swift

a287e2ae - [SourceKit] Check if the realpath of a module is inside the SDK to decide if it's system

[SourceKit] Check if the realpath of a module is inside the SDK to decide if it's system On Windows, we run into the following situation when running SourceKit-LSP tests: - The SDK is located at `S:\Program Files\Swift\Platforms\Windows.platform\Developer\SDKs\Windows.sdk` with `S:` being a substitution drive - We find `Swift.swiftmodule` at `S:\Program Files\Swift\Platforms\Windows.platform\Developer\SDKs\Windows.sdk\usr\lib\swift\windows\Swift.swiftmodule` - Now, to check if `Swift.swiftmodule` is a system module, we take the realpath of the SDK, which resolves the substitution drive an results in something like `C:\Users\alex\src\Program Files\Swift\Platforms\Windows.platform\Developer\SDKs\Windows.sdk` - Since we don’t take the realpath of `Swift.swiftmodule`, we will assume that it’s not in the SDK, because the SDK’s path is on `C:` while `Swift.swiftmodule` lives on `S:` To fix this, we also need to check if a module’s real path is inside the SDK. Fixes swiftlang/sourcekit-lsp#1770 rdar://138210224