Add a Swift Package Manager manifest for React Native SPM apps

CodePush.podspec

@@ -15,7 +15,7 @@ Pod::Spec.new do |s|
   s.preserve_paths = '*.js'
   s.libraries      = 'z', 'bz2'
   s.source_files = [
-    'ios/CodePush/*.{h,m,swift}',
+    'ios/CodePush/*.{h,m}',
     'ios/CodePushCore/Sources/CodePushCore/**/*.swift',
     'shared/diffpatch/*.{c,h}',
     'shared/third_party/hdiffpatch/libHDiffPatch/HPatch/patch.{c,h}',

Package.swift

@@ -0,0 +1,77 @@
+// swift-tools-version:5.9
+import PackageDescription
+
+// How this package finds React Native's header products (ReactHeaders etc.).
+//
+// `react-native spm scaffold` emits this same path, and react-native-screens, reanimated and
+// Sentry ship this same pattern.
+// RN generates these products in a local package inside each app, at
+// <app>/ios/build/xcframeworks, and gives a hand-written manifest no way to locate the app. The
+// path works because the autolinker loads this manifest through a symlink at
+// <app>/ios/build/generated/autolinking/libs/CodePush, and SwiftPM resolves relative paths from
+// that symlink, not from node_modules. Shipping no manifest is not an option: the autolinker
+// rejects a dependency without one.
+//
+// It breaks in remote mode (RN_SPM_REMOTE_URL) and with a custom `--xcframeworks-path`.
+// RN's documented contract for hand-written manifests is a remote package dependency instead,
+// which RN doesn't publish as of 0.88:
+// https://github.com/react/react-native/blob/v0.88.0/packages/react-native/scripts/spm/__docs__/spm-header-paths-contract.md#hand-authored-community-library-contract
+let reactNativePackagePath = "../../../../xcframeworks"
+
+let package = Package(
+    name: "CodePush",
+    platforms: [
+        .iOS("15.5"),
+        .tvOS("15.5"),
+    ],
+    products: [
+        .library(name: "CodePush", targets: ["CodePush"]),
+    ],
+    dependencies: [
+        .package(name: "ReactNative", path: reactNativePackagePath),
+        .package(url: "https://github.com/ZipArchive/ZipArchive", .upToNextMinor(from: "2.5.5")),
+    ],
+    targets: [
+        .target(
+            name: "CodePush",
+            dependencies: [
+                "CodePushCore",
+                "CodePushHDiffPatch",
+                .product(name: "ZipArchive", package: "ZipArchive"),
+                .product(name: "ReactHeaders", package: "ReactNative"),
+                .product(name: "ReactNativeHeaders", package: "ReactNative"),
+                .product(name: "ReactNativeDependenciesHeaders", package: "ReactNative"),
+            ],
+            path: "ios/CodePush",
+            publicHeadersPath: "include"
+        ),
+        .target(
+            name: "CodePushCore",
+            path: "ios/CodePushCore/Sources/CodePushCore"
+        ),
+        .target(
+            name: "CodePushHDiffPatch",
+            path: "shared",
+            sources: [
+                "diffpatch/bspatch_bridge.c",
+                "third_party/hdiffpatch/libHDiffPatch/HPatch/patch.c",
+                "third_party/hdiffpatch/bsdiff_wrapper/bspatch_wrapper.c",
+                "third_party/hdiffpatch/file_for_patch.c",
+            ],
+            publicHeadersPath: "diffpatch",
+            cSettings: [
+                // Keep in sync with CodePush.podspec and android/app/src/main/cpp/CMakeLists.txt.
+                .define("_IS_NEED_BLOCK_DEV", to: "0"),
+                .define("_IS_USED_MULTITHREAD", to: "0"),
+                .define("_IS_NEED_DIR_DIFF_PATCH", to: "0"),
+                .headerSearchPath("."),
+                .headerSearchPath("third_party/hdiffpatch"),
+                .headerSearchPath("third_party/hdiffpatch/libHDiffPatch/HPatch"),
+            ],
+            linkerSettings: [
+                .linkedLibrary("z"),
+                .linkedLibrary("bz2"),
+            ]
+        ),
+    ]
+)

ios/CodePush/CodePushPackage.m

@@ -2,7 +2,11 @@
 #import "CodePushDiffManifest.h"
 #import "CodePushErrorUtils.h"
 #import "CodePushBinaryDiffPatcher.h"
+#if SWIFT_PACKAGE
+@import ZipArchive;
+#else
 #import <SSZipArchive/SSZipArchive.h>
+#endif
 
 @implementation CodePushPackage
 

ios/CodePush/CodePushUpdateUtils.m

@@ -2,9 +2,11 @@
 #import "CodePushErrorUtils.h"
 #import "CodePushSha256.h"
 
-// Cocoapods static library vs framework interop: the generated header lives at a different
-// path depending on whether the pod is built as a static library or as a framework.
-#if __has_include(<CodePush/CodePush-Swift.h>)
+// SwiftPM builds the Swift sources as a separate module. In CocoaPods they are part of the
+// CodePush module, and the generated header path depends on static library vs framework linkage.
+#if SWIFT_PACKAGE
+@import CodePushCore;
+#elif __has_include(<CodePush/CodePush-Swift.h>)
 #import <CodePush/CodePush-Swift.h>
 #else
 #import "CodePush-Swift.h"

ios/CodePush/include/CodePush/CodePush.h

@@ -0,0 +1,3 @@
+// SwiftPM exposes only include/ to dependents, so this gives them `#import <CodePush/CodePush.h>`.
+// SwiftPM also generates the CodePush module map from this umbrella header.
+#import "../../CodePush.h"

package.json

@@ -64,6 +64,9 @@
     "type": "git",
     "url": "https://github.com/bitrise-io/react-native-code-push"
   },
+  "swiftpmConfig": {
+    "name": "CodePush"
+  },
   "dependencies": {
     "hoist-non-react-statics": "^3.3.2"
   },