add desktop.docker.com connect detect function

install.sh

@@ -27,22 +27,50 @@ getCpuType () {
     return 2    #默认为苹果芯片
 }
 
+detectDomainCanConnect () {
+    domain=$1
+    if [ -z "${domain}" ]; then
+        echo "Usage: detectDomainCanConnect domain"
+        exit 1
+    fi
+
+    ping_res=`ping -c 3 "${domain}"`
+    if [[ $ping_res == *"100.0% packet loss"* ]]; then
+    	return 0
+    fi
+
+    return 1
+}
+
+#参数：connect_res，可选值：[0, 1]
 getDockerDesktopDownloadUrl () {
     getCpuType
     cup_type=$?
-	#原网址：https://desktop.docker.com/mac/main/arm64/Docker.dmg
+
+    dmgLink_docker="https://desktop.docker.com/mac/main/arm64/Docker.dmg"
     dmgLink="https://static.jialuoma.cn/docker_desktop/arm64.dmg"
 
     if [ $cup_type -eq 1 ]; then
-		#原网址：https://desktop.docker.com/mac/main/amd64/Docker.dmg
+        dmgLink_docker="https://desktop.docker.com/mac/main/amd64/Docker.dmg"
         dmgLink="https://static.jialuoma.cn/docker_desktop/amd64.dmg"
     fi
 
+    connect_res=$1
+    if [ $connect_res -eq 0 ]; then
 	    echo "${dmgLink}"
+    else
+        #原网址
+    	echo "${dmgLink_docker}"
+    fi
 }
 
 downloadDockerDesktop () {
     link=$1
+    if [ -z "${link}" ]; then
+        echo "Usage: downloadDockerDesktop url"
+        exit 1
+    fi
+
     echo "docker desktop下载链接：${link}"
     echo "即将在浏览器中打开docker desktop的下载链接并开始下载"
     echo "请在docker desktop下载完成后，双击打开安装"
@@ -53,9 +81,14 @@ downloadDockerDesktop () {
     echo "正在为你安装machete镜像..."
 }
 
-# 测试代码
+
+# 安装docker desktop和machete
 welcome
 getCpuInfo
 getCpuType
-link=`getDockerDesktopDownloadUrl`
+detect_domain='https://desktop.docker.com'
+echo "正在检测是否能连接[${detect_domain}]，请稍后..."
+detectDomainCanConnect "${detect_domain}"
+connect_res=$?
+link=`getDockerDesktopDownloadUrl $connect_res`
 downloadDockerDesktop "${link}"