new 3rdparty/sparkle example

internal/examples/3rdparty/sparkle/darwin/Contents/Info.plist

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+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>CFBundleExecutable</key>
+	<string>sparkle</string>
+	<key>CFBundleGetInfoString</key>
+	<string>Created by Qt/QMake</string>
+	<key>CFBundleIconFile</key>
+	<string>sparkle.icns</string>
+	<key>CFBundleIdentifier</key>
+	<string>com.yourcompany.sparkle</string>
+	<key>CFBundleName</key>
+	<string>sparkle</string>
+	<key>CFBundlePackageType</key>
+	<string>APPL</string>
+	<key>CFBundleShortVersionString</key>
+	<string>1.0.0</string>
+	<key>CFBundleSignature</key>
+	<string>????</string>
+	<key>LSMinimumSystemVersion</key>
+	<string>10.11</string>
+	<key>NOTE</key>
+	<string>This file was generated by Qt/QMake.</string>
+	<key>NSPrincipalClass</key>
+	<string>NSApplication</string>
+	<key>NSHighResolutionCapable</key>
+	<true/>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<true/>
+	<key>SUFeedURL</key>
+	<string>https://example.com/appcast.xml</string>
+	<key>SUPublicEDKey</key>
+	<string>someBase64Key</string>
+</dict>
+</plist>

internal/examples/3rdparty/sparkle/init.sh

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+#!/bin/bash
+
+set -ev
+
+mkdir -p ./darwin/Contents/Frameworks
+curl -sL https://github.com/sparkle-project/Sparkle/releases/download/1.21.0/Sparkle-1.21.0.tar.bz2 | tar -C ./darwin/Contents/Frameworks -x Sparkle.framework

internal/examples/3rdparty/sparkle/main.go

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+package main
+
+import (
+	"os"
+
+	"github.com/therecipe/qt/widgets"
+)
+
+func main() {
+	widgets.NewQApplication(len(os.Args), os.Args)
+
+	button := widgets.NewQPushButton2("check for updates", nil)
+	button.ConnectClicked(func(bool) { sparkle_checkUpdates() })
+	button.Show()
+
+	widgets.QApplication_Exec()
+}

internal/examples/3rdparty/sparkle/sparkle.go

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+package main
+
+/*
+#cgo CFLAGS: -I ${SRCDIR}/darwin/Contents/Frameworks/Sparkle.framework
+#cgo LDFLAGS: -F ${SRCDIR}/darwin/Contents/Frameworks -framework Sparkle
+
+void sparkle_checkUpdates();
+*/
+import "C"
+
+func sparkle_checkUpdates() { C.sparkle_checkUpdates() }

internal/examples/3rdparty/sparkle/sparkle.m

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+#import <Headers/SUUpdater.h>
+
+static SUUpdater* updater = nil;
+
+void sparkle_checkUpdates()
+{
+	if (!updater)
+		updater = [[SUUpdater sharedUpdater] retain];
+
+	[updater setUpdateCheckInterval:3600];
+	[updater checkForUpdatesInBackground];
+}