remove threadpool deps

Cargo.lock

@@ -1302,7 +1302,6 @@ dependencies = [
  "once_cell",
  "serde",
  "tempfile",
- "threadpool",
  "toml",
  "tree-sitter",
 ]
@@ -2270,15 +2269,6 @@ dependencies = [
  "syn 2.0.48",
 ]
 
-[[package]]
-name = "threadpool"
-version = "1.8.1"
-source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "d050e60b33d41c19108b32cea32164033a9013fe3b46cbd4457559bfbf77afaa"
-dependencies = [
- "num_cpus",
-]
-
 [[package]]
 name = "time"
 version = "0.3.23"

helix-loader/Cargo.toml

@@ -29,7 +29,6 @@ log = "0.4"
 
 # cloning/compiling tree-sitter grammars
 cc = { version = "1" }
-threadpool = { version = "1.0" }
 tempfile = "3.10.1"
 dunce = "1.0.4"
 

helix-loader/src/grammar.rs

@@ -1,6 +1,5 @@
 use anyhow::{anyhow, bail, Context, Result};
 use serde::{Deserialize, Serialize};
-use std::fs;
 use std::time::SystemTime;
 use std::{
     collections::HashSet,
@@ -8,6 +7,7 @@ use std::{
     process::Command,
     sync::mpsc::channel,
 };
+use std::{fs, thread};
 use tempfile::TempPath;
 use tree_sitter::Language;
 
@@ -225,25 +225,28 @@ where
     F: Fn(GrammarConfiguration) -> Result<Res> + Send + 'static + Clone,
     Res: Send + 'static,
 {
-    let pool = threadpool::Builder::new().build();
     let (tx, rx) = channel();
+    let mut handles = Vec::new();
 
     for grammar in grammars {
-        let tx = tx.clone();
-        let job = job.clone();
+        let tx = tx.to_owned();
+        let job = job.to_owned();
 
-        pool.execute(move || {
-            // Ignore any SendErrors, if any job in another thread has encountered an
-            // error the Receiver will be closed causing this send to fail.
-            let _ = tx.send((grammar.grammar_id.clone(), job(grammar)));
+        let handle = thread::spawn(move || {
+            let result = (grammar.grammar_id.to_owned(), job(grammar));
+            let _ = tx.send(result);
         });
+
+        handles.push(handle);
     }
 
-    drop(tx);
+    for handle in handles {
+        handle.join().unwrap();
+    }
 
+    drop(tx);
     rx.iter().collect()
 }
-
 enum FetchStatus {
     GitUpToDate,
     GitUpdated { revision: String },