Ole Begemann

Hi, I’m Ole. I’m a developer from Berlin and co-author of Advanced Swift. Here, I mainly write about Swift and app development on Apple platforms. More about me.

1. Use 'git mv' to record filename case changes in Git

   If you’re on a case-insensitive a file system and change the case of a filename, Git will not record the new name — unless you use git mv to perform the renaming. More >

   December 16, 2025

2. Tracking renamed files in Git

   I used to think git mv was unnecessary, but using it right helps preserve a file’s Git history across renames. More >

   December 15, 2025

3. Building with nightly Swift toolchains on macOS

   An overview of the various options you have for selecting the Swift toolchain you want to build with, and two caveats to be aware of. More >

   March 5, 2024

4. How the Swift compiler knows that DispatchQueue.main implies @MainActor

   I found the place in the compiler’s source code where it applies a special attribute to DispatchQueue.main.async closures. Plus, a rant about how Xcode presents Swift concurrency context to the programmer. More >

   February 29, 2024

5. How the relative size modifier interacts with stack views

   The relative sizing modifier interacts in an interesting way with stack views and other containers that distribute the available space among their children. Understanding why can teach us a lot about SwiftUI’s layout algorithm. More >

   March 24, 2023