Ability To Turn Off Formatting For Subdirectory

[samdeane]

I have a .swift-format file at the root of my repo, but some third-party code in a sub-directory. I'd like to be able to disable formatting for the subdirectory.

There are a couple of ways that this could be accomplished

• a setting in .swift-format with a pattern or patterns for paths to be excluded from formatting
• detecting the presence of a file .no-swift-format and disabling formatting anywhere below that file in the tree

The former case is useful, but would not be sufficient in the situation where you've a submodule with some third-party code, and that submodule has its own .swift-format file. In that situation the module's file would take precedence as it is closest, but you'd want to be able to override it locally without having to make changes to it.

Detecting a .no-swift-format file at the same level would be efficient in this situation, and the file could be added to .gitignore for the module, so that creating it locally would not cause upstream problems.

[samdeane]

See also this thread

[ahoppen]

Synced to Apple’s issue tracker as rdar://139269456

[samdeane]

Have added an untested implementation at #873.

[samdeane]

#873 now tested locally and submitted for review.