fix(server): reveal opens the default Windows file manager

apps/server/src/process/externalLauncher.test.ts

@@ -342,11 +342,12 @@ it.effect("reveals a file in File Explorer through PowerShell on Windows", () =>
     ]);
     const encodedCommand = spawned.args[spawned.args.length - 1] ?? "";
     const decodedCommand = Buffer.from(encodedCommand, "base64").toString("utf16le");
-    // explorer.exe expects `/select,"<path>"` with only the path quoted;
-    // PowerShell 5.1's Start-Process passes the argument string verbatim.
+    // A replacement default file manager gets the containing folder through
+    // the shell. Otherwise explorer.exe expects `/select,"<path>"` with only
+    // the path quoted; PowerShell 5.1's Start-Process passes it verbatim.
     assert.equal(
       decodedCommand,
-      "$ProgressPreference = 'SilentlyContinue'; Start-Process 'explorer.exe' -ArgumentList ('/select,\"' + 'C:\\workspace with spaces\\media\\author''s clip.mp4' + '\"')",
+      "$ProgressPreference = 'SilentlyContinue'; $folderVerb = (Get-ItemProperty -LiteralPath 'Registry::HKEY_CLASSES_ROOT\\Directory\\shell' -ErrorAction SilentlyContinue).'(default)'; if ($folderVerb -and $folderVerb -ne 'none') { Invoke-Item -LiteralPath ([IO.Path]::GetDirectoryName('C:\\workspace with spaces\\media\\author''s clip.mp4')) } else { $ProgressPreference = 'SilentlyContinue'; Start-Process 'explorer.exe' -ArgumentList ('/select,\"' + 'C:\\workspace with spaces\\media\\author''s clip.mp4' + '\"') }",
     );
     assert.equal(spawned.options.shell, false);
   }).pipe(Effect.scoped, Effect.provide(NodeServices.layer)),
@@ -492,7 +493,7 @@ it.effect.skipIf(windowsHost)(
       const decodedCommand = Buffer.from(encodedCommand, "base64").toString("utf16le");
       assert.equal(
         decodedCommand,
-        "$ProgressPreference = 'SilentlyContinue'; Start-Process 'explorer.exe' -ArgumentList ('/select,\"' + '\\\\wsl.localhost\\Ubuntu-24.04\\home\\t3\\workspace\\media\\clip.mp4' + '\"')",
+        "$ProgressPreference = 'SilentlyContinue'; $folderVerb = (Get-ItemProperty -LiteralPath 'Registry::HKEY_CLASSES_ROOT\\Directory\\shell' -ErrorAction SilentlyContinue).'(default)'; if ($folderVerb -and $folderVerb -ne 'none') { Invoke-Item -LiteralPath ([IO.Path]::GetDirectoryName('\\\\wsl.localhost\\Ubuntu-24.04\\home\\t3\\workspace\\media\\clip.mp4')) } else { $ProgressPreference = 'SilentlyContinue'; Start-Process 'explorer.exe' -ArgumentList ('/select,\"' + '\\\\wsl.localhost\\Ubuntu-24.04\\home\\t3\\workspace\\media\\clip.mp4' + '\"') }",
       );
     }).pipe(Effect.scoped, Effect.provide(NodeServices.layer)),
 );

apps/server/src/process/externalLauncher.ts

@@ -599,6 +599,18 @@ export function buildFileExplorerRevealPowerShellSource(
   return `$ProgressPreference = 'SilentlyContinue'; Start-Process ${escapePowerShellStringLiteral(explorerCommand)} -ArgumentList ('/select,"' + ${escapePowerShellStringLiteral(target)} + '"')`;
 }
 
+/**
+ * Keeps reveals in a replacement file manager (File Pilot, Directory Opus,
+ * XYplorer) set as the Windows default. Those register a default verb on
+ * `Directory\shell`, which stock Windows leaves as `none`, and launching
+ * Explorer directly bypasses it. Opening the containing folder through the
+ * shell runs that verb; only Explorer has a selection switch, so the file
+ * itself is not selected there.
+ */
+function buildDefaultFileManagerRevealPowerShellSource(target: string): string {
+  return `$ProgressPreference = 'SilentlyContinue'; $folderVerb = (Get-ItemProperty -LiteralPath 'Registry::HKEY_CLASSES_ROOT\\Directory\\shell' -ErrorAction SilentlyContinue).'(default)'; if ($folderVerb -and $folderVerb -ne 'none') { Invoke-Item -LiteralPath ([IO.Path]::GetDirectoryName(${escapePowerShellStringLiteral(target)})) } else { ${buildFileExplorerRevealPowerShellSource("explorer.exe", target)} }`;
+}
+
 function fileExplorerRevealLaunch(
   target: string,
   explorerTarget: string,
@@ -610,7 +622,7 @@ function fileExplorerRevealLaunch(
     command: powershellCommand,
     args: [
       ...POWERSHELL_ARGUMENTS_PREFIX,
-      encodeUtf16LeBase64(buildFileExplorerRevealPowerShellSource("explorer.exe", explorerTarget)),
+      encodeUtf16LeBase64(buildDefaultFileManagerRevealPowerShellSource(explorerTarget)),
     ],
   };
 }