Replace headers with silgen (#679)

* Revert "Put back"

This reverts commit 37d791f787.

* Cleanup

Sources/Packages/Package.swift

@@ -22,9 +22,6 @@ let package = Package(
         .library(
             name: "SecretAgentKit",
             targets: ["SecretAgentKit", "XPCWrappers"]),
-        .library(
-            name: "SecretAgentKitHeaders",
-            targets: ["SecretAgentKitHeaders"]),
         .library(
             name: "Brief",
             targets: ["Brief"]),
@@ -60,13 +57,10 @@ let package = Package(
         ),
         .target(
             name: "SecretAgentKit",
-            dependencies: ["SecretKit", "SecretAgentKitHeaders"],
+            dependencies: ["SecretKit"],
             resources: [localization],
             swiftSettings: swiftSettings,
         ),
-        .systemLibrary(
-            name: "SecretAgentKitHeaders",
-        ),
         .testTarget(
             name: "SecretAgentKitTests",
             dependencies: ["SecretAgentKit"],
@@ -83,7 +77,7 @@ let package = Package(
         ),
         .target(
             name: "XPCWrappers",
-            swiftSettings: swiftSettings,
+            swiftSettings: swiftSettings + [.treatWarning("DeprecatedDeclaration", as: .warning)],
         ),
     ]
 )

Sources/Packages/Sources/SecretAgentKit/SigningRequestTracer.swift

@@ -2,7 +2,6 @@ import Foundation
 import AppKit
 import Security
 import SecretKit
-import SecretAgentKitHeaders
 
 /// An object responsible for generating ``SecretKit.SigningRequestProvenance`` objects.
 struct SigningRequestTracer {
@@ -80,3 +79,11 @@ extension SigningRequestTracer {
     }
 
 }
+
+// from libproc.h
+@_silgen_name("proc_pidpath")
+@discardableResult func proc_pidpath(_ pid: Int32, _ buffer: UnsafeMutableRawPointer!, _ buffersize: UInt32) -> Int32
+
+//// from SecTask.h
+@_silgen_name("SecCodeCreateWithPID")
+@discardableResult func SecCodeCreateWithPID(_: Int32, _: SecCSFlags, _: UnsafeMutablePointer<Unmanaged<SecCode>?>!) -> OSStatus

Sources/Packages/Sources/SecretAgentKitHeaders/Stub.swift

@@ -1 +0,0 @@
-

Sources/Packages/Sources/SecretAgentKitHeaders/include/SecretAgentKit.h

@@ -1,19 +0,0 @@
-#import <Foundation/Foundation.h>
-#import <Security/Security.h>
-
-
-// Forward declarations
-
-// from libproc.h
-int proc_pidpath(int pid, void * buffer, uint32_t  buffersize);
-
-// from SecTask.h
-OSStatus SecCodeCreateWithPID(int32_t, SecCSFlags, SecCodeRef *);
-
-//! Project version number for SecretAgentKit.
-FOUNDATION_EXPORT double SecretAgentKitVersionNumber;
-
-//! Project version string for SecretAgentKit.
-FOUNDATION_EXPORT const unsigned char SecretAgentKitVersionString[];
-
-

Sources/Packages/Sources/SecretAgentKitHeaders/module.modulemap

@@ -1,4 +0,0 @@
-module SecretAgentKitHeaders [system] {
-    header "include/SecretAgentKit.h"
-    export *
-}