From cd53bf5bb605300617ab38e2f4a42f23cdd53940 Mon Sep 17 00:00:00 2001
From: Randy Reddig <randy@alta.software>
Date: Wed, 15 Sep 2021 09:27:21 -0700
Subject: [PATCH 1/2] example/swift-package: add Swift Package Manager example

This depends on golang/mobile#70 (golang.org/cl/334689).
---
 example/swift-package/Makefile                | 17 ++++++++++++
 example/swift-package/Package.swift           | 25 +++++++++++++++++
 example/swift-package/README.md               | 13 +++++++++
 example/swift-package/Sources/GetGo/get.go    | 22 +++++++++++++++
 .../swift-package/Sources/GetKit/GetKit.swift |  1 +
 .../Tests/GetKitTests/GetTest.swift           | 27 +++++++++++++++++++
 6 files changed, 105 insertions(+)
 create mode 100644 example/swift-package/Makefile
 create mode 100644 example/swift-package/Package.swift
 create mode 100644 example/swift-package/README.md
 create mode 100644 example/swift-package/Sources/GetGo/get.go
 create mode 100644 example/swift-package/Sources/GetKit/GetKit.swift
 create mode 100644 example/swift-package/Tests/GetKitTests/GetTest.swift

diff --git a/example/swift-package/Makefile b/example/swift-package/Makefile
new file mode 100644
index 000000000..aa108a519
--- /dev/null
+++ b/example/swift-package/Makefile
@@ -0,0 +1,17 @@
+.DEFAULT: build
+
+build: Frameworks $(wildcard Package.*) $(wildcard Sources/*/*)
+	swift build -c release
+
+.PHONY: Frameworks
+Frameworks: Frameworks/GetGo.xcframework
+
+Frameworks/%.xcframework: Makefile $(wildcard Sources/*/*.go) $(shell which gomobile)
+	mkdir -p Frameworks
+	gomobile init
+	gomobile bind -target=ios,iossimulator,macos,maccatalyst -x -o $@ ./Sources/$*
+	touch $@
+
+test: build
+	go test ./...
+	swift test
diff --git a/example/swift-package/Package.swift b/example/swift-package/Package.swift
new file mode 100644
index 000000000..b6d7229b8
--- /dev/null
+++ b/example/swift-package/Package.swift
@@ -0,0 +1,25 @@
+// swift-tools-version:5.3
+import PackageDescription
+
+let package = Package(
+	name: "GetKit",
+	products: [
+		.library(
+			name: "GetKit",
+			targets: ["GetGo"]
+		),
+	],
+	targets: [
+		.target(
+			name: "GetKit"
+		),
+		.binaryTarget(
+			name: "GetGo",
+			path: "Frameworks/GetGo.xcframework"
+		),
+		.testTarget(
+			name: "GetKitTests",
+			dependencies: ["GetKit", "GetGo"]
+		),
+	]
+)
diff --git a/example/swift-package/README.md b/example/swift-package/README.md
new file mode 100644
index 000000000..607d233c7
--- /dev/null
+++ b/example/swift-package/README.md
@@ -0,0 +1,13 @@
+# [gomobile](https://pkg.go.dev/golang.org/x/mobile/cmd/gomobile) + [Swift Package Manager](https://swift.org/package-manager/)
+
+Example [Go](https://golang.org/) package built into an [XCFramework](https://developer.apple.com/documentation/swift_packages/distributing_binary_frameworks_as_swift_packages) for [Swift Package Manager](https://swift.org/package-manager/), targeting iOS, macOS, and macCatalyst targets.
+
+## Requirements
+
+Go 1.16, Swift 5.3, and Xcode 11 or later.
+
+## Usage
+
+To build the XCFramework and Swift package: `make build`
+
+To test: `make test`
diff --git a/example/swift-package/Sources/GetGo/get.go b/example/swift-package/Sources/GetGo/get.go
new file mode 100644
index 000000000..c4c8f42a3
--- /dev/null
+++ b/example/swift-package/Sources/GetGo/get.go
@@ -0,0 +1,22 @@
+package Go
+
+import (
+	"io"
+	"net/http"
+)
+
+// Get makes an HTTP(S) GET request to url,
+// returning the resulting content or an error.
+func Get(url string) ([]byte, error) {
+	res, err := http.Get(url)
+	if err != nil {
+		return nil, err
+	}
+	defer res.Body.Close()
+	return io.ReadAll(res.Body)
+}
+
+// Version returns the version string for this package.
+func Version() string {
+	return "0.0.1"
+}
diff --git a/example/swift-package/Sources/GetKit/GetKit.swift b/example/swift-package/Sources/GetKit/GetKit.swift
new file mode 100644
index 000000000..d2dc7b25e
--- /dev/null
+++ b/example/swift-package/Sources/GetKit/GetKit.swift
@@ -0,0 +1 @@
+// Stub file so Swift Package Manager doesn’t complain
diff --git a/example/swift-package/Tests/GetKitTests/GetTest.swift b/example/swift-package/Tests/GetKitTests/GetTest.swift
new file mode 100644
index 000000000..5332b37c2
--- /dev/null
+++ b/example/swift-package/Tests/GetKitTests/GetTest.swift
@@ -0,0 +1,27 @@
+import XCTest
+
+@testable import GetGo
+
+class GetTests: XCTestCase {
+	func testGet() {
+		var error: NSErrorPointer = nil
+		let response = GoGet("https://golang.org/", error)
+		XCTAssertNil(error)
+		guard let response = response else {
+			XCTFail("response == nil")
+			return
+		}
+		guard let str = String(data: response, encoding: .utf8) else {
+			XCTFail("str == nil")
+			return
+		}
+		XCTAssert(str.contains("Go"))
+		XCTAssert(str.contains("an open source programming language"))
+		XCTAssert(str.contains("https://play.golang.org"))
+	}
+
+	func testVersion() {
+		let version = GoVersion()
+		XCTAssertEqual(version, "0.0.1")
+	}
+}

From fbf25be80d36f4a8e73721f47aae0bba3201fa46 Mon Sep 17 00:00:00 2001
From: Randy Reddig <randy@alta.software>
Date: Wed, 15 Sep 2021 22:09:59 -0700
Subject: [PATCH 2/2] .gitignore: ignore .build directories generated by Swift
 Package Manager

---
 .gitignore | 1 +
 1 file changed, 1 insertion(+)

diff --git a/.gitignore b/.gitignore
index c7abc869b..16cc24a07 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ last-change
 *.iml
 .idea
 .gradle
+.build
 
 # Android Studio build and IDE configuration files.
 example/bind/android/local.properties