OUTLINE view shows "No symbols found in document" for Swift files in Xcode projects

[tanachiu]

Describe the bug
The OUTLINE view in VS Code displays "No symbols found in document" when opening
Swift files within an Xcode project.

• This issue does not occur with Swift files outside of .xcodeproj contexts.
• This issue started occurring in extension version 2.4.0, whereas version 2.2.0 worked as expected.
• It's possible this is related to the Remote - SSH extension, but I haven't yet verified if
  the problem persists when running VS Code directly on the macOS machine.

To Reproduce
Steps to reproduce the behavior:

1. On the remote macOS machine:
   a. Launch Xcode.
   b. Create a new iOS App project. (e.g., "MyTestApp")
   c. Build the app. (Product > Build)
2. On the local Windows PC:
   a. Connect to the macOS machine via Remote -SSH.
   b. Open the Xcode project folder. (e.g., MyTestApp)
   c. Select ContentView.swift.
   d. Open the OUTLINE view in the EXPLORER sidebar.

Expected behavior
The OUTLINE view should display symbols present in ContentView.swift, such as ContentView and body.

Environment

• OS:
  • Remote: macOS 15.5
  • Local: Windows 11 Pro 24H2 26100.4349 (local)
• Swift version
  • swift-driver version: 1.120.5 Apple Swift version 6.1.2 (swiftlang-6.1.2.1.2 clang-1700.0.13.5)
  • Target: arm64-apple-macosx15.0
• Visual Studio Code version: 1.100.3
• vscode-swift version: 2.4.0

[plemarquand]

Hi, the extension only works with Swift Package Manager based projects. These projects will have a Package.swift in the root folder. This isn't immediately made clear from the documentation, so I've opened #1637 to clarify.

[tanachiu]

Hi,

Thank you for the clarification!

I wasn't aware the extension only works well with Swift Package Manager-based projects. I've been using this extension for about six months now, and it had been working fine with Xcode projects until recently, so I didn't realize it was designed specifically for SPM projects.

I think addressing this in #1637 will help reduce similar misunderstandings for others. Thanks!