Hide dotfiles on Windows (#10376)

related #10071

Request from @jdunkerley to hide all dotfiles on Windows.

app/ide-desktop/lib/project-manager-shim/src/projectManagerShimMiddleware.ts

@@ -221,13 +221,7 @@ export default function projectManagerShimMiddleware(
                                         const entries: FileSystemEntry[] = []
                                         for (const entryName of entryNames) {
                                             const entryPath = path.join(directoryPath, entryName)
-                                            try {
+                                            if (isHidden(entryPath)) continue
-                                                if (isHiddenFile.isHiddenFile(entryPath)) continue
-                                            } catch {
-                                                // Ignore errors from this library, it occasionally
-                                                // fails on windows due to native library loading
-                                                // issues.
-                                            }
                                             const stat = await fs.stat(entryPath)
                                             const attributes: Attributes = {
                                                 byteSize: stat.size,
@@ -470,3 +464,21 @@ function extractProjectMetadata(yamlObj: unknown, jsonObj: unknown): ProjectMeta
         }
     }
 }
+
+/**
+ * Checks if the provided path should be hidden.
+ *
+ * On Windows, files that start with the dot but don't have the hidden property
+ * should also be hidden.
+ */
+function isHidden(filePath: string): boolean {
+    const dotfile = /(^|\/)\.[^/.]/g
+    try {
+        return isHiddenFile.isHiddenFile(filePath) || dotfile.test(filePath)
+    } catch {
+        // is-hidden-file library occasionally
+        // fails on Windows due to native library loading
+        // issues. Fallback to the filename check.
+        return dotfile.test(filePath)
+    }
+}

lib/scala/project-manager/src/main/scala/org/enso/projectmanager/boot/command/filesystem/FileSystemListCommand.scala

@@ -58,6 +58,17 @@ object FileSystemListCommand {
   private def filterNotHidden(
     entries: Seq[FileSystemEntry]
   ): Seq[FileSystemEntry] =
-    entries.filterNot(_.path.isHidden)
+    entries.filterNot(isHidden)
 
+  /** Checks whether the provided entry is hidden.
+    *
+    * On Windows, files that start with the dot but don't have the hidden
+    * property should also be hidden.
+    *
+    * @param entry the file system entry
+    * @return `true` if the entry is hidden
+    */
+  private def isHidden(entry: FileSystemEntry): Boolean = {
+    entry.path.isHidden || entry.path.getName.startsWith(".")
+  }
 }