Switch to urfave/cli/v2... again.

go.mod

@@ -4,13 +4,13 @@ go 1.13
 
 require (
 	github.com/NYTimes/gziphandler v1.1.1
-	github.com/creack/pty v1.1.7
+	github.com/creack/pty v1.1.11
-	github.com/elazarl/go-bindata-assetfs v1.0.0
+	github.com/elazarl/go-bindata-assetfs v1.0.1
 	github.com/fatih/structs v1.1.0
-	github.com/gorilla/websocket v1.4.1
+	github.com/gorilla/websocket v1.4.2
-	github.com/hashicorp/go-multierror v1.0.0 // indirect
+	github.com/hashicorp/go-multierror v1.1.1 // indirect
 	github.com/pkg/errors v0.9.1
 	github.com/urfave/cli/v2 v2.3.0
 	github.com/yudai/hcl v0.0.0-20151013225006-5fa2393b3552
-	golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae // indirect
+	golang.org/x/sys v0.0.0-20210415045647-66c3f260301c // indirect
 )

go.sum

@@ -44,6 +44,8 @@ golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae h1:/WDfKMnPU+m5M4xB+6x4kaepx
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210412220455-f1c623a9e750 h1:ZBu6861dZq7xBnG1bn5SRU0vA8nx42at4+kP07FMTog=
 golang.org/x/sys v0.0.0-20210412220455-f1c623a9e750/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20210415045647-66c3f260301c h1:6L+uOeS3OQt/f4eFHXZcTxeZrGCuz+CLElgEBjbcTA4=
+golang.org/x/sys v0.0.0-20210415045647-66c3f260301c/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v2 v2.2.3/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=

help.go

@@ -1,19 +0,0 @@
-package main
-
-var helpTemplate = `NAME:
-   {{.Name}} - {{.Usage}}
-
-USAGE:
-   {{.Name}} [options] <command> [<arguments...>]
-
-VERSION:
-   {{.Version}}{{if or .Author .Email}}
-
-AUTHOR:{{if .Author}}
-  {{.Author}}{{if .Email}} - <{{.Email}}>{{end}}{{else}}
-  {{.Email}}{{end}}{{end}}
-
-OPTIONS:
-   {{range .Flags}}{{.}}
-   {{end}}
-`

main.go

@@ -22,10 +22,9 @@ func main() {
 	app.Name = "gotty"
 	app.Version = Version + "+" + CommitID
 	app.Usage = "Share your terminal as a web application"
-	app.HideHelp = true
+	app.HideHelpCommand = true
-	cli.AppHelpTemplate = helpTemplate
-
 	appOptions := &server.Options{}
+
 	if err := utils.ApplyDefaultValues(appOptions); err != nil {
 		exit(err, 1)
 	}

utils/flags.go

@@ -28,8 +28,9 @@ func GenerateFlags(options ...interface{}) (flags []cli.Flag, mappings map[strin
 			mappings[flagName] = field.Name()
 
 			flagShortName := field.Tag("flagSName")
+			var aliases []string
 			if flagShortName != "" {
-				flagName += ", " + flagShortName
+				aliases = []string{flagShortName}
 			}
 
 			flagDescription := field.Tag("flagDescribe")
@@ -41,12 +42,14 @@ func GenerateFlags(options ...interface{}) (flags []cli.Flag, mappings map[strin
 					Value:   field.Value().(string),
 					Usage:   flagDescription,
 					EnvVars: []string{envName},
+					Aliases: aliases,
 				})
 			case reflect.Bool:
 				flags = append(flags, &cli.BoolFlag{
 					Name:    flagName,
 					Usage:   flagDescription,
 					EnvVars: []string{envName},
+					Aliases: aliases,
 				})
 			case reflect.Int:
 				flags = append(flags, &cli.IntFlag{
@@ -54,6 +57,7 @@ func GenerateFlags(options ...interface{}) (flags []cli.Flag, mappings map[strin
 					Value:   field.Value().(int),
 					Usage:   flagDescription,
 					EnvVars: []string{envName},
+					Aliases: aliases,
 				})
 			}
 		}