Exclude Epoxy directory from SwiftFormat analysis (#625)

.swiftformat

@@ -1,5 +1,5 @@
 # Don't format
---exclude .build
+--exclude .build,UI/UIx/SwiftUI/Epoxy
 
 # Options
 

UI/UIx/SwiftUI/Epoxy/DataIDProviding.swift

@@ -1,17 +1,57 @@
-// From: https://github.com/airbnb/epoxy-ios/blob/ecee1ace58d58e3cc918a2dea28095de713b1112
-
 // Created by eric_horacek on 12/1/20.
 // Copyright © 2020 Airbnb Inc. All rights reserved.
 
+// MARK: - DataIDProviding
+
+/// The capability of providing a stable data identifier with an erased type.
+///
+/// While it has similar semantics, this type cannot inherit from `Identifiable` as this would give
+/// it an associated type, which would cause the `keyPath` used in its `EpoxyModelProperty` to not
+/// be stable across types if written as `\Self.dataID` since the `KeyPath` `Root` would be
+/// different for each type.
+///
+/// - SeeAlso: `Identifiable`.
+public protocol DataIDProviding {
+  /// A stable identifier that uniquely identifies this instance, with its typed erased.
+  ///
+  /// Defaults to `DefaultDataID.noneProvided` if no data ID is provided.
+  var dataID: AnyHashable { get }
+}
+
+// MARK: - EpoxyModeled
+
+extension EpoxyModeled where Self: DataIDProviding {
+
+  // MARK: Public
+
+  /// A stable identifier that uniquely identifies this model, with its typed erased.
+  public var dataID: AnyHashable {
+    get { self[dataIDProperty] }
+    set { self[dataIDProperty] = newValue }
+  }
+
+  /// Returns a copy of this model with the ID replaced with the provided ID.
+  public func dataID(_ value: AnyHashable) -> Self {
+    copy(updating: dataIDProperty, to: value)
+  }
+
+  // MARK: Private
+
+  private var dataIDProperty: EpoxyModelProperty<AnyHashable> {
+    EpoxyModelProperty(
+      keyPath: \DataIDProviding.dataID,
+      defaultValue: DefaultDataID.noneProvided,
+      updateStrategy: .replace)
+  }
+}
+
 // MARK: - DefaultDataID
 
 /// The default data ID when none is provided.
 public enum DefaultDataID: Hashable, CustomDebugStringConvertible {
-    case noneProvided
-
-    // MARK: Public
+  case noneProvided
 
-    public var debugDescription: String {
-        "DefaultDataID.noneProvided"
-    }
+  public var debugDescription: String {
+    "DefaultDataID.noneProvided"
+  }
 }

UI/UIx/SwiftUI/Epoxy/EpoxyIntrinsicContentSizeInvalidator.swift

@@ -1,5 +1,3 @@
-// From: https://github.com/airbnb/epoxy-ios/blob/ecee1ace58d58e3cc918a2dea28095de713b1112
-
 // Created by matthew_cheok on 11/19/21.
 // Copyright © 2021 Airbnb Inc. All rights reserved.
 
@@ -21,29 +19,25 @@ import SwiftUI
 /// }
 /// ```
 public struct EpoxyIntrinsicContentSizeInvalidator {
-    // MARK: Public
-
-    public func callAsFunction() {
-        invalidate()
-    }
-
-    // MARK: Internal
+  let invalidate: () -> Void
 
-    let invalidate: () -> Void
+  public func callAsFunction() {
+    invalidate()
+  }
 }
 
 // MARK: - EnvironmentValues
 
 extension EnvironmentValues {
-    /// A means of invalidating the intrinsic content size of the parent `EpoxySwiftUIHostingView`.
-    public var epoxyIntrinsicContentSizeInvalidator: EpoxyIntrinsicContentSizeInvalidator {
-        get { self[EpoxyIntrinsicContentSizeInvalidatorKey.self] }
-        set { self[EpoxyIntrinsicContentSizeInvalidatorKey.self] = newValue }
-    }
+  /// A means of invalidating the intrinsic content size of the parent `EpoxySwiftUIHostingView`.
+  public var epoxyIntrinsicContentSizeInvalidator: EpoxyIntrinsicContentSizeInvalidator {
+    get { self[EpoxyIntrinsicContentSizeInvalidatorKey.self] }
+    set { self[EpoxyIntrinsicContentSizeInvalidatorKey.self] = newValue }
+  }
 }
 
 // MARK: - EpoxyIntrinsicContentSizeInvalidatorKey
 
 private struct EpoxyIntrinsicContentSizeInvalidatorKey: EnvironmentKey {
-    static let defaultValue = EpoxyIntrinsicContentSizeInvalidator(invalidate: { })
+  static let defaultValue = EpoxyIntrinsicContentSizeInvalidator(invalidate: { })
 }

UI/UIx/SwiftUI/Epoxy/EpoxySwiftUIHostingController.swift

@@ -1,55 +1,45 @@
-// From: https://github.com/airbnb/epoxy-ios/blob/ecee1ace58d58e3cc918a2dea28095de713b1112
-
 // Created by eric_horacek on 10/8/21.
 // Copyright © 2021 Airbnb Inc. All rights reserved.
 
 import SwiftUI
 
 #if !os(macOS)
-
-    // MARK: - EpoxySwiftUIUIHostingController
-
-    /// A `UIHostingController` that hosts SwiftUI views within an Epoxy container, e.g. an Epoxy
-    /// `CollectionView`.
-    ///
-    /// Exposed publicly to allow consumers to reason about these view controllers, e.g. to opt
-    /// collection view cells out of automated view controller impression tracking.
-    ///
-    /// - SeeAlso: `EpoxySwiftUIHostingView`
-    open class EpoxySwiftUIHostingController<Content: View>: UIHostingController<Content> {
-        // MARK: Lifecycle
-
-        /// Creates a `UIHostingController` that optionally ignores the `safeAreaInsets` when laying out
-        /// its contained `RootView`.
-        public convenience init(rootView: Content, ignoreSafeArea: Bool) {
-            self.init(rootView: rootView)
-
-            clearBackground()
-
-            // We unfortunately need to call a private API to disable the safe area. We can also accomplish
-            // this by dynamically subclassing this view controller's view at runtime and overriding its
-            // `safeAreaInsets` property and returning `.zero`. An implementation of that logic is
-            // available in this file in the `2d28b3181cca50b89618b54836f7a9b6e36ea78e` commit if this API
-            // no longer functions in future SwiftUI versions.
-            _disableSafeArea = ignoreSafeArea
-        }
-
-        // MARK: Open
-
-        override open func viewDidLoad() {
-            super.viewDidLoad()
-
-            clearBackground()
-        }
-
-        // MARK: Internal
-
-        func clearBackground() {
-            // A `UIHostingController` has a system background color by default as it's typically used in
-            // full-screen use cases. Since we're using this view controller to place SwiftUI views within
-            // other view controllers we default the background color to clear so we can see the views
-            // below, e.g. to draw highlight states in a `CollectionView`.
-            view.backgroundColor = .clear
-        }
-    }
+// MARK: - EpoxySwiftUIUIHostingController
+
+/// A `UIHostingController` that hosts SwiftUI views within an Epoxy container, e.g. an Epoxy
+/// `CollectionView`.
+///
+/// Exposed publicly to allow consumers to reason about these view controllers, e.g. to opt
+/// collection view cells out of automated view controller impression tracking.
+///
+/// - SeeAlso: `EpoxySwiftUIHostingView`
+open class EpoxySwiftUIHostingController<Content: View>: UIHostingController<Content> {
+
+  // MARK: Lifecycle
+
+  /// Creates a `UIHostingController` that optionally ignores the `safeAreaInsets` when laying out
+  /// its contained `RootView`.
+  public convenience init(rootView: Content, ignoreSafeArea: Bool) {
+    self.init(rootView: rootView)
+
+    // We unfortunately need to call a private API to disable the safe area. We can also accomplish
+    // this by dynamically subclassing this view controller's view at runtime and overriding its
+    // `safeAreaInsets` property and returning `.zero`. An implementation of that logic is
+    // available in this file in the `2d28b3181cca50b89618b54836f7a9b6e36ea78e` commit if this API
+    // no longer functions in future SwiftUI versions.
+    _disableSafeArea = ignoreSafeArea
+  }
+
+  // MARK: Open
+
+  open override func viewDidLoad() {
+    super.viewDidLoad()
+
+    // A `UIHostingController` has a system background color by default as it's typically used in
+    // full-screen use cases. Since we're using this view controller to place SwiftUI views within
+    // other view controllers we default the background color to clear so we can see the views
+    // below, e.g. to draw highlight states in a `CollectionView`.
+    view.backgroundColor = .clear
+  }
+}
 #endif