4 files changed, 75 insertions, 10 deletions

diff --git a/crates/rust-analyzer/Cargo.toml b/crates/rust-analyzer/Cargo.toml
index 758aa1c5d..3f9c820c5 100644
--- a/crates/rust-analyzer/Cargo.toml
+++ b/crates/rust-analyzer/Cargo.toml
@@ -58,7 +58,6 @@ ra_proc_macro_srv = { path = "../ra_proc_macro_srv" }
 winapi = "0.3.8"
 
 [dev-dependencies]
-tempfile = "3.1.0"
 expect = { path = "../expect" }
 test_utils = { path = "../test_utils" }
 mbe = { path = "../ra_mbe", package = "ra_mbe" }
diff --git a/crates/rust-analyzer/tests/heavy_tests/main.rs b/crates/rust-analyzer/tests/heavy_tests/main.rs
index 93448834f..28e896648 100644
--- a/crates/rust-analyzer/tests/heavy_tests/main.rs
+++ b/crates/rust-analyzer/tests/heavy_tests/main.rs
@@ -1,3 +1,4 @@
+mod testdir;
 mod support;
 
 use std::{collections::HashMap, path::PathBuf, time::Instant};
@@ -12,10 +13,12 @@ use lsp_types::{
 };
 use rust_analyzer::lsp_ext::{OnEnter, Runnables, RunnablesParams};
 use serde_json::json;
-use tempfile::TempDir;
 use test_utils::skip_slow_tests;
 
-use crate::support::{project, Project};
+use crate::{
+    support::{project, Project},
+    testdir::TestDir,
+};
 
 const PROFILE: &str = "";
 // const PROFILE: &'static str = "*@3>100";
@@ -308,7 +311,7 @@ fn test_missing_module_code_action_in_json_project() {
         return;
     }
 
-    let tmp_dir = TempDir::new().unwrap();
+    let tmp_dir = TestDir::new();
 
     let path = tmp_dir.path();
 
diff --git a/crates/rust-analyzer/tests/heavy_tests/support.rs b/crates/rust-analyzer/tests/heavy_tests/support.rs
index e51796d36..e152264d3 100644
--- a/crates/rust-analyzer/tests/heavy_tests/support.rs
+++ b/crates/rust-analyzer/tests/heavy_tests/support.rs
@@ -19,14 +19,15 @@ use rust_analyzer::{
 };
 use serde::Serialize;
 use serde_json::{to_string_pretty, Value};
-use tempfile::TempDir;
 use test_utils::{find_mismatch, Fixture};
 use vfs::AbsPathBuf;
 
+use crate::testdir::TestDir;
+
 pub struct Project<'a> {
     fixture: &'a str,
     with_sysroot: bool,
-    tmp_dir: Option<TempDir>,
+    tmp_dir: Option<TestDir>,
     roots: Vec<PathBuf>,
     config: Option<Box<dyn Fn(&mut Config)>>,
 }
@@ -36,7 +37,7 @@ impl<'a> Project<'a> {
         Project { fixture, tmp_dir: None, roots: vec![], with_sysroot: false, config: None }
     }
 
-    pub fn tmp_dir(mut self, tmp_dir: TempDir) -> Project<'a> {
+    pub fn tmp_dir(mut self, tmp_dir: TestDir) -> Project<'a> {
         self.tmp_dir = Some(tmp_dir);
         self
     }
@@ -57,7 +58,7 @@ impl<'a> Project<'a> {
     }
 
     pub fn server(self) -> Server {
-        let tmp_dir = self.tmp_dir.unwrap_or_else(|| TempDir::new().unwrap());
+        let tmp_dir = self.tmp_dir.unwrap_or_else(|| TestDir::new());
         static INIT: Once = Once::new();
         INIT.call_once(|| {
             env_logger::builder().is_test(true).try_init().unwrap();
@@ -112,11 +113,11 @@ pub struct Server {
     _thread: jod_thread::JoinHandle<()>,
     client: Connection,
     /// XXX: remove the tempdir last
-    dir: TempDir,
+    dir: TestDir,
 }
 
 impl Server {
-    fn new(dir: TempDir, config: Config) -> Server {
+    fn new(dir: TestDir, config: Config) -> Server {
         let (connection, client) = Connection::memory();
 
         let _thread = jod_thread::Builder::new()
diff --git a/crates/rust-analyzer/tests/heavy_tests/testdir.rs b/crates/rust-analyzer/tests/heavy_tests/testdir.rs
new file mode 100644
index 000000000..7487e7429
--- /dev/null
+++ b/crates/rust-analyzer/tests/heavy_tests/testdir.rs
@@ -0,0 +1,62 @@
+use std::{
+    fs, io,
+    path::{Path, PathBuf},
+    sync::atomic::{AtomicUsize, Ordering},
+};
+
+pub struct TestDir {
+    path: PathBuf,
+    keep: bool,
+}
+
+impl TestDir {
+    pub fn new() -> TestDir {
+        let base = std::env::temp_dir().join("testdir");
+        let pid = std::process::id();
+
+        static CNT: AtomicUsize = AtomicUsize::new(0);
+        for _ in 0..100 {
+            let cnt = CNT.fetch_add(1, Ordering::Relaxed);
+            let path = base.join(format!("{}_{}", pid, cnt));
+            if path.is_dir() {
+                continue;
+            }
+            fs::create_dir_all(&path).unwrap();
+            return TestDir { path, keep: false };
+        }
+        panic!("Failed to create a temporary directory")
+    }
+    #[allow(unused)]
+    pub fn keep(mut self) -> TestDir {
+        self.keep = true;
+        self
+    }
+    pub fn path(&self) -> &Path {
+        &self.path
+    }
+}
+
+impl Drop for TestDir {
+    fn drop(&mut self) {
+        if self.keep {
+            return;
+        }
+        remove_dir_all(&self.path).unwrap()
+    }
+}
+
+#[cfg(not(windows))]
+fn remove_dir_all(path: &Path) -> io::Result<()> {
+    fs::remove_dir_all(path)
+}
+
+#[cfg(windows)]
+fn remove_dir_all(path: &Path) -> io::Result<()> {
+    for _ in 0..99 {
+        if fs::remove_dir_all(path).is_ok() {
+            return Ok(());
+        }
+        std::thread::sleep(std::time::Duration::from_millis(10))
+    }
+    fs::remove_dir_all(path)
+}