refactor: use internal/pkg to refactor structure

pkg/watcher/watcher.go

@@ -0,0 +1,37 @@
+package watcher
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"os/exec"
+)
+
+type WatcherIface interface {
+	Monitor(path string) error
+	Listen(binaryPath, scriptPath string, outputErr chan<- error)
+	Close() error
+}
+
+type DeployFunc func(binaryPath, scriptPath string) error
+
+func Deploy(binaryPath, scriptPath string) error {
+	err := execute(binaryPath, scriptPath)
+	if err != nil {
+		return fmt.Errorf("execute: %s", err)
+	}
+	log.Println("deploy done")
+	return nil
+}
+
+func execute(binaryPath, scriptPath string) error {
+	cmd := exec.Command(binaryPath, scriptPath)
+	cmd.Stdout = os.Stdout
+	cmd.Stderr = os.Stderr
+
+	if err := cmd.Run(); err != nil {
+		return fmt.Errorf("cmd.Run %s", err)
+	}
+
+	return nil
+}