new(path)
         .stdin(std::process::Stdio::piped())
@@ -132,18 +134,21 @@ pub fn load_plugins(context: &mut Context) -> Result<(), ShellError> {
 
         pattern.push(std::path::Path::new("nu_plugin_[a-z0-9][a-z0-9]*"));
 
-        match glob::glob_with(&pattern.to_string_lossy(), opts) {
+        let plugs: Vec<_> = glob::glob_with(&pattern.to_string_lossy(), opts)?
-            Err(_) => {}
+            .filter_map(|x| x.ok())
-            Ok(binaries) => {
+            .collect();
-                for bin in binaries.filter_map(Result::ok) {
+
+        let _failures: Vec<_> = plugs
+            .par_iter()
+            .map(|path| {
                 let bin_name = {
-                        if let Some(name) = bin.file_name() {
+                    if let Some(name) = path.file_name() {
                         match name.to_str() {
                             Some(raw) => raw,
-                                None => continue,
+                            None => "",
                         }
                     } else {
-                            continue;
+                        ""
                     }
                 };
 
@@ -176,14 +181,13 @@ pub fn load_plugins(context: &mut Context) -> Result<(), ShellError> {
                 };
 
                 if is_valid_name && is_executable {
-                        trace!("Trying {:?}", bin.display());
+                    trace!("Trying {:?}", path.display());
 
                     // we are ok if this plugin load fails
-                        let _ = load_plugin(&bin, context);
+                    let _ = load_plugin(&path, &mut context.clone());
-                    }
-                }
-            }
                 }
+            })
+            .collect();
     }
 
     Ok(())

crates/nu-errors/Cargo.toml

@@ -25,6 +25,7 @@ getset = "0.1.0"
 serde_yaml = "0.8"
 toml = "0.5.6"
 serde_json = "1.0.51"
+glob = "0.3.0"
 
 [build-dependencies]
 nu-build = { version = "0.13.0", path = "../nu-build" }

crates/nu-errors/src/lib.rs

@@ -864,6 +864,12 @@ impl std::convert::From<Box<dyn std::error::Error + Send + Sync>> for ShellError
     }
 }
 
+impl std::convert::From<glob::PatternError> for ShellError {
+    fn from(input: glob::PatternError) -> ShellError {
+        ShellError::untagged_runtime_error(format!("{:?}", input))
+    }
+}
+
 pub trait CoerceInto<U> {
     fn coerce_into(self, operation: impl Into<String>) -> Result<U, ShellError>;
 }