feat: update command line.

README.md

@@ -2,7 +2,7 @@
 
 # drone-ssh
 
-[![GitHub tag](https://img.shields.io/github/tag/strongloop/express.svg)]() [![GoDoc](https://godoc.org/github.com/appleboy/drone-ssh?status.svg)](https://godoc.org/github.com/appleboy/drone-ssh) [![Build Status](http://drone.wu-boy.com/api/badges/appleboy/drone-ssh/status.svg)](http://drone.wu-boy.com/appleboy/drone-ssh) [![codecov](https://codecov.io/gh/appleboy/drone-ssh/branch/master/graph/badge.svg)](https://codecov.io/gh/appleboy/drone-ssh) [![Go Report Card](https://goreportcard.com/badge/github.com/appleboy/drone-ssh)](https://goreportcard.com/report/github.com/appleboy/drone-ssh) [![Docker Pulls](https://img.shields.io/docker/pulls/appleboy/drone-ssh.svg)](https://hub.docker.com/r/appleboy/drone-ssh/) [![](https://images.microbadger.com/badges/image/appleboy/drone-ssh.svg)](https://microbadger.com/images/appleboy/drone-ssh "Get your own image badge on microbadger.com")
+[![GitHub tag](https://img.shields.io/github/tag/appleboy/drone-ssh.svg)](https://github.com/appleboy/drone-ssh/releases) [![GoDoc](https://godoc.org/github.com/appleboy/drone-ssh?status.svg)](https://godoc.org/github.com/appleboy/drone-ssh) [![Build Status](http://drone.wu-boy.com/api/badges/appleboy/drone-ssh/status.svg)](http://drone.wu-boy.com/appleboy/drone-ssh) [![codecov](https://codecov.io/gh/appleboy/drone-ssh/branch/master/graph/badge.svg)](https://codecov.io/gh/appleboy/drone-ssh) [![Go Report Card](https://goreportcard.com/badge/github.com/appleboy/drone-ssh)](https://goreportcard.com/report/github.com/appleboy/drone-ssh) [![Docker Pulls](https://img.shields.io/docker/pulls/appleboy/drone-ssh.svg)](https://hub.docker.com/r/appleboy/drone-ssh/) [![](https://images.microbadger.com/badges/image/appleboy/drone-ssh.svg)](https://microbadger.com/images/appleboy/drone-ssh "Get your own image badge on microbadger.com")
 
 Drone plugin to execute commands on a remote host through SSH. For the usage
 information and a listing of the available options please take a look at

main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"fmt"
 	"os"
 
 	"github.com/joho/godotenv"
@@ -9,14 +8,22 @@ import (
 	"github.com/urfave/cli"
 )
 
-var build = "0" // build number set at compile-time
+// Version set at compile-time
+var Version = "v1.0.0-dev"
 
 func main() {
 	app := cli.NewApp()
-	app.Name = "ssh plugin"
-	app.Usage = "ssh plugin"
+	app.Name = "Drone SSH"
+	app.Usage = "Executing remote ssh commands"
+	app.Copyright = "Copyright (c) 2017 Bo-Yi Wu"
+	app.Authors = []cli.Author{
+		{
+			Name:  "Bo-Yi Wu",
+			Email: "appleboy.tw@gmail.com",
+		},
+	}
 	app.Action = run
-	app.Version = fmt.Sprintf("1.0.%s", build)
+	app.Version = Version
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:   "ssh-key",
@@ -66,6 +73,39 @@ func main() {
 		},
 	}
 
+	// Override a template
+	cli.AppHelpTemplate = `
+________                                         _________ _________ ___ ___
+\______ \_______  ____   ____   ____            /   _____//   _____//   |   \
+ |    |  \_  __ \/  _ \ /    \_/ __ \   ______  \_____  \ \_____  \/    ~    \
+ |    |   \  | \(  <_> )   |  \  ___/  /_____/  /        \/        \    Y    /
+/_______  /__|   \____/|___|  /\___  >         /_______  /_______  /\___|_  /
+        \/                  \/     \/                  \/        \/       \/
+                                                    version: {{.Version}}
+NAME:
+   {{.Name}} - {{.Usage}}
+
+USAGE:
+   {{.HelpName}} {{if .VisibleFlags}}[global options]{{end}}{{if .Commands}} command [command options]{{end}} {{if .ArgsUsage}}{{.ArgsUsage}}{{else}}[arguments...]{{end}}
+   {{if len .Authors}}
+AUTHOR:
+   {{range .Authors}}{{ . }}{{end}}
+   {{end}}{{if .Commands}}
+COMMANDS:
+{{range .Commands}}{{if not .HideHelp}}   {{join .Names ", "}}{{ "\t"}}{{.Usage}}{{ "\n" }}{{end}}{{end}}{{end}}{{if .VisibleFlags}}
+GLOBAL OPTIONS:
+   {{range .VisibleFlags}}{{.}}
+   {{end}}{{end}}{{if .Copyright }}
+COPYRIGHT:
+   {{.Copyright}}
+   {{end}}{{if .Version}}
+VERSION:
+   {{.Version}}
+   {{end}}
+REPOSITORY:
+    Github: https://github.com/appleboy/drone-ssh
+`
+
 	app.Run(os.Args)
 }
 

plugin.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"log"
 	"net"
 	"os"
@@ -8,10 +9,14 @@ import (
 	"strings"
 	"time"
 
-	"fmt"
 	"golang.org/x/crypto/ssh"
 )
 
+const (
+	missingHostOrUser    = "Error: missing server host or user"
+	missingPasswordOrKey = "Error: can't connect without a private SSH key or password"
+)
+
 type (
 	// Config for the plugin.
 	Config struct {
@@ -33,8 +38,12 @@ type (
 
 // Exec executes the plugin.
 func (p Plugin) Exec() error {
+	if len(p.Config.Host) == 0 && p.Config.User == "" {
+		return fmt.Errorf(missingHostOrUser)
+	}
+
 	if p.Config.Key == "" && p.Config.Password == "" {
-		return fmt.Errorf("Error: can't connect without a private SSH key or password")
+		return fmt.Errorf(missingPasswordOrKey)
 	}
 
 	for i, host := range p.Config.Host {

plugin_test.go

@@ -6,6 +6,15 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
+func TestMissingHostOrUser(t *testing.T) {
+	plugin := Plugin{}
+
+	err := plugin.Exec()
+
+	assert.NotNil(t, err)
+	assert.Equal(t, missingHostOrUser, err.Error())
+}
+
 func TestMissingKeyOrPassword(t *testing.T) {
 	plugin := Plugin{
 		Config{
@@ -17,4 +26,5 @@ func TestMissingKeyOrPassword(t *testing.T) {
 	err := plugin.Exec()
 
 	assert.NotNil(t, err)
+	assert.Equal(t, missingPasswordOrKey, err.Error())
 }