Clean up scripts, generate bindings from same Gir files every time

.gitmodules

@@ -0,0 +1,3 @@
+[submodule "Sources/GtkCodeGen/GirFiles"]
+	path = Sources/GtkCodeGen/GirFiles
+	url = https://github.com/moreSwift/gir-files

CONTRIBUTING.md

@@ -27,15 +27,25 @@ Due to limitations of Swift Package Manager and the way this project is structur
 2. Make sure that you haven't introduced any new warnings
 3. Make sure that the code builds, and the example works correctly
 4. If you are adding a new feature, consider adding an example usage of it to the example
-5. Run `format_and_lint.sh` (requires installing `swift-format` and `swiftlint`)
+5. Run `./Scripts/format_and_lint.sh` (requires installing `swift-format` and `swiftlint`)
 
 ## While coding
 
 Here are a few things to keep in mind while working on the code.
 
 1. Do not directly modify a file that has a corresponding `.gyb` template file (which will be in the
-   same directory). Instead, modify the template file and then run `./generate.sh` to build all of
-   the templates. To learn more about gyb [read this post](https://nshipster.com/swift-gyb/)
+   same directory). Instead, modify the template file and then run `./Scripts/generate_gyb.sh`
+   to build all of the templates. To learn more about gyb
+   [read this post](https://nshipster.com/swift-gyb/)
+2. Do not directly modify files in `Sources/Gtk/Generated` or `Sources/Gtk3/Generated`. Update the
+   generator at `Sources/GtkCodeGen` instead and run `./Scripts/generate_gtk.sh` to regenerate the
+   Gtk 3 and Gtk 4 bindings. If the changes can not be made by updating the generator, pull the
+   target file out of `Sources/{Gtk,Gtk3}/Generated` and into `Sources/{Gtk,Gtk3}/Widgets` and
+   modify it however you want. Remember to remove the class from `allowListedClasses`,
+   `gtk3AllowListedClasses` or `gtk4AllowListedClasses` so that it doesn't get regenerated the
+   next time someone runs `./Scripts/generate_gtk.sh`. Alternatively, if possible, add
+   code to the generated classes via extensions outside of the Generated directories. I usually
+   name these extension files `ClassName+ManualAdditions.swift`.
 3. Make sure to avoid massive monolithic commits where possible
 
 ## Codestyle

Package.swift

@@ -229,7 +229,8 @@ let package = Package(
             name: "GtkCodeGen",
             dependencies: [
                 "XMLCoder", .product(name: "SwiftSyntaxBuilder", package: "swift-syntax"),
-            ]
+            ],
+            exclude: ["GirFiles"]
         ),
         .systemLibrary(
             name: "CGtk3",

Scripts/format.sh

@@ -0,0 +1,9 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"/../
+
+if [ -z "$1" ]; then
+  swift format format --in-place --recursive --configuration .swift-format Sources Examples/Sources
+else
+  swift format format --in-place --recursive --configuration .swift-format $1
+fi

Scripts/format_and_lint.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"/../
+
+./Scripts/format.sh
+swiftlint lint --quiet

Scripts/generate.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"
+
+./generate_gyb.sh
+
+./generate_gtk.sh

Scripts/generate_gtk.sh

@@ -0,0 +1,6 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"
+
+./generate_gtk4.sh
+./generate_gtk3.sh

Scripts/generate_gtk3.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"/../
+
+# Generate Gtk3 wrapper
+swift run GtkCodeGen Sources/GtkCodeGen/GirFiles/Gtk-3.0.gir Sources/Gtk3/Generated CGtk3
+./Scripts/format.sh Sources/Gtk3/Generated

Scripts/generate_gtk4.sh

@@ -0,0 +1,7 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"/../
+
+# Generate Gtk4 wrapper
+swift run GtkCodeGen Sources/GtkCodeGen/GirFiles/Gtk-4.0.gir Sources/Gtk/Generated CGtk
+./Scripts/format.sh Sources/Gtk/Generated

Scripts/generate_gyb.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+
+cd "$(dirname "$0")"/../
+
+# Find and compile all *.gyb files in the Sources directory
+find Sources -name '*.gyb' |
+  while read file; do
+    ./gyb/gyb --line-directive '' -o "$PWD/${file%.gyb}" "$PWD/$file"
+    ./Scripts/format.sh $PWD/${file%.gyb}
+  done

test.sh → Scripts/test.sh

@@ -1,4 +1,7 @@
 #!/bin/sh
+
+cd "$(dirname "$0")"/../
+
 # `swift test` builds all targets in the package (even those not depended upon
 # by any test targets), which leads to `swift test` on its own being broken
 # for SwiftCrossUI

Sources/AppKitBackend/AppKitBackend.swift

@@ -158,7 +158,7 @@ public final class AppKitBackend: AppBackend {
                         keyEquivalent: ""
                     )
                     renderedItem.isOn = value
-                    
+
                     let wrappedAction = Action {
                         onChange(!renderedItem.isOn)
                     }

Sources/SwiftCrossUI/Views/ForEach.swift

@@ -437,10 +437,13 @@ class ForEachViewChildren<
     }
 }
 
-
 extension ForEach where ID == Int {
     /// Creates a view that creates child views on demand based on a collection of data.
-    @available(*, deprecated, renamed: "init(_:id:_:)", message: "ForEach requires an explicit 'id' parameter for non-Identifiable elements to correctly persist state across view updates")
+    @available(
+        *, deprecated, renamed: "init(_:id:_:)",
+        message:
+            "ForEach requires an explicit 'id' parameter for non-Identifiable elements to correctly persist state across view updates"
+    )
     @_disfavoredOverload
     public init(
         _ elements: Items,
@@ -457,7 +460,8 @@ extension ForEach where Child == [MenuItem], ID == Int {
     @available(
         *,
         deprecated,
-        message: "ForEach requires an explicit 'id' parameter for non-Identifiable elements to correctly persist state across view updates"
+        message:
+            "ForEach requires an explicit 'id' parameter for non-Identifiable elements to correctly persist state across view updates"
     )
     @_disfavoredOverload
     public init(