Strip UNC paths when running hook commands on Windows. (#891)

Author: bicarlsen

src/hooks.rs

@@ -15,8 +15,14 @@ pub fn spawn_hooks(cfg: Arc<RtcBuild>, stage: PipelineStage) -> HookHandles {
         .filter(|hook_cfg| hook_cfg.stage == stage)
         .map(|hook_cfg| {
             let mut command = Command::new(hook_cfg.command());
+            let current_dir = if cfg!(target_os = "windows") {
+                dunce::simplified(&cfg.core.working_directory)
+            } else {
+                cfg.core.working_directory.as_path()
+            };
+
             command
-                .current_dir(&cfg.core.working_directory)
+                .current_dir(current_dir)
                 .args(hook_cfg.command_arguments())
                 .stdout(Stdio::inherit())
                 .stderr(Stdio::inherit())