SwiftFormat | line tool and Xcode Extension | Code Editor library

NOTE: Adding this script will overwrite your source files as you work on them, which has the annoying side-effect of clearing the undo history. You may wish to add the script to your test target rather than your main target, so that it is invoked only when you run the unit tests, and not every time you build the app. Alternatively, you might want to consider running SwiftFormat in lint mode as part of your normal build, and then running a formatting pass manually, or as part of a less-frequent build target (such as the tests).
If you use Bazel to build your Swift projects and want to ensure that only properly formatted code is merged to your main branch, try rules_swiftformat. The repository contains Bazel rules and macros that format Swift source files using SwiftFormat, test that the formatted files exist in the workspace directory, and copy the formatted files to the workspace directory.