add error output when using ssh public key

Makefile

@@ -1,3 +1,6 @@
+Version := $(shell date "+%Y%m%d%H%M")
+GitCommit := $(shell git rev-parse HEAD)
+LDFLAGS := "-s -w -X main.Version=$(Version) -X main.GitCommit=$(GitCommit)"
 
 run:
 	go run *.go -conf=example.toml
@@ -11,6 +14,11 @@ linux:
 windows:
 	CGO_ENABLED=0 GOOS=windows GOARCH=amd64 go build -o bin/remote-tail-win.exe *.go
 
+dist:
+	CGO_ENABLED=0 GOOS=linux go build -ldflags $(LDFLAGS) -a -installsuffix cgo -o bin/remote-tail-linux *.go
+	CGO_ENABLED=0 GOOS=darwin go build -ldflags $(LDFLAGS) -a -installsuffix cgo -o bin/remote-tail-darwin *.go	
+	CGO_ENABLED=0 GOOS=windows go build -ldflags $(LDFLAGS) -a -installsuffix cgo -o bin/remote-tail.exe *.go	
+
 deploy:
 	scp ./bin/remote-tail-linux root@192.168.1.223:/usr/bin/remote-tail
 	scp ./bin/remote-tail-linux root@192.168.1.237:/usr/bin/remote-tail

go.mod

@@ -0,0 +1,6 @@
+module github.com/mylxsw/remote-tail
+
+require (
+	github.com/BurntSushi/toml v0.3.1 // indirect
+	golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c
+)

go.sum

@@ -0,0 +1,5 @@
+github.com/BurntSushi/toml v0.3.1 h1:WXkYYl6Yr3qBf1K79EBnL4mak0OimBfB0XUf9Vl28OQ=
+github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c h1:Vj5n4GlwjmQteupaxJ9+0FNOmBrHfq7vN4btdGoDZgI=
+golang.org/x/crypto v0.0.0-20190325154230-a5d413f7728c/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=

main.go

@@ -23,6 +23,9 @@ var hostStr = flag.String("hosts", "", "-hosts=root@192.168.1.225,root@192.168.1
 var configFile = flag.String("conf", "", "-conf=example.toml")
 var slient = flag.Bool("slient", false, "-slient=false")
 
+var Version = ""
+var GitCommit = ""
+
 func usageAndExit(message string) {
 
 	if message != "" {
@@ -165,8 +168,8 @@ func getWelcomeMessage() string {
 |  _ <  __/ | | | | | (_) | ||  __/| | (_| | | |
 |_| \_\___|_| |_| |_|\___/ \__\___||_|\__,_|_|_|
 
-author: mylxsw
-homepage: github.com/mylxsw/remote-tail
-version: 0.1.2
+Author: mylxsw
+Homepage: github.com/mylxsw/remote-tail
+Version: ` + Version + "(" + GitCommit + ")" + `
 `
 }

ssh/ssh.go

@@ -25,9 +25,12 @@ func (this *Client) Connect() error {
 
 	if this.Password != "" {
 		conf.Auth = append(conf.Auth, ssh.Password(this.Password))
-	}
+	} else {
+		privateKey, err := getPrivateKey(this.PrivateKeyPath)
+		if err != nil {
+			return err
+		}
 
-	if privateKey, err := getPrivateKey(this.PrivateKeyPath); err == nil {
 		conf.Auth = append(conf.Auth, privateKey)
 	}