[yabridgectl] Symlink VST 3.6.10 bundle resources

Although I haven't run into any of these 'new' bundles yet. Everything's
still in the legacy format.

tools/yabridgectl/src/actions.rs

@@ -282,7 +282,19 @@ pub fn do_sync(config: &mut Config, options: &SyncOptions) -> Result<()> {
                     &windows_module_path,
                 )?;
 
-                // TODO: Symlink resources and presets
+                // If `module` is a bundle, then it may contain a `Resources` directory with
+                // screenshots and documentation
+                // TODO: Also symlink presets, but this is a bit more involved. See
+                //       https://steinbergmedia.github.io/vst3_doc/vstinterfaces/vst3loc.html#win7preset
+                if let Some(original_resources_dir) = module.original_resources_dir() {
+                    install_file(
+                        false,
+                        InstallationMethod::Symlink,
+                        &original_resources_dir,
+                        None,
+                        &module.target_resources_dir(),
+                    )?;
+                }
 
                 if options.verbose {
                     println!("  {}", module.original_path().display());

tools/yabridgectl/src/files.rs

@@ -138,6 +138,23 @@ impl Vst3Module {
         }
     }
 
+    /// If this was a VST 3.6.10 style bundle, then return the path to the `Resources` directory if
+    /// it has one.
+    pub fn original_resources_dir(&self) -> Option<PathBuf> {
+        match &self {
+            Vst3Module::Bundle(bundle_home, _) => {
+                let mut path = bundle_home.join("Contents");
+                path.push("Resources");
+                if path.exists() {
+                    Some(path)
+                } else {
+                    None
+                }
+            }
+            Vst3Module::Legacy(_, _) => None,
+        }
+    }
+
     /// Get the path to the bundle in `~/.vst3` corresponding to the bridged version of this module.
     ///
     /// FIXME: How do we solve naming clashes from the same VST3 plugin being installed to multiple
@@ -175,6 +192,16 @@ impl Vst3Module {
         path.push(self.original_module_name());
         path
     }
+
+    /// If the Windows VST3 plugin we're bridging was in a VST 3.6.10 style bundle and had a
+    /// resources directory, then we'll symlink that directory to here so the host can access all
+    /// its original resources.
+    pub fn target_resources_dir(&self) -> PathBuf {
+        let mut path = self.target_bundle_home();
+        path.push("Contents");
+        path.push("Resources");
+        path
+    }
 }
 
 /// The architecture of a `.dll` file. Needed so we can create a merged bundle for VST3 plugins.