You’ve asked for explanations of several commands commonly used in the context of managing and resetting the development environment for Xcode on macOS. Let’s dissect each command to understand its purpose and function:
• Purpose: This command removes all files and directories within the DerivedData folder.
• Function: DerivedData contains build outputs, such as intermediate build information and products. Clearing this can resolve issues caused by stale or corrupt builds.
• Purpose: This command forcibly quits the Xcode application.
• Function: Useful for ensuring that no instances of Xcode are running before performing tasks that require Xcode to be closed, such as cleaning build directories or resetting the development environment.
• Purpose: This command clears the Xcode build system’s cache.
• Function: Helps in resolving issues with the toolchain or build system by removing cached data that may be outdated or corrupted.
• Purpose: Cleans the build files of all targets in the project.
• Function: Similar to cleaning from within Xcode’s interface, this command is often used in scripts to automate cleaning processes.
• Purpose: Removes the Clang module cache directory.
• Function: Clang uses this cache to store pre-compiled header files, which can sometimes cause compilation issues if they become corrupted.
• Purpose: This command is a specific variant targeting a user-specific Clang module cache directory.
• Function: It serves the same purpose as the previous command but is scoped to the current user’s module cache.