houston 업데이트를 스크립트로 하자

client/deploy.go

@@ -323,18 +323,33 @@ func (hc *houstonClient) prepareUpdateSelf(req *shared.DeployRequest) (srcdir st
 	return filepath.ToSlash(tempdir), replacer, err
 }
 
-func (hc *houstonClient) deploy(req *shared.DeployRequest, cb func(*protos.DeployingProgress)) error {
+func (hc *houstonClient) deploy(req *shared.DeployRequest, cb func(*protos.DeployingProgress)) (err error) {
 	logger.Println("start deploying")
-	root, err := hc.prepareDeploy(req.Name, req.Version)
-	if err != nil {
-		return err
+
+	defer func() {
+		if req.Name == "houston" && err == nil {
+			// houston.update 다운로드가 완료되었으므로 종료
+			// 종료되고나면 스크립트가 알아서 재 실행
+			hc.Shutdown()
+		}
+	}()
+	var root string
+	if req.Name == "houston" {
+		// houston은 버전없이 houston.update폴더로 다운로드
+		root = "./houston.update"
+	} else {
+		root, err = hc.prepareDeploy(req.Name, req.Version)
+		if err != nil {
+			return err
+		}
 	}
 
 	// verpath에 배포 시작
 	h := md5.New()
 	h.Write([]byte(strings.Trim(req.Url, "/")))
 	at := hex.EncodeToString(h.Sum(nil))
-	fname, err := download(root, hc.makeDownloadUrl(req.Url), at, func(written int64, total int64) {
+	var fname string
+	fname, err = download(root, hc.makeDownloadUrl(req.Url), at, func(written int64, total int64) {
 		prog := protos.DeployingProgress{
 			State:    "download",
 			Progress: written,
@@ -360,7 +375,7 @@ func (hc *houstonClient) deploy(req *shared.DeployRequest, cb func(*protos.Deplo
 		err = untar(fname)
 	}
 
-	if err == nil && len(req.Config) > 0 {
+	if err == nil && len(req.Config) > 0 && req.Name != "houston" {
 		// config.json도 다운로드
 		h := md5.New()
 		h.Write([]byte(strings.Trim(req.Config, "/")))