refactor: show command help message. (#1486)

cmd/admin.go

@@ -8,10 +8,10 @@ package cmd
 import (
 	"fmt"
 
-	"github.com/urfave/cli"
-
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/setting"
+
+	"github.com/urfave/cli"
 )
 
 var (

cmd/dump.go

@@ -16,6 +16,7 @@ import (
 
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/setting"
+
 	"github.com/Unknwon/cae/zip"
 	"github.com/Unknwon/com"
 	"github.com/urfave/cli"

cmd/serv.go

@@ -17,6 +17,7 @@ import (
 	"code.gitea.io/gitea/models"
 	"code.gitea.io/gitea/modules/log"
 	"code.gitea.io/gitea/modules/setting"
+
 	"github.com/Unknwon/com"
 	"github.com/dgrijalva/jwt-go"
 	"github.com/urfave/cli"
@@ -105,7 +106,8 @@ func runServ(c *cli.Context) error {
 	}
 
 	if len(c.Args()) < 1 {
-		fail("Not enough arguments", "Not enough arguments")
+		cli.ShowSubcommandHelp(c)
+		return nil
 	}
 
 	cmd := os.Getenv("SSH_ORIGINAL_COMMAND")

cmd/web_graceful.go

@@ -11,6 +11,7 @@ import (
 	"net/http"
 
 	"code.gitea.io/gitea/modules/log"
+
 	"github.com/facebookgo/grace/gracehttp"
 )