fix(bundler): sidecar on Windows, closes #3446 (#3482)

Author: lucasfernog

.changes/fix-windows-sidecar.md

@@ -0,0 +1,5 @@
+---
+"tauri-bundler": patch
+---
+
+Fixes sidecar bundling on Windows.

examples/sidecar/src-tauri/Cargo.lock

@@ -495,6 +495,11 @@ impl Settings {
     &self.project_out_directory
   }
 
+  /// Returns the target triple.
+  pub fn target(&self) -> &str {
+    &self.target
+  }
+
   /// Returns the architecture for the binary being bundled (e.g. "arm", "x86" or "x86_64").
   pub fn binary_arch(&self) -> &str {
     if self.target.starts_with("x86_64") {
@@ -634,6 +639,7 @@ impl Settings {
           .to_string_lossy()
           .replace(&format!("-{}", self.target), ""),
       );
+      println!("{:?} {:?} {:?}", src, dest, self.target);
       common::copy_file(&src, &dest)?;
     }
     Ok(())

tooling/bundler/src/bundle/settings.rs

@@ -716,13 +716,21 @@ pub fn build_wix_app_installer(
 fn generate_binaries_data(settings: &Settings) -> crate::Result<Vec<Binary>> {
   let mut binaries = Vec::new();
   let cwd = std::env::current_dir()?;
+  let tmp_dir = std::env::temp_dir();
   for src in settings.external_binaries() {
     let src = src?;
+    let binary_path = cwd.join(&src);
+    let dest_filename = src
+      .file_name()
+      .expect("failed to extract external binary filename")
+      .to_string_lossy()
+      .replace(&format!("-{}", settings.target()), "");
+    let dest = tmp_dir.join(dest_filename);
+    std::fs::copy(binary_path, &dest)?;
 
     binaries.push(Binary {
       guid: Uuid::new_v4().to_string(),
-      path: cwd
-        .join(src)
+      path: dest
         .into_os_string()
         .into_string()
         .expect("failed to read external binary path"),