add sync command

internal/command/sync.go

@@ -35,7 +35,7 @@ func CmdSync() cli.Command {
 		UsageText: cmder.App().Name + " sync",
 		Description: `
 	备份功能。指定本地目录和对应的一个网盘目录，以备份文件。
-	备份功能支持一下三种模式：
+	备份功能支持以下三种模式：
 	1. upload 
        备份本地文件，即上传本地文件到网盘，始终保持本地文件有一个完整的备份在网盘
 	2. download 
@@ -43,61 +43,102 @@ func CmdSync() cli.Command {
 	3. sync 
        双向备份，保持网盘文件和本地文件严格一致
 
-  示例:
-    1. 启动同步备份任务
-    aliyunpan-go sync start
+	请输入以下命令查看如何配置和启动：
+    aliyunpan sync start -h
 `,
 		Category: "阿里云盘",
 		Before:   cmder.ReloadConfigFunc,
 		Action: func(c *cli.Context) error {
-			if config.Config.ActiveUser() == nil {
-				fmt.Println("未登录账号")
-				return nil
-			}
-			dp := c.Int("dp")
-			if dp == 0 {
-				dp = config.Config.MaxDownloadParallel
-			}
-			if dp == 0 {
-				dp = 2
-			}
-
-			up := c.Int("up")
-			if up == 0 {
-				up = config.Config.MaxUploadParallel
-			}
-			if up == 0 {
-				up = 2
-			}
-
-			downloadBlockSize := int64(config.Config.CacheSize)
-			if downloadBlockSize == 0 {
-				downloadBlockSize = int64(256 * 1024)
-			}
-
-			uploadBlockSize := int64(c.Int("ubs") * 1024)
-			if uploadBlockSize == 0 {
-				uploadBlockSize = aliyunpan.DefaultChunkSize
-			}
-
-			RunSync(up, dp, uploadBlockSize, downloadBlockSize)
+			cli.ShowCommandHelp(c, c.Command.Name)
 			return nil
 		},
-		Flags: []cli.Flag{
-			cli.IntFlag{
-				Name:  "dp",
-				Usage: "download parallel, 下载并发数量，即可以同时并发下载多少个文件。0代表跟从配置文件设置（取值范围:1 ~ 10）",
-				Value: 0,
-			},
-			cli.IntFlag{
-				Name:  "up",
-				Usage: "upload parallel, 上传并发数量，即可以同时并发上传多少个文件。0代表跟从配置文件设置（取值范围:1 ~ 10）",
-				Value: 0,
-			},
-			cli.IntFlag{
-				Name:  "ubs",
-				Usage: "upload block size，上传分片大小，单位KB。推荐值：1024 ~ 10240",
-				Value: 10240,
+		Subcommands: []cli.Command{
+			{
+				Name:      "start",
+				Usage:     "启动sync同步备份任务",
+				UsageText: cmder.App().Name + " sync start [arguments...]",
+				Description: `
+使用备份配置文件启动sync同步备份任务。备份配置文件必须存在，不然启动失败。
+同步备份任务的配置文件保存在：(配置目录)/sync_drive/sync_drive_config.json，样例如下：
+{
+ "configVer": "1.0",
+ "syncTaskList": [
+  {
+   "name": "设计文档备份",
+   "localFolderPath": "D:\\tickstep\\Documents\\设计文档",
+   "panFolderPath": "/sync_drive/我的文档",
+   "mode": "upload"
+  }
+ ]
+}
+相关字段说明如下：
+name - 任务名称
+localFolderPath - 本地目录
+panFolderPath - 网盘目录
+mode - 模式: upload(备份本地文件到云盘),download(备份云盘文件到本地),sync(双向同步备份)
+
+	例子:
+	1. 查看帮助
+	aliyunpan sync start -h
+
+	2. 使用默认配置启动同步备份服务
+	aliyunpan sync start
+
+	3. 启动sync服务，并配置下载并发为2，上传并发为1，上传分片大小为1MB
+	aliyunpan sync start -dp 2 -up 1 -ubs 1024
+
+`,
+				Action: func(c *cli.Context) error {
+					if config.Config.ActiveUser() == nil {
+						fmt.Println("未登录账号")
+						return nil
+					}
+					dp := c.Int("dp")
+					if dp == 0 {
+						dp = config.Config.MaxDownloadParallel
+					}
+					if dp == 0 {
+						dp = 2
+					}
+
+					up := c.Int("up")
+					if up == 0 {
+						up = config.Config.MaxUploadParallel
+					}
+					if up == 0 {
+						up = 2
+					}
+
+					downloadBlockSize := int64(config.Config.CacheSize)
+					if downloadBlockSize == 0 {
+						downloadBlockSize = int64(256 * 1024)
+					}
+
+					uploadBlockSize := int64(c.Int("ubs") * 1024)
+					if uploadBlockSize == 0 {
+						uploadBlockSize = aliyunpan.DefaultChunkSize
+					}
+
+					RunSync(dp, up, downloadBlockSize, uploadBlockSize)
+					return nil
+				},
+				Flags: []cli.Flag{
+					cli.IntFlag{
+						Name:  "dp",
+						Usage: "download parallel, 下载并发数量，即可以同时并发下载多少个文件。0代表跟从配置文件设置（取值范围:1 ~ 10）",
+						Value: 0,
+					},
+					cli.IntFlag{
+						Name:  "up",
+						Usage: "upload parallel, 上传并发数量，即可以同时并发上传多少个文件。0代表跟从配置文件设置（取值范围:1 ~ 10）",
+						Value: 0,
+					},
+					cli.IntFlag{
+						Name:  "ubs",
+						Usage: "upload block size，上传分片大小，单位KB。推荐值：1024 ~ 10240",
+						Value: 10240,
+					},
+				},
 			},
 		},
 	}