support password flag.

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

README.md

@@ -24,7 +24,7 @@ Build the docker image with the following commands:
 
 ```
 CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -tags netgo
-docker build --rm=true -t plugins/ssh .
+docker build -t plugins/ssh .
 ```
 
 Please note incorrectly building the image for the correct x64 linux and with

main.go

@@ -6,6 +6,7 @@ import (
 
 	"github.com/Sirupsen/logrus"
 	"github.com/joho/godotenv"
+	_ "github.com/joho/godotenv/autoload"
 	"github.com/urfave/cli"
 )
 
@@ -29,6 +30,11 @@ func main() {
 			EnvVar: "PLUGIN_USER,SSH_USER",
 			Value:  "root",
 		},
+		cli.StringFlag{
+			Name:   "password",
+			Usage:  "user password",
+			EnvVar: "PLUGIN_PASSWORD,SSH_PASSWORD",
+		},
 		cli.StringSliceFlag{
 			Name:   "host",
 			Usage:  "connect to host",
@@ -56,8 +62,9 @@ func main() {
 			EnvVar: "PLUGIN_SCRIPT,SSH_SCRIPT",
 		},
 		cli.StringFlag{
-			Name:  "env-file",
-			Usage: "source env file",
+			Name:   "env-file",
+			Usage:  "source env file",
+			EnvVar: "ENV_FILE",
 		},
 	}
 
@@ -75,6 +82,7 @@ func run(c *cli.Context) error {
 		Config: Config{
 			Key:      c.String("ssh-key"),
 			User:     c.String("user"),
+			Password: c.String("password"),
 			Host:     c.StringSlice("host"),
 			Port:     c.Int("port"),
 			Sleep:    c.Int("sleep"),

plugin.go

@@ -13,13 +13,14 @@ import (
 
 type (
 	Config struct {
-		Key      string        `json:"key"`
-		User     string        `json:"user"`
-		Host     []string      `json:"host"`
-		Port     int           `json:"port"`
-		Sleep    int           `json:"sleep"`
-		Timeout  time.Duration `json:"timeout"`
-		Script   []string      `json:"script"`
+		Key      string
+		User     string
+		Password string
+		Host     []string
+		Port     int
+		Sleep    int
+		Timeout  time.Duration
+		Script   []string
 	}
 
 	Plugin struct {
@@ -28,8 +29,8 @@ type (
 )
 
 func (p Plugin) Exec() error {
-	if p.Config.Key == "" {
-		return fmt.Errorf("Error: Can't connect without a private SSH key.")
+	if p.Config.Key == "" && p.Config.Password == "" {
+		return fmt.Errorf("Error: Can't connect without a private SSH key or password.")
 	}
 
 	for i, host := range p.Config.Host {
@@ -38,18 +39,28 @@ func (p Plugin) Exec() error {
 			strconv.Itoa(p.Config.Port),
 		)
 
-		signer, err := ssh.ParsePrivateKey([]byte(p.Config.Key))
+		// auths holds the detected ssh auth methods
+		auths := []ssh.AuthMethod{}
 
-		if err != nil {
-			return fmt.Errorf("Error: Failed to parse private key. %s", err)
+		if p.Config.Key != "" {
+			signer, err := ssh.ParsePrivateKey([]byte(p.Config.Key))
+
+			if err != nil {
+				return fmt.Errorf("Error: Failed to parse private key. %s", err)
+			}
+
+			auths = append(auths, ssh.PublicKeys(signer))
+		}
+
+		// figure out what auths are requested, what is supported
+		if p.Config.Password != "" {
+			auths = append(auths, ssh.Password(p.Config.Password))
 		}
 
 		config := &ssh.ClientConfig{
 			Timeout: p.Config.Timeout,
 			User:    p.Config.User,
-			Auth: []ssh.AuthMethod{
-				ssh.PublicKeys(signer),
-			},
+			Auth:    auths,
 		}
 
 		fmt.Printf("+ ssh %s@%s -p %d\n", p.Config.User, addr, p.Config.Port)