From ea18376bc80c46621dd2c80a4eef8ff6556ada52 Mon Sep 17 00:00:00 2001
From: Alex Butler <alexheretic@gmail.com>
Date: Fri, 25 May 2018 15:39:41 +0100
Subject: [PATCH] Workaround UNC path fs::canonicalize return

Reported in #838
Also see https://github.com/rust-lang/rust/issues/42869
---
 src/cmd.rs | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/cmd.rs b/src/cmd.rs
index 6ba6b02d7bd..3c1c114799f 100644
--- a/src/cmd.rs
+++ b/src/cmd.rs
@@ -398,10 +398,17 @@ fn initialize(root_path: String) -> Request<server::InitializeRequest> {
 }
 
 fn url(file_name: &str) -> Url {
-    let path = Path::new(file_name)
+    let canonical = Path::new(file_name)
         .canonicalize()
         .expect("Could not canonicalize file name");
-    Url::parse(&format!("file://{}", path.to_str().unwrap())).expect("Bad file name")
+    let mut path = canonical.to_str().unwrap();
+
+    // workaround for UNC path see https://github.com/rust-lang/rust/issues/42869
+    if path.starts_with(r"\\?\") {
+        path = &path[r"\\?\".len()..];
+    }
+
+    Url::parse(&format!("file://{}", path)).expect("Bad file name")
 }
 
 fn next_id() -> usize {