Work around need to use CoreFoundation directly from plutil

Author: parkera

Sources/Foundation/NSNumber.swift

@@ -1150,6 +1150,18 @@ open class NSNumber : NSValue, @unchecked Sendable {
     }
 
     open override var classForCoder: AnyClass { return NSNumber.self }
+    
+    /// Provides a way for `plutil` to know if `CFPropertyList` has returned a literal `true`/`false` value, as opposed to a number which happens to have a value of 1 or 0.
+    @_spi(BooleanCheckingForPLUtil)
+    public var _exactBoolValue: Bool? {
+        if self === kCFBooleanTrue {
+            return true
+        } else if self === kCFBooleanFalse {
+            return false
+        } else {
+            return nil
+        }
+    }
 }
 
 extension CFNumber : _NSBridgeable {

Sources/plutil/CMakeLists.txt

@@ -20,7 +20,6 @@ add_executable(plutil
 	PLULiteralOutput.swift)
 
 target_link_libraries(plutil PRIVATE
-	CoreFoundation
 	Foundation)
 
 set_target_properties(plutil PROPERTIES

Sources/plutil/PLUContext.swift

@@ -10,8 +10,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+@_spi(BooleanCheckingForPLUtil)
 import Foundation
-import CoreFoundation
 
 func help(_ name: String) -> String {
     name +
@@ -275,10 +275,12 @@ extension NSNumber {
     }
 
     var betterSwiftType: BetterSwiftType {
-        if self === kCFBooleanTrue {
-            return .true
-        } else if self === kCFBooleanFalse {
-            return .false
+        if let booleanValue = _exactBoolValue {
+            if booleanValue {
+                return .true
+            } else {
+                return .false
+            }
         }
         switch UInt8(self.objCType.pointee) {
         case UInt8(ascii: "c"), UInt8(ascii: "s"), UInt8(ascii: "i"), UInt8(ascii: "l"), UInt8(ascii: "q"):