add cmd 'bee update' to update self

just notice once a day if there is a new version

cmd/bee.go

@@ -31,6 +31,7 @@ import (
 	_ "github.com/beego/bee/cmd/commands/rs"
 	_ "github.com/beego/bee/cmd/commands/run"
 	_ "github.com/beego/bee/cmd/commands/server"
+	_ "github.com/beego/bee/cmd/commands/update"
 	_ "github.com/beego/bee/cmd/commands/version"
 	"github.com/beego/bee/utils"
 )

cmd/commands/command.go

@@ -65,6 +65,7 @@ func (c *Command) Out() io.Writer {
 	if c.output != nil {
 		return *c.output
 	}
+
 	return colors.NewColorWriter(os.Stderr)
 }
 

cmd/commands/update/update.go

@@ -0,0 +1,38 @@
+package update
+
+import (
+	"flag"
+	"os"
+	"os/exec"
+
+	"github.com/beego/bee/cmd/commands"
+	"github.com/beego/bee/config"
+	beeLogger "github.com/beego/bee/logger"
+)
+
+var CmdUpdate = &commands.Command{
+	UsageLine: "update",
+	Short:     "Update Bee",
+	Long: `
+Automatic run command "go get -u github.com/beego/bee" for selfupdate
+`,
+	Run: updateBee,
+}
+
+func init() {
+	fs := flag.NewFlagSet("update", flag.ContinueOnError)
+	CmdUpdate.Flag = *fs
+	commands.AvailableCommands = append(commands.AvailableCommands, CmdUpdate)
+}
+
+func updateBee(cmd *commands.Command, args []string) int {
+	beeLogger.Log.Info("Updating")
+	beePath := config.GitRemotePath
+	cmdUp := exec.Command("go", "get", "-u", beePath)
+	cmdUp.Stdout = os.Stdout
+	cmdUp.Stderr = os.Stderr
+	if err := cmdUp.Run(); err != nil {
+		beeLogger.Log.Warnf("Run cmd err:%s",err)
+	}
+	return 0
+}

cmd/commands/version/version.go

@@ -14,11 +14,13 @@ import (
 	"runtime"
 	"strings"
 
+	"gopkg.in/yaml.v2"
+
 	"github.com/beego/bee/cmd/commands"
+	"github.com/beego/bee/config"
 	beeLogger "github.com/beego/bee/logger"
 	"github.com/beego/bee/logger/colors"
 	"github.com/beego/bee/utils"
-	"gopkg.in/yaml.v2"
 )
 
 const verboseVersionBanner string = `%s%s______
@@ -57,7 +59,7 @@ Prints the current Bee, Beego and Go version alongside the platform information.
 }
 var outputFormat string
 
-const version = "1.12.0"
+const version = config.Version
 
 func init() {
 	fs := flag.NewFlagSet("version", flag.ContinueOnError)