feat(bundler): add visual c++ redistributable files with MSM

.changes/vc-redistributable.md

@@ -0,0 +1,5 @@
+---
+"tauri-bundler": patch
+---
+
+Bundle Visual C++ redistributable files with VC142_CRT merge modules.

cli/core/src/build.rs

@@ -100,6 +100,26 @@ impl Build {
 
     if config_.tauri.bundle.active {
       let bundler_settings = rust::get_bundler_settings(&config_, self.debug)?;
+      // move merge modules to the out dir so the bundler can load it
+      #[cfg(windows)]
+      {
+        let (filename, vcruntime_msm) = if cfg!(target_arch = "x86") {
+          let _ =
+            std::fs::remove_file(bundler_settings.out_dir.join("Microsoft_VC142_CRT_x64.msm"));
+          (
+            "Microsoft_VC142_CRT_x86.msm",
+            include_bytes!("./MergeModules/Microsoft_VC142_CRT_x86.msm").to_vec(),
+          )
+        } else {
+          let _ =
+            std::fs::remove_file(bundler_settings.out_dir.join("Microsoft_VC142_CRT_x86.msm"));
+          (
+            "Microsoft_VC142_CRT_x64.msm",
+            include_bytes!("./MergeModules/Microsoft_VC142_CRT_x64.msm").to_vec(),
+          )
+        };
+        std::fs::write(bundler_settings.out_dir.join(filename), vcruntime_msm)?;
+      }
       let mut settings_builder = SettingsBuilder::new()
         .package_settings(bundler_settings.package_settings)
         .bundle_settings(bundler_settings.bundle_settings)

cli/tauri-bundler/src/bundle/templates/main.wxs

@@ -112,6 +112,16 @@
            </Component>
         </DirectoryRef>
 
+        {{#each merge_modules as |msm| ~}}
+        <DirectoryRef Id="TARGETDIR">
+            <Merge Id="{{ msm.name }}" SourceFile="{{ msm.path }}" DiskId="1" Language="0"/>
+        </DirectoryRef>
+
+        <Feature Id="{{ msm.name }}" Title="{{ msm.name }}" AllowAdvertise="no" Display="hidden" Level="1">
+            <MergeRef Id="{{ msm.name }}"/>
+        </Feature>
+        {{/each~}}
+
         <Feature
                 Id="MainProgram"
                 Title="Application"

cli/tauri-bundler/src/bundle/wix.rs

@@ -482,6 +482,9 @@ pub fn build_wix_app_installer(
   data.insert("resources", to_json(resources_wix_string));
   data.insert("resource_file_ids", to_json(files_ids));
 
+  let merge_modules = get_merge_modules(&settings)?;
+  data.insert("merge_modules", to_json(merge_modules));
+
   let main_binary = settings
     .binaries()
     .iter()
@@ -572,6 +575,38 @@ fn generate_binaries_data(settings: &Settings) -> crate::Result<Vec<Binary>> {
   Ok(binaries)
 }
 
+#[derive(Serialize)]
+struct MergeModule {
+  name: String,
+  path: String,
+}
+
+fn get_merge_modules(settings: &Settings) -> crate::Result<Vec<MergeModule>> {
+  let mut merge_modules = Vec::new();
+  let regex = Regex::new(r"[^\w\d\.]")?;
+  for msm in glob::glob(
+    settings
+      .project_out_directory()
+      .join("*.msm")
+      .to_string_lossy()
+      .to_string()
+      .as_str(),
+  )? {
+    let path = msm?;
+    let filename = path
+      .file_name()
+      .expect("failed to extract merge module filename")
+      .to_os_string()
+      .into_string()
+      .expect("failed to convert merge module filename to string");
+    merge_modules.push(MergeModule {
+      name: regex.replace_all(&filename, "").to_string(),
+      path: path.to_string_lossy().to_string(),
+    });
+  }
+  Ok(merge_modules)
+}
+
 /// Generates the data required for the resource bundling on wix
 fn generate_resource_data(settings: &Settings) -> crate::Result<ResourceMap> {
   let mut resources = ResourceMap::new();